Signal sampling assembly and battery pack

Abstract

The utility model discloses a signal sampling assembly and battery pack relates to battery technical field, and this signal sampling assembly includes signal sampling main branch, conducting element and flexible sampling branch, and conducting element is arranged at interval with signal sampling main branch, and is configured to be connected to the electric core, and the flexible sampling branch is connected in signal sampling main branch along the one end of extension direction, and the other end is connected to conducting element, and is configured to collect the voltage signal and / or temperature signal of electric core, wherein, the flexible sampling branch is formed with at least one arched buffer portion along the extension direction of flexible sampling branch, and the arched buffer portion is close to conducting element, and the arched buffer portion is configured to buffer the tensile stress on the first flexible sampling branch, the flexible sampling branch of the utility model provides the model sampling assembly, can absorb the change of the connecting position that battery module vibrates or the battery expands brings, avoids the damage that the connecting place receives, guarantees the sampling effect.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a signal sampling assembly and a battery pack. Background Technology

[0002] Currently, to reduce battery pack costs, FCC (Fuel Cell) is often used as the signal sampling component of CCS (Carbon Module System). FCC consists of a main branch and voltage and temperature signal acquisition terminals. The signal acquisition terminals are connected to the main branch via soldering, resulting in a relatively weak connection. When the battery module is installed in a vehicle, poor road conditions and vehicle bumps can cause vibrations in the battery module, or the battery may expand during cyclic charging and discharging. These positional changes can lead to a break in the connection between the main branch and the signal acquisition terminals, affecting the sampling effect. Utility Model Content

[0003] The purpose of this invention is to provide a signal sampling assembly and battery pack that can absorb changes in connection position caused by battery module vibration or battery expansion, avoid damage to the connection, and ensure sampling effect.

[0004] The embodiments of this utility model are implemented as follows:

[0005] In one aspect, this utility model embodiment provides a signal sampling assembly, including:

[0006] Signal sampling main branch;

[0007] A conductive element, which is spaced apart from the main signal sampling branch and configured to be connected to the battery cell;

[0008] A flexible sampling branch, wherein one end of the flexible sampling branch along the extension direction is connected to the main signal sampling branch, and the other end is connected to the conductive element, and is configured to acquire the voltage signal and / or temperature signal of the battery cell;

[0009] Wherein, the first flexible sampling branch has at least one arched buffer portion formed along its extension direction, the arched buffer portion being close to the conductive element, and the arched buffer portion being configured to buffer the tensile stress on the first flexible sampling branch.

[0010] In an optional embodiment, the first flexible sampling branch includes a first flexible sampling branch for acquiring the temperature signal of the battery cell. The first flexible sampling branch includes a first flexible connection portion, a first main branch connection portion, and a first signal acquisition portion. The first main branch connection portion is fitted to the signal sampling main branch, and the first signal acquisition portion is connected to the conductive element. One end of the first flexible connection portion is connected to the first main branch connection portion, and the other end is connected to the first signal acquisition portion. The first flexible connection portion forms at least one of the arched buffer portions, and the arched buffer portions are disposed between the signal sampling main branch and the conductive element.

[0011] In an optional embodiment, the width of the arched buffer section is smaller than the width of the first main branch connection section and / or the first signal acquisition section.

[0012] In an optional embodiment, the first flexible sampling branch further includes a thermistor and an insulating frame. The thermistor is disposed in the first signal acquisition section, and the insulating frame is disposed on one side of the first signal acquisition section and held in place by the conductive element. The thermistor is housed within the insulating frame.

[0013] In an optional embodiment, the first flexible sampling branch further includes an elastic thermal pad disposed on the other side of the first signal acquisition section and configured to adhere to the surface of the battery cell.

[0014] In an optional embodiment, the insulating frame is provided with two opposing elastic buckles, and the conductive element is provided with a receiving opening. The elastic buckles are fitted into the receiving opening and hold the edge of the receiving opening so that the conductive element is pressed against the insulating frame.

[0015] In an optional embodiment, the insulating frame is provided with a positioning protrusion facing the receiving opening. Along the extension direction perpendicular to the flexible sampling branch, the positioning protrusion protrudes from the elastic buckle. The bottom of the receiving opening is provided with a positioning groove communicating with the receiving opening. The width of the positioning groove is greater than the width of the receiving opening. The positioning groove is configured to receive the positioning protrusion. The receiving opening is configured to hold the elastic buckle and abut against the portion of the positioning protrusion that protrudes from the elastic buckle.

