Battery pack and electric device

Abstract

The application relates to the technical field of batteries, and provides a battery pack and a power utilization device. The battery pack disclosed by the application comprises a cold plate, a temperature sensing base arranged on the cold plate, and a temperature sensing assembly arranged in a cavity of the temperature sensing base; the bottom of the temperature sensing base is provided with a contact part which extends into the cold plate and is in contact with cooling liquid in the cold plate; the temperature sensing assembly is coated with an insulating layer, and the temperature sensing assembly is arranged corresponding to a liquid inlet of the cold plate and corresponding to an explosion-proof valve of the battery pack. The battery pack disclosed by the application can improve the temperature control effect of the whole battery pack, realize thermal runaway alarm, and has good use safety.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Technology

[0002] In related technologies, liquid cooling is a common cooling method for battery packs. However, this method has a problem: if there are pipes inside the pack, coolant leakage is likely to occur. Therefore, using a large cold plate with no pipes inside the pack is a comparative advantage. However, this method also has a problem: it is difficult to collect the temperature of the inlet water inside the pack.

[0003] Meanwhile, collecting cell temperature data for alarm purposes is a crucial means of preventing thermal runaway. However, existing battery packs typically use methods such as FPC and FDC to collect cell temperature data. These methods have poor thermal protection; in the event of thermal runaway, FPCs and FDCs are easily burned out, leading to abnormal temperature data collection and difficulty in reporting thermal runaway signals. Therefore, the safety of existing battery packs needs to be improved. Utility Model Content

[0004] In view of this, this application aims to provide a battery pack that improves safety in use.

[0005] To achieve the above objectives, the technical solution of this application is implemented as follows: A battery pack includes a cold plate, a temperature sensing base disposed on the cold plate, and a temperature sensing component disposed in a cavity of the temperature sensing base. The bottom of the temperature-sensing base is provided with a contact part that extends into the cold plate, and the contact part is in contact with the coolant in the cold plate; The temperature sensing component is covered with an insulating layer, and the temperature sensing component is set to correspond to the liquid inlet of the cold plate, and / or the temperature sensing component is set to correspond to the explosion-proof valve of the battery pack.

[0006] Furthermore, the temperature sensing component includes a temperature sensing unit disposed on the temperature sensing base, and an electrical connector connected to the temperature sensing unit, wherein the electrical connector is covered with the insulating layer and is used to connect to the control module.

[0007] Furthermore, the temperature-sensing base is provided with an opening communicating with the cavity; a cover plate is provided between the electrical connector and the temperature-sensing unit, the cover plate being detachably connected to the temperature-sensing base and sealing the opening.

[0008] Furthermore, the cover plate and the temperature sensing base are connected by fasteners; and / or, a sealing element is provided between the cover plate and the temperature sensing base, the sealing element being used to seal the opening.

[0009] Furthermore, the electrical connector includes a connecting wire harness connected to the temperature sensing unit, and a connector disposed at the end of the connecting wire harness away from the temperature sensing unit, the connecting wire harness being covered with the insulating layer; and / or, the temperature sensing unit is a temperature sensor.

[0010] Furthermore, the cold plate includes a heat exchange plate and a flow channel plate that are fastened together, and a flow channel formed between the heat exchange plate and the flow channel plate. The heat exchange plate is provided with a through hole communicating with the flow channel, and the contact portion extends into the through hole.

[0011] Furthermore, the cross-section of the contact portion is semi-circular or rectangular and adapted to the through hole; and / or, the temperature sensing base is welded together with the heat exchange plate.

[0012] Furthermore, it also includes a frame disposed on the cold plate, the cold plate and the frame forming a battery cavity for mounting the cell module; the battery pack explosion-proof valve is disposed on the frame, the temperature sensing component is located inside the frame, the liquid inlet / outlet component of the cold plate is located outside the frame and along the length direction of the battery pack, the temperature sensing component and the battery pack explosion-proof valve are correspondingly disposed.

