Temperature sampling structure and battery pack

Abstract

The utility model discloses a temperature sampling structure and a battery pack, and belongs to the technical field of batteries, the temperature sampling structure is used for detecting the temperature of a single battery, one side of the single battery along a second direction is provided with a circuit assembly, and the temperature sampling structure comprises a detection member which is connected with a battery large surface of the single battery and is used for detecting the temperature of the battery large surface. The detection piece arranged on the large surface of the battery can be closer to a heating source, and the transfer distance of heat from the inside to the detection piece is reduced, so that the heat loss and temperature attenuation are reduced, the measurement error is reduced, the sampling accuracy is improved, the risk of thermal runaway caused by the abnormal temperature of the battery is reduced, and the safety is improved. Meanwhile, the connecting piece on the temperature sampling structure not only can connect the detection piece with the circuit assembly, but also can directly install the detection piece on the large surface of the battery through the bearing part, so that the installation convenience of the detection piece is improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology, and specifically relates to a temperature sampling structure and a battery pack. Background Technology

[0002] A battery pack is an integrated device that combines multiple individual battery cells (cells) in series and parallel connections, along with a management system, cooling system, and protection structure. It is a core component of energy storage equipment and is widely used in electric vehicles, hybrid vehicles, and energy storage power stations. To understand the temperature changes of individual battery cells during operation, temperature sampling is necessary; however, the accuracy of these samplings is low, and the results differ significantly from the actual internal temperature of the individual cells. Utility Model Content

[0003] Purpose of the utility model: The embodiments of this application provide a temperature sampling structure, which aims to overcome the technical problem of low accuracy in temperature sampling of individual cells.

[0004] Technical solution: The temperature sampling structure described in this application embodiment is used to detect the temperature of a single battery cell. A circuit assembly is disposed on one side of the single battery cell along a second direction. The temperature sampling structure includes:

[0005] The detection element is connected to the large surface of the individual battery cell and is used to detect the temperature of the large surface of the battery cell.

[0006] A connector is connected to the detection component and the circuit assembly respectively. The connector includes a support portion, and the detection component is connected to the large surface of the battery through the support portion.

[0007] In some embodiments, the connector includes:

[0008] The intermediate portion includes a circuit connected to the carrier portion;

[0009] A first docking part is connected to the side of the circuit away from the carrier part, and the first docking part is used to connect with the circuit assembly.

[0010] In some embodiments, the circuit is a flexible structure.

[0011] In some embodiments, the intermediate portion and the supporting portion are an integral structure.

[0012] This application embodiment also provides a battery pack, including:

[0013] Multiple individual cells are arranged at intervals along a first direction, and each individual cell has a large battery surface on both sides along the first direction.

[0014] A circuit assembly is located on one side of the single cell along the second direction and is connected to the single cell, the second direction intersecting the first direction;

[0015] The temperature sampling structure as described in any one of the above statements is connected to the battery surface and the circuit assembly, respectively.

[0016] In some embodiments, the sensing element of the temperature sampling structure is connected to the center of the large surface of the battery via a connector.

[0017] In some embodiments, the circuit assembly includes a second docking portion connected to a first docking portion of the temperature sampling structure.

[0018] In some embodiments, the single battery cell includes a connecting portion disposed on the large surface of the battery, and the detection element of the temperature sampling structure is connected to a support portion, the support portion being connected to the large surface of the battery through the connecting portion.

[0019] In some embodiments, the connecting portion is a magnetic coating, and the magnetic coating is magnetically connected to the carrier portion.

[0020] In some embodiments, the battery pack further includes:

[0021] Multiple separators are arranged at intervals along the first direction, with a placement space between two adjacent separators. Each individual battery cell is located in one of the placement spaces and connected to two adjacent separators. The detection element of the temperature sampling structure is connected to the separator on the side facing away from the large surface of the battery.

[0022] The separator has a receiving cavity on the side facing the single cell, and at least a portion of the temperature sampling structure is disposed within the receiving cavity.