[0016] In an optional embodiment, the insulating frame is filled with a thermally conductive adhesive layer, which covers the thermistor, and the insulating frame is bonded to the first signal acquisition unit through the thermally conductive adhesive layer.

[0017] In an optional embodiment, the flexible sampling branch further includes a second flexible sampling branch for acquiring the voltage signal of the battery cell. One end of the second flexible sampling branch along the extension direction is connected to the main signal sampling branch, and the other end is connected to the conductive element. The second flexible sampling branch has at least one arched buffer portion along the extension direction, and the arched buffer portion is configured to buffer the tensile stress on the second flexible sampling branch.

[0018] In an optional embodiment, the second flexible sampling branch includes a second flexible connecting portion, a second main branch connecting portion, and a second signal acquisition portion. The second main branch connecting portion is fitted to the signal sampling main branch, and the second signal acquisition portion is welded to the conductive element. One end of the second flexible connecting portion is connected to the second main branch connecting portion, and the other end is connected to the second signal acquisition portion. The second flexible connecting portion forms at least one of the arched buffer portions.

[0019] On the other hand, this utility model embodiment provides a battery pack, including a battery cell and the aforementioned signal sampling assembly, wherein the conductive element is connected to the battery cell, and the signal sampling assembly acquires the voltage signal and / or temperature signal of the battery cell. The beneficial effects of this utility model embodiment include:

[0020] The signal sampling assembly provided in this embodiment of the invention has conductive elements spaced apart from the main signal sampling branch and connected to the battery cell. One end of a flexible sampling branch is connected to the main signal sampling branch, and the other end is connected to the conductive element. It is configured to collect voltage and / or temperature signals from the battery cell. The flexible sampling branch has at least one arched buffer portion along its extension direction, configured to buffer tensile stress on the flexible sampling branch. Compared to the prior art, this embodiment of the invention, by forming an arched buffer portion on the flexible sampling branch, can buffer tensile stress on the flexible sampling branch through its own deformation when the connection position changes due to battery module vibration or battery expansion. This prevents the flexible sampling branch from being pulled apart, avoids damage to the connection, and ensures sampling effectiveness. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the signal sampling assembly provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the assembly structure of the signal sampling assembly and the battery cell provided for an embodiment of this utility model;

[0024] Figure 3 for Figure 1 A magnified view of a portion of point III;

[0025] Figure 4 This is an exploded view of the signal sampling assembly provided in an embodiment of the present invention.

[0026] Figure 5 This is a partial exploded view of the signal sampling assembly provided in an embodiment of the present invention.

[0027] icon:

[0028] 100 - Signal sampling assembly; 110 - Signal sampling main branch; 130 - Conductive element; 131 - Receiving opening; 132 - Positioning groove; 150 - First flexible sampling branch; 151 - First flexible connection part; 152 - First main branch connection part; 153 - First signal acquisition part; 154 - Thermistor; 155 - Insulating frame; 156 - Elastic thermal conductive pad; 157 - Elastic buckle; 158 - Positioning protrusion; 159 - Thermally conductive adhesive layer; 160 - Arched buffer part; 170 - Second flexible sampling branch; 171 - Second flexible connection part; 172 - Second main branch connection part; 173 - Second signal acquisition part; 200 - Battery cell. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] 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., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] As disclosed in the background art, in the prior art, the signal acquisition terminal and the main branch sampling component are connected together by soldering, which has low connection strength. When the battery module is installed in the vehicle, the battery module vibrates due to poor road conditions and vehicle bumps, or the battery expands during the cycle of charging and discharging. These positional changes may cause the connection between the main branch and the signal acquisition terminal to break, affecting the sampling effect.

[0036] In addition, in the existing technology, the temperature signal acquisition terminal is usually directly bonded to the top cover of the battery cell 200 or the conductive element 130 with glue. When the temperature of the top cover of the battery cell 200 or the conductive element 130 rises, the adhesive performance of the glue decreases under the influence of high temperature. Under the influence of high temperature for a long time, the adhesion between the temperature signal acquisition terminal and the acquired part loosens, resulting in inaccurate temperature signal acquired by the temperature signal acquisition terminal.

[0037] To address the aforementioned problems, this utility model provides a signal sampling assembly and a battery pack. The specific structure and working principle of the signal sampling assembly and battery pack will be described in detail below.

