Battery sampling assembly and battery pack

Abstract

A battery sampling assembly (100) and a battery pack (200), which relate to the technical field of batteries. The battery sampling assembly (100) comprises metal sampling strips (110) and an insulating film (150), wherein each metal sampling strip (110) comprises a body (111), and a first end portion (113) and a second end portion (115) which are arranged at two ends of the body (111), the first end portion (113) being configured to be electrically connected to a busbar (220), and the second end portion (115) being configured to be electrically connected to a circuit board (230); and the insulating film (150) covers the bodies (111) of the metal sampling strips (110). The battery sampling assembly (100) has a simple structure, is convenient for collecting information of the battery pack (200), and is low in cost.

Description

Battery sampling kit and battery pack

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application number 2022108407400, filed with the Chinese Patent Office on July 18, 2022, and entitled “Battery Sampling Assembly and Battery Pack,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular to a battery sampling assembly and a battery pack. Background Art

[0004] Existing battery cells all have poles on different sides of the cell, and the poles on both sides need to be transferred to the same side to facilitate the collection of battery pack information. Among the existing transfer methods, most use wire harness transfer and flexible circuit board transfer. Among them, if wire harness transfer is used, the structure is complex, the wire harnesses are numerous, the connection efficiency is low, and it is easy to have wire harness short circuits or missing connections. If flexible circuit board transfer is used, two transfers are required, the structure is complex, the connection efficiency is low, and the cost is high. In other words, the existing transfer structure is complex, the connection efficiency is low, and the cost is high.

[0005] Application Contents

[0006] The objectives of the present disclosure include, for example, providing a battery sampling assembly and a battery pack, which can simplify the sampling structure and reduce costs.

[0007] The embodiments of the present disclosure may be implemented as follows:

[0008] In a first aspect, the present disclosure provides a battery sampling assembly, comprising:

[0009] A metal sampling piece, comprising a body and a first end and a second end provided at both ends of the body, wherein the first end is configured to be electrically connected to a bus bar, and the second end is configured to be electrically connected to a circuit board;

[0010] An insulating film covers the body of the metal sampling piece.

[0011] In an optional embodiment, the ratio of the width to the thickness of the metal sampling piece is 10 to 100.

[0012] In an optional embodiment, the thickness of the metal sampling sheet is greater than or equal to 0.05 mm.

[0013] In an optional embodiment, the body includes a first surface and a second surface that are opposite to each other, and the insulating film covers the first surface and the second surface respectively.

[0014] In an optional embodiment, the thickness of the insulating film is 0.03 mm to 0.5 mm.

[0015] In an optional embodiment, the body further includes side surfaces, the side surfaces respectively connecting the first surface and the second surface, and the side surfaces are provided with the insulating film.

[0016] In an optional embodiment, the first surface is provided with a layer of the insulating film, the second surface is provided with a layer of the insulating film, and the two layers of the insulating film on both sides of the first surface and the second surface are press-fitted and connected at the side surfaces.

[0017] In an optional embodiment, a through hole is opened in the insulating film.

[0018] In an optional embodiment, the through hole is located between two adjacent metal sampling sheets.

[0019] In an optional embodiment, the insulating film located on one side of the first surface is provided with a through hole, and the insulating film located on one side of the second surface is provided with a through hole, and the through holes on both sides are correspondingly arranged or staggered.

[0020] In an optional embodiment, the lengths of the first end portion and the second end portion are respectively greater than or equal to 5 mm.

[0021] In an optional embodiment, the metal sampling piece is provided with a buffer section, and the buffer section can adjust the length of the metal sampling piece.

[0022] In an optional embodiment, the first end portion and the second end portion are respectively provided with a straight section, and the length of the straight section is greater than or equal to 3 mm.

[0023] In an optional embodiment, the buffer section is provided on at least one of the first end portion, the second end portion and the main body.

[0024] In an optional embodiment, the buffer section is arranged on the first end and the second end, and the buffer section includes a first segment and a second segment connected to each other, and the first end and the second end are respectively provided with a straight section; the first segment is connected to the main body, and the second segment is connected to the straight section.

