Battery pack sampling device and battery pack

Abstract

The utility model provides a kind of battery pack sampling device and battery pack, battery pack sampling device includes circuit board, temperature sensing component, wiring harness and BMS module, multiple pads are provided on circuit board, temperature sensing component is used to carry out temperature detection to single cell, temperature sensing component includes multiple temperature sensing elements, circuit board has first connector, first connector has multiple connecting parts, multiple temperature sensing elements are electrically connected in different connecting parts respectively, the first end of wiring harness is replaceably connected with one of multiple connecting parts, the second end of wiring harness is detachably connected to BMS module.This application sets multiple temperature sensing elements on circuit board and is respectively adapted to connect in different connecting parts, by switching wiring harness and connecting in different connecting parts, different temperature sensing elements are adapted to carry out temperature acquisition, to further be able to solve the problem that existing battery temperature acquisition device is not convenient to replace when fault occurs in prior art.

Description

Technical Field

[0001] This utility model relates to the field of battery-related technology, specifically to a battery pack sampling device and a battery pack. Background Technology

[0002] Temperature monitoring plays a central role in the operation and management of battery systems, directly impacting battery safety and performance. Current battery temperature sampling methods primarily rely on two approaches, each with its inherent limitations.

[0003] Firstly, a common practice is to encapsulate the thermistor inside an aluminum terminal with epoxy resin, and then fix it to the busbar connecting the battery cell using ultrasonic welding, thereby transmitting the temperature signal to the battery management system (BMS). However, this encapsulation and welding process is complex and delicate, and is highly susceptible to causing microcracks in the thermistor body, which can lead to the failure of the temperature sensor.

[0004] Secondly, another strategy is to use surface-mount NTCs (negative temperature coefficient thermistors), which are mounted on flexible printed circuit boards (FPCs) or printed circuit boards (PCBs) using a reflow soldering process, and then placed on the top cover of the battery cell. While this arrangement simplifies some assembly processes, surface-mount NTCs are susceptible to external impacts or thermal stress during FPC manufacturing, transportation, and application, leading to damage or performance degradation. Furthermore, due to their sensitivity to humidity, if the sealant performance of the NTC deteriorates, ion migration will inevitably occur, causing changes in the NTC resistance and affecting the accuracy of temperature measurements.

[0005] The common drawback of these two solutions is that once the temperature sensor fails, traditional repair strategies are often limited to replacing the entire battery pack or battery module, which is not only time-consuming and labor-intensive but also costly.

[0006] As can be seen from the above, existing battery temperature acquisition devices are inconvenient to replace when they malfunction. Utility Model Content

[0007] The main purpose of this utility model is to provide a battery sampling device and a battery pack to solve the problem that it is inconvenient to replace the battery temperature acquisition device when it fails in the prior art.

[0008] To achieve the above objectives, according to one aspect of the present invention, a battery pack sampling device is provided. The battery pack sampling device includes a circuit board, a temperature sensing component, a wiring harness, and a BMS module. The circuit board is provided with multiple pads. The temperature sensing component is used to detect the temperature of a single battery cell. The temperature sensing component includes multiple temperature sensing elements, which are respectively disposed on the circuit board via pads. The circuit board has a first connector electrically connected to the temperature sensing component. The first connector has multiple connection portions. The multiple temperature sensing elements are respectively electrically connected to different connection portions. The first end of the wiring harness is alternatively connected to one of the multiple connection portions. The second end of the wiring harness is detachably connected to the BMS module. The temperature sensing elements are electrically connected to the BMS module via the wiring harness.

[0009] Furthermore, multiple temperature sensing elements are arranged sequentially along the length of the circuit board, with both ends of each temperature sensing element connected to a pad, and the ends of two adjacent temperature sensing elements that are close to each other are soldered onto the same pad.

[0010] Furthermore, the circuit board has a temperature acquisition circuit, and both ends of each temperature sensing element are connected to the connection part through the temperature acquisition circuit. The ends of two adjacent temperature sensing elements that are close to each other are connected to the same temperature acquisition circuit.

[0011] Furthermore, the wiring harness includes a second connector that is plugged into and mates with the first connector, the second connector having multiple sockets that are aligned with multiple connection parts; a wire body, the first end of which is alternatively connected to one of the multiple sockets and electrically connected to the corresponding connection part; and a third connector, the second end of which is connected to the third connector and is detachably plugged into the BMS module.

