Sampling structure and battery pack

Abstract

The invention provides a sampling structure and a battery pack, and belongs to the technical field of batteries, the sampling structure comprises a confluence assembly and an acquisition assembly, the confluence assembly comprises two rows of busbars arranged at intervals along a second direction, and the busbars are connected with terminals of battery monomers; the acquisition assembly comprises a signal acquisition piece and a sampling plate, the signal acquisition piece comprises a body and a first connecting piece, the body is arranged on one side, far away from the central surface of the battery monomer, of the confluence assembly in a second direction, and the second direction is perpendicular to the first direction; the body is connected with the sampling plate through the first connecting piece and is connected with the busbar. The body is arranged on the outer side of the confluence assembly, a traditional isolation plate is not arranged any more, when one battery single body breaks down, only the busbar corresponding to the battery single body needs to be detached, then the faulted battery single body can be taken out independently, and the repair efficiency of the battery single bodies is improved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a sampling structure and a battery pack. Background Art

[0002] The sampling structure is an important component of the battery pack. The sampling structure is used to monitor the voltage and temperature of the battery cell in real time. The traditional sampling structure includes an isolation plate, a busbar and a signal acquisition component. The isolation plate is arranged on the top surface of the battery assembly, the busbars are arranged on both sides of the top surface of the isolation plate, and are used to weld the terminals of the battery cell. The signal acquisition component is arranged in the middle of the top surface of the isolation plate. The battery assembly includes a number of battery cells arranged in sequence.

[0003] When a battery cell in a battery assembly fails, if the above-mentioned sampling structure is used, when the failed battery cell is taken out, since the isolation plate in the sampling structure covers the side where the terminal of the battery cell is welded to the bus, and the isolation plate is an integrated structure, and a signal collection component is also provided on the top surface of the isolation plate, even if the connection point between the bus and the battery cell is removed, the isolation plate and the signal collection component in the existing sampling structure will still interfere with the removal of the failed battery cell.

[0004] In summary, for a battery pack using an existing sampling structure, if a faulty battery cell needs to be removed during maintenance and repair, the entire sampling structure needs to be disassembled to achieve the above purpose. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that when a battery cell in a battery pack needs to be repaired, the complete sampling structure needs to be disassembled before a single battery cell can be taken out, which reduces the repair efficiency, thereby providing a sampling structure and a battery pack.

[0006] In order to solve the above technical problems, the present invention provides a sampling structure, comprising:

[0007] A busbar assembly, comprising two rows of busbars spaced apart along a second direction, wherein the busbars are connected to terminals of the battery cells;

[0008] A collection component, comprising a signal collection member and a sampling plate, wherein the signal collection member comprises a body and a first connecting member, wherein the body is provided in two rows, wherein one row of the body is arranged correspondingly to one row of the busbars, and the body is arranged on one side of the busbar assembly away from the central plane of the battery cell in the second direction;

[0009] The main body is connected to the sampling plate through the first connecting member, and the main body is connected to the bus bar through the second connecting member to collect signals of the battery cells.

[0010] Optionally, a first area with a vacant center is formed between the side walls of two rows of bus bars that are close to each other.

[0011] Optionally, the sampling plate is disposed in the first region and located at at least one end of the first region in the first direction.

[0012] Optionally, the number of the sampling plate is one, and both rows of the bodies are connected to the sampling plate;

[0013] Alternatively, the number of the sampling plates is two, and the two sampling plates are respectively arranged at the two ends of the first area along the first direction, each row of the bodies includes two first bodies and a second body arranged along the first direction, the first bodies in the two rows of the bodies are connected to the sampling plates located at the same end as the first bodies along the first direction, and the second bodies in the two rows of the bodies are connected to the sampling plates located at the same end as the second bodies along the first direction.

[0014] Optionally, the sampling plate is arranged in the first region, an insulating plate adapted to the sampling plate is arranged in the first region, and the sampling plate is arranged on the insulating plate.

[0015] Optionally, a first positioning member is provided on the insulating plate, and a second positioning member is provided on the busbar, and the first positioning member and the second positioning member are adapted to position the insulating plate.

[0016] Optionally, the sampling plate is arranged in the first area, and the first connecting member is arranged around the bus bar.

[0017] Optionally, the first connecting member is an integral structure with the body, the first connecting member includes a first connecting section connected to the body, and a second connecting section connected to the first connecting section, the second connecting section is connected to the sampling plate, the first connecting section is located on the outside of the bus assembly along the first direction, the second connecting section is located between two rows of the bus bars, and the first connecting member is an integral structure with the body, the first connecting section is folded relative to the body, and the second connecting section is folded relative to the first connecting section.

[0018] Optionally, the body is flexibly connected to the busbar.

[0019] Optionally, the signal collection component further comprises a second connecting member, the body is connected to the bus bar via the second connecting member, and the second connecting member (8) is flexibly connected to the bus bar (1).

[0020] Optionally, the main body and / or the second connecting member are made of flexible material.

[0021] Optionally, a third connecting member is further included, one end of the third connecting member is connected to the bus bar, and the other end is flexibly connected to the second connecting member, and the third connecting member is a metal conductive sheet.

[0022] The present invention also provides a battery pack, comprising: a box body, at least one battery assembly arranged in the box body and at least one of the above-mentioned sampling structures, wherein the battery assembly comprises a plurality of battery cells arranged along a first direction, the sampling structure is arranged on an end surface of the battery assembly away from the box body, and the busbar assembly in the sampling structure is connected to the terminal of the battery cell.