[0025] In an optional embodiment, the buffer section is provided on the main body, and the buffer section includes a first arc portion and a second arc portion connected to each other, and the first arc portion and the second arc portion are recessed in opposite directions.

[0026] In an optional embodiment, the metal sampling sheet and the insulating film are fixed by colloid bonding.

[0027] In an optional embodiment, the number of the metal sampling pieces includes multiple pieces, and the distance between two adjacent metal sampling pieces is greater than or equal to 2 mm.

[0028] In a second aspect, the present disclosure provides a battery pack, comprising:

[0029] Multiple battery cells;

[0030] busbars, the busbars being disposed on both sides of the battery core and electrically connected to the plurality of battery cores respectively;

[0031] A circuit board is provided on one side of the battery cell; a busbar located on the same side of the battery cell as the circuit board is electrically connected to the circuit board;

[0032] At least one battery sampling assembly according to any one of the preceding embodiments; wherein the first end is electrically connected to the bus bar on a side away from the circuit board; and the second end is electrically connected to the circuit board.

[0033] In an optional embodiment, the first end portion of the metal sampling piece is welded to the busbar.

[0034] The beneficial effects of the embodiments of the present disclosure include, for example:

[0035] The battery sampling assembly provided by the embodiment of the present disclosure includes a metal sampling piece and an insulating film provided on the metal sampling piece. The two ends of the metal sampling piece are electrically connected to the bus and the circuit board respectively, so that the sampling of the battery cell can be realized. The structure is simple, the metal sampling piece is easy to install and position, the connection is convenient, and the cost is low.

[0036] The battery pack provided by the embodiment of the present disclosure includes the above-mentioned battery sampling assembly, and has a simple sampling structure, which facilitates the assembly of the battery pack and is conducive to improving sampling efficiency and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0038] FIG1 is a schematic diagram of the exploded structure of a battery pack provided in an embodiment of the present disclosure;

[0039] FIG2 is a schematic structural diagram of a battery sampling assembly provided in an embodiment of the present disclosure;

[0040] FIG3 is a schematic diagram of a first structure of a metal sampling sheet provided by an embodiment of the present disclosure;

[0041] FIG4 is a schematic diagram of a first structure of a buffer section of a metal sampling sheet provided by an embodiment of the present disclosure;

[0042] FIG5 is an exploded schematic diagram of a first structure of a battery sampling assembly provided by an embodiment of the present disclosure;

[0043] FIG6 is an exploded schematic diagram of a second structure of a battery sampling assembly provided by an embodiment of the present disclosure;

[0044] FIG7 is a schematic diagram of a second structure of a metal sampling sheet provided by an embodiment of the present disclosure;

[0045] FIG8 is a schematic diagram of a second structure of the buffer section of the metal sampling sheet provided in an embodiment of the present disclosure;

[0046] FIG9 is a schematic diagram of a third structure of the buffer section of the metal sampling sheet provided in an embodiment of the present disclosure;

[0047] FIG10 is a schematic structural diagram of a battery pack from a first perspective according to an embodiment of the present disclosure;

[0048] FIG11 is a schematic diagram of a partially enlarged structure of point A in FIG10 ;

[0049] FIG12 is a schematic structural diagram of a battery pack from a second perspective according to an embodiment of the present disclosure;

[0050] FIG13 is a schematic diagram of a partially enlarged structure of point B in FIG12;

[0051] FIG14 is a schematic diagram of the structure of a circuit board provided in an embodiment of the present disclosure.

[0052] Icon: 100-battery sampling assembly; 110-metal sampling piece; 111-main body; 113-first end; 115-second end; 117-straight section; 121-first surface; 123-second surface; 125-side; 130-buffer section; 131-first segment; 133-second segment; 135-arc section; 137-first arc portion; 139-second arc portion; 150-insulating film; 151-through hole; 200-battery pack; 201-first side; 203-second side; 210-battery cell; 220-bus; 230-circuit board; 231-pin; 240-isolation support plate. DETAILED DESCRIPTION

[0053] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations.

