Battery pack

Abstract

The utility model provides a battery pack, which belongs to the technical field of battery packs, and comprises a box body, a battery assembly, a sampling assembly and a fixing piece, the battery assembly is arranged in the box body, and the battery assembly comprises a plurality of single batteries which are sequentially arranged along a first direction; the sampling assembly comprises an isolation plate, a bar piece and a signal acquisition piece; the fixing part comprises a pressing plate and a connecting plate, the pressing plate is arranged in the first direction, the connecting plate is arranged on one side, far away from the central surface of the battery single body, of the pressing plate in the second direction, the pressing plate is pressed on the battery assembly, the isolation plate is erected on the pressing plate or the isolation plate and the pressing plate are arranged side by side, and the connecting plate is detachably connected with the box body. Through the arrangement of the fixing piece, a traditional bonding mode is replaced, the battery assemblies are fixed through the cooperation of the pressing plate and the connecting plate, when disassembly is needed, only the connecting plate and the box body need to be separated, then the faulted battery assembly and the corresponding sampling assembly are taken out together to be replaced, and operation is convenient and rapid.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, concretely relates to a battery pack. BACKGROUND

[0002] CTP (cell to pack) scheme is to integrate battery monomer directly into the battery pack, which saves the intermediate module link, improves the space utilization and reduces the battery pack cost.

[0003] At present, the CTP scheme usually directly bonds the battery assembly including a plurality of battery monomers arranged in sequence on the battery box to realize the fixation of the battery assembly or adopts the fixation of the fixing part and the bonding cooperation to realize the fixation of the battery assembly. Among them, for the fixation mode of the fixing part and the bonding cooperation, the fixing part assists the fixation of the battery assembly by pressing, and when installing, the battery assembly is put into the battery box from the opening of the battery box, and the sampling assembly is arranged on the end face of the battery assembly away from the battery box, the isolation plate in the sampling assembly is laid on the surface of the battery assembly, that is, when the fixing part is arranged, the isolation plate is located between the fixing part and the battery assembly, so that the acting force of the fixing part on the battery assembly is easily affected by the isolation plate, and the effective fixation of the battery assembly is difficult to realize, so the bonding fixation is needed. However, the connection mode by bonding is not conducive to taking out the battery assembly from the box, and after the single or several battery monomers in the battery assembly fail, the whole battery pack needs to be replaced, which leads to a large increase in maintenance cost. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects that the battery assembly is bonded on the battery box in the prior art, which leads to inconvenience in replacement and increase in maintenance cost, so as to provide a battery pack.

[0005] In order to solve the above technical problems, the utility model provides a battery pack, which comprises:

[0006] The box body;

[0007] The battery assembly is arranged in the box body, and the battery assembly comprises a plurality of battery monomers arranged in sequence in the first direction;

[0008] The sampling assembly comprises an isolation plate, a baffle and a signal acquisition part, the isolation plate is arranged on the end face of the battery assembly away from the box body in the third direction, the baffle is arranged on the isolation plate, the baffle is connected with the battery monomer, and the signal acquisition part is connected with the baffle;

[0009] The fixing member comprises a pressing plate arranged along a first direction and a connecting plate arranged on a side of the pressing plate away from a center surface of the battery monomer in a second direction, the pressing plate is arranged on the battery assembly, the isolation plate is arranged on the pressing plate or arranged side by side with the pressing plate, the connecting plate is detachably connected with the box, the second direction is perpendicular to the first direction, and a third direction is perpendicular to the second direction and the first direction.

[0010] Optionally, the fixing member further comprises a vertical plate, the pressing plate, the vertical plate and the connecting plate are sequentially connected, the pressing plate and the connecting plate are both horizontal plates, and the vertical plate is a vertical plate.

[0011] Optionally, the battery assembly has a plurality of battery assemblies, and the fixing member is arranged on both sides of each battery assembly.

[0012] Optionally, the battery assembly has a plurality of battery assemblies, and the fixing member is arranged on both sides of each battery assembly.

[0013] Optionally, the box comprises a frame and a fixing beam, and the battery assembly has a plurality of battery assemblies, wherein: the fixing beam is arranged between adjacent two battery assemblies and between the battery assembly and the frame along the second direction, and the connecting plate is detachably connected with the fixing beam; or the fixing beam is arranged between adjacent two battery assemblies along the second direction, the connecting plate between the adjacent two battery assemblies is connected with the fixing beam, and the connecting plate adjacent to the frame is connected with the frame.