[0023] Beneficial Effects: An embodiment of this application provides a temperature sampling structure for detecting the temperature of a single battery cell. A circuit assembly is disposed on one side of the single battery cell along a second direction. The temperature sampling structure includes: a detection element connected to the large surface of the single battery cell for detecting the temperature of the large surface; and a connector connected to both the detection element and the circuit assembly. The connector includes a support portion, through which the detection element is connected to the large surface of the battery. Distributing the detection element on the large surface of the battery allows it to be closer to the heat source, reducing the heat transfer distance from the interior to the detection element, thereby reducing heat loss and temperature decay, reducing measurement errors, improving sampling accuracy, lowering the risk of thermal runaway caused by abnormal battery temperature, and improving safety. Furthermore, the connector on the temperature sampling structure not only connects the detection element to the circuit assembly but also allows the detection element to be directly mounted on the large surface of the battery via the support portion, improving the ease of installation. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the exploded structure of the battery pack according to an embodiment of this application;

[0026] Figure 2 This is a three-dimensional structural diagram of the temperature sampling structure according to an embodiment of this application;

[0027] Figure 3 This is a three-dimensional structural diagram of the connector according to an embodiment of this application;

[0028] Figure 4 This is a partial exploded view of the battery pack structure according to an embodiment of this application;

[0029] Figure 5 Examples of this application Figure 4 Enlarged view of area A in the middle;

[0030] Figure 6 This is a perspective view of the battery pack according to an embodiment of this application;

[0031] Figure 7 This is a top view of the battery pack according to an embodiment of this application;

[0032] Figure 8 Examples of this application Figure 7 Enlarged view of area B in the middle;

[0033] Figure 9 Examples of this application Figure 1 Enlarged view of area C;

[0034] Figure 10 This is a perspective view of the separator in an embodiment of this application;

[0035] Explanation of reference numerals in the attached drawings: 10-Single cell; 11-Battery surface; 12-Connector; 21-Detection component; 22-Connector; 221-Bearing component; 222-Intermediate part; 223-First docking part; 224-Circuit; 30-Circuit assembly; 31-Second docking part; 40-Separator; 41-Placement space; 42-Accommodation cavity; 43-Through hole; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0038] A battery pack is an integrated device that combines multiple individual battery cells (cells) in series and parallel, along with a management system, heat dissipation system, and protection structure. It is a core component of energy storage devices and is widely used in electric vehicles, hybrid vehicles, and energy storage power stations. To understand the temperature changes of individual battery cells during operation, temperature sampling is necessary. This is typically done using temperature sampling structures such as thermistors and temperature sensors. These structures are usually mounted on aluminum foil or nickel sheets, which are then soldered to the foil or integrated with a flexible printed circuit board (FPC), which is then glued to the battery top cover. While these methods allow for temperature collection from individual cells, the sampling structures are relatively far from the center of the battery, resulting in significant differences between the sampled temperature and the actual internal temperature, leading to inaccurate and low-precision sampling.

[0039] In view of the above, embodiments of this application provide a battery pack to overcome at least one of the above-mentioned technical problems.

[0040] Please see Figure 1 , Figure 2 and Figure 4 In this embodiment, the battery pack includes multiple individual batteries 10, circuit components 30, and a temperature sampling structure. The temperature sampling structure includes a detection element 21 and a connector 22. Its structure is relatively simple, requiring no complex mechanical or electronic components. During manufacturing, the temperature sampling structure does not require the creation of molds (molds are tools used for mass production of parts). The production process of the temperature sampling structure is more flexible and faster, saving the cost and time of mold development, resulting in lower overall production costs.

[0041] Multiple individual battery cells 10 are arranged at intervals along a first direction X, and each individual battery cell 10 has a large battery surface 11 on both sides along the first direction X. At least one large battery surface 11 of the individual battery cell 10 is connected to a detection element 21, which is used to detect the temperature of the large battery surface 11. A circuit assembly 30 is located on one side of the individual battery cell 10 along a second direction Y and is connected to the individual battery cell 10 (e.g., Figure 4 (As shown).