[0023] Optionally, the battery assembly is provided with at least two, and the projection of the body of the sampling structure located between the box and the battery assembly at least partially overlaps with the projection of the battery assembly in the third direction; and / or,

[0024] The projections of two bodies in two adjacent sampling structures and close to each other do not overlap in the third direction, or at least partially overlap.

[0025] Optionally, the battery assembly is provided with at least two, and projections of two bodies in two adjacent sampling structures that are close to each other do not overlap in the third direction, or at least partially overlap.

[0026] Optionally, the battery assembly is provided with at least two, and the battery pack further comprises:

[0027] A first fixing assembly is arranged between two adjacent battery assemblies, the first fixing assembly comprises a first pressing plate and a first connecting plate, the first pressing plate is pressed on the battery assembly, and the first connecting plate is detachably connected to the fixing beam in the box body;

[0028] The first pressing plate is disposed between the body and the battery assembly in the third direction.

[0029] Optionally, the number of the first fixing assembly between two adjacent battery assemblies is one, and the first fixing assembly includes a first connecting plate, and two first pressing plates integrally connected to the first connecting plate, and the two first pressing plates are respectively pressed on the two adjacent battery assemblies;

[0030] Alternatively, the number of the first fixing components between two adjacent battery assemblies is two, each of the first fixing components includes a first connecting plate and a first pressure plate integrally connected to the first connecting plate, and the first pressure plates in the two first fixing components are respectively pressed on two adjacent battery assemblies.

[0031] Optionally, a support plate is further included, which is arranged on a side of the first pressing plate away from the battery cell in the second direction, the support plate is arranged flush with the first pressing plate, and the support plate is used to support the body.

[0032] Optionally, the battery pack further comprises: a second fixing assembly, arranged between the battery assembly and the box frame, the second fixing assembly comprising a second pressing plate and a second connecting plate, the second pressing plate being pressed on the battery assembly, and the second connecting plate being detachably connected to the box frame or a fixing beam in the box;

[0033] The second pressing plate is disposed between the body and the battery assembly in the third direction.

[0034] Optionally, the battery pack further includes:

[0035] The positioning frame is arranged in the box body, and a plurality of positioning grooves are arranged in the positioning frame, and the positioning grooves are used to clamp the battery monomers.

[0036] Optionally, a plurality of protrusions are provided on the inner wall of the positioning frame, and two adjacent positioning grooves are separated by the protrusions.

[0037] The technical solution of the present invention has the following advantages:

[0038] The sampling structure provided by the present invention includes a bus assembly and a collection assembly. The bus assembly includes two rows of buses arranged at intervals along the second direction, and the buses are connected to the terminals of the battery cells. The collection assembly includes a signal collection component and a sampling board. The signal collection component includes a main body and a first connecting component. The main body is provided with two rows, and one row of the main body is arranged corresponding to one row of the bus bars. The main body is arranged on one side of the bus assembly away from the center plane of the battery cell in the second direction; the main body is connected to the sampling board through the first connecting component, and the main body is connected to the bus bar to collect the signal of the battery cell.

[0039] By setting the body in the acquisition component on the side of the busbar component away from the center plane of the battery cell in the second direction, that is, on the outside of the busbar component, and no longer setting the traditional isolation plate, the battery cell is no longer interfered by the isolation plate and the body in the signal acquisition component when it is taken out. Specifically, when one of the battery cells fails, the connection between the busbar on the battery cell and the connection point of the terminal is disconnected, and the failed battery cell can be taken out separately without disassembling the remaining sampling structures. The disassembly method is simple, which greatly improves the efficiency of repairing the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of a sampling structure provided in Example 1 of the present invention;

[0042] Figure 2 A schematic diagram of another implementation of the sampling structure provided in Example 1 of the present invention;

[0043] Figure 3 for Figure 2 A local enlarged schematic diagram in FIG.

[0044] Figure 4 A schematic diagram of an exploded structure of a battery pack according to an embodiment of the present invention;

[0045] Figure 5 A schematic diagram of an exploded structure of another implementation manner of a battery pack provided in Example 2 of the present invention;

[0046] Figure 6 for Figure 5 A local enlarged schematic diagram in FIG.

[0047] Figure 7 for Figure 5 A schematic structural diagram of the second fixing component;

[0048] Figure 8 for Figure 4 Schematic diagram of the structure of the positioning framework.

[0049] Description of reference numerals:

[0050] 1. Bus; 2. Battery cell; 3. Collection component; 4. First area; 5. Sampling plate; 6. Insulating plate; 7. Main body; 71. First main body; 72. Second main body; 8. Second connecting member; 9. Box; 10. First fixing component; 11. First pressing plate; 12. First connecting plate; 13. Second fixing component; 14. Second pressing plate; 15. Second connecting plate; 16. Support plate; 17. Positioning frame; 18. Positioning groove; 19. First connecting member; 20. Third connecting member; 21. Temperature detection member; 22. First vertical plate; 23. Second vertical plate; 24. First positioning member; 25. Second positioning member; 26. Center plane. DETAILED DESCRIPTION

[0051] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0055] Example 1

[0056] The sampling structure is the physical carrier of the battery management system (BMS) transmission. It is mainly composed of signal acquisition components, isolation plates and bus bars, etc., and is used to achieve electrical connection between battery cells between battery components. Due to the arrangement of the signal acquisition components and the existence of isolation plates, when the battery cells of the battery pack need to be disassembled, the sampling structure needs to be completely disassembled before operation can be performed. Therefore, not only is the rework efficiency low, but it is also not easy to maintain.