[0013] Furthermore, it also includes a bottom protective plate and a battery pack cover connected to the frame. The bottom protective plate is located below the cold plate, and the battery pack cover is used to seal the battery cavity. A sealing strip is provided between the battery pack cover and the frame, and / or, a sealing strip is provided between the bottom protective plate and the cold plate.

[0014] Compared with related technologies, this application has the following advantages: (1) The battery pack described in this application has a contact part at the bottom of the temperature sensing base, which contacts the coolant in the cold plate, and the temperature sensing component is set to the inlet of the cold plate, which can realize the detection of the temperature of the coolant at the inlet of the cold plate, so as to improve the temperature control effect of the whole pack and reduce the risk of thermal runaway. At the same time, the temperature sensing component is set to the explosion-proof valve of the battery pack, which can provide the temperature of the exhaust at the explosion-proof valve of the battery pack. The temperature sensing component is covered with an insulating layer, which can prevent the problem of abnormal temperature acquisition and difficulty in reporting thermal runaway signal due to burning during thermal runaway, thereby enabling rapid thermal runaway alarm, which can help improve the safety of the battery pack.

[0015] (2) The temperature sensing component is mainly composed of a temperature sensing unit and an electrical connector. It has a simple structure and is easy to manufacture. The insulation layer is placed on the electrical connector, which can help prevent the electrical connector from being burned out, thus causing abnormal temperature acquisition.

[0016] (3) By setting openings and detachably connecting the cover plate and the temperature sensing base, it is convenient to assemble and disassemble the temperature sensing unit and the temperature sensing base.

[0017] (4) The cover plate and the temperature sensing base are connected by fasteners, which not only facilitates the convenient assembly and disassembly of the temperature sensing unit and the temperature sensing base, but also improves the connection stability, and is low in cost and easy to maintain after-sales. At the same time, the sealing element is provided to ensure the sealing performance between the cover plate and the temperature sensing base.

[0018] (5) A connector is provided to facilitate connection between the temperature sensing unit and the control module. Furthermore, the temperature sensing unit uses a temperature sensor, which is a mature product with low cost and facilitates after-sales maintenance.

[0019] (6) The through hole is set on the heat exchange plate. The design is reasonable and the contact part extends into the through hole, which can facilitate the temperature sensing unit to detect the temperature of the coolant through the temperature sensing base and help ensure the accuracy of the detection.

[0020] (7) The cross-section of the contact part is semi-circular or rectangular and is adapted to the through hole. The structure is simple and easy to prepare. At the same time, it is also conducive to the formation of a positioning structure between the contact part and the through hole, which facilitates the assembly between the temperature sensing base and the heat exchange plate. Furthermore, the temperature sensing base and the heat exchange plate are welded together, which helps to ensure the reliability of the connection between the two and the sealing performance between them.

[0021] (8) The inlet and outlet components of the cold plate are located outside the frame, which means that there are no pipes and quick-connect structures inside the battery pack. This can effectively prevent the leakage of coolant inside the pack, thereby reducing the risk of insulation failure or thermal runaway.

[0022] (9) A sealing strip is provided between the top cover of the battery pack and the frame, and a sealing strip is provided between the bottom guard plate and the cold plate, which can ensure the overall sealing performance of the battery pack and thus help improve the quality of the battery pack.

[0023] This application also proposes an electrical device in which a battery pack as described above is provided.