[0042] Understandably, multiple individual cells 10 arranged at intervals along the first direction X can be placed inside the battery pack. This arrangement optimizes the utilization of the internal space of the battery pack, improves heat dissipation performance, and facilitates management and maintenance. Multiple individual cells arranged along the first direction X constitute a battery pack. Multiple battery packs can be placed inside the battery pack, each battery pack arranged along the third direction Z of the battery pack. Each individual cell 10 includes a top surface and a bottom surface, as well as two large battery surfaces 11 and two narrow surfaces connecting the top and bottom surfaces. The top and bottom surfaces are arranged opposite each other in the second direction Y, and the circuit assembly 30 is disposed on the top surface. The two large battery surfaces 11 are arranged opposite each other in the first direction X, and the two narrow surfaces are arranged opposite each other in the third direction Z. The area of ​​the large battery surfaces 11 is larger than the area of ​​the narrow surfaces. The large battery surfaces 11 are typically closer to the contact points of the internal electrodes and electrolyte, resulting in a more concentrated temperature on the large battery surfaces 11. Figure 1 As shown, the first direction X is the length direction of the battery pack, the second direction Y is the height direction of the battery pack, and the third direction Z is the width direction of the battery pack. The first direction X, the second direction Y, and the third direction Z intersect each other, and preferably, the three are perpendicular to each other.

[0043] A detection element 21 is installed inside the battery pack to detect the temperature of the individual battery cells 10. One or more detection elements 21 can be installed. If only one detection element 21 is installed, it is connected to one of the individual battery cells 10. If multiple detection elements 21 are installed, each detection element 21 can be connected to one individual battery cell 10. The detection element 21 can be a thermistor, resistive temperature sensor, thermocouple, integrated temperature chip, or other structure capable of detecting temperature. The detection element 21 can be installed on the large surface 11 of the individual battery cell 10 via a connector 22. The detection element 21 can be placed in a corresponding area on the large surface 11 as needed to sample the temperature of the large surface 11. The heat generated by the individual battery cell 10 is mainly concentrated in the internal central area, especially during charging and discharging. Installing the detection element 21 on the large surface 11 allows it to be closer to the heat source, reducing the heat transfer distance from the inside to the detection element 21, thereby reducing heat loss and temperature decay, reducing measurement errors, improving sampling accuracy, reducing the risk of thermal runaway caused by abnormal battery temperature, and improving safety.

[0044] A detection element 21 can be connected to one of the large battery faces 11 of a single cell 10, or a detection element 21 can be installed on both large battery faces 11 of a single cell 10. By detecting from both sides, more comprehensive temperature data can be obtained, thereby improving the accuracy and reliability of temperature sampling. If a detection element 21 is connected to all large battery faces 11 of all single cells 10, comprehensive monitoring of all single cells 10 in the entire battery pack can be achieved.

[0045] Inside the battery pack, a circuit assembly 30 is also provided. The main body of the circuit assembly 30 is a flexible circuit board, which is connected to a electrode via a nickel strip. The electrode is then connected to the terminal of the corresponding individual battery cell 10 to achieve electrical connection with the battery. A connector 22 (such as...) is provided on the temperature sampling structure. Figure 2 (As shown) are electrically connected to the detection element 21 and the circuit assembly 30, respectively. Since the detection element 21 is located on the large surface 11 of the battery and the circuit assembly 30 is located on the top cover structure of the individual battery 10, and the two are far apart, the detection element 21 cannot be directly connected to the circuit assembly 30. Therefore, the detection element 21 is connected to the circuit assembly 30 via the connector 22, allowing the signal from the detection element 21 to be transmitted to the circuit assembly 30 via the connector 22 (e.g., ...). Figure 7 and Figure 8 (As shown).

[0046] Please see Figure 4 and Figure 5 In conjunction with the above embodiments, in some embodiments, the detection element 21 can be connected to the center of the battery surface 11 via the connector 22. It is understood that the detection element 21 can be positioned at the center of the battery surface 11 because the center of the battery surface 11 is closest to the central region inside the battery, resulting in less heat loss during heat transfer and the most significant heat transfer effect. Therefore, positioning the detection element 21 at this location can further improve the accuracy of temperature sampling of the individual battery cells 10 (if the detection element 21 is positioned at the edge of the battery surface 11, it may be affected by external environmental factors, such as heat sinks and cooling pipes, leading to temperature measurement deviations). The center of the battery surface 11 refers to the area around the center of the battery surface 11.