[0038] See Figure 1 and Figure 2 This utility model embodiment provides a signal sampling assembly 100 that can absorb changes in connection position caused by battery module vibration or battery expansion, preventing damage to the connection and ensuring sampling effect. Simultaneously, it employs a snap-fit ​​method to connect the signal terminals, avoiding the problem of inaccurate temperature signals caused by direct glue bonding.

[0039] The signal sampling assembly 100 provided in this embodiment includes a main signal sampling branch 110, a conductive element 130, and a flexible sampling branch. The conductive element 130 is spaced apart from the main signal sampling branch 110 and configured to be connected to the battery cell 200. One end of the flexible sampling branch along the extension direction is connected to the main signal sampling branch 110, and the other end is connected to the conductive element 130. It is configured to collect voltage signals and / or temperature signals from the battery cell 200. The flexible sampling branch has at least one arched buffer portion 160 along the extension direction. The arched buffer portion 160 is close to the conductive element 130 and is configured to buffer the tensile stress on the first flexible sampling branch 150.

[0040] It should be noted that the flexible sampling branch here has a certain deformation capability. During installation, an arched buffer part 160 can be formed by compression. This arched buffer part 160 also has bidirectional deformation capability. When the connection position changes due to battery module vibration or battery expansion, the arched buffer part 160 can buffer the tensile stress on the flexible sampling branch through its own deformation. That is, the deformation of the arched buffer part 160 absorbs the position change, thereby preventing the flexible sampling branch from being pulled apart and avoiding damage to the connection, thus ensuring the sampling effect.

[0041] It should also be noted that the arched buffer section 160 can arch upwards or downwards. In addition, the arched buffer section 160 can be single or multiple. Multiple arched buffer sections 160 can form a wave-shaped buffer structure, which has a better buffering effect.

[0042] See also Figures 1 to 4In some embodiments, the flexible sampling branch includes a first flexible sampling branch 150 for collecting temperature signals from the battery cell 200. The first flexible sampling branch 150 includes a first flexible connection portion 151, a first main branch connection portion 152, and a first signal acquisition portion 153. The first main branch connection portion 152 is attached to the signal sampling main branch 110, and the first signal acquisition portion 153 is connected to the conductive element 130. One end of the first flexible connection portion 151 is connected to the first main branch connection portion 152, and the other end is connected to the first signal acquisition portion 153. The first flexible connection portion 151 forms at least one arched buffer portion 160. Specifically, the first flexible sampling branch 150 can be composed of two PI films and an internal copper sheet, with the copper sheet located between the two PI films. Considering cost and connection strength, the first flexible sampling branch 150 can use a copper sheet with a thickness of 35 μm, which can extend to the first main branch connection portion 152 and the first signal acquisition portion 153. The first main branch connection portion 152 can be soldered onto the signal sampling main branch 110.

[0043] It is worth noting that the first flexible sampling branch 150 has an arched buffer portion 160. When the battery module vibrates or the battery expands during cyclic charging and discharging, the position of the signal sampling main branch 110 and the conductive element 130 may change. At this time, the arched buffer portion 160 can deform to absorb the positional change, thus protecting the first flexible sampling branch 150 and the connection between the signal sampling main branch 110 and other components. It should be noted that the arched buffer portion 160 is not formed during manufacturing, but during assembly. By using positioning fixtures, the first signal acquisition unit 153 is moved towards the first main branch connection portion 152, shortening the distance between the two ends and achieving an arched or wave-shaped arch.

[0044] In some embodiments, the width of the arched buffer portion 160 is smaller than the width of the first main branch connection portion 152 and the first signal acquisition portion 153. The arched buffer portion 160 is located in the middle of the first flexible sampling branch 150, and its width is smaller than the widths at both ends of the first flexible sampling branch 150. Specifically, the width of the arched buffer portion 160 refers to its width along the horizontal direction perpendicular to the first flexible sampling branch 150; similarly, the width of the first flexible sampling branch 150 also refers to its width in the horizontal direction. By widening the arched buffer portion 160, the force required when the ends of the first flexible sampling branch 150 contract can be reduced, resulting in a better buffering effect.

