Sampling structure and battery pack

Abstract

The utility model 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 utility model relates to the technical field of batteries, in particular to a sampling structure and a battery pack. Background Art

[0002] The sampling structure is a crucial component of the battery pack, used to monitor the voltage and temperature of the battery cells in real time. Traditionally, the sampling structure consists of an isolator, a busbar, and a signal acquisition unit. The isolator is positioned on the top surface of the battery pack. The busbars are located on either side of the isolator and are used to weld the battery cell terminals. The signal acquisition unit is located in the center of the isolator. The battery pack consists of several 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 removed, since the isolation plate in the sampling structure covers the side where the terminal of the battery cell is welded to the bus bar, 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 bar 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. Utility Model Content

[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, the busbars being connected to terminals of the battery cells;

[0008] A collection assembly, comprising a signal collection member and a sampling plate, wherein the signal collection member comprises a body and a first connecting member, wherein the bodies are provided in two rows, one row of the bodies being arranged correspondingly to one row of the busbars, and the bodies being arranged on a side of the busbar assembly away from a center 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 from the battery cells.

[0010] Optionally, a first area with a central vacancy is formed between the side walls of the 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, and each row of the bodies includes two first bodies and a second body arranged along the first direction, and the first bodies in the two rows of 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 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 and the body are an integral structure, 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 and the body 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.

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

[0019] Optionally, the signal collecting member further comprises a second connecting member, the body is connected to the busbar via the second connecting member, and the second connecting member (8) is flexibly connected to the busbar (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 the end face of the battery assembly away from the box body, and the busbar assembly in the sampling structure is connected to the terminals of the battery cells.

[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 that are 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, disposed between two adjacent battery assemblies, comprising a first pressing plate and a first connecting plate, wherein the first pressing plate is pressed against the battery assembly, and the first connecting plate is detachably connected to the fixing beam in the box;

[0028] The first pressing plate is arranged 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 the 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, disposed 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 onto the battery assembly, and the second connecting plate being detachably connected to the box frame or a fixing beam inside the box;

[0033] The second pressing plate is arranged 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. A plurality of positioning grooves are arranged in the positioning frame. 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 this utility model has the following advantages:

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

[0039] By positioning the main body of the acquisition assembly on the side of the busbar assembly away from the center plane of the battery cells in the second direction, that is, on the outside of the busbar assembly, and eliminating the traditional isolation plate, the battery cells are no longer subject to interference from the isolation plate and the main body of the signal acquisition assembly during removal. Specifically, if a battery cell fails, the connection between the busbar and the terminal on that battery cell is disconnected, allowing the faulty battery cell to be removed independently without disassembling the remaining sampling structures. This simplified disassembly method significantly improves the efficiency of battery cell repair. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0041] Figure 1 This is a schematic structural diagram of an implementation scheme of the sampling structure provided in Example 1 of the present utility model;

[0042] Figure 2 A schematic structural diagram of another embodiment of the sampling structure provided in Example 1 of the present utility model;

[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 Example 2 of the present utility model;

[0045] Figure 5 A schematic diagram of an exploded structure of another embodiment of the battery pack provided in Example 2 of the present utility model;

[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 positioning framework in .

[0049] Description of reference numerals:

[0050] 1. Busbar; 2. Battery cell; 3. Collection assembly; 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 assembly; 11. First pressure plate; 12. First connecting plate; 13. Second fixing assembly; 14. Second pressure 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 following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0052] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on 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 for battery management system (BMS) transmission. It is mainly composed of signal acquisition components, isolation plates, and busbars, and is used to achieve electrical connection between battery cells in the battery pack. Due to the layout of the signal acquisition components and the presence of isolation plates, the traditional sampling structure must be completely disassembled before the battery cells in the battery pack need to be removed. This not only reduces repair efficiency but also makes it difficult to maintain.