[0014] Optionally, the sampling assembly comprises two rows of signal acquisition members and two rows of pads arranged at intervals along the second direction, one row of the signal acquisition members is arranged corresponding to one row of the pads, and the signal acquisition member is arranged on a side of the pad away from the center surface of the battery monomer in the second direction.

[0015] Optionally, the signal acquisition member is a flexible acquisition member.

[0016] Optionally, the isolation plate is arranged side by side with the pressing plate, and the signal acquisition member is detachably connected above the pressing plate.

[0017] Optionally, the isolation plate is arranged on the pressing plate; the isolation plate comprises an isolation plate body and an adjusting part located on both sides of the isolation plate body, the pressing plate, the adjusting part and the signal acquisition member are sequentially arranged, and the adjusting part is detachably connected with the pressing plate.

[0018] Optionally, the signal acquisition member is a flexible acquisition member; the adjusting part is a flexible material, or the adjusting part and the isolation plate body are connected through a flexible member.

[0019] The technical solution of this utility model has the following advantages:

[0020] The battery pack provided by this utility model includes a housing, a battery assembly, a sampling assembly, and a fixing component. The battery assembly is disposed inside the housing and includes multiple battery cells arranged sequentially along a first direction. The sampling assembly includes an isolation plate, a sensor, and a signal acquisition component. The isolation plate is disposed on the end face of the battery assembly away from the housing in a third direction. The sensor is disposed on the isolation plate and connected to the battery cells. The signal acquisition component is connected to the sensor. The fixing component includes a pressure plate and a connecting plate. The pressure plate is disposed along the first direction, and the connecting plate is disposed on the side of the pressure plate away from the center face of the battery cells in a second direction. The pressure plate presses against the battery assembly. The isolation plate is placed on the pressure plate or the isolation plate is arranged side by side with the pressure plate. The connecting plate is detachably connected to the housing. The second direction is perpendicular to the first direction, and the third direction is perpendicular to both the second and first directions.

[0021] The sampling component, located on the end of the battery pack furthest from the housing in a third-direction orientation, connects to individual battery cells to transfer electrical energy, collect signals, and transmit signals. Therefore, the placement of the sampling component must be considered when fixing the battery pack. By placing an isolation plate on a pressure plate or arranging the isolation plate and pressure plate side-by-side, the pressure plate can directly act on the battery pack, effectively pressing and fixing it without the need for adhesive bonding. This invention replaces traditional adhesive bonding with a fixing component. The pressure plate can be directly pressed onto the battery pack, and then the connecting plate is connected to the housing, applying pressure to the entire battery pack. The cooperation of the pressure plate and connecting plate secures the battery pack. When disassembly is required, simply separating the connecting plate from the housing allows for removal of the fixing component. The faulty battery pack and its corresponding sampling component can then be removed and replaced. The operation is convenient and quick, eliminating the need to replace the entire battery pack. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the specific embodiments of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 An exploded view of one embodiment of the battery pack provided in this utility model;

[0024] Figure 2 for Figure 1Partial structure schematic view of fixing part between middle battery assembly and frame;

[0025] Figure 3 For Figure 1 Structure schematic view of fixing part between adjacent two battery assemblies;

[0026] Figure 4 For Figure 1 Partial top view structure schematic view in it;

[0027] Figure 5 For Figure 1 Explosion structure schematic view of sampling assembly in it;

[0028] Figure 6 For Figure 1 Partial structure schematic view of sampling assembly in it;

[0029] Figure 7 Partial structure schematic view of fixing part installation in battery pack provided by the embodiment of the present application.

[0030] Explanation of reference signs:

[0031] 1, box body; 2, battery monomer; 3, sampling assembly; 4, fixing part; 5, pressing plate; 6, connecting plate; 7, isolation plate; 8, gasket; 9, signal acquisition part; 10, adjusting part; 11, vertical plate; 12, center surface. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0034] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "installation", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements.For ordinary skilled in the art, the above-mentioned terms can be understood according to the specific meaning of the utility model.

[0035] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0036] Embodiment 1

[0037] The battery pack provided in the embodiment is fixed by the fixing member, which is convenient for disassembling and replacing the battery assembly compared with the traditional bonding mode.