[0045] Furthermore, the first flexible sampling branch 150 also includes a thermistor 154 and an insulating frame 155. The thermistor 154 is disposed on the first signal acquisition section 153, and the insulating frame 155 is disposed on one side of the first signal acquisition section 153 and held onto the conductive element 130. The thermistor 154 is housed within the insulating frame 155. Specifically, the thermistor 154 can be welded to the first signal acquisition section 153, and the thermistor 154 is located within the hollow insulating frame 155. The insulating frame 155 can be made of polyethylene, polypropylene, etc. The insulating frame 155 can be held onto the conductive element 130, thereby fixing the thermistor 154 and the first signal acquisition section 153.

[0046] In some embodiments, the first flexible sampling branch 150 further includes an elastic thermally conductive pad 156, which is disposed on the other side of the first signal acquisition section 153 and configured to adhere to the surface of the battery cell 200. Specifically, the back side of the first signal acquisition section 153, on which the thermistor 154 is welded, is connected to the top cover of the battery cell 200 via the elastic thermally conductive pad 156, thereby enabling the acquisition of the temperature of the top cover of the battery cell 200. The elastic thermally conductive pad 156 can undergo a certain elastic deformation when the insulating frame 155 is held on the conductive element 130, allowing the elastic thermally conductive pad 156 to fully adhere to the surface of the top cover of the battery cell 200, reducing the contact gap between the elastic thermally conductive pad 156 and the top cover of the battery cell 200.

[0047] In other preferred embodiments of this utility model, the back side of the first signal acquisition unit 153 can also be directly attached to the top cover surface of the battery cell 200, and pressed together by the conductive element 130 and the insulating frame 155, which can also achieve the acquisition of temperature signals.

[0048] The first flexible sampling branch 150 is fixed to the conductive element 130 by a snap-fit. After the snap-fit ​​passes through the conductive element 130, it fixes the degree of freedom of the insulating frame 155 in the direction perpendicular to the large surface of the conductive element 130. After the positioning post on the insulating frame 155 is assembled with the conductive element 130, it fixes its degree of freedom within the large surface of the conductive element 130. Therefore, the snap-fit ​​and the positioning post work together to fix the insulating frame 155 to the conductive element 130. The insulating frame 155 is assembled with the conductive element 130 in a bottom-up assembly manner, and the insulating frame 155 is snapped onto the conductive element 130. After assembly, under the downward force applied by the conductive element 130, it is fixed to the top cover of the cell 200 and cannot be removed.

[0049] See also Figures 3 to 5In some embodiments, the insulating frame 155 is provided with two opposing elastic buckles 157, and the conductive element 130 has a receiving opening 131. The elastic buckles 157 are assembled in the receiving opening 131 and held at the edge of the receiving opening 131 to limit the conductive element 130, and the conductive element 130 is pressed onto the insulating frame 155. Specifically, the elastic buckles 157 extend from the opposite side edges of the insulating frame 155. The top of the elastic buckles 157 has a guide slope. When subjected to inward pressing force, they can first move inward towards each other, so as to pass through the receiving opening 131. After passing through the receiving opening 131, the lateral force disappears, and the elastic buckles 157 can rebound, together with the plane of the extending elastic buckles 157, to limit the conductive element 130 and the insulating frame 155 together, and restrict the degree of freedom of the insulating frame 155 in the direction perpendicular to the top surface of the conductive element 130.

[0050] It should be noted that the width of the receiving opening 131 is adapted to the spacing between each elastic buckle 157, so that the elastic buckle 157 can pass through the receiving opening 131 and be held in place on both sides of the receiving opening 131.

[0051] Furthermore, the insulating frame 155 is provided with a positioning protrusion 158 facing the receiving opening 131. Along the extension direction perpendicular to the flexible sampling branch, the positioning protrusion 158 protrudes out of the elastic buckle 157. The bottom of the receiving opening 131 is provided with a positioning groove 132 communicating with the receiving opening 131. The width of the positioning groove 132 is greater than the width of the receiving opening 131. The positioning groove 132 is configured to receive the positioning protrusion 158. The receiving opening 131 is configured to hold the elastic buckle 157 and abut against the portion of the positioning protrusion 158 that protrudes out of the elastic buckle 157. Specifically, the insulating frame 155 is also provided with positioning protrusions 158 spaced apart from the elastic buckle 157. The positioning protrusions 158 are correspondingly fitted in the positioning grooves 132. Specifically, the positioning protrusion 158 and the elastic buckle 157 are respectively inserted into the positioning groove 132 and the receiving opening 131. The cooperation between the positioning protrusion 158 and the positioning groove 132 can achieve mutual limiting of the first flexible sampling branch 150 and the conductive element 130 in the horizontal direction, ensuring that the insulating frame 155 can be firmly held. In addition, there is a certain gap between the positioning protrusion 158 and the elastic buckle 157, which can avoid mutual interference between the two and ensure that the elastic buckle 157 can smoothly undergo elastic deformation.