[0012] Furthermore, along the length of the circuit board, the first connector is located at the end facing the BMS module, the connection part is a metal terminal, the second connector is inserted and mated with the metal terminal, and at least a portion of the connection part extends into the second connector and is electrically connected to the first end of the line body.

[0013] Furthermore, the BMS module has a BMS connector on the side facing the circuit board, and a third connector is detachably plugged into the BMS connector for electrical connection.

[0014] Furthermore, multiple connectors are spaced apart along the width and / or thickness direction of the circuit board.

[0015] Furthermore, the circuit board is a flexible circuit board; and / or the temperature sensing element is a thermistor; and / or the temperature sensing element is connected to the pads via reflow soldering.

[0016] Furthermore, the battery pack sampling device also includes a frame disposed on a circuit board, the frame having a protective cavity, and multiple temperature sensing elements disposed inside the protective cavity; and / or a reinforcing plate and an adhesive, the reinforcing plate being disposed on the side of the circuit board away from the temperature sensing elements for supporting the circuit board, the surface of the reinforcing plate away from the circuit board being bonded to the battery cells of the battery pack by the adhesive, the adhesive forming an adhesive layer between the reinforcing plate and the battery cells.

[0017] According to another aspect of the present invention, a battery pack is provided, the battery pack including the above-described battery sampling device.

[0018] According to the technical solution of this utility model, the battery pack sampling device includes a circuit board, a temperature sensing component, a wiring harness, and a BMS module. The circuit board is provided with multiple pads. The temperature sensing component is used to detect the temperature of a single cell. The temperature sensing component includes multiple temperature sensing elements, which are respectively set on the circuit board through the pads. The circuit board has a first connector that is electrically connected to the temperature sensing component. The first connector has multiple connection parts. The multiple temperature sensing elements are electrically connected to different connection parts. The first end of the wiring harness is interchangeably connected to one of the multiple connection parts. The second end of the wiring harness is detachably connected to the BMS module. The temperature sensing elements are electrically connected to the BMS module through the wiring harness.

[0019] As can be seen from the above, the battery pack sampling device of this application uses multiple temperature sensing elements set on the circuit board and adapted to be connected to different connection parts. This application uses a wire harness that can be selectively connected to any connection part to transmit temperature signals. By switching the wire harness to connect to different connection parts, it can also be adapted to different temperature sensing elements for temperature acquisition. The structural design of this application ensures that even if a certain temperature sensing element fails, it can quickly switch to another temperature sensing element to maintain the continuity and accuracy of temperature acquisition. There is no need to replace the entire module or battery pack, which significantly improves the reliability and maintainability of the battery pack sampling device and reduces the after-sales maintenance costs and time consumption caused by temperature sensing element failure.

[0020] The multiple temperature sensing elements provided in this application offer multiple adaptable connection points for the wiring harness, thus improving connection flexibility. Furthermore, the use of a wiring harness between the circuit board and the BMS module not only enhances structural stability but also facilitates easy switching of temperature sensing elements, resulting in convenient operation and improved efficiency.

[0021] In this application, multiple temperature sensing elements are electrically connected to different connection parts, thereby ensuring that there is no interference between the multiple temperature sensing elements and improving the accuracy of temperature acquisition by the temperature sensing elements. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the battery pack sampling device provided in this application;

[0024] Figure 2 This is a schematic diagram of the installation structure of the battery pack sampling device and the battery cell provided in this application.

[0025] 10. Circuit board; 110. Solder pad; 120. Temperature acquisition circuit; 130. First connector; 131. Connecting part; 20. Temperature sensing element; 30. Wire harness; 310. Second connector; 311. Socket; 320. Third connector; 40. BMS module; 410. BMS connector; 50. Battery cell; 60. Frame; 70. Reinforcing plate; 80. Glue. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] To address the problem of inconvenient replacement of existing battery temperature acquisition devices when they malfunction, this application provides a battery pack comprising a battery group and a battery group sampling device for acquiring the temperature of the battery group cells 50. The battery group sampling device acquires the temperature of the battery group cells 50, thereby enabling real-time temperature monitoring of the cells 50 in the battery group to ensure the safety and stability of the battery pack.

[0030] The battery pack sampling device is located on the top cover of the battery cell 50 to collect the temperature of the battery cell 50.

[0031] In this embodiment, the battery pack sampling device is bonded to the top cover of the cell 50 via thermally conductive adhesive 80, thereby transferring heat to the temperature sensing element 20. The temperature information is then transmitted to the BMS module 40 via the circuit board 10 and wiring harness 30, thus completing the temperature acquisition and monitoring of the cell 50 in the battery pack.