[0038] As Figures 1 to 6 shown, a specific embodiment of the battery pack provided in the embodiment includes a box body 1, a battery assembly, a sampling assembly 3 and a fixing member 4, the battery assembly is arranged inside the box body 1, the battery assembly includes a plurality of battery monomers 2 arranged in the first direction in turn;The sampling assembly 3 includes an isolation plate 7, a bar sheet 8 and a signal acquisition member 9, the isolation plate 7 is arranged on the end face of the battery assembly away from the box body 1 in the third direction, the bar sheet 8 is arranged on the isolation plate 7, the bar sheet 8 is connected with the battery monomer 2, and the signal acquisition member 9 is connected with the bar sheet 8;The fixing member 4 includes a pressing plate 5 and a connecting plate 6, the pressing plate 5 is arranged in the first direction, the connecting plate 6 is arranged on one side of the central surface 12 of the pressing plate 5 away from the battery monomer 2 in the second direction, the pressing plate 5 is arranged on the battery assembly, the isolation plate 7 is arranged on the pressing plate 5 or the isolation plate 7 is arranged side by side with the pressing plate 5, the connecting plate 6 is detachably connected with the box body 1, the second direction is perpendicular to the first direction, the third direction is perpendicular to the second direction and the third direction is perpendicular to the first direction.

[0039] Wherein, the first direction is the X direction in Figure 1 , the second direction is the Y direction in Figure 1 , and the third direction is the Z direction in Figure 1 .

[0040] Sampling components 3 are configured one-to-one with battery components. Sampling components 3 are located on the end face of the battery component furthest from the housing in a third direction. They connect to individual battery cells 2 to transmit electrical energy, collect signals, and transmit signals. Therefore, the arrangement of the sampling components must be considered when fixing the battery components. By placing the isolation plate 7 on the pressure plate 5 or setting the isolation plate 7 and pressure plate 5 side-by-side, the pressure plate can directly act on the battery component, effectively pressing and fixing it. This invention replaces the traditional adhesive method with the setting of the fixing component 4. The pressure plate 5 can press onto the battery component, and then the connecting plate 6 is connected to the housing 1, applying a clamping force to the entire battery component. The cooperation of the pressure plate 5 and the connecting plate 6 fixes the battery component. When disassembly is required, only the connecting plate 6 and the housing 1 need to be separated, and then the faulty battery component and the corresponding sampling component can be removed and replaced. The operation is convenient and quick, without the need to replace the entire battery pack. It is particularly noteworthy that when the battery component... Figure 1 When the battery pack is placed upright on the bottom plate of the housing 1 (i.e., the terminals in the battery pack are facing upwards), the sampling component 3 is located on the end face of the battery pack away from the housing 1 in a third direction, that is, the sampling component 3 is located on the top surface of the battery pack. When the battery pack is inverted (i.e., the terminals in the battery pack are facing downwards), the corresponding housing 1 is also inverted. At this time, the battery pack is located below the bottom plate of the housing 1, and the sampling component 3 is located on the end face of the battery pack away from the housing 1 in a third direction, that is, the sampling component 3 is located on the bottom surface of the battery pack. In addition, the housing 1 in this application can be the upper housing of the battery pack or the lower housing of the battery pack, and there is no limitation here.

[0041] The pressure plate 5 is positioned along the first direction to press the battery assembly along its long side in that direction. The connecting plate 6 is positioned on the outer side of the pressure plate 5 along the second direction to fix the pressure plate 5 as a whole, thereby ensuring the fixation effect on the battery assembly. Specifically, the sampling component, as an internal electrical connection structure of the battery, integrates the isolation plate 7, the electrode plate 8, and the signal acquisition component 9, realizing the functions of signal acquisition and connection to the battery cell 2. The signal acquisition component 9 and the electrode plate 8 can be connected by welding with nickel or copper sheets.