[0047] Please see Figure 2In conjunction with the above embodiments, in some embodiments, the connector 22 includes a support portion 221, a middle portion 222, and a first docking portion 223. The support portion 221 is disposed on one side of the single cell 10 in the first direction X, and the detection element 21 is connected to the large surface 11 of the battery through the support portion 221. The middle portion 222 and the support portion 221 are an integral structure, which is simple and convenient to process, can improve production efficiency, reduce costs, and the integral structure makes the connection between the two highly robust. The middle portion 222 includes a circuit 224, which is connected to the support portion 221. The first docking portion 223 is connected to the side of the circuit 224 opposite to the support portion 221, and the first docking portion 223 is connected to the circuit assembly 30.

[0048] It is understandable that, such as Figure 2 As shown, a support portion 221 is provided on the connector 22. The support portion 221 is connected to one side of the single cell 10 in the first direction X, that is, it is provided on the large surface 11 of the single cell 10. The support portion 221 can be made of metal and has high strength. The support portion 221 is used to support the detection element 21 and provides a certain degree of reinforcement to the detection element 21, reducing the probability of deformation or damage. The detection element 21 can be directly provided on the side of the support portion 221 away from the large surface 11 of the battery, or a groove can be formed on the side of the support portion 221 away from the large surface 11 of the battery, and the detection element 21 can be placed in the groove, which can provide a certain degree of protection for the detection element 21. The intermediate part 222 is connected to the carrier part 221. The signal on the detection element 21 can be transmitted to the intermediate part 222 through the carrier part 221. Specifically, the circuit 224 on the intermediate part 222 is connected to the carrier part 221. The signal on the detection element 21 can be transmitted to the circuit 224 through the carrier part 221, and then to the first docking part 223 through the circuit 224 (e.g., Figure 3 (As shown). Circuit 224 can be a flexible structure, such as a flexible circuit strip, with a certain deformation capability. It can be deformed and bent according to the internal spatial structure of the battery pack, which is beneficial to the arrangement of circuit 224 and facilitates the connection of connector 22 to the detection element 21 and circuit assembly 30. A first docking part 223 is provided on the side of circuit 224 away from the support part 221, and it is connected to the second docking part 31 on the circuit assembly 30 through the first docking part 223 (e.g., ...). Figure 8As shown in the diagram, the signal is transmitted to the circuit assembly 30. The first mating part 223 can be a pin terminal, and the second mating part 31 can be a plug-in connection terminal. The first mating part 223 and the second mating part 31 are plugged in to electrically connect them. This plug-in method facilitates the connection between the temperature sampling structure and the circuit assembly 30, reducing the difficulty of connection and disassembly. The first mating part 223 and the second mating part 31 can also be connected by welding, conductive adhesive, or other methods. After connecting the connector 22 to the circuit assembly 30, the circuit assembly 30 can be placed on the top surface of the individual battery 10. Then, aluminum bars connected to the circuit assembly 30 are welded to the corresponding terminals (the terminals are placed on the top surface of the individual battery 10), thus connecting the circuit assembly 30 to multiple individual batteries 10. After the circuit assembly 30 and multiple individual batteries 10 are combined into a battery pack, it can be directly installed into the battery pack housing.

[0049] Please see Figure 4 and Figure 5 In conjunction with the above embodiments, in some embodiments, the single battery cell 10 includes a connecting portion 12, which is disposed on the large surface 11 of the battery. The detection element 21 is connected to the support portion 221, and the support portion 221 is connected to the large surface 11 of the battery through the connecting portion 12.

[0050] It is understood that a connecting portion 12 can be provided on the individual battery cell 10. The connecting portion 12 is located on the large surface 11 of the battery, preferably in the middle of the large surface 11. The supporting portion 221 is connected to the large surface 11 of the battery through the connecting portion 12, thereby connecting the detection element 21 on the supporting portion 221 to the large surface 11 of the battery. The connecting portion 12 can be a snap-fit ​​structure provided on the large surface 11 of the battery, which can engage with the supporting portion 221; the connecting portion 12 can also be a sheet structure with an adhesive layer on the side facing away from the large surface 11, which can be bonded to the supporting portion 221; the connecting portion 12 can also be a metal plate, to which the supporting portion 221 can be directly welded.