[0024] The electrical device described in this application is equipped with the aforementioned battery pack, which has the same beneficial effects as conventional technology, and will not be described in detail here. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings: Figure 1 This is an exploded view of the battery pack described in the embodiments of this application; Figure 2 This is a schematic diagram of the frame structure described in an embodiment of this application; Figure 3 This is an exploded view of the cold plate described in the embodiments of this application; Figure 4This is a partial exploded view of the temperature sensing component, temperature sensing base, and cold plate during assembly as described in the embodiments of this application; Figure 5 This is a schematic diagram of the internal structure of the temperature sensing component, temperature sensing base, and cold plate during assembly according to the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the temperature sensing component described in the embodiments of this application; Explanation of reference numerals in the attached figures: 100. Cold-rolled steel plate; 1000, Flow channel; 101, Heat exchange plate; 1011, Through hole; 102, Flow channel plate; 103, Liquid inlet / outlet assembly; 1031, Liquid inlet port; 1032, Liquid outlet port; 200. Temperature-sensitive base; 201. Cavity; 2011. Opening; 202. Contact part; 203. Screw hole; 300. Temperature sensing component; 301. Temperature sensing unit; 302. Connecting wire harness; 303. Connector; 304. Cover plate; 305. Fastener; 306. Seal; 400, border; 401. Front beam; 402. Rear beam; 403. Side beam; 404. Crossbeam; 500, bottom protective plate; 600, battery pack top cover; 700, battery pack explosion-proof valve; 800, sealing strip; 900, battery cell assembly. Detailed Implementation

[0026] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0030] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0032] An embodiment of the first aspect of this application provides a battery pack with improved safety in use.

[0033] In related technologies, liquid cooling is a common cooling method for battery packs. However, this method has a problem: if there are pipes inside the pack, coolant leakage is likely to occur. Therefore, using a large 100mm cold plate and a pipe-free design inside the pack is a competitive advantage. However, this method also has a problem: it is difficult to collect the inlet water temperature inside the pack.

[0034] Meanwhile, collecting cell temperature data for alarm purposes is a crucial means of preventing thermal runaway. However, existing battery packs typically use methods such as FPC (Flexible Printed Circuit) and FDC (Flexible Die-Cut Circuit Board) for cell temperature data collection. These methods offer poor thermal protection; in the event of thermal runaway, the FPC and FDC are easily burned out, leading to abnormal temperature data collection and difficulty in reporting thermal runaway signals. Therefore, the safety of existing battery packs needs further improvement.

[0035] In view of this, in order to overcome the shortcomings of the related technology, the battery pack of this embodiment combines... Figures 1 to 6 As shown, the overall design includes a cold plate 100, a temperature sensing base 200 disposed on the cold plate 100, and a temperature sensing component 300 disposed in the cavity 201 of the temperature sensing base 200.

[0036] The temperature sensing base 200 has a contact portion 202 at its bottom that extends into the cold plate 100, and the contact portion 202 contacts the coolant in the cold plate 100. The temperature sensing component 300 is covered with an insulating layer and is positioned corresponding to the liquid inlet of the cold plate 100, and is also positioned corresponding to the battery pack explosion-proof valve 700.

[0037] Therefore, by providing a contact part 202 at the bottom of the temperature sensing base 200, which contacts the coolant in the cold plate 100, and by setting the temperature sensing component 300 corresponding to the inlet of the cold plate 100, the temperature of the coolant at the inlet of the cold plate 100 can be detected, thereby improving the overall temperature control effect of the battery pack and reducing the risk of thermal runaway. At the same time, the temperature sensing component 300 is set corresponding to the battery pack explosion-proof valve 700, which can provide the exhaust temperature at the battery pack explosion-proof valve 700. Furthermore, the temperature sensing component 300 is covered with an insulating layer, which can prevent the problem of abnormal temperature acquisition and difficulty in reporting thermal runaway signals due to burning during thermal runaway, thereby enabling rapid thermal runaway alarm and improving the safety of battery pack use.

[0038] Based on the above overview, specifically, in some exemplary embodiments, the temperature sensing base 200 is made of aluminum to provide excellent thermal conductivity and ensure the accuracy of the temperature sensing component 300 in detecting the coolant temperature. Meanwhile, the insulating layer is made of mica paper to enhance the thermal protection of the temperature sensing component 300.

[0039] It should be noted that the direction-related descriptions in this embodiment are merely illustrative examples. In actual implementation, the direction descriptions in this embodiment will vary depending on the orientation within the battery pack; that is, the directions in this embodiment refer to a relative coordinate system based on the battery pack.