[0057] The sampling structure provided in this embodiment no longer has the isolation plate in the traditional sampling structure, which facilitates the disassembly of a single battery cell, has a simple structure, and is easy to disassemble.

[0058] like Figure 1 and Figure 2As shown, a specific implementation of the sampling structure provided in this embodiment includes a bus assembly and a collection assembly 3. The bus assembly includes two rows of bus bars 1 spaced apart along the second direction, and the bus bars 1 are connected to the terminals of the battery cells 2; the collection assembly 3 includes a signal collection component and a sampling board 5, and the signal collection component includes a main body 7 and a first connecting member 19. The main body 7 is provided with two rows, and a row of main bodies 7 is arranged corresponding to a row of bus bars 1. The main body 7 is arranged on a side of the bus assembly away from the center plane 26 of the battery cells 2 in the second direction; the main body 7 is connected to the sampling board 5 through the first connecting member 19, and the main body 7 is connected to the bus bar 1 to collect the signal of the battery cells 2.

[0059] The first direction is Figure 4 The middle X direction, the second direction is Figure 4 The middle Y direction, the third direction is Figure 4 Z direction. By arranging the main body 7 on the outside of the bus assembly and not arranging the traditional isolation plate, the battery cell 2 is no longer interfered by the isolation plate and the main body 7 in the signal acquisition component when it is taken out. When one of the battery cells 2 fails, the bus bar 1 on the battery cell 2 is disconnected from the connection point of the terminal, and the faulty battery cell 2 can be taken out separately without disassembling the remaining sampling structures. The disassembly method is simple, which greatly improves the repair efficiency of the battery cell 2.

[0060] Specifically, the signal acquisition component is one of FPC (Flexible Printed Circuit), FFC (Flexible Flat Cable), and FDC (Flexible Die-cutting Circuit). Among them, FPC is a flexible printed circuit board, which is made of polyimide or polyester film as a substrate, has high reliability, excellent flexibility, and has the characteristics of high wiring density, light weight, thin thickness, and good bendability, eliminating the connection work of redundant wiring; FFC is a flexible flat cable, which is made of PET-based insulating hot-melt tape and extremely thin tinned flat copper wire, and is pressed together through an automated equipment production line. It has the advantages of good flexibility, foldable and bendable, thin thickness, small size, simple connection, convenient disassembly, and easy electromagnetic shielding; FDC is a flexible die-cut circuit board, which is a circuit made of polyimide or polyester film substrate through a die-cutting process, has high reliability and flexibility, and can be freely bent, folded, wound and moved.

[0061] The sampling board 5 is a PCBA (Printed Circuit Board Assembly) or a PCB (Printed Circuit Board), which is responsible for collecting key operating parameters of each battery cell 2, such as voltage, current, and temperature, and converting these operating parameters into weak electrical signals suitable for subsequent processing and analysis, which helps to monitor the working status of each battery cell 2 in real time, facilitates timely identification of battery cells 2 with abnormal working status, and enables the main body 7 to integrate self-protection elements after overcurrent and overvoltage, such as fuses, so as to facilitate timely cutting off the circuit between the battery cell and the load, thereby reducing losses.

[0062] Specifically, Figure 1 As shown, the sampling plate 5 and the body 7 are connected via a first connecting piece 19 , and the two bodies 7 located outside the confluence assembly are each connected to a first connecting piece 19 , and the first connecting piece 19 is further connected to the sampling plate 5 .

[0063] In addition, if Figure 2 As shown, as an alternative embodiment, two bodies 7 may be configured with one first connecting member 19 , and the two bodies 7 are connected to the sampling plate 5 via the common first connecting member 19 .

[0064] like Figure 1 and Figure 2 As shown, the sampling structure provided in this embodiment has two rows of busbars 1, wherein the two rows of busbars 1 are arranged at intervals along the first direction. Specifically, the busbars 1 are connected to the terminals of the battery cells 2 by arranging one row of busbars 1 at intervals from the other row of busbars 1; and a first region 4 with an empty middle portion is formed between the side walls of the two rows of busbars 1 that are close to each other.

[0065] It can be explained that, for the first area 4: due to the use of a sampling structure without an isolation plate, and the main body 7 of the signal acquisition component is located on the outside of the bus assembly, the side where the battery cell 2 is connected to the sampling structure is no longer covered by the isolation plate and the signal acquisition component, so that the area between the two rows of buses 1 in the sampling structure forms an empty first area 4. The first area 4 is specifically the area between the two rows of buses 1 and does not block the end face of the battery cell 2 on the side connected to the sampling structure; at the same time, for the end face on this side of the battery cell 2, since it is not blocked, the setting of the first area 4 is conducive to the heat dissipation of the battery cell 2.

[0066] It can be explained that, in this embodiment, the battery cell 2 further includes an explosion-proof valve, and the explosion-proof valve can be arranged on any side surface of the battery cell 2 .

[0067] Among them, when the explosion-proof valve is set, its position is on the same side as the sampling structure. Since a sampling structure without an isolation plate is adopted and the body 7 of the signal acquisition component in the sampling structure is located on the outside of the bus assembly, a vacant first area 4 is formed between the two rows of bus bars 1 close to each other on the side wall surface. At this time, the explosion-proof valve of the battery cell 2 is just located below the first area 4. Therefore, in the event of thermal runaway of the battery cell 2, the hot material ejected by the explosion-proof valve will not directly contact the sampling structure, ensuring that the sampling structure can still work effectively in the event of thermal runaway, ensuring the integrity of the battery management system (BMS), and enabling the battery management system (BMS) to still manage the battery pack.