[0042] One specific embodiment of the fastener 4 is as follows: Figure 2As shown, the fixing member 4 comprises a pressing plate 5, a vertical plate 11 and a connecting plate 6 connected in sequence, the pressing plate 5 and the connecting plate 6 are both horizontal plates, and the vertical plate 11 is a vertical plate, the vertical plate 11 is parallel to the side wall surface of the battery assembly, and the vertical plate 11 can be in contact with the battery assembly or have a gap between the vertical plate 11 and the battery assembly, the vertically arranged vertical plate 11 makes the internal structure more compact, and by arranging the fixing member 4 in a similar "Z" shape, the fixing member 4 has a certain anti-deformation ability, which can buffer the expansion force of the battery monomer 2 applied to the fixing member 4; wherein the material of the fixing member 4 is not limited, which can be steel, aluminum, plastic and the like. It is particularly pointed out that when the fixing member 4 is made of conductive materials such as steel and aluminum, an insulating film or an insulating layer needs to be coated on the surface of the fixing member 4 to make it insulate with the battery assembly and the like.

[0043] In addition, as an alternative embodiment, the vertical plate 11 can also be arranged as an inclined plate according to the arrangement in the box body 1, and the vertical plate 11 has an included angle with the horizontal plane.

[0044] As shown in Figure 1 and Figure 4 , the battery pack provided by the embodiment has a plurality of battery assemblies, and each battery assembly is provided with a fixing member 4 on both sides, and the fixing member 4 is arranged on both sides of each battery assembly to apply force to both sides of the battery assembly, thereby ensuring the stability of the battery assembly in the box body 1.

[0045] Specifically, the plurality of battery assemblies are arranged in sequence along the second direction, and the fixing member 4 is arranged along the first direction to compress the length side of the battery assembly in the first direction, so as to ensure the stability of the battery assembly.

[0046] As shown in Figure 3 , the battery pack provided by the embodiment has two fixing members 4 between the two adjacent battery assemblies, and the connecting plates 6 of the two fixing members 4 are integrally formed, and the whole presents an inverted "several" character structure, which is simple in structure, reduces the space occupation, avoids a large gap between the adjacent battery assemblies, and at this time only one set of fixing holes needs to be provided for fixing the fixing member 4 by means of bolts and the like, thereby simplifying the assembly.

[0047] Specifically, in this embodiment, when it is necessary to take out the battery assembly and the corresponding sampling assembly which have failed, after the connection between each fixing member 4 and the box body 1 is released, all the adjacent battery assemblies, fixing members 4 and sampling assemblies 3 are taken out, and then the battery assembly and the corresponding sampling assembly which have failed are separated by pulling out the fixing member 4 from the side, and the remaining battery assemblies and sampling assemblies 3 can be put back into the battery pack for continuous use. When assembling the battery pack, each fixing member 4 is first placed on each battery assembly, and then each fixing member, each battery assembly and each sampling assembly are put into the battery pack, and then the connecting plate 6 in the fixing member 4 is connected with the box body 1.

[0048] Alternatively, two fixing members 4 of two adjacent battery assemblies can be independently provided. In this case, a set of fixing holes can be formed on each connecting plate 6.

[0049] Specifically, in this embodiment, when the failed battery assembly and the corresponding sampling assembly need to be removed, the fixing member 4, the failed battery assembly and the corresponding sampling assembly 3 can be removed simultaneously after the connection between the fixing member 4 and the box 1 is released, and then the fixing member 4 is pulled out from the side, and the failed battery assembly and the corresponding sampling assembly 3 are replaced. When assembling the battery pack, the fixing member can be first arranged on the battery assembly, and then the fixing member, the battery assembly and the corresponding sampling assembly are placed in the battery pack, and then the connecting plate 6 of the fixing member 4 is connected with the box 1.

[0050] It can be explained that the fixing member 4 is reusable, and only the failed battery assembly and the corresponding sampling assembly can be replaced, and the fixing member 4 can also be replaced synchronously.

[0051] The battery pack provided by the embodiment comprises a box 1 including a frame and a fixing beam, the fixing beam is arranged between adjacent two battery assemblies and between the battery assembly and the frame along the second direction, and the connecting plate 6 is detachably connected with the fixing beam.

[0052] Specifically, the fixing beam is a mounting protrusion in the box 1, for example, the fixing beam is a cross beam, a side beam or a longitudinal beam, etc., which is not limited here, a through hole can be formed on the fixing beam, during the mounting process, the fixing hole of the connecting plate 6 of the fixing member 4 is corresponded with the through hole of the fixing beam, and the connecting plate 6 is stacked in the third direction shown in the figure, and then the fastener such as bolt and nut is used to complete the fixing of the connecting plate 6 and the fixing beam. Figure 1

[0053] Alternatively, the fixing beam is arranged only between adjacent two battery assemblies along the second direction, the connecting plate 6 between the adjacent two battery assemblies is connected with the fixing beam, and the connecting plate 6 adjacent to the frame is connected with the corresponding frame.