[0040] Continue to combine Figure 4 and Figure 6 As shown, in some exemplary embodiments, the temperature sensing component 300 includes a temperature sensing unit 301 disposed on the temperature sensing base 200, and an electrical connector connected to the temperature sensing unit 301, wherein the electrical connector is covered with an insulating layer and is used to connect to the control module.

[0041] Understandably, the temperature sensing component 300 mainly consists of a temperature sensing unit 301 and electrical connectors. It has a simple structure, is easy to manufacture, and the insulating layer covering the electrical connectors helps prevent them from burning out and causing abnormal temperature acquisition. The control module here could be, for example, a BMS (Battery Management Unit).

[0042] Continue to combine Figure 5As shown, in some exemplary embodiments, the temperature-sensing base 200 has an opening 2011 communicating with the cavity 201, and a cover plate 304 is provided between the electrical connector and the temperature-sensing unit 301. The cover plate 304 is detachably connected to the temperature-sensing base 200 and covers the opening 2011. By providing the opening 2011 and the cover plate 304 being detachably connected to the temperature-sensing base 200, the assembly and disassembly of the temperature-sensing unit 301 and the temperature-sensing base 200 can be facilitated.

[0043] Meanwhile, in some exemplary embodiments, the cover plate 304 and the temperature sensing base 200 of this embodiment are connected by fasteners 305, which not only facilitates the convenient assembly and disassembly of the temperature sensing unit 301 and the temperature sensing base 200, but also improves the connection stability, and is low in cost and easy to maintain after-sales.

[0044] Specifically, the fastener 305 can be a screw or bolt. In order to facilitate the installation of the cover plate 304 and the temperature sensing base 200 through the fastener 305, the temperature sensing base 200 is provided with a screw hole 203 and the cover plate 304 is provided with a through hole. The fastener 305 passes through the through hole and is screwed into the screw hole 203 to realize the screw connection between the cover plate 304 and the temperature sensing base 200.

[0045] Continue to combine Figure 5 and Figure 6 As shown, in some exemplary embodiments, a seal 306 is provided between the cover plate 304 and the temperature sensing base 200, the seal 306 being used to seal the opening 2011. The seal 306 is provided here to ensure a tight seal between the cover plate 304 and the temperature sensing base 200.

[0046] In specific implementations, in some exemplary embodiments, the electrical connector includes a connecting harness 302 connected to the temperature sensing unit 301, and a connector 303 disposed at the end of the connecting harness 302 away from the temperature sensing unit 301, the connecting harness 302 being covered with an insulating layer.

[0047] Here, by providing connector 303, the temperature sensing unit 301 can be easily connected to the control module. Specifically, the connecting wire harness 302 passes through the cover plate 304, and the sealing element 306 is located at the bottom of the cover plate 304, that is, between the cover plate 304 and the temperature sensing base 200, and the sealing element 306 can be a sealing ring.

[0048] Furthermore, in some exemplary embodiments, the temperature sensing unit 301 is a temperature sensor. The temperature sensing unit 301 uses a temperature sensor, which is a mature product, inexpensive, and easy to maintain.

[0049] In addition, continue to combine Figure 1 , Figures 3 to 5As shown, in some exemplary embodiments, the cold plate 100 includes a heat exchange plate 101 and a flow channel plate 102 that are fastened together, and a flow channel 1000 formed between the heat exchange plate 101 and the flow channel plate 102. The heat exchange plate 101 is provided with a through hole 1011 communicating with the flow channel 1000, and the contact portion 202 extends into the through hole 1011.

[0050] It is understandable that the through hole 1011 is reasonably designed to be placed on the heat exchange plate 101, and the contact part 202 extends into the through hole 1011, which can facilitate the temperature sensing unit 301 to detect the temperature of the coolant through the temperature sensing base 200 and help ensure the accuracy of the detection.