[0054] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure as claimed, but merely represents selected embodiments of the present disclosure. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0055] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0056] In the description of the present disclosure, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present disclosure.

[0057] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0058] It should be noted that, in the absence of conflict, the features in the embodiments of the present disclosure may be combined with each other.

[0059] Existing battery cells all have poles on different sides of the cell. These poles need to be transferred to the same side to facilitate the collection of battery pack information. The inventors have found through long-term research that most existing transfer methods use wiring harness transfer and flexible circuit board transfer.

[0060] Among them, if the wiring harness is used for switching, the structure is complex, the wiring harness is numerous, the connection efficiency is low, and it is easy to cause wiring short circuits or missing connections. If flexible circuit board switching is used, it needs to go through two switching processes, which is complex, has low connection efficiency and high cost.

[0061] Therefore, in order to overcome at least one of the defects of the prior art, the present application proposes a battery sampling assembly 100 with a simple structure, easy installation, high connection efficiency, and conducive to reducing costs.

[0062] Please refer to Figures 1 to 3. This embodiment provides a battery sampling assembly 100, which is applied to a battery pack 200 and can be configured to collect information from each battery cell 210 in the battery pack 200. The collected information includes but is not limited to information such as current, voltage, and temperature. The battery sampling assembly 100 includes a metal sampling piece 110 and an insulating film 150. The metal sampling piece 110 includes a main body 111 and a first end 113 and a second end 115 provided at both ends of the main body 111. The first end 113 is configured to be electrically connected to the bus 220, and the second end 115 is configured to be electrically connected to the circuit board 230. The insulating film 150 covers the main body 111 of the metal sampling piece 110 and is configured to maintain insulated contact between the metal sampling piece 110 and the battery cell 210. The battery sampling assembly 100 has a simple structure, the metal sampling piece 110 is easy to install and position, the connection is convenient, the assembly efficiency is high, and the cost is low.

[0063] Optionally, the metal sampling sheet 110 includes but is not limited to one or more of a gold sheet, a silver sheet, a copper sheet, an aluminum sheet, a tin sheet, a nickel sheet, an iron sheet or a cobalt sheet.

[0064] In conjunction with Figure 3, in this embodiment, the metal sampling sheet 110 is in the form of a long thin sheet. The long thin sheet shape can reduce weight and volume, which is beneficial to reducing the overall size and occupied space of the battery pack 200. The metal sampling sheet 110 is arranged from one side of the battery cell 210 where the pole is provided to the other side of the battery cell 210 where the pole is provided, so as to facilitate the transfer of the pole on one side to the other side of the battery cell 210. It should be understood that the battery cell 210 includes an upper surface, a lower surface and four circumferential side surfaces, wherein the upper surface and the lower surface are arranged relative to each other. The metal sampling sheet 110 can be arranged above the battery cell 210, that is, arranged along the upper surface of the battery cell 210. The metal sampling sheet 110 can also be arranged below the battery cell 210 and arranged along the lower surface of the battery cell 210. Alternatively, the metal sampling sheet 110 is arranged along the side surface 125 of the battery cell 210, or the metal sampling sheet 110 is arranged in the middle of the battery cell 210 and passes through the gap between adjacent battery cells 210 to connect the electrode on one side of the battery cell 210 to the circuit board 230 on the other side. The arrangement path of the metal sampling sheet 110 can be a straight line, a curve, or a broken line, etc., which is not specifically limited here.

[0065] Optionally, the cross-sectional shape of the metal sampling piece 110 can be square, diamond, rectangle, triangle, trapezoid, ellipse, circle or a combination of multiple shapes. Alternatively, the metal sampling piece 110 can adopt any other regular or irregular shape, which is not specifically limited here.