[0057] The sampling structure provided in this embodiment no longer has an isolation plate as 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. The signal collection component includes a body 7 and a first connecting member 19. The body 7 is provided with two rows, and one row of the body 7 is arranged corresponding to one row of the bus bars 1. The body 7 is arranged on the side of the bus assembly away from the center plane 26 of the battery cells 2 in the second direction; the body 7 is connected to the sampling board 5 through the first connecting member 19, and the 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 By arranging the main body 7 on the outside of the busbar assembly and eliminating the traditional isolation plate, the battery cells 2 are no longer interfered with by the isolation plate and the main body 7 in the signal acquisition unit when being removed. When one of the battery cells 2 fails, the connection between the busbar 1 and the terminal on the battery cell 2 is disconnected, and the failed battery cell 2 can be removed separately without disassembling the remaining sampling structures. This simplifies the disassembly method and greatly improves the efficiency of repairing the battery cells 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 and has high reliability and excellent flexibility. It has the characteristics of high wiring density, light weight, thin thickness, and good bendability, eliminating the need for redundant wiring connection work; FFC is a flexible flat cable, which is made of PET-based insulating hot-melt adhesive tape and extremely thin tinned flat copper wire, pressed together through an automated equipment production line. It has the advantages of good flexibility, foldability, thin thickness, small size, simple connection, easy disassembly, and easy solution to 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. It 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 PCB (Printed Circuit Board), which is responsible for collecting the 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. It 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, to facilitate timely cutting off the circuit between the battery cell and the load, thereby reducing losses.

[0062] Specifically, if Figure 1 As shown, the sampling plate 5 and the body 7 are connected via a first connecting piece 19 . 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 comprises two rows of busbars 1, wherein the two rows of busbars 1 are spaced apart along a first direction. Specifically, by spacing one row of busbars 1 from the other row of busbars 1, the busbars 1 are connected to the terminals of the battery cells 2; a first region 4 with a central vacant portion is formed between the adjacent sidewalls of the two rows of busbars 1.

[0065] It can be explained that, for the first area 4: since a sampling structure without an isolation plate is adopted 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 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, which can be provided 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 main body 7 of the signal acquisition component in the sampling structure is located on the outside of the bus assembly, an empty first area 4 is formed between the two rows of bus bars 1 close to each other and the side wall surface. At this time, the explosion-proof valve of the battery cell 2 is just 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 maintain effective operation 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] In traditional sampling structures, the sampling plate is placed within the battery pack's electrical compartment, occupying some of the compartment's space. Therefore, in this embodiment, by placing the sampling plate 5 within the first region 4, the electrical compartment's structure is made more compact, thereby increasing the space within the battery pack and, consequently, the battery pack's energy density. Furthermore, placing the sampling plate 5 at the end of the first region 4 minimizes the size of the first connector 19, reducing the area 4 occupied by the first connector 19 and improving heat dissipation.

[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 one 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, one at each end of the first region 4 along the first direction. Each row of bodies 7 includes two first bodies 71 and two second bodies 72 arranged along the first direction. The first bodies 71 in the two rows of bodies 7 are connected to the sampling plate 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 plate 5 located at the same end as the second bodies 72 along the first direction. For a battery pack composed of a large number of battery cells 2, as the number of battery cells 2 increases, the corresponding transmission lines in the body 7 also need to increase, and thus the width of the body 7 needs to be increased. In addition, the path connecting the battery cells 2 at the far end to the sampling plate 5 via the transmission line of the body 7 also becomes longer, ultimately affecting the overall performance of the battery pack. In the present application, one sampling structure corresponds to two sampling plates 5, and a row of bodies 7 is divided 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 set close to the first body 71, and the second body 72 in the two rows of bodies 7 is connected to the sampling plate 5 set close to the second body 72, so that the transmission path of the body 7 can be shortened, and the transmission line contained 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 by this embodiment, an insulating plate 6 adapted to the sampling plate 5 is provided in the first area 4 , and the sampling plate 5 is provided on the insulating plate 6 .

[0074] The sampling plate 5 and the battery assembly are isolated by the provision of the insulating plate 6, which provides higher safety. Specifically, the insulating plate 6 is adapted to the sampling plate 5, meaning that the size of the insulating plate 6 only needs to be provided in the area where the sampling plate 5 is located, without occupying the first area 4 at other locations.

[0075] like Figure 2 As shown, in the sampling structure provided by 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 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 bus bar 1. This arrangement allows the first connecting member 19 to be connected to the sampling plate 5 without crossing the bus bar 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 the two rows of buses 1.