[0068] like Figure 1 and Figure 2 As shown, in the sampling structure provided by this embodiment, the sampling plate 5 is arranged in the first area 4 and is located at at least one end of the first area 4 in the first direction.

[0069] For the traditional sampling structure, the sampling plate is set in the electrical compartment of the battery pack, which will occupy part of the space of the electrical compartment. Therefore, in this embodiment, by setting the installation position of the sampling plate 5 in the first area 4, the structure of the electrical compartment can be made more compact, thereby increasing the space of the battery compartment in the battery pack, thereby increasing the energy density of the battery pack. In addition, setting the sampling plate 5 at the end of the first area 4 ensures that the size of the first connector 19 is the shortest, reduces the first area 4 occupied by the first connector 19, and improves the heat dissipation effect.

[0070] One specific implementation method is as follows: Figure 2 As shown, the sampling plate 5 has one, and the sampling plate 5 is arranged at one end of the first area 4 along the first direction. Each row of bodies 7 includes a body 7, that is, the bodies 7 of the signal acquisition parts located on both sides are connected to the sampling plate 5 at the same time, and the signals of the two bodies 7 are transmitted to the same sampling plate 5.

[0071] In addition, as an alternative embodiment, Figure 1As shown, there are two sampling plates 5, which are respectively arranged at the two ends of the first area 4 along the first direction, and each row of bodies 7 includes two first bodies 71 and second bodies 72 arranged along the first direction. The first bodies 71 in the two rows of bodies 7 are connected to the sampling plates 5 located at the same end as the first bodies 71 along the first direction, and the second bodies 72 in the two rows of bodies 7 are connected to the sampling plates 5 located at the same end as the second bodies 72 along the first direction. For a battery assembly composed of more battery cells 2, as the number of battery cells 2 increases, the corresponding transmission lines in the body 7 also need to increase, and then the width of the body 7 needs to be increased. In addition, the path of the battery cells 2 at the far end connected to the sampling plate 5 through the transmission line of the body 7 also needs to be longer, which ultimately affects the overall performance of the battery pack. The present application uses one sampling structure to correspond to two sampling plates 5, and divides a row of bodies 7 into a first body 71 and a second body 72, so that the first body 71 of the two rows of bodies 7 is connected to the sampling plate 5 arranged close to the first body 71, and the second body 72 of the two rows of bodies 7 is connected to the sampling plate 5 arranged close to the second body 72, so that the transmission path of the body 7 can be shortened, and the transmission line included in a single body 7 can be reduced, thereby reducing the width of the single body 7.

[0072] In other embodiments, the number of sampling plates 5 may be greater, for example, three or more sampling plates 5 may be provided, and each row of the body 7 may be disassembled into three or more sections to correspond to the number of sampling plates 5 .

[0073] like Figure 1 and Figure 2 As shown, in the sampling structure provided in this embodiment, an insulating plate 6 adapted to the sampling plate 5 is arranged in the first area 4 , and the sampling plate 5 is arranged on the insulating plate 6 .

[0074] The sampling plate 5 and the battery assembly are isolated by the setting of the insulating plate 6, which is safer. Specifically, the insulating plate 6 is adapted to the sampling plate 5, which means that the size of the insulating plate 6 only needs to be set in the area where the sampling plate 5 is located, and does not need to occupy the first area 4 at other positions.

[0075] like Figure 2 As shown, in the sampling structure provided in this embodiment, a first positioning member 24 is provided on the insulating plate 6 , and a second positioning member 25 is provided on the busbar 1 . The first positioning member 24 and the second positioning member 25 are adapted to position the insulating plate 6 .

[0076] In the first positioning member 24 and the second positioning member 25 , one of them is a protrusion structure, and the other of them is a groove structure.

[0077] Specifically, the first positioning member 24 is a protruding structure, and the second positioning member 25 is a groove structure. The protruding structure is clamped in the groove structure to position and fix the insulating plate 6.

[0078] like Figure 1 As shown, the first connecting member 19 is arranged around the busbar 1. This arrangement allows the first connecting member 19 to be connected to the sampling plate 5 without crossing the busbar 1.

[0079] Specifically, in the sampling structure provided in this embodiment, the first connecting member 19 includes a first connecting section connected to the main body 7, and a second connecting section connected to the first connecting section, the second connecting section is connected to the sampling plate, the first connecting section is located on the outside of the bus assembly along the first direction, and the second connecting section is located between two rows of buses 1.

[0080] In a preferred embodiment, the first connecting member 19 and the body 7 are an integral structure, the first connecting section is folded relative to the body, and the second connecting section is folded relative to the first connecting section. In this embodiment, when the first connecting section and the second connecting section in the first connecting member 19 are not folded, the first connecting member 19 and the body 7 are arranged in a linear shape, which can be achieved by simply folding the existing body 7 and the first connecting member 19, without the need for special improvements to the structure of the existing signal acquisition member.

[0081] In an alternative embodiment, the first connecting member 19 and the body 7 can be arranged in a "U"-shaped structure without being folded, so there is no need to fold the body 7 and the first connecting member 19. The first connecting member 19 and the body 7 can be directly processed by a mold.

[0082] In other embodiments, the first connector 19 passes through the top of the bus 1 along the second direction and is connected to the sampling plate 5, that is, the first connector 19 partially overlaps with the projection of the bus 1 in the third direction. By adopting this embodiment, the size of the first connector 19 can be reduced.