[0051] like Figure 5 As shown, the connecting part 12 can be a magnetic coating, and the supporting part 221 can be made of magnetic metal. The connecting part 12 and the supporting part 221 can be connected by magnetic attraction, which is simple and facilitates the rapid assembly and disassembly of the temperature sampling structure. Simultaneously, the magnetic coating can be made to have a larger area, making the area of ​​the magnetic coating larger than the area of ​​the side of the supporting part 221 facing the large surface 11 of the battery. This facilitates the installation of the supporting part 221, and after the supporting part 221 is connected to the magnetic coating, it can be moved on its surface, allowing the installation position of the supporting part 221 to be adjusted as needed. Because the magnetic coating is thin, it occupies less space, avoiding excessive increase in the volume of the battery pack.

[0052] Please see Figure 1 and Figure 4 In conjunction with the above embodiments, in some embodiments, the battery pack further includes a plurality of separators 40, which are arranged at intervals along the first direction X. There is a placement space 41 between two adjacent separators 40. Each individual battery 10 is located in a placement space 41 and is connected to two adjacent separators 40. The detection element 21 is connected to the separator 40 on the side facing away from the battery surface 11.

[0053] It is understandable that, in order to space the individual cells 10 arranged along the first direction X, multiple spacers 40 can be provided to separate adjacent individual cells 10 (e.g., ...). Figure 6 As shown), multiple separators 40 are also arranged along the first direction X, and a placement space 41 for placing a single battery cell 10 is formed between two adjacent separators 40 (as shown). Figure 1 As shown, each individual battery cell 10 can be placed in a placement space 41. In this case, the individual battery cell 10 is located between two adjacent separators 40, and the two large battery surfaces 11 of the individual battery cell 10 are respectively connected to the two separators 40, such as the separators 40 being glued to the corresponding large battery surfaces 11. The detection element 21 is placed between the large battery surface 11 and the corresponding separator 40, and is connected to both. During the use of the battery pack, the individual battery cells 10 inside may expand, causing the large battery surface 11 to deform to a greater extent, making the large battery surface 11 bulge towards the separator 40, thereby squeezing the detection element 21. The large battery surface 11 and the detection element 21 fit more tightly, improving the reliability of the connection between the detection element 21 and the large battery surface 11, and preventing the detection element 21 from falling off the large battery surface 11.

[0054] The separator 40 can be a sheet or plate made of insulating material (such as polyamide, polycarbonate, etc.), which has a certain elasticity and compressibility. It can be compressed and deformed when subjected to external force, and can return to its original shape when the external force is removed. It can adapt to the dimensional changes caused by the expansion of the battery during charging and discharging, and ensure the reliability of long-term use. Alternatively, it can be a composite layer made of polymer material (such as polyimide, aramid paper, etc.) or ceramic filling material, which has good high temperature resistance and flame retardancy. Or, heat dissipation channels or heat dissipation fins can be provided inside the separator 40, which are connected to the battery cooling system (such as liquid cooling pipeline or air cooling structure) to improve heat dissipation efficiency and reduce the temperature rise of the single cell 10.

[0055] Please see Figure 9 In conjunction with the above embodiments, in some embodiments, the separator 40 has a receiving cavity 42 on the side facing the single cell 10, and at least part of the temperature sampling structure is disposed in the receiving cavity 42.

[0056] It is understood that a receiving cavity 42 can be provided on the side of the separator 40 facing the battery surface 11, and the number of separators 40 with receiving cavities 42 corresponds to the number of temperature sampling structures. If only one temperature sampling structure is provided, a receiving cavity 42 is provided on the separator 40 connected to the temperature sampling structure; if multiple temperature sampling structures are provided, receiving cavities 42 need to be provided on multiple separators 40 connected to the corresponding sampling components 20. At least a part of the temperature sampling structure can be placed in the corresponding receiving cavity 42, such as placing the detection element 21 on the temperature sampling structure in the receiving cavity 42, with the inner wall of the receiving cavity 42 contacting the side of the detection element 21 facing away from the battery surface 11. By accommodating at least a part of the detection element 21 in the receiving cavity 42, the space occupied by the temperature sampling structure in the battery pack can be reduced, and the space utilization rate can be improved.