[0054] Specifically, a mounting hole is formed on the frame of the box 1 adjacent to the connecting plate 6, during the mounting process, the fixing hole of the connecting plate 6 of the fixing member 4 is corresponded with the mounting hole on the frame, and the connecting plate 6 is stacked in the third direction shown in the figure, and then the fastener such as bolt and nut is used to complete the fixing of the connecting plate 6 and the frame. Figure 1

[0055] For example, the fixing member 4 is arranged on the battery assembly, and then the fixing member, the battery assembly and the corresponding sampling assembly are placed in the battery pack, and then the connecting plate 6 of the fixing member 4 is connected with the box 1. Figure 3 ​​As shown, the battery pack provided in this embodiment includes a sampling component comprising two rows of signal acquisition elements 9 and two rows of sampling plates 8 spaced apart along a second direction. One row of signal acquisition elements 9 is correspondingly arranged with one row of sampling plates 8, and the signal acquisition elements 9 are located on the side of the sampling plate 8 away from the center surface 12 of the battery cell 2 in the second direction. That is, each battery assembly is provided with two rows of sampling plates 8 and two rows of signal acquisition elements spaced apart along the second direction.

[0056] The signal acquisition component 9 is located on the outside of the battery pack 8, making disassembly during battery pack repair easier and faster. After removing the faulty battery assembly, it can be further disassembled to remove the faulty battery cell 2, allowing for the reuse of other parts of the battery assembly. Specifically, when the signal acquisition component 9 is located outside the battery pack 8, it is easier to disconnect the connection between the signal acquisition component 9 and the battery pack 8, reducing the risk of damage to the signal acquisition component 9. After disconnecting the signal acquisition component 9 from the battery pack 8, the connection between the battery pack 8 and the battery cell 2 can be further disconnected. The faulty battery cell 2 can then be removed from below the battery assembly and replaced with a new battery cell 2. Since disconnecting the connection between the battery pack 8 and the battery cell 2 may damage the battery pack 8, a new battery pack 8 must be installed simultaneously. Connecting the new battery pack 8 and the new battery cell 2 forms a new battery assembly, which can then be reused in the battery pack. It is important to note that the connection that needs to be disconnected is the battery pack 8 connected to the faulty battery cell 2.

[0057] Specifically, the signal acquisition component 9 is a flexible acquisition component. The flexible acquisition component is designed to bend easily, so that the signal acquisition component 9 can be bent first when removing the fixing component 4, thus avoiding scratching or damaging the signal acquisition component 9 during the removal of the fixing component 4.

[0058] like Figure 7 As shown, in the battery pack provided in this embodiment, the pressure plate 5 and the isolation plate 7 are arranged side by side, and the signal acquisition component 9 is detachably connected to the top of the pressure plate 5.

[0059] Specifically, the pressing plate 5 is arranged between the battery assembly and the signal collecting piece 9, the size of the isolation plate 7 is adapted to the arrangement of the gasket 8, and the projection of the isolation plate 7 and the pressing plate 5 in the plane formed by the first direction and the second direction is not overlapped, and the pressing plate 5 is directly in contact with the signal collecting piece 9. Since the pressing plate 5 and the isolation plate 7 are located in the same plane, the occupied space in the third direction can be saved at the same time. In addition, when the signal collecting piece 9 is a flexible collecting piece, when the failed battery assembly and the corresponding sampling assembly need to be taken out, after the connection between the fixing piece 4 for fixing the failed battery assembly and the box 1 is released, the fixing piece 4 can be taken out by bending the signal collecting piece 9 first, and then the failed battery assembly and the corresponding sampling assembly are taken out, which is more simple and convenient to operate. And the pressing plate 5 and the signal collecting piece 9 are detachably connected, which can realize stable installation of the signal collecting piece 9, and facilitate separate disassembly and replacement or reuse of the fixing piece 4. Specifically, the pressing plate 5 and the signal collecting piece 9 can be connected by buckling or gluing, or can be simply overlapped.