[0083] like Figure 1-Figure 3 As shown, in this embodiment, the body 7 is flexibly connected to the busbar 1 .

[0084] In the battery pack using the sampling structure of this embodiment, the shoulder of the battery assembly relies on the fixing assembly to press and fix the battery assembly in the third direction. Before removing one of the battery cells 2 in the battery assembly, the fixing assembly needs to be removed first. Since the main body 7 in the sampling structure is located on the side away from the center surface of the battery cell 2, and in order to satisfy the pressing effect of the fixing assembly on the battery assembly, the fixing assembly is generally located between the battery assembly and the sampling structure, the main body 7 in the sampling structure will interfere with the removal of the fixing assembly, so that the main body 7 and the bus 1 are flexibly connected, that is, the main body 7 can be lifted up during the removal of the fixing assembly, which facilitates the removal of the fixing assembly.

[0085] Preferably, the body 7 is made of a flexible material, so as to realize a flexible connection between the body 7 and the busbar 1. With such a configuration, the body 7 can be directly lifted up, which is convenient for removing the fixed components and realizing the subsequent removal of the faulty battery cell 2. Exemplarily, the body 7 is any one of FPC, FFC, and FDC.

[0086] like Figures 1 to 3 As shown, in the sampling structure provided in this embodiment, the signal acquisition member further includes a second connecting member 8, and the body 7 is connected to the bus 1 through the second connecting member 8, and the second connecting member 8 and the bus 1 are flexibly connected. The second connecting member 8 and the bus 1 are flexibly connected, and through the flexible connection, the second connecting member 8 can be bent relative to the bus 1, so that the body 7 can be lifted.

[0087] Preferably, the second connector 8 is made of a flexible material to achieve a flexible connection between the bus bars 1 of the second connector 8; due to its flexible nature, it can be bent, and the main body 7 can be lifted by the second connector 8 to facilitate the removal of the fixed components and the subsequent removal of the faulty battery cell 2.

[0088] A specific implementation method, such as Figure 3 As shown, the third connector 20 is also included. One end of the third connector 20 is connected to the bus 1, and the other end is flexibly connected to the second connector 8. The third connector 20 is a metal conductive sheet. The second connector 8 and the bus 1 are connected through the third connector 20. The third connector 20 can be a nickel sheet or a copper sheet, which has high conductivity and can enhance the connection strength of the second connector 8 relative to the bus 1. And the flexible connection between the third connector 20 and the second connector 8 can realize the characteristic that the second connector 8 can be bent relative to the bus 1. Among them, the flexible connection between the third connector 20 and the second connector 8 can also be achieved by making the second connector 8 a flexible material.

[0089] Among them, the second connector 8 and the body 7, and the second connector 8 and the third connector 20 are connected through pads. The setting of the pads provides electrical connection and mechanical fixation to ensure reliable connection. The pads provide low impedance and low noise paths to ensure effective transmission of signals and power and reduce signal attenuation and interference. Specifically, the pads can be round, square or rectangular, and the corresponding pads are welded to complete the connection. The setting of the pads is convenient for separate disassembly.

[0090] A preferred embodiment, such as Figure 3 As shown, a temperature detection member 21 can be provided on the third connection member 20 , and the temperature signal of the battery cell 2 is transmitted to the sampling board 5 through the setting of the temperature detection member 21 to complete the collection, and the temperature signal is monitored to ensure the safety of the battery unit.

[0091] Specifically, the temperature detection element 21 is an NTC temperature sensor, which has high sensitivity and fast response speed. The temperature is monitored by utilizing the characteristic that the resistance value of the NTC sensor decreases rapidly as the temperature rises under a certain measurement power. The detection end of the temperature detection element 21 contacts the battery cell 2 after passing through the bus 1, and generally several battery cells 2 are selected for temperature detection.

[0092] Example 2

[0093] like Figure 4 and Figure 5 As shown in FIG. 1 , a specific implementation of the battery pack provided in this embodiment is shown. The battery pack includes a box body 9, at least one battery assembly disposed in the box body 9, and at least one sampling structure mentioned in Embodiment 1. The battery assembly includes a plurality of battery cells 2 arranged along a first direction, the sampling structure is disposed on the end face of the battery assembly away from the box body 9, and the busbar assembly in the sampling structure is connected to the terminal of the battery cell 2. It is particularly noted that when the battery assembly is as Figure 5 When it is placed upright on the bottom plate of the box body 9 as shown (i.e., the terminals of the battery cell 2 are arranged upward), the sampling structure is arranged on the end surface of the battery assembly in the third direction away from the box body, which means that the sampling structure is arranged on the top surface of the battery assembly; when the battery assembly is inverted (i.e., the terminals of the battery cell 2 are arranged downward), the corresponding box body 9 is also inverted. At this time, the battery assembly is located below the bottom plate of the box body 9, and the sampling structure is arranged on the end surface of the battery assembly in the third direction away from the box body 9, which means that the sampling structure is arranged on the bottom surface of the battery assembly; in addition, the box body 9 in the present application can be the upper box body of the battery pack or the lower box body of the battery pack, which is not limited here.

[0094] In this embodiment, one battery assembly corresponds to one sampling structure. The battery pack in this embodiment can remove the faulty battery cell after removing the connection point between the bus and the faulty battery cell by applying the sampling structure in Embodiment 1.

[0095] like Figure 1 and Figure 2 As shown, in the battery pack provided by the present application, there are at least two battery assemblies, wherein the projection of the body 7 of the sampling structure located between the box 9 and the battery assembly overlaps at least partially with the projection of the battery assembly in the third direction. The projection of the body 7 of the sampling structure located between the battery assembly and the battery assembly does not overlap with the projection of the battery assembly in the third direction, or at least overlaps partially.