[0052] In some embodiments, the insulating frame 155 is filled with a thermally conductive adhesive layer 159, which covers the thermistor 154. The insulating frame 155 is bonded to the first signal acquisition unit 153 through the thermally conductive adhesive layer 159. Specifically, thermally conductive adhesive is injected into the hollow portion of the insulating frame 155 to seal the thermistor 154 within the insulating frame 155, thereby protecting the thermistor 154 and strengthening the connection between the insulating frame 155 and the first signal acquisition unit 153.

[0053] In some embodiments, the flexible sampling branch further includes a second flexible sampling branch 170 for acquiring voltage signals from the battery cell 200. One end of the second flexible sampling branch 170 is connected to the signal sampling main branch 110 along the extension direction, and the other end is connected to the conductive element 130. The second flexible sampling branch 170 has at least one arched buffer portion 160 along the extension direction, and the arched buffer portion 160 is configured to buffer tensile stress on the second flexible sampling branch 170.

[0054] It should be noted that an arched buffer section 160 is also formed on the second flexible sampling branch 170, which can also achieve buffering of the second flexible sampling branch 170. The specific structure and preparation method can be referred to the arched buffer section 160 on the first flexible sampling branch 150.

[0055] Further, the second flexible sampling branch 170 includes a second flexible connection portion 171, a second main branch connection portion 172, and a second signal acquisition portion 173. The second main branch connection portion 172 is fitted to the signal sampling main branch 110, and the second signal acquisition portion 173 is soldered to the conductive element 130. One end of the second flexible connection portion 171 is connected to the second main branch connection portion 172, and the other end is connected to the second signal acquisition portion 173. The second flexible connection portion 171 forms at least one arched buffer portion 160. Specifically, the second flexible sampling branch 170 can also be composed of two layers of PI film and an internal copper sheet, with the copper sheet located between the two layers of PI film. Considering cost and connection strength, the second flexible sampling branch 170 can use a copper sheet with a thickness of 50μm, which can extend to the second main branch connection portion 172 and the second signal acquisition portion 173. The second main branch connection portion 172 can be soldered to the signal sampling main branch 110, and the second signal acquisition portion 173 can be directly soldered to the conductive element 130. Furthermore, the second signal acquisition unit 173 exposes the copper sheet through a window, while the copper sheet is still covered by a PI film. The PI film around the copper sheet strengthens the connection between the second signal acquisition unit 173 and the conductive element 130.

[0056] Please continue reading Figure 2This utility model embodiment also provides a battery pack, including a battery cell 200 and the aforementioned signal sampling assembly 100. The signal sampling assembly 100 includes a main signal sampling branch 110, a conductive element 130, and a flexible sampling branch. The conductive element 130 is spaced apart from the main signal sampling branch 110 and configured to be connected to the battery cell 200. One end of the flexible sampling branch along its extension direction is connected to the main signal sampling branch 110, and the other end is connected to the conductive element 130. It is configured to collect voltage and / or temperature signals from the battery cell 200. The flexible sampling branch has at least one arched buffer portion 160 along its extension direction. The arched buffer portion 160 is close to the conductive element 130 and is configured to buffer tensile stress on the first flexible sampling branch 150. The conductive element 130 is connected to the battery cell 200, and the signal sampling assembly 100 collects the voltage and / or temperature signals from the battery cell 200.