[0032] like Figure 1 and Figure 2 As shown, the battery pack sampling device includes a circuit board 10, a temperature sensing component, a wiring harness 30, and a BMS module 40. The temperature sensing component is disposed above the battery cell for detecting the temperature of a single cell. The temperature sensing component includes multiple temperature sensing elements 20. The circuit board 10 has a first connector 130 electrically connected to the temperature sensing component. The first connector 130 has multiple connection portions 131, and the multiple temperature sensing elements 20 are electrically connected to different connection portions 131. The first end of the wiring harness 30 is interchangeably connected to one of the multiple connection portions 131. This application uses multiple temperature sensing elements... The arrangement of 20 provides multiple adaptable connection parts 131 for the connection of the wire harness 30, and allows switching between multiple connection parts 131, improving the flexibility of the connection. The second end of the wire harness 30 is detachably connected to the BMS module 40, and the temperature sensing element 20 is electrically connected to the BMS module 40 through the wire harness 30. This application adopts the means of setting the wire harness 30 between the circuit board 10 and the BMS module 40. The arrangement of the wire harness 30 not only improves the stability of the structure, but also facilitates the switching of the temperature sensing element 20, making the operation convenient and improving the efficiency of use.

[0033] The circuit board 10 has multiple pads 110 on its surface. Multiple temperature sensing elements 20 are connected to the circuit board 10 through the pads 110. Both ends of each temperature sensing element 20 are soldered to the pads 110 to fix it to the surface of the circuit board 10. This application uses reflow soldering to fix the temperature sensing elements 20 to the pads 110. The high precision and stability of reflow soldering technology ensure a firm connection between the temperature sensing elements 20 and the circuit board 10, while also improving the electrical performance of the connection.

[0034] Specifically, the battery pack sampling device of this application uses multiple temperature sensing elements 20 set on the circuit board 10 and adapted to be connected to different connection parts 131. This application uses a wire harness 30 to selectively connect to any connection part 131 to transmit temperature signals. By switching the wire harness 30 to different connection parts 131, it can also be adapted to different temperature sensing elements 20 for temperature acquisition. The structural design of this application ensures that even if a certain temperature sensing element 20 fails, it can quickly switch to another temperature sensing element 20 to maintain the continuity and accuracy of temperature acquisition without replacing the entire module or battery pack. This significantly improves the reliability and maintainability of the battery pack sampling device and reduces the after-sales maintenance costs and time consumption caused by the failure of the temperature sensing element 20.

[0035] In this embodiment, a temperature acquisition circuit 120 for conducting electricity is also provided on the surface of the circuit board 10. Both ends of each temperature sensing element 20 are connected to the connection part 131 through the temperature acquisition circuit 120, thereby realizing a one-to-one correspondence between the temperature sensing element 20 and the connection part 131.

[0036] In this application, multiple temperature sensing elements 20 are electrically connected to different connection parts 131, thereby ensuring that there is no interference between the multiple temperature sensing elements 20 and improving the accuracy of temperature acquisition by the temperature sensing elements 20.

[0037] In this embodiment, the multiple connecting portions 131 can be arranged along the width direction of the circuit board 10, or the multiple connecting portions 131 can be arranged at intervals in the thickness direction. Of course, the multiple connecting portions 131 can also be arranged at intervals along both the width and thickness of the circuit board 10. The multiple connecting portions 131 are arranged independently so that they can transmit temperature signals independently, which is convenient for adapting to different temperature sensing elements 20.

[0038] In this embodiment, the circuit board 10 is a flexible printed circuit board (FPC) to provide good flexibility, which facilitates its adaptation to the interior of different battery pack models, thereby improving its applicability and the flexibility of use in different scenarios; the temperature sensing element 20 is a thermistor (NTC) to improve the accuracy of temperature detection; and the BMS module 40 of this application is a battery management system.

[0039] like Figure 1 and Figure 2 As shown, multiple temperature sensing elements 20 are arranged sequentially along the length of the circuit board 10. Both ends of the temperature sensing elements 20 are connected to the pads 110, and the ends of two adjacent temperature sensing elements 20 that are close to each other are soldered to the same pad 110.

[0040] The temperature sensing element 20 is arranged along the length of the circuit board 10, and multiple temperature sensing elements 20 are arranged sequentially on the circuit board 10.