[0096] For the main body 7 of the sampling structure located between the box 9 and the battery assembly, its projection with the battery assembly in the third direction includes two situations: complete overlap and partial overlap. Both partial overlap and complete overlap can reduce the distance that the main body 7 extends out of the battery assembly in the second direction, thereby avoiding the main body 7 from extending too long in the second direction, so that additional space is required between the frame of the box 9 and the battery assembly to accommodate the distance that the main body 7 extends, making the structure of the battery pack more compact.

[0097] For the main body 7 of the sampling structure located between the battery assembly and the battery assembly, the projection conditions of the main body 7 and the battery assembly in the third direction include three conditions: non-overlapping, complete overlapping and partial overlapping. For the non-overlapping condition, it is beneficial to reduce the electromagnetic interference of the battery assembly on the main body 7, and can avoid the main body 7 affecting the removal of the battery cell 2 when the battery cell 2 is disassembled; for the complete overlapping and partial overlapping conditions, the distance that the main body 7 extends out of the battery assembly in the second direction can also be reduced, thereby avoiding the main body 7 extending too long in the second direction, so that additional space is required between adjacent battery assemblies to accommodate the distance that the main body 7 extends, which can reduce the distance between adjacent battery assemblies, thereby making the structure of the battery pack more compact.

[0098] In this embodiment, the battery assembly is provided with at least two, and the projections of the two bodies 7 in two adjacent sampling structures and close to each other do not overlap in the third direction, or at least partially overlap.

[0099] The situation where the projections of the two main bodies 7 at least partially overlap in the third direction includes two situations: partial overlap and complete overlap. Both partial overlap and complete overlap can reduce the projection area of ​​the two main bodies 7 in the third direction, and avoid the projection area of ​​the two main bodies 7 in the third direction being too large, resulting in the need to set up additional space between two adjacent battery assemblies to accommodate the two main bodies 7, or the need for the two main bodies 7 and the two adjacent battery assemblies to overlap in the third direction, thereby causing the main body 7 to affect the removal of the battery cell 2 when the battery cell 2 is disassembled.

[0100] In the case where the projections of the two bodies 7 do not overlap in the third direction, since the body 7 is mainly used for signal transmission, electromagnetic interference may occur between the two overlapping bodies 7, thereby affecting the signal transmission. Therefore, the two bodies 7 set separately are helpful to solve the above problem.

[0101] like Figures 5 to 7As shown, the battery pack provided in this embodiment also includes a first fixing component 10 and a second fixing component 13. The first fixing component 10 is arranged between two adjacent battery assemblies, and the first fixing component 10 includes a first pressing plate 11 and a first connecting plate 12. The first pressing plate 11 is pressed on the battery assembly, and the first connecting plate 12 is detachably connected to the fixed beam in the box body 9; the second fixing component 13 is arranged between the battery assembly and the frame of the box body 9, and the second fixing component 13 includes a second pressing plate 14 and a second connecting plate 15. The second pressing plate 14 is pressed on the battery assembly, and the second connecting plate 15 is detachably connected to the frame of the box body 9 or the fixed beam in the box body 9; wherein the first pressing plate 11 and the second pressing plate 14 are both located between the main body 7 and the battery assembly in the third direction.

[0102] The first pressing plate 11 and the second pressing plate 14 press the battery assembly to fix the battery assembly in the box 9. The battery assembly no longer needs to be connected to the box 9 by gluing, so as to fix the battery assembly relative to the box 9. The cooperation between the first pressing plate 11 and the first connecting plate 12, the second pressing plate 14 and the second connecting plate 15 fixes the battery assembly. When disassembly is required, the battery assembly can be taken out by simply separating the connecting plate and the box 9, and the disassembly is convenient and quick. At the same time, after the fixing assembly is disassembled, the connection point between the faulty battery cell 2 and the bus 1 can be removed, so that the faulty battery cell 2 can be taken out to achieve the purpose of disassembly. Specifically, the first fixing assembly 10 and the second fixing assembly 13 are both arranged along the first direction, and the long side of the battery assembly is pressed, which has a good stabilizing effect.

[0103] In addition, since the supporting parts of the first pressing plate 11 and the second pressing plate 14 for the main body 7 in the signal acquisition component in the third direction are both located between the main body 7 and the battery assembly, the purpose of separating the main body 7 and the battery assembly from each other is achieved, thereby replacing the role of the isolation plate in the traditional sampling structure, and achieving insulation of the main body 7 in the signal acquisition component relative to the battery assembly.

[0104] A specific implementation of the first fixing component 10 is as follows: Figure 6As shown, there is one first fixing assembly 10 between two adjacent battery assemblies, and the first fixing assembly 10 is an integrally formed structure. Specifically, the first fixing assembly 10 includes a first connecting plate 12, and two first pressing plates 11 integrally connected to the first connecting plate 12, and the two first pressing plates 11 are respectively pressed on the two adjacent battery assemblies. That is, the two first pressing plates 11 share one first connecting plate 12, which has a simple structure, reduces space occupancy, and avoids large gaps between adjacent battery assemblies. Exemplarily, the integrally formed structure can be an inverted "X"-shaped structure; wherein the horizontally arranged first pressing plate 11 and the horizontally arranged first connecting plate 12 are connected by a vertically arranged first vertical plate 22, wherein the first connecting plate 12 is connected to the fixed beam in the box body 9.