[0080] In a preferred embodiment, the first connector 19 and the body 7 are integrally formed, with the first connecting section folded relative to the body, and the second connecting section folded relative to the first connecting section. In this embodiment, when the first and second connecting sections of the first connector 19 are not folded, the first connector 19 and the body 7 are arranged linearly. This can be achieved by simply folding the existing body 7 and first connector 19, without requiring any special modifications to the existing signal acquisition component structure.

[0081] In an alternative embodiment, the first connecting member 19 and the body 7 can be arranged in a "U"-shaped structure in an unfolded state, and 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 connecting member 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 connecting member 19 partially overlaps with the projection of the bus 1 in the third direction. By adopting this embodiment, the size of the first connecting member 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 a 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. Because the main body 7 of the sampling structure is located on the side away from the center plane of the battery cell 2, and in order to ensure 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 of the sampling structure will interfere with the removal of the fixing assembly, resulting in a flexible connection between the main body 7 and the bus 1. That is, the main body 7 can be lifted during the removal of the fixing assembly, facilitating the removal of the fixing assembly.

[0085] Preferably, the body 7 is made of a flexible material to achieve a flexible connection between the body 7 and the busbar 1. This arrangement allows the body 7 to be lifted directly, facilitating the removal of the fixed components and subsequent removal of the faulty battery cell 2. Exemplarily, the body 7 is any of an FPC, FFC, or FDC.

[0086] like Figures 1 to 3 As shown, in the sampling structure provided in this embodiment, the signal acquisition component further includes a second connecting member 8, through which the body 7 is connected to the bus 1. The second connecting member 8 and the bus 1 are connected in a flexible manner. The flexible connection between the second connecting member 8 and the bus 1 enables the second connecting member 8 to bend relative to the bus 1, thereby enabling the body 7 to be lifted.

[0087] Preferably, the second connecting member 8 is made of a flexible material to achieve a flexible connection between the bus bars 1 of the second connecting member 8; due to its flexible nature, it can be bent, and the main body 7 can be lifted by the second connecting member 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 busbar 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 busbar 1 are connected via 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 busbar 1. The flexible connection between the third connector 20 and the second connector 8 allows the second connector 8 to bend relative to the busbar 1. The flexible connection between the third connector 20 and the second connector 8 is also achieved by making the second connector 8 of a flexible material.

[0089] The second connector 8 and the body 7, as well as the second connector 8 and the third connector 20, are connected via solder pads. The solder pads provide both electrical connection and mechanical fixation, ensuring a reliable connection. They also provide low-impedance and low-noise paths, ensuring efficient signal and power transmission and minimizing signal attenuation and interference. Specifically, the solder pads can be circular, square, or rectangular, and the corresponding pads are soldered together to complete the connection. The solder pads facilitate individual disassembly.

[0090] A preferred embodiment, such as Figure 3 As shown, a temperature detection member 21 can be provided on the third connecting 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 with 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 passes through the bus 1 and contacts the battery cell 2. Generally, several battery cells 2 are selected for temperature detection.

[0092] Example 2

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

[0094] In this embodiment, one battery assembly corresponds to one sampling structure. By applying the sampling structure in Example 1, 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.

[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 main body 7 of the sampling structure 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 the battery assembly and the battery assembly does not overlap with the projection of the battery assembly in the third direction, or at least partially overlaps.

[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 from 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 assemblies, its projection with the battery assemblies in the third direction can be in three situations: non-overlapping, complete overlapping, and partial overlapping. The non-overlapping situation helps reduce the electromagnetic interference of the battery assemblies on the main body 7 and prevents the main body 7 from interfering with the removal of the battery cells 2 when the battery cells 2 are disassembled. The complete and partial overlapping situations also reduce the distance that the main body 7 extends from the battery assemblies in the second direction, thereby preventing the main body 7 from extending too far in the second direction. This requires additional space between adjacent battery assemblies to accommodate the extended distance of the main body 7, thus reducing the distance between adjacent battery assemblies and making the battery pack structure more compact.

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

[0099] For the case where the projections of the two main bodies 7 at least partially overlap in the third direction, it includes two cases: 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, and then when the battery cell 2 is disassembled, the main body 7 affects the removal of the battery cell 2.