[0041] The temperature sensing element 20 is soldered to the circuit board 10 through the solder pad 110 to achieve electrical connection with the circuit board 10. Two adjacent temperature sensing elements 20 are soldered to the same solder pad 110. This arrangement can reduce the number of temperature acquisition circuits 120 on the circuit board 10, thereby reducing costs.

[0042] In this embodiment, the circuit board 10 has a temperature acquisition circuit 120. Both ends of each temperature sensing element 20 are connected to the connection part 131 through the temperature acquisition circuit 120. The ends of two adjacent temperature sensing elements 20 that are close to each other are connected to the same temperature acquisition circuit 120. Adjacent temperature sensing elements 20 share the temperature acquisition circuit 120 to reduce the number of temperature acquisition circuits 120, which helps to reduce costs.

[0043] The temperature acquisition circuit 120 shared by the two temperature sensing elements 20 can have its ends in contact with the two temperature sensing elements 20 respectively; or the ends of the temperature acquisition circuit 120 can be in contact with the pad 110 for conductive conduction.

[0044] In this embodiment, two temperature acquisition circuits 120 electrically connected to the same temperature sensing element 20 are connected to a connection part 131, which can be a slot or a protrusion at the output end of a circuit board connector.

[0045] In one specific embodiment of this invention, two temperature sensing elements 20 are provided, and three corresponding solder pads 110 are provided. The ends of the two temperature sensing elements 20 that are close to each other are soldered to the same solder pad 110, and the ends of the two temperature sensing elements 20 that are far apart from each other are fixed to the circuit board 10 through the solder pads 110. When one of the temperature sensing elements 20 fails, the temperature of the battery cells 50 of the normal battery pack can be collected by switching to the temperature sensing element 20, avoiding the problem of complicated disassembly and assembly, optimizing the operating efficiency, and improving the real-time monitoring effect of the temperature sensing element 20.

[0046] There are two temperature sensing elements 20 and three corresponding temperature acquisition circuits 120. Two adjacent temperature acquisition circuits 120 are connected to a connection part 131 so that the two temperature sensing elements 20 are connected to the two connection parts 131 in a one-to-one correspondence.

[0047] like Figure 1 and Figure 2As shown, a frame 60 is provided on the circuit board 10. The frame 60 has a protective cavity, and multiple temperature sensing elements 20 are disposed inside the protective cavity. By disposing of multiple temperature sensing elements 20 inside the protective cavity, the frame 60 can protect and fix the multiple temperature sensing elements 20, avoiding damage to the temperature sensing elements 20 during installation or other assembly processes.

[0048] The frame 60 is a cylindrical structure. The first open end of the cylindrical structure is connected to the circuit board 10, and the second open end extends away from the circuit board 10, thus forming a protective cavity with a groove structure through the cooperation of the frame 60 and the circuit board 10. The opening of the frame 60 can be circular, elliptical, or rectangular. In this embodiment, the opening of the frame 60 is rectangular.

[0049] In this embodiment, the frame 60 is bonded to the surface of the circuit board 10, or the frame 60 can be fixed to the surface of the circuit board 10 by fasteners such as screws.

[0050] In this embodiment, the battery pack sampling device further includes a protective adhesive filled inside the protective cavity. The protective adhesive covers multiple temperature sensing elements 20 to further fix and protect the multiple temperature sensing elements 20. Specifically, after fixing the multiple temperature sensing elements 20 inside the protective cavity, the protective adhesive is injected into the protective cavity to achieve the effect of the protective adhesive covering the multiple temperature sensing elements 20. The protective adhesive is a UV adhesive.

[0051] like Figure 1 and Figure 2 As shown, the battery pack sampling device also includes a reinforcing plate 70 and an adhesive 80. The reinforcing plate 70 is disposed on the side of the circuit board 10 away from the temperature sensing element 20 and is used to support the circuit board 10. The surface of the reinforcing plate 70 away from the circuit board 10 is bonded to the battery cell 50 of the battery pack through the adhesive 80. The adhesive 80 forms an adhesive layer between the reinforcing plate 70 and the battery cell 50.

[0052] Among them, colloid 80 is a thermally conductive material used for heat conduction.

[0053] Specifically, the reinforcing plate 70 supports the circuit board 10, that is, it supports the flexible circuit board 10 of this application to facilitate the connection between the temperature sensing element 20 and the circuit board 10. Under the support of the reinforcing plate 70, the flatness of the circuit board 10 can be guaranteed, thereby facilitating the installation and fixing of the circuit board 10.