[0066] 4 , the ratio of the width W to the thickness T of the metal sampling sheet 110 is 10 to 100. Optionally, the thickness of the metal sampling sheet 110 is greater than or equal to 0.05 mm, which is beneficial to improving the connection strength between the metal sampling sheet 110 and the circuit board 230, or to improving the connection strength between the metal sampling sheet 110 and the bus 220.

[0067] The body 111 of the metal sampling piece 110 includes a side surface 125 and a first surface 121 and a second surface 123 disposed opposite each other. The side surface 125 is configured to connect the first surface 121 and the second surface 123. An insulating film 150 covers the first surface 121 and the second surface 123, respectively. As will be readily understood, the insulating film 150 is provided on both sides of the first surface 121 and the second surface 123 of the metal sampling piece 110, respectively, to improve the insulation between the metal sampling piece 110 and other electrical components and prevent short circuits. In this embodiment, a layer of insulating film 150 is provided on the first surface 121, and a layer of insulating film 150 is provided on the second surface 123. The two layers of insulating film 150 on both sides of the first surface 121 and the second surface 123 are press-fitted and connected on the side surface 125 of the metal sampling piece 110. In this way, the side surface 125 of the metal sampling piece 110 is also covered with the insulating film 150, configured to ensure insulated contact between the metal sampling piece 110 and other electrical components and prevent short circuits.

[0068] Of course, the surface of the metal sampling sheet 110 may be covered with the insulating film 150 by two layers of insulating film 150, i.e., the metal sampling sheet 110 is located between the two layers of insulating film 150. Alternatively, a single insulating film 150 may be wound along the surface of the metal sampling sheet 110, i.e., the insulating film 150 wraps around the metal sampling sheet 110, which is not specifically limited here. Each metal sampling sheet 110 may be covered with one or two insulating films 150, or multiple metal sampling sheets 110 may share one or two insulating films 150, which is not specifically limited here.

[0069] Optionally, the metal sampling piece 110 and the insulating film 150 can be fixed by colloid bonding, which is beneficial to improve the fit and connection stability of the insulating film 150 and the metal sampling piece 110. The colloid can be a thermally conductive adhesive to improve heat dissipation. The thickness of the insulating film 150 is 0.03mm to 0.5mm, for example, it can be 0.05mm, 0.1mm, 02mm, 0.3mm, 0.4mm, 0.5mm or any value in the interval. The thickness of the insulating film 150 should be understood as the thickness of the insulating film 150 covered on one side of the metal sampling piece 110. If the first surface 121 is covered with a layer of insulating film 150, the thickness of the layer of insulating film 150 is 0.03mm to 0.5mm. If the first surface 121 is covered with multiple layers of insulating film 150, the sum of the thicknesses of the multiple layers of insulating film 150 is 0.03mm to 0.5mm. The insulating film 150 may be made of one or more materials selected from the group consisting of polypropylene (PP), polyethylene terephthalate (PET), polypropylene, and polyimide.

[0070] In conjunction with Figures 5 and 6 , it should be noted that a battery sampling assembly 100 includes multiple metal sampling sheets 110 arranged side by side and spaced apart, i.e., the number of metal sampling sheets 110 is multiple. Optionally, the distance between two adjacent metal sampling sheets 110 is greater than or equal to 2 mm. Optionally, the lengths of the metal sampling sheets 110 are consistent, which improves sampling accuracy.

[0071] Each metal sampling sheet 110 can be covered by an independent insulating film 150, or a single insulating film 150 can simultaneously cover multiple metal sampling sheets 110. If a single insulating film 150 simultaneously covers multiple metal sampling sheets 110, a through hole 151 can be provided in the insulating film 150. The through hole 151 is spaced apart from the metal sampling sheets 110, i.e., the through hole 151 is provided between two adjacent metal sampling sheets 110. The through hole 151 can reduce weight and dissipate heat.