[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 can help 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. The first fixing component 10 includes a first pressure plate 11 and a first connecting plate 12. The first pressure 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 pressure plate 14 and a second connecting plate 15. The second pressure 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 pressure plate 11 and the second pressure 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 body 9. The battery assembly no longer needs to be connected to the box body 9 by gluing, so the battery assembly is fixed relative to the box body 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 removed by simply separating the connecting plate and the box body 9. 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, and the faulty battery cell 2 can be removed 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 to press the long side of the battery assembly, which has a good stabilizing effect.

[0103] In addition, since the supporting parts of the first pressure plate 11 and the second pressure 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 embodiment 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 pressure plates 11 integrally connected to the first connecting plate 12, and the two first pressure plates 11 are respectively pressed on the two adjacent battery assemblies. That is, the two first pressure plates 11 share one first connecting plate 12, which has a simple structure, reduces space occupancy, and avoids large gaps between adjacent battery assemblies. For example, the integrally formed structure can be an inverted "X"-shaped structure; wherein, the horizontally arranged first pressure 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 embodiment of the first fixing component 10 can be 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, which is positioned outside the battery assembly, ensuring its stability. The support plate 16 and the first or second pressure plate 11, 14 jointly support the body 7, providing a larger support area and improved support effectiveness. Specifically, the support plate 16 and the pressure plate or riser are detachably connected, optionally using a snap-on design 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, further improving 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 on the inside and are coated with an insulating film or an insulating layer on the 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 may be supported only by the first pressing plate 11 and the second pressing plate 14 .

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

[0113] Between two adjacent battery assemblies, a support plate 16 is provided between the 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 . The positioning frame 17 is disposed in the box body 9 . A plurality of positioning grooves 18 are disposed in the positioning frame 17 . 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 to facilitate the individual fixation of the battery cell 2.

[0116] Specifically, the inner wall of the positioning frame 17 is provided with a plurality of protrusions, which separate adjacent positioning grooves 18. Therefore, the battery cells 2 are also separated from each other by the protrusions, leaving a certain gap between the battery cells 2, thereby facilitating the subsequent removal of the battery cells 2.

[0117] In other embodiments, Figure 1 As shown, the battery pack provided in this embodiment has a buffer member disposed between two adjacent battery cells 2. Specifically, the buffer member is a buffer foam that provides a gentle and long-lasting 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 located below 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 clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain 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) spaced apart 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 corresponding 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 central vacancy 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 both rows of the bodies (7) are connected to the sampling plate (5); Alternatively, the number of the sampling plates (5) is two, and the two sampling plates (5) are respectively arranged at the two ends of the first area (4) along the first direction, and each row of the bodies (7) includes two first bodies (71) and two second bodies (72) arranged along the first direction, and 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: 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).

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) includes 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 outside the bus assembly along the first direction. The second connecting section is located between two rows of 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 member (8), the body (7) is connected to the busbar (1) via the second connecting member (8), and the second connecting member (8) is flexibly connected to the busbar (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 includes a third connecting member (20), one end of which is connected to the busbar (1), and the other end of which 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 box (9), at least one battery assembly arranged in the box (9) and at least one sampling structure according to 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 on an end face of the battery assembly away from the box (9), and a bus assembly in the sampling structure is connected to a terminal of the battery cell (2).

14. The battery pack according to claim 13, wherein: The battery assembly is provided with at least two, and the projection of the body (7) of the sampling structure 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, wherein: The battery pack includes at least two battery assemblies, and the battery pack further includes: a first fixing assembly (10) disposed 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 onto the battery assemblies, and the first connecting plate (12) being detachably connected to a fixing beam within the box (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 respectively pressed onto the two adjacent battery assemblies; Alternatively, the number of the first fixing assemblies (10) between two adjacent battery assemblies is two, each of the first fixing assemblies (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 assemblies (10) are respectively pressed onto the two adjacent battery assemblies.

17. The battery pack according to claim 15, characterized in that: Also includes: A support plate (16) is provided 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 provided flush with each other. The support plate (16) is used to support the body (7).

18. The battery pack according to claim 13, wherein: Also includes: A second fixing assembly (13) is arranged between the battery assembly and the frame of the box (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 onto the battery assembly, and the second connecting plate (15) being detachably connected to the frame of the box (9) or a fixing beam inside the box (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, wherein: 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, wherein: 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.

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