[0105] Another specific implementation of the first fixing component 10 is that there are two first fixing components 10 between two adjacent battery components, each first fixing component 10 is independently provided and used to fix its corresponding battery component, and each first fixing component includes a first connecting plate 12 and an integrally connected first pressure plate 11.

[0106] A specific implementation of the second fixing component 13 is as follows: Figure 7 As shown, the horizontally arranged second pressure plate 14 and the second connecting plate 15 are connected by a vertically arranged second vertical plate 23. The second connecting plate 15 is lower than the second pressure plate 14. The second vertical plate 23 can contact the side of the battery assembly or the liquid cooling plate on the battery assembly. The vertically arranged second vertical plate 23 makes the internal structure more compact; the first connecting plate 12 and the second connecting plate 15 are connected to the frame of the box body 9 or the fixed beam inside the box body 9 by bolts, which is convenient for installation and disassembly.

[0107] like Figure 6 As shown, the battery pack provided in this embodiment also includes a support plate 16, which is arranged on the side of the first pressure plate 11 or the second pressure plate 14 away from the battery cell 2 in the second direction, and the support plate 16 is arranged flush with the first pressure plate 11; the support plate 16 is arranged flush with the second pressure plate 14, and the support plate 16 is used to support the main body 7.

[0108] The support plate 16 supports the body 7 disposed outside the battery assembly, ensuring the stability of the body 7. The support plate 16 and the first pressing plate 11 or the second pressing plate 14 jointly support the body 7, with a larger supporting area and a better supporting effect. Specifically, the support plate 16 and the pressing plate or the vertical plate are detachably connected, and can be selected as a snap connection for easy disassembly.

[0109] Specifically, the first fixing assembly 10, the second fixing assembly 13, and the support plate 16 are all made of insulating materials, which further improves the insulation performance between the body 7 and the battery assembly. In other embodiments, the first fixing assembly 10, the second fixing assembly 13, and the support plate 16 are made of metal inside and are coated with an insulating film or an insulating layer outside.

[0110] Specifically, the body 7 is detachably connected to the support plate 16. Exemplarily, the body 7 is attached to the support plate 16 by adhesive, and the installation is stable. When disassembling, the adhesive is removed to remove the support plate 16.

[0111] In other embodiments, the support plate 16 may not be provided, and the body 7 is supported only by the first pressing plate 11 and the second pressing plate 14 .

[0112] In the battery pack provided in this embodiment, two bodies 7 between two adjacent battery assemblies are stacked on a support plate 16 .

[0113] Between two adjacent battery assemblies, a support plate 16 is disposed between two first vertical plates 22 . The support plate 16 may be a flat plate structure, a T-shaped structure or an inverted U-shaped structure.

[0114] like Figure 8 As shown, the battery pack provided in this embodiment further includes a positioning frame 17 , which is disposed in the box body 9 . A plurality of positioning grooves 18 are disposed in the positioning frame 17 , and the positioning grooves 18 are used to clamp the battery cells 2 .

[0115] Specifically, the positioning frame 17 is a frame structure with an upper opening, and the positioning frame 17 can be used to position the battery cell 2 except Figure 4 The other directions of the middle and third directions are all positioned, and each battery cell 2 is arranged in a positioning groove 18, so as to facilitate the individual fixation of the battery cell 2.

[0116] Specifically, a plurality of convex edges are provided on the inner wall of the positioning frame 17, and two adjacent positioning grooves 18 are separated by the convex edges. Therefore, the battery cells 2 are also separated from each other by the convex edges, so that there is a certain gap between the battery cells 2, so as to facilitate the subsequent removal of the battery cells 2.

[0117] In other embodiments, Figure 1 As shown, in the battery pack provided by this embodiment, a buffer is provided between two adjacent battery cells 2. Specifically, the buffer is a buffer foam, which provides a gentle and long-term rebound force for the battery, can accommodate thermal expansion and contraction between the battery cells 2, and meet long-term application needs.

[0118] The disassembly process of the faulty battery cell 2: first, lift up the main body 7 in the sampling structure corresponding to the battery cell 2 to expose the fixing assembly under the main body 7. After removing the fixing assembly, remove the bus 1 connected to the faulty battery cell 2, that is, the faulty battery cell 2 can be taken out without completely destroying the sampling structure.

[0119] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present invention.

Claims

1. A sampling structure, characterized in that: include: A busbar assembly, comprising two rows of busbars (1) arranged at intervals along a second direction, wherein the busbars (1) are connected to terminals of battery cells (2); A collection component (3) comprises a signal collection component and a sampling plate (5), wherein the signal collection component comprises a body (7) and a first connecting member (19), wherein the body (7) is provided in two rows, wherein one row of the body (7) is arranged correspondingly to one row of the busbars (1), and the body (7) is arranged on a side of the busbar component away from a center plane (26) of the battery cell (2) in a second direction; the body (7) is connected to the sampling plate (5) via the first connecting member (19), and the body (7) is connected to the busbar (1) to collect signals from the battery cell (2).

2. The sampling structure according to claim 1, characterized in that: A first area (4) with a vacant center is formed between the side walls of the two rows of busbars (1) that are close to each other.

3. The sampling structure according to claim 2, characterized in that: The sampling plate (5) is arranged in the first area (4) and is located at at least one end of the first area (4) in the first direction.