[0072] Optionally, the insulating films 150 on both sides of the metal sampling piece 110 may respectively have through holes 151, or the insulating films 150 on one side may have through holes 151. If the insulating films 150 on both sides have through holes 151, the through holes 151 on both sides may be set correspondingly or staggered. The staggered setting may be understood as a complete staggered setting or a partial staggered setting, and the complete staggered setting means that the projection area of ​​the through hole 151 on one side on the metal sampling piece 110 and the projection area of ​​the through hole 151 on the other side on the metal sampling piece 110 do not overlap. The partial staggered setting means that the projection area of ​​the through hole 151 on one side on the metal sampling piece 110 and the projection area of ​​the through hole 151 on the other side on the metal sampling piece 110 partially overlap. The corresponding setting may be understood as the projection area of ​​the through hole 151 on one side on the metal sampling piece 110 and the projection area of ​​the through hole 151 on the other side on the metal sampling piece 110 completely overlap. The number, shape, and arrangement of through-holes 151 on insulating film 150 can be flexibly adjusted based on practical needs and are not specifically limited herein. If through-holes 151 on both sides of insulating film 150 are partially or completely aligned, colloid or other media can be directly injected into battery cells 210 through through-holes 151 , simplifying the production process of battery pack 200 and improving its production efficiency.

[0073] Of course, the through holes 151 on the insulating film 150 can also be omitted, as shown in the structure of the insulating film 150 on the first surface 121 side of the body 111 in FIG6 . In the embodiment corresponding to FIG6 , the insulating film 150 on the first surface 121 side of the body 111 does not have the through holes 151, while the insulating film 150 on the second surface 123 side of the body 111 has the through holes 151.

[0074] It should be noted that the insulating film 150 only covers the main body 111 of the metal sampling piece 110. The first end 113 and the second end 115 of the metal sampling piece 110 serve as electrical connection ends and are not provided with the insulating film 150. The first end 113 and the second end 115 are exposed metal portions, and the length of the first end 113 and the second end 115 are respectively greater than or equal to 5 mm to ensure a reliable electrical connection between the metal sampling piece 110 and the circuit board 230 or the bus 220.

[0075] Optionally, with continued reference to FIG4 , the first end portion 113 and the second end portion 115 are each provided with a straight section 117, and the length of the straight section 117 is greater than or equal to 3 mm. The straight section 117 is configured as an effective electrical connection area between the metal sampling piece 110 and the circuit board 230 or the bus bar 220. For example, the straight section 117 is welded to the circuit board 230 or the bus bar 220, respectively. Setting the length of the straight section 117 to be greater than or equal to 3 mm is conducive to ensuring the reliability and stability of welding, improving welding strength, and improving the stability of electrical connection. The structures of the first end portion 113 and the second end portion 115 are similar. FIG4 only shows the structure of the second end portion 115, and the structure of the first end portion 113 is not repeated.

[0076] Optionally, the metal sampling piece 110 is provided with a buffer section 130, which can adjust the length of the metal sampling piece 110. The provision of the buffer section 130 helps to solve the problem of installation failure due to position error during installation, reduces the installation accuracy requirements, and can be smoothly assembled within the allowable positioning error range, with good compatibility. In addition, the buffer section 130 can also prevent the battery pack 200 from being pulled during use, such as when there is severe shaking or shaking, which may cause the metal sampling piece 110 to fail to connect, and has a certain shock absorption and buffering effect.

[0077] The buffer section 130 can be provided at any position on the metal sampling piece 110, such as at least one of the first end 113, the second end 115, and the body 111. As shown in FIG3, the buffer section 130 is provided at the first end 113 and the second end 115, respectively. As shown in FIG7, the buffer section 130 is provided at the first end 113, the second end 115, and the body 111, respectively. The cross-section of the buffer section 130 can be a curved surface or any curved surface, and can be in any shape such as an arc, a wave, a W shape, a U shape, a V shape, or a Z shape, or can be in a pulse shape or a spiral shape. The number of buffer sections 130 can be one or more, and is not specifically limited here.