[0060] In another embodiment, as shown in FIG. 1, the battery pack provided by the embodiment includes a pressing plate 5, a gasket 8, a signal collecting piece 9, and an isolation plate 7. Figure 2 The isolation plate 7 is arranged on the pressing plate 5; the isolation plate 7 includes an isolation plate body and an adjusting part 10 located on both sides of the isolation plate body, the pressing plate 5, the adjusting part 10 and the signal collecting piece 9 are arranged in sequence, and the adjusting part 10 is detachably connected with the pressing plate 5.

[0061] Specifically, the adjusting part 10 and the signal collecting piece 9 can only be in contact, or can be fixed by hot riveting or the like; the pressing plate 5 and the adjusting part 10 can be connected by buckling or adhesion in a detachable manner, which is stable and convenient to disassemble. In addition, as an alternative embodiment, the pressing plate 5 and the adjusting part 10 can only be in contact without connection. The material of the isolation plate body and the adjusting part 10 is not limited, which can only achieve the insulation function. By arranging the adjusting part 10 between the pressing plate 5 and the signal collecting piece 9, the insulation effect of the signal collecting piece 9 can be improved, and when the fixing piece 4 is taken out, the signal collecting piece 9 can be prevented from being scratched or damaged during the process of taking out the fixing piece 4.

[0062] The battery pack provided by the embodiment has the adjusting part 10 made of flexible material, which can be made of polyester material or polyimide material, and the specific material type of the flexible material is not limited, and the adjusting part 10 on both sides of the isolation plate body can be bent relative to the isolation plate body. The signal collecting part 9 is a flexible collecting part, so when the faulty battery assembly and the corresponding sampling assembly need to be taken out, after the connection between the fixing part 4 for fixing the faulty battery assembly and the box 1 is released, the signal collecting part 9 and the adjusting part 10 can be bent, the fixing part 4 is taken out first, and then the faulty battery assembly and the corresponding sampling assembly are taken out, which is more simple and convenient to operate, and can better avoid scratching and damaging the signal collecting part 9 in the process of taking out the fixing part 4. It should be noted that the bending angle is not limited in the present application, and the signal collecting part 9 can be damaged when the fixing part 4 is taken out after being bent.

[0063] In addition, as an alternative embodiment, the adjusting part 10 is connected to the isolation plate body through a flexible part. Specifically, the connection can be made through a structure made of flexible material, or the connection between the adjusting part 10 and the isolation plate body can be at least partially thinned; the structure of the specific flexible part is not limited, and the adjusting part 10 on both sides of the isolation plate body can be bent relative to the isolation plate body.

[0064] Specifically, Figure 1 The box 1 is a lower box, and the battery pack further includes an upper box. When the battery pack is disassembled, the upper box and the lower box are first separated, the connection between the connecting plate 6 of the fixing part 4 for fixing the faulty battery assembly and the box 1 is released, the signal collecting part 9 and the adjusting part 10 are folded, the fixing part 4 is taken out, then the faulty battery assembly and the corresponding sampling assembly 3 are taken out, and finally the faulty battery monomer 2 is taken out from the battery assembly. Specifically, the connection between the connection point between the gasket 8 connected to the faulty battery monomer 2 and the terminal and the connection point between the gasket 8 and the signal collecting part 9 is released (the welding point is removed), then the faulty battery monomer 2 and the corresponding gasket 8 are taken out, and new battery monomer 2 and new gasket 8 are replaced, and finally corresponding welding connection is performed.

[0065] Specifically, the signal collecting piece 9 can be one of FPC, FFC and FDC to realize the bendable. Wherein, the FPC is a flexible printed circuit board which is made of polyimide or polyester film as a substrate, has high reliability, excellent flexibility, high wiring density, light weight, thin thickness, good bending characteristics, and saves the connection work of the excess cable; the FFC is a flexible flat cable which is made of polyester material as a substrate, has good flexibility, foldable and bendable, thin thickness, small volume, simple connection, convenient disassembly, easy to solve electromagnetic shielding and other advantages; the FDC is a flexible die-cutting circuit board which is made of polyimide or polyester film substrate through die-cutting process, has high reliability and flexibility, can be freely bent, folded, wound and moved.