4. The sampling structure according to claim 3, characterized in that: The number of the sampling plate (5) is one, and the two rows of the bodies (7) are both connected to the sampling plate (5); Alternatively, the number of the sampling plates (5) is two, the two sampling plates (5) are respectively arranged at the two ends of the first area (4) along the first direction, each row of the bodies (7) comprises two first bodies (71) and second bodies (72) arranged along the first direction, the first bodies (71) in the two rows of the bodies (7) are connected to the sampling plates (5) located at the same end as the first bodies (71) along the first direction, and the second bodies in the two rows of the bodies (7) are connected to the sampling plates (5) located at the same end as the second bodies (72) along the first direction.

5. The sampling structure according to claim 2, characterized in that: The sampling plate (5) is arranged in the first area (4), an insulating plate (6) adapted to the sampling plate (5) is arranged in the first area (4), and the sampling plate (5) is arranged on the insulating plate (6).

6. The sampling structure according to claim 5, characterized in that: The insulating plate (6) is provided with a first positioning member (24), and the busbar (1) is provided with a second positioning member (25), and the first positioning member (24) and the second positioning member (25) are adapted to position the insulating plate (6).

7. The sampling structure according to claim 2, characterized in that: The sampling plate (5) is arranged in the first area (4), and the first connecting member (19) is arranged around the busbar (1).

8. The sampling structure according to claim 7, characterized in that: The first connecting member (19) and the body (7) are an integral structure. The first connecting member (19) comprises a first connecting section connected to the body (7) and a second connecting section connected to the first connecting section. The second connecting section is connected to the sampling plate (5). The first connecting section is located on the outside of the bus assembly along the first direction. The second connecting section is located between two rows of the bus bars (1). The first connecting section is folded relative to the body (7), and the second connecting section is folded relative to the first connecting section.

9. The sampling structure according to claim 1, characterized in that: The body (7) is flexibly connected to the busbar (1).

10. The sampling structure according to claim 9, characterized in that: The signal collecting component further comprises a second connecting component (8), the body (7) is connected to the bus bar (1) via the second connecting component (8), and the second connecting component (8) is flexibly connected to the bus bar (1).

11. The sampling structure according to claim 10, characterized in that: The main body (7) and / or the second connecting member (8) are made of flexible material.

12. The sampling structure according to claim 10, characterized in that: It also comprises a third connecting member (20), one end of the third connecting member (20) is connected to the busbar (1), and the other end is flexibly connected to the second connecting member (8), and the third connecting member is a metal conductive sheet.

13. A battery pack, characterized in that: The invention comprises a housing (9), at least one battery assembly arranged in the housing (9) and at least one sampling structure as claimed in any one of claims 1 to 12, wherein the battery assembly comprises a plurality of battery cells (2) arranged along a first direction, the sampling structure is arranged at an end face of the battery assembly away from the housing (9), and a busbar assembly in the sampling structure is connected to a terminal of the battery cell (2).

14. The battery pack according to claim 13, characterized in that: The battery assembly is provided with at least two sampling structures, and the projection of the main body (7) located between the box (9) and the battery assembly at least partially overlaps with the projection of the battery assembly in the third direction; The projection of the main body (7) of the sampling structure located between two adjacent battery components does not overlap with the projection of any of the battery components in the third direction, or at least partially overlaps; and / or, The projections of two bodies (7) in two adjacent sampling structures and close to each other do not overlap in the third direction, or at least partially overlap.

15. The battery pack according to claim 13, characterized in that: The battery assembly is provided with at least two, and the battery pack further comprises: A first fixing assembly (10) is arranged between two adjacent battery assemblies, the first fixing assembly (10) comprising a first pressing plate (11) and a first connecting plate (12), the first pressing plate (11) being pressed on the battery assembly, and the first connecting plate (12) being detachably connected to a fixing beam in the box body (9); The first pressing plate (11) is arranged between the body (7) and the battery assembly in the third direction.

16. The battery pack according to claim 15, characterized in that: The number of the first fixing assembly (10) between two adjacent battery assemblies is one, the first fixing assembly (10) comprising a first connecting plate (12), and two first pressing plates (11) integrally connected to the first connecting plate (12), the two first pressing plates (11) being pressed onto the two adjacent battery assemblies respectively; Alternatively, the number of the first fixing components (10) between two adjacent battery components is two, each of the first fixing components (10) comprises a first connecting plate (12) and a first pressing plate (11) integrally connected to the first connecting plate (12), and the first pressing plates (11) in the two first fixing components (10) are respectively pressed onto the two adjacent battery components.

17. The battery pack according to claim 15, characterized in that: Also includes: A support plate (16) is arranged on a side of the first pressing plate (11) away from the battery cell (2) in the second direction, the support plate (16) and the first pressing plate (11) are arranged flush with each other, and the support plate (16) is used to support the body (7).

18. The battery pack according to claim 13, characterized in that: Also includes: A second fixing assembly (13) is arranged between the battery assembly and the frame of the box body (9), the second fixing assembly (13) comprising a second pressing plate (14) and a second connecting plate (15), the second pressing plate (14) being pressed on the battery assembly, and the second connecting plate (15) being detachably connected to the frame of the box body (9) or a fixing beam inside the box body (9); The second pressing plate (14) is arranged between the body (7) and the battery assembly in the third direction.

19. The battery pack according to claim 14, characterized in that: Also includes: A positioning frame (17) is arranged in the box body (9), and a plurality of positioning grooves (18) are arranged in the positioning frame (17). The positioning grooves (18) are used to clamp the battery monomer (2).

20. The battery pack according to claim 19, characterized in that: A plurality of convex edges are arranged on the inner wall of the positioning frame (17), and two adjacent positioning grooves (18) are separated by the convex edges.

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