[0057] Please see Figure 10 In conjunction with the above embodiments, in some embodiments, the separator 40 has a through hole 43 on one side along the second direction Y, the through hole 43 is connected to the receiving cavity 42, and the temperature sampling structure passes through the through hole 43.

[0058] It is understandable that by providing a through hole 43 on the separator 40 to connect to the receiving cavity 42, if at least a part of the temperature sampling structure is located inside the receiving cavity 42, since the circuit assembly 30 is located on one side of the single battery 10 along the second direction Y, when the temperature sampling structure is connected to the circuit assembly 30, it needs to extend at least partly along the second direction Y, that is, at least a part of the temperature sampling structure needs to extend towards the direction of the circuit assembly 30 to facilitate connection with the circuit assembly 30. Through the provided through hole 43, the temperature sampling structure can directly pass through the through hole 43 when extending, without bending during the process of extending from inside the receiving cavity 42 to the separator 40, which can reduce the setting length of the temperature sampling structure, facilitate the arrangement of the temperature sampling structure, and not occupy too much internal space of the battery pack, thereby improving the space utilization rate.

[0059] This application also provides an electrical device including the battery pack described above. This electrical device possesses all the technical features and beneficial effects of the battery pack. The battery pack is the power source for the electrical device. The electrical device can be a mobile phone, portable device, laptop computer, electric vehicle, electric car, ship, spacecraft, electric toy, or power tool, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0060] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0061] The temperature sampling structure and battery pack provided in the embodiments of this application have been described in detail above, and specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A temperature sampling structure, characterized in that, For detecting the temperature of a single cell (10), the single cell (10) has a circuit assembly (30) disposed on one side along the second direction (Y), and the temperature sampling structure includes: The detection element (21) is connected to the large surface (11) of the single cell (10) and is used to detect the temperature of the large surface (11) of the cell; The connector (22) is connected to the detection component (21) and the circuit assembly (30) respectively. The connector (22) includes a support part (221). The detection component (21) is connected to the battery surface (11) through the support part (221).

2. The temperature sampling structure according to claim 1, characterized in that, The connector (22) also includes: The intermediate part (222) includes a circuit (224) connected to the carrier part (221); A first docking part (223) is connected to the side of the circuit (224) away from the support part (221), and the first docking part (223) is used to connect with the circuit assembly (30).

3. The temperature sampling structure according to claim 2, characterized in that, The circuit (224) is a flexible structure.

4. The temperature sampling structure according to claim 2, characterized in that, The intermediate part (222) and the supporting part (221) are an integral structure.

5. A battery pack, characterized in that, include: Multiple individual cells (10) are arranged at intervals along a first direction (X), and each individual cell (10) has a large cell surface (11) on both sides along the first direction (X). A circuit assembly (30) is located on one side of the single cell (10) along the second direction (Y) and is connected to the single cell (10), wherein the second direction (Y) intersects the first direction (X); The temperature sampling structure according to any one of claims 1 to 4 is connected to the battery surface (11) and the circuit assembly (30) respectively.

6. The battery pack according to claim 5, characterized in that, The detection element (21) of the temperature sampling structure is connected to the middle of the large surface (11) of the battery via a connector (22).

7. The battery pack according to claim 5, characterized in that, The circuit assembly (30) includes a second docking part (31), which is connected to the first docking part (223) of the temperature sampling structure.

8. The battery pack according to claim 5, characterized in that, The single cell (10) includes a connecting part (12), which is disposed on the large surface (11) of the cell. The detection element (21) of the temperature sampling structure is connected to the support part (221), and the support part (221) is connected to the large surface (11) of the cell through the connecting part (12).

9. The battery pack according to claim 8, characterized in that, The connecting part (12) is a magnetic coating, and the magnetic coating is magnetically connected to the bearing part (221).

10. The battery pack according to claim 5, characterized in that, The battery pack also includes: Multiple separators (40) are arranged at intervals along the first direction (X), and there is a placement space (41) between two adjacent separators (40). Each single cell (10) is located in one of the placement spaces (41) and is connected to two adjacent separators (40). The detection element (21) of the temperature sampling structure is connected to the separator (40) on the side away from the large surface (11) of the battery. The separator (40) has a receiving cavity (42) on the side facing the single cell (10), and at least part of the temperature sampling structure is disposed in the receiving cavity (42).

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