[0066] In addition, as an alternative embodiment, the sampling assembly is provided with two rows of the bar sheets 8 and one row of the signal collecting pieces 9, and the signal collecting piece 9 is arranged between the two rows of the bar sheets 8 and connected with the two rows of the bar sheets 8. Of course, two rows of the signal collecting pieces 9 can also be arranged between the two rows of the bar sheets 8, and the two rows of the signal collecting pieces 9 are respectively connected with the two rows of the bar sheets 8. In this embodiment, the isolation plate 7 can be arranged in the same way as described above, and will not be described here. Since the signal collecting piece 9 is arranged directly above the middle of the isolation plate 7, the signal collecting piece 9 and the fixing piece 4 will not interfere with each other, therefore, preferably, the isolation plate 7 is arranged side by side with the pressing plate 5 to save the space occupied in the third direction.

[0067] Obviously, the above embodiments are only examples for clearly illustrating, but not limit the embodiments. For those skilled in the art, based on the above description, other different forms of changes or variations can also be made. Here, it is not necessary and impossible to enumerate all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A battery pack, characterized by, The application relates to a battery pack, which comprises: a box (1); a battery assembly arranged inside the box (1), the battery assembly comprising a plurality of battery monomers (2) arranged in sequence along a first direction; a sampling assembly (3) comprising an isolation plate (7), a baffle (8) and a signal acquisition piece (9), the isolation plate (7) being arranged on an end surface of the battery assembly away from the box (1) in a third direction, the baffle (8) being arranged on the isolation plate (7), the baffle (8) being connected with the battery monomer (2), and the signal acquisition piece (9) being connected with the baffle (8); a fixing piece (4) comprising a pressing plate (5) and a connecting plate (6), the pressing plate (5) being arranged along the first direction, the connecting plate (6) being arranged on one side of the pressing plate (5) away from a center surface (12) of the battery monomer (2) in a second direction, the pressing plate (5) being arranged on the battery assembly, the isolation plate (7) being arranged on the pressing plate (5) or being arranged side by side with the pressing plate (5), the connecting plate (6) being detachably connected with the box (1), the second direction being perpendicular to the first direction, and the third direction being perpendicular to the second direction and perpendicular to the first direction.

2. The battery pack of claim 1, wherein, The fixing piece (4) comprises a vertical plate (11), the pressing plate (5), the vertical plate (11) and the connecting plate (6) being connected in sequence, the pressing plate (5) and the connecting plate (6) being horizontal plates, and the vertical plate (11) being a vertical plate.

3. The battery pack of claim 1, wherein, The battery assembly has a plurality of battery assemblies, and each battery assembly is provided with the fixing piece (4) on both sides in a second direction.

4. The battery pack of claim 1, wherein, The battery assembly has a plurality of battery assemblies, and the connecting plates (6) of the fixing pieces (4) between two adjacent battery assemblies are integrally arranged.

5. The battery pack of claim 1, wherein, The box (1) comprises a frame and a fixing beam, the battery assembly has a plurality of battery assemblies, and the fixing beam is arranged between two adjacent battery assemblies and between the battery assembly and the frame in the second direction, the connecting plate (6) is detachably connected with the fixing beam, or the fixing beam is arranged between two adjacent battery assemblies in the second direction, the connecting plate (6) between the two adjacent battery assemblies is connected with the fixing beam, and the connecting plate (6) adjacent to the frame is connected with the frame.

6. The battery pack of claim 1, wherein, The sampling assembly comprises two rows of signal acquisition pieces (9) and two rows of baffles (8) arranged at intervals in the second direction, one row of the signal acquisition pieces (9) is arranged correspondingly to one row of the baffles (8), and the signal acquisition piece (9) is arranged on one side of the baffle (8) away from the center surface (12) of the battery monomer (2) in the second direction.

7. The battery pack of claim 6, wherein, The signal acquisition piece (9) is a flexible acquisition piece.

8. The battery pack of claim 6, wherein, The isolation plate (7) is arranged side by side with the pressing plate (5), and the signal acquisition piece (9) is detachably connected above the pressing plate (5).

9. The battery pack of claim 6, wherein, The isolation plate (7) is arranged on the pressing plate (5); the isolation plate (7) comprises an isolation plate body and an adjusting part (10) arranged on both sides of the isolation plate body; the pressing plate (5), the adjusting part (10) and the signal acquisition part (9) are arranged in sequence; and the adjusting part (10) is detachably connected with the pressing plate (5).

10. The battery pack of claim 9, wherein, The signal acquisition part (9) is a flexible acquisition part; the adjusting part (10) is made of a flexible material, or the adjusting part (10) and the isolation plate body are connected through a flexible part.

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