[0054] In this embodiment, the reinforcing plate 70 is bonded to the circuit board 10. This bonding method secures the reinforcing plate 70 and the circuit board 10 together, facilitating operation and providing good fixation. Specifically, the reinforcing plate 70 and the circuit board 10 are bonded with thermally conductive adhesive to achieve a thermally conductive connection between the reinforcing plate 70 and the flexible circuit board 10.

[0055] The reinforcing plate 70 is bonded to the top cover of the battery cell 50 by adhesive 80 on the side away from the circuit board 10, so that the reinforcing plate 70 can contact the battery cell 50 through adhesive 80. The bonding structure not only realizes temperature transfer, but also helps to improve the stability of the structure to ensure the accuracy of temperature acquisition.

[0056] In this embodiment, the reinforcing plate 70 is made of a thermally conductive material to facilitate heat conduction through the reinforcing plate 70, thereby facilitating the acquisition of the temperature of the battery cell 50.

[0057] like Figure 1 and Figure 2 As shown, the wiring harness 30 includes a second connector 310, a wire body, and a third connector 320. The second connector 310 is plugged into the first connector 130. The second connector 310 has a plurality of sockets 311 that are aligned with the plurality of connection parts 131. The first end of the wire body is replaceably connected to one of the plurality of sockets 311. The first end of the wire body is electrically connected to the corresponding connection part 131. The second end of the wire body is connected to the third connector 320. The third connector 320 is detachably plugged into the BMS module 40.

[0058] The two ends of the cable body are connected to the second connector 310 and the third connector 320 respectively. The second connector 310 is connected to the first connector 130, and the third connector 320 is connected to the BMS module 40.

[0059] After the first end of the wire body extends into the socket 311, it can form an electrical connection with the corresponding connection part 131, thereby enabling the temperature sensing element 20 to be electrically connected to the BMS module 40 through the connection part 131 and the wire harness 30.

[0060] When the temperature sensing element 20 malfunctions, the first end of the wire body can be unplugged from the connector 311 (either manually or with a tool), and then the first end of the wire body can be plugged into another connector 311 to activate the corresponding temperature sensing element 20 for temperature acquisition. This wiring harness 30 design enhances flexibility and maintainability through replaceable and detachable connections. When the wiring harness 30 or connector is damaged, it can be quickly replaced without disassembling the entire battery system, reducing maintenance costs and time. Especially for on-site maintenance and upgrades of the battery system, where internal space is limited and large-scale disassembly is difficult, this design significantly improves maintenance efficiency and reduces downtime.

[0061] In this embodiment, the second connector 310 and the third connector 320 are both wire-to-board connectors, and the first connector 130 is a circuit board connector.

[0062] like Figure 1 and Figure 2 As shown, along the length of the circuit board 10, the first connector 130 is located at the end facing the BMS module 40.

[0063] Specifically, the connecting part 131 is a metal terminal, and the second connector 310 is inserted into the metal terminal. At least a portion of the connecting part 131 extends into the second connector 310 and is electrically connected to the first end of the wire body. The metal terminal achieves conductivity after contacting the wire body.

[0064] In this embodiment, the first connector 130 is positioned on the side facing the BMS module 40, which helps to reduce the length of the wiring harness 30 and thus improves the assembly efficiency of the overall structure. If the wiring harness 30 is too long, it may be inconvenient to install the wiring inside the battery pack.

[0065] In this embodiment, the BMS module 40 has a BMS connector 410 on the side facing the circuit board 10, and a third connector 320 is detachably plugged into the BMS connector 410 for electrical connection. The BMS connector 410 and the third connector 320 are plugged into each other, and through standardized connector connection settings, an electrical connection between the wiring harness 30 and the BMS module 40 is ensured, achieving plug-in mating and thus enabling signal transmission. The first connector 130 and the BMS connector 410 are positioned opposite each other to facilitate connection with the wiring harness 30, increasing the installation efficiency between the wiring harness 30, the circuit board 10, and the BMS module 40.

[0066] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0067] The battery pack sampling device of this application employs multiple temperature sensing elements 20 set on the circuit board 10 and adapted to be connected to different connection parts 131. This application uses a wiring harness 30 to selectively connect to any connection part 131 for temperature signal transmission. By switching the wiring harness 30 to different connection parts 131, it can also be adapted to different temperature sensing elements 20 for temperature acquisition. The structural design of this application ensures that even if one temperature sensing element 20 fails, it can quickly switch to another temperature sensing element 20 to maintain the continuity and accuracy of temperature acquisition without replacing the entire module or battery pack. This significantly improves the reliability and maintainability of the battery pack sampling device and reduces the after-sales maintenance costs and time consumption caused by the failure of the temperature sensing element 20.