[0078] Alternatively, referring to Figure 4 , taking the example of a buffer section 130 disposed at the second end portion 115, the second end portion 115 includes a buffer section 130 and a straight section 117 connected to each other, with the buffer section 130 connected to the body 111. Alternatively, the buffer section 130 is an L-shaped bend, that is, the buffer section 130 includes a first segment 131 and a second segment 133 connected to each other, with the first segment 131 connected to the body 111 and the second segment 133 connected to the straight section 117. The first segment 131 and the second segment 133 are arranged at an angle. In this embodiment, the up-down direction is defined as follows: the first surface 121 faces upward and the second surface 123 faces downward. The first segment 131 extends downward from the body 111, and the second segment 133 extends away from the body 111 from the first segment 131. The straight section 117 extends away from the body 111 from the second segment 133, that is, the straight section 117 extends downward and is arranged parallel to the first segment 131. The connection between the first segment 131 and the body 111, the connection between the second segment 133 and the first segment 131, and the connection between the straight segment 117 and the second segment 133 are all connected by arc transition, which reduces stress concentration of the structure and has a better buffering effect.

[0079] It should be noted that the arrangement direction of the straight section 117 is not limited to the extending direction shown in the figure and can be flexibly set according to actual needs, as long as it facilitates welding of the straight section 117 at the first end 113 to the busbar 220 and facilitates welding of the straight section 117 at the second end 115 to the pins 231 of the circuit board 230.

[0080] 8 , optionally, the buffer section 130 is an arc section 135, one end of which is connected to the body 111 and the other end is connected to the straight section 117. The arc section 135 can be convex upward or concave downward, or wavy, which is not specifically limited here.

[0081] 9 , optionally, taking the example of a buffer section 130 disposed on the body 111, the buffer section 130 includes a first arc portion 137 and a second arc portion 139 connected to each other. The first arc portion 137 and the second arc portion 139 are recessed in opposite directions. The first arc portion 137 is connected to the body 111 near the second end 115, and the second arc portion 139 is connected to the body 111 near the first end 113. The first arc portion 137 is convex upward, and the second arc portion 139 is concave downward. The first arc portion 137 and the second arc portion 139 are connected by a smooth transition along the cross section. The first arc portion 137 and the second arc portion 139 are respectively connected to the body 111 using a circular arc transition to reduce stress concentration in the structure.

[0082] Optionally, a buffer segment 130 is provided on the first end 113, the second end 115 and the main body 111, respectively. The shape and size of each buffer segment 130 can be the same or different. The number of buffer segments 130 in each section of the metal sampling piece 110 can be the same or different. For example, the first end 113 and the second end 115 are each provided with a buffer segment 130, and the main body 111 is provided with multiple buffer segments 130, which is not specifically limited here. Optionally, the entire metal sampling piece 110 can be integrally formed and segmentally connected, that is, the first end 113, the main body 111, the second end 115 and the buffer segment 130 can be integrally formed or segmentally connected.

[0083] In conjunction with Figures 1 and 10 to 14, an embodiment of the present disclosure further provides a battery pack 200, comprising a plurality of battery cells 210, a bus 220, a circuit board 230, and the above-mentioned battery sampling assembly 100. The bus 220 is provided on both sides of the battery cell 210 with the poles, and the bus 220 is electrically connected to the poles of the plurality of battery cells 210. The circuit board 230 is provided on one of the two sides of the battery cell 210 with the poles. The bus 220 on the same side of the battery cell 210 as the circuit board 230 is electrically connected to the circuit board 230. The battery sampling assembly 100 is provided across both sides of the battery cell 210 with the poles, wherein the first end 113 of the metal sampling piece 110 is electrically connected to the bus 220 on the side away from the circuit board 230, and the second end 115 is electrically connected to the circuit board 230. The bus 220 on the side away from the circuit board 230 is transferred to the other side opposite the battery cell 210 through the metal sampling piece 110, so as to facilitate the collection of information of the battery cell 210 on the same side. The battery sampling assembly 100 of the battery pack 200 has a simple structure, convenient connection, high connection efficiency, stable and reliable electrical connection, which is conducive to improving sampling efficiency and sampling stability, and has low production cost.