[0057] In summary, the signal sampling assembly 100 and battery pack provided in this embodiment of the invention have conductive elements 130 and signal sampling main branches 110 spaced apart and connected to the battery cells 200. One end of a flexible sampling branch is connected to the signal sampling main branch 110, and the other end is connected to the conductive elements 130. It is configured to collect voltage and / or temperature signals from the battery cells 200. The flexible sampling branch has at least one arched buffer portion 160 along its extension direction, which is configured to buffer tensile stress on the flexible sampling branch. Compared to the prior art, this embodiment of the invention, by forming an arched buffer portion 160 on the flexible sampling branch, allows the arched buffer portion 160 to buffer tensile stress on the flexible sampling branch through its own deformation when the connection position changes due to battery module vibration or battery expansion. This prevents the flexible sampling branch from being pulled apart, avoids damage to the connection, and ensures sampling effectiveness. In addition, the first flexible sampling branch 150 is connected to the conductive element 130 by the elastic buckle 157 on the insulating frame 155. The signal terminal can be connected by snap-fit, avoiding the problem of inaccurate temperature signal acquisition caused by direct glue bonding.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A signal sampling assembly, characterized in that, include: Signal sampling main branch (110); A conductive element (130) is disposed at a distance from the signal sampling main branch (110) and configured to be connected to the battery cell (200); A flexible sampling branch, one end of which is connected to the main signal sampling branch (110) along its extension direction, and the other end of which is connected to the conductive element (130), is configured to acquire the voltage signal and / or temperature signal of the battery cell (200); The flexible sampling branch has at least one arched buffer portion (160) formed along its extension direction. The arched buffer portion (160) is close to the conductive element (130) and is configured to buffer the tensile stress on the flexible sampling branch.

2. The signal sampling assembly according to claim 1, characterized in that, The flexible sampling branch includes a first flexible sampling branch (150) for collecting temperature signals from the battery cell (200). The first flexible sampling branch (150) includes a first flexible connection portion (151), a first main branch connection portion (152), and a first signal acquisition portion (153). The first main branch connection portion (152) is fitted to the signal sampling main branch (110), and the first signal acquisition portion (153) is connected to the conductive element (130). One end of the first flexible connection portion (151) is connected to the first main branch connection portion (152), and the other end is connected to the first signal acquisition portion (153). The first flexible connection portion (151) is arched to form at least one arched buffer portion (160), and the arched buffer portion (160) is disposed between the signal sampling main branch (110) and the conductive element (130).

3. The signal sampling assembly according to claim 2, characterized in that, The width of the arched buffer section (160) is smaller than the width of the first main branch connection section (152) and / or the first signal acquisition section (153).

4. The signal sampling assembly according to claim 2, characterized in that, The first flexible sampling branch (150) further includes a thermistor (154) and an insulating frame (155). The thermistor (154) is disposed in the first signal acquisition unit (153). The insulating frame (155) is disposed on one side of the first signal acquisition unit (153) and is held in place on the conductive element (130). The thermistor (154) is housed within the insulating frame (155).

5. The signal sampling assembly according to claim 4, characterized in that, The first flexible sampling branch (150) also includes an elastic thermal pad (156), which is disposed on the other side of the first signal acquisition part (153) and configured to adhere to the surface of the battery cell (200).

6. The signal sampling assembly according to claim 4, characterized in that, The insulating frame (155) is provided with two opposing elastic buckles (157), and the conductive element (130) is provided with a receiving opening (131). The elastic buckle (157) is assembled in the receiving opening (131) and held at the edge of the receiving opening (131) so that the conductive element (130) is pressed against the insulating frame (155).

7. The signal sampling assembly according to claim 6, characterized in that, The insulating frame (155) has a positioning protrusion (158) facing the receiving opening (131). The positioning protrusion (158) protrudes from the elastic buckle (157) along the extension direction perpendicular to the flexible sampling branch. The bottom of the receiving opening (131) has a positioning groove (132) communicating with the receiving opening (131). The width of the positioning groove (132) is greater than the width of the receiving opening (131). The positioning groove (132) is configured to receive the positioning protrusion (158). The receiving opening (131) is configured to hold the elastic buckle (157) and abut against the portion of the positioning protrusion (158) that protrudes from the elastic buckle (157).

8. The signal sampling assembly according to claim 4, characterized in that, The insulating frame (155) is filled with a thermally conductive adhesive layer (159), which covers the thermistor (154).

9. The signal sampling assembly according to claim 1, characterized in that, The flexible sampling branch further includes a second flexible sampling branch (170) for acquiring the voltage signal of the battery cell (200). One end of the second flexible sampling branch (170) along the extension direction is connected to the signal sampling main branch (110), and the other end is connected to the conductive element (130). The second flexible sampling branch (170) arches along the extension direction to form at least one arched buffer portion (160), which is configured to buffer the tensile stress on the second flexible sampling branch (170).

10. A battery pack, characterized in that, Includes a battery cell (200) and a signal sampling assembly as described in any one of claims 1-9, wherein the conductive element (130) is connected to the battery cell (200), and the signal sampling assembly acquires the voltage signal and / or temperature signal of the battery cell (200).

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