[0068] The multiple temperature sensing elements 20 provided in this application provide multiple adaptable connection parts 131 for the connection of the wiring harness 30, thereby improving the flexibility of the connection. The wiring harness 30 is provided between the circuit board 10 and the BMS module 40. The wiring harness 30 not only improves the stability of the structure, but also facilitates the switching of temperature sensing elements 20, making the operation convenient and improving the efficiency of use.

[0069] In this application, multiple temperature sensing elements 20 are electrically connected to different connection parts 131, thereby ensuring that there is no interference between the multiple temperature sensing elements 20 and improving the accuracy of temperature acquisition by the temperature sensing elements 20.

[0070] Obviously, the embodiments described above are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0071] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0072] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0073] 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 battery pack sampling device, characterized in that, include: Circuit board (10), wherein a plurality of pads (110) are provided on the circuit board (10); A temperature sensing assembly is used to detect the temperature of a single cell (50). The temperature sensing assembly includes a plurality of temperature sensing elements (20). The plurality of temperature sensing elements (20) are respectively disposed on the circuit board (10) through the pads (110). The circuit board (10) has a first connector (130) electrically connected to the temperature sensing assembly. The first connector (130) has a plurality of connecting parts (131). The plurality of temperature sensing elements (20) are respectively electrically connected to different connecting parts (131). A wire harness (30), the first end of which is alternatively connected to one of the plurality of connectors (131); BMS module (40), the second end of the wiring harness (30) is connected to the BMS module (40), and the temperature sensing element (20) is electrically connected to the BMS module (40) through the wiring harness (30).

2. The battery pack sampling device according to claim 1, characterized in that, Multiple temperature sensing elements (20) are arranged sequentially along the length of the circuit board (10). Both ends of the temperature sensing elements (20) are connected to the pads (110), and the ends of two adjacent temperature sensing elements (20) that are close to each other are soldered to the same pad (110).

3. The battery pack sampling device according to claim 2, characterized in that, The circuit board (10) has a temperature acquisition circuit (120), and both ends of each temperature sensing element (20) are connected to the connection part (131) through the temperature acquisition circuit (120). The ends of two adjacent temperature sensing elements (20) that are close to each other are connected to the same temperature acquisition circuit (120).

4. The battery pack sampling device according to claim 1, characterized in that, The wire harness (30) includes: The second connector (310) is inserted into the first connector (130), and the second connector (310) has a plurality of sockets (311) that are aligned with the plurality of connecting parts (131); The first end of the wire body can be alternatively connected to one of a plurality of sockets (311), and the first end of the wire body is electrically connected to the corresponding connecting part (131); The third connector (320) is connected to the second end of the line body and is detachably plugged into the BMS module (40).

5. The battery pack sampling device according to claim 4, characterized in that, Along the length of the circuit board (10), the first connector (130) is located at one end facing the BMS module (40), the connecting part (131) is a metal terminal, the second connector (310) is inserted into the metal terminal, and at least a portion of the connecting part (131) extends into the second connector (310) and is electrically connected to the first end of the line body.

6. The battery pack sampling device according to claim 4, characterized in that, The BMS module (40) has a BMS connector (410) on the side facing the circuit board (10), and the third connector (320) is detachably plugged into the BMS connector (410) for electrical connection.

7. The battery pack sampling device according to claim 1, characterized in that, The plurality of connecting portions (131) are spaced apart along the width and / or thickness direction of the circuit board (10).

8. The battery pack sampling device according to any one of claims 1 to 7, characterized in that, The circuit board (10) is a flexible circuit board; and / or The temperature sensing element (20) is a thermistor.

9. The battery pack sampling device according to any one of claims 1 to 7, characterized in that, The battery pack sampling device also includes: A frame (60) is disposed on the circuit board (10), the frame (60) having a protective cavity, and a plurality of temperature sensing elements (20) are disposed inside the protective cavity; and / or A reinforcing plate (70) and an adhesive (80) are provided. The reinforcing plate (70) is disposed on the side of the circuit board (10) away from the temperature sensing element (20) to support the circuit board (10). The surface of the reinforcing plate (70) away from the circuit board (10) is bonded to the battery cell (50) through the adhesive (80). The adhesive (80) forms an adhesive layer between the reinforcing plate (70) and the battery cell (50).

10. A battery pack, characterized in that, The battery pack includes a battery pack sampling device according to any one of claims 1 to 9.

Images