[0084] It can be understood that the battery cell 210 includes a first side 201 and a second side 203 disposed opposite each other. The first side 201 and the second side 203 are each provided with a pole. The first side 201 and the second side 203 are each provided with a busbar 220. The busbar 220 on the first side 201 is electrically connected to the pole on the first side 201, and the busbar 220 on the second side 203 is electrically connected to the pole on the second side 203. Optionally, an isolation support plate 240 is respectively provided on the first side 201 and the second side 203. The isolation support plate 240 is disposed between the battery cell 210 and the busbar 220. The isolation support plate 240 can provide support and insulation. In addition, the isolation support plate 240 can also play a positioning role during the assembly process, thereby improving assembly efficiency.

[0085] The circuit board 230 is disposed on the first side 201 or the second side 203 of the battery cell 210. In this embodiment, the circuit board 230 is disposed on the first side 201 and is fixedly connected to the isolation support plate 240 on the first side 201. The circuit board 230 is also electrically connected to the bus 220 on the first side 201. Optionally, the circuit board 230 is provided with a plurality of pins 231, each of which is welded to the second end portion 115 to achieve electrical connection between the circuit board 230 and the metal sampling sheet 110.

[0086] The first end 113 of the metal sampling sheet 110 is welded to the busbar 220 on the second side 203. Welding methods include, but are not limited to, laser welding, resistance welding, or ultrasonic welding. Alternatively, the first end 113 and the busbar 220 on the second side 203 are connected by riveting, screwing, or conductive adhesive. Similarly, the pin 231 and the second end 115 are electrically connected by, but are not limited to, laser welding, resistance welding, ultrasonic welding, riveting, screwing, or conductive adhesive.

[0087] Optionally, in each battery pack 200 , the number of battery sampling assemblies 100 can be one or more, and multiple battery sampling assemblies 100 are arranged side by side and flexibly adjusted according to the actual number of battery cells 210 and the size of the battery pack 200 to ensure that all the poles on the second side 203 are transferred to the circuit board 230 .

[0088] The battery sampling assembly 100 and battery pack 200 provided in the embodiments of the present disclosure operate as follows:

[0089] The battery sampling assembly 100 spans the first side 201 and second side 203 of the battery cell 210, where the terminals are located. The first end 113 is electrically connected to the busbar 220 on the second side 203, and the second end 115 is electrically connected to the circuit board 230 on the first side 201. The busbar 220 on the second side 203 is connected to the circuit board 230 on the first side 201 via the metal sampling piece 110. The circuit board 230 on the first side 201 is electrically connected to the busbar 220 on the first side 201, allowing the circuit board 230 to simultaneously collect information from both sides of the battery cell 210.

[0090] In summary, the battery sampling assembly 100 and the battery pack 200 provided in the embodiments of the present disclosure have the following beneficial effects, for example:

[0091] The battery sampling assembly 100 provided in the embodiment of the present disclosure includes a metal sampling piece 110 and an insulating film 150 provided on the metal sampling piece 110. The two ends of the metal sampling piece 110 are electrically connected to the bus 220 and the circuit board 230 respectively, so that the sampling of the battery cell 210 can be achieved. The structure is simple, the electrical connection is stable and reliable, the metal sampling piece 110 is easy to install and position, the connection is convenient, and the cost is low. In addition, the metal sampling piece 110 is made of metal sheet, which is small in size and light in weight. The lengths of the metal sampling pieces 110 are consistent, and the sampling accuracy is higher. By setting the buffer section 130, the length of the metal sampling piece 110 can be adjusted, which is convenient for installation and connection, reduces the installation accuracy, and also prevents the problem of pulling breakage or connection failure during use or movement.

[0092] The battery pack 200 provided in the embodiment of the present disclosure includes the above-mentioned battery sampling assembly 100 , and has a simple sampling structure, which facilitates the assembly of the battery pack 200 and is conducive to improving sampling efficiency and stability.

[0093] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims. Industrial Applicability

[0094] The embodiments of the present disclosure provide a battery sampling assembly 100 and a battery pack 200 , which can simplify the sampling structure, reduce costs, and improve sampling efficiency and stability.

Claims

1. A battery sampling assembly, characterized in that: include: A metal sampling piece, comprising a body and a first end and a second end provided at both ends of the body, wherein the first end is configured to be electrically connected to a bus bar, and the second end is configured to be electrically connected to a circuit board; An insulating film covers the body of the metal sampling piece.

2. The battery sampling assembly according to claim 1, characterized in that: The ratio of the width to the thickness of the metal sampling piece is 10 to 100.

3. The battery sampling assembly according to claim 1 or 2, characterized in that: The thickness of the metal sampling piece is greater than or equal to 0.05 mm.

4. The battery sampling assembly according to any one of claims 1 to 3, characterized in that: The thickness of the insulating film is 0.03 mm to 0.5 mm.

5. The battery sampling assembly according to any one of claims 1 to 4, characterized in that: The body includes a first surface and a second surface that are opposite to each other, and the insulating film covers the first surface and the second surface respectively.

6. The battery sampling assembly according to claim 5, characterized in that: The body further includes side surfaces, the side surfaces respectively connecting the first surface and the second surface, and the side surfaces are provided with the insulating film.

7. The battery sampling assembly according to claim 6, characterized in that: The first surface is provided with a layer of the insulating film, the second surface is provided with a layer of the insulating film, and the two layers of the insulating film on both sides of the first surface and the second surface are pressed and connected on the side surface.

8. The battery sampling assembly according to any one of claims 5 to 7, characterized in that: The insulating film is provided with a through hole.

9. The battery sampling assembly according to claim 8, characterized in that: The through hole is located between two adjacent metal sampling sheets.

10. The battery sampling assembly according to claim 8 or 9, characterized in that: The insulating film located on one side of the first surface is provided with a through hole, and the insulating film located on one side of the second surface is provided with a through hole, and the through holes on both sides are arranged correspondingly or staggered.

11. The battery sampling assembly according to any one of claims 1 to 10, characterized in that: The lengths of the first end portion and the second end portion are respectively greater than or equal to 5 mm.

12. The battery sampling assembly according to any one of claims 1 to 11, characterized in that: The first end portion and the second end portion are respectively provided with a straight section, and the length of the straight section is greater than or equal to 3 mm.

13. The battery sampling assembly according to any one of claims 1 to 11, characterized in that: The metal sampling piece is provided with a buffer section, and the buffer section can adjust the length of the metal sampling piece.

14. The battery sampling assembly according to claim 13, characterized in that: The buffer section is provided on at least one of the first end portion, the second end portion and the main body.

15. The battery sampling assembly according to claim 14, characterized in that: The buffer section is arranged on the first end and the second end, and the buffer section includes a first segment and a second segment connected to each other. The first end and the second end are respectively provided with a straight section; the first segment is connected to the body, and the second segment is connected to the straight section.

16. The battery sampling assembly according to claim 14 or 15, characterized in that: The buffer section is provided on the main body, and includes a first arc portion and a second arc portion connected to each other, wherein the first arc portion and the second arc portion are recessed in opposite directions.

17. The battery sampling assembly according to any one of claims 1 to 16, characterized in that: The metal sampling piece and the insulating film are fixed by adhesive bonding.

18. The battery sampling assembly according to any one of claims 1 to 17, characterized in that: The number of the metal sampling pieces includes multiple, and the distance between two adjacent metal sampling pieces is greater than or equal to 2 mm.

19. A battery pack, characterized in that: include: Multiple battery cells; busbars, the busbars being disposed on both sides of the battery core and electrically connected to the plurality of battery cores respectively; A circuit board is provided on one side of the battery cell; a busbar located on the same side of the battery cell as the circuit board is electrically connected to the circuit board; At least one battery sampling assembly according to any one of claims 1 to 18; wherein the first end is electrically connected to the bus bar away from the side of the circuit board; and the second end is electrically connected to the circuit board.

20. The battery pack according to claim 19, wherein: The first end portion of the metal sampling piece is welded to the bus bar.