[0051] Continue to combine Figure 4 As shown, in some exemplary embodiments, the cold plate 100 is provided with a liquid inlet / outlet assembly 103, which includes a liquid inlet port 1031 and a liquid outlet port 1032. In this embodiment, the temperature sensing base 200 is preferably provided corresponding to the liquid inlet port 1031 to realize the arrangement scheme corresponding to the liquid inlet of the cold plate 100, thereby realizing the detection of the inlet coolant temperature of the cold plate 100, so as to improve the overall temperature control effect and reduce the risk of thermal runaway.

[0052] In some exemplary embodiments, the contact portion 202 of this embodiment has a semi-circular or rectangular cross-section and is adapted to the through hole 1011. This design simplifies the structure, facilitates the fabrication of the contact portion 202, and also helps the contact portion 202 and the through hole 1011 form a positioning structure, which is convenient for the assembly between the temperature sensing base 200 and the heat exchange plate 101. Specifically, the contact portion 202 can be a protrusion integrally formed with the temperature sensing base 200.

[0053] Furthermore, in some exemplary embodiments, the temperature sensing base 200 is welded to the heat exchange plate 101, specifically by brazing. The main advantage of this arrangement is that it helps ensure the reliability of the connection between the two, as well as the sealing performance between them.

[0054] In addition, continue to combine Figure 1 and Figure 2 As shown, in some exemplary embodiments, a frame 400 is also included on the cold plate 100, and the cold plate 100 and the frame 400 enclose a battery cavity for mounting the battery cell module. A battery pack explosion-proof valve 700 is disposed on the frame 400, a temperature sensing component 300 is located inside the frame 400, and the liquid inlet / outlet assembly 103 of the cold plate 100 is located outside the frame 400. Along the length of the battery pack, the temperature sensing component 300 and the battery pack explosion-proof valve 700 are correspondingly arranged.

[0055] By having the inlet / outlet liquid assembly 103 of the cold plate 100 located outside the frame 400, the battery pack can be free of pipes and quick-connect structures, thereby effectively preventing coolant leakage and reducing the risk of insulation failure or thermal runaway.

[0056] In a specific implementation, the frame 400 of this embodiment includes a front beam 401 and a rear beam 402 arranged opposite to each other along the length direction, and two side beams 403 disposed between the front beam 401 and the rear beam 402. In addition, a plurality of crossbeams 404 are arranged at intervals along the length direction. The two ends of each crossbeam 404 along the width direction are respectively connected to the two side beams 403. The battery cavity can be specifically formed by each crossbeam 404 and each side beam 403 to place the battery cell assembly 900. An electrical cavity is formed between each side beam 403, the front beam 401 and the adjacent crossbeam 404, and between each side beam 403, the rear beam 402 and the adjacent crossbeam 404 to place electrical components such as high-voltage distribution boxes and battery management units.

[0057] Furthermore, in some exemplary embodiments, the battery pack of this embodiment also includes a bottom protective plate 500 connected to the frame 400 and a battery pack top cover 600. The bottom protective plate 500 is located below the cold plate 100, and the battery pack top cover 600 is used to seal the battery cavity. A sealing strip 800 is provided between the battery pack top cover 600 and the frame 400, and a sealing strip 800 is also provided between the bottom protective plate 500 and the cold plate 100. This arrangement can ensure the overall sealing performance of the battery pack, thereby improving the quality of the battery pack.

[0058] It is worth noting that, for the battery pack of this embodiment, based on the above exemplary implementations, in specific implementation, as a preferred embodiment, as shown in the figure, it may include, for example, a cold plate 100, a temperature sensing base 200 disposed on the cold plate 100, and a temperature sensing component 300 disposed in the cavity 201 of the temperature sensing base 200.

[0059] The temperature sensing base 200 has a contact part 202 at its bottom that extends into the cold plate 100, and the contact part 202 contacts the coolant in the cold plate 100; at the same time, the temperature sensing component 300 is covered with an insulating layer, and the temperature sensing component 300 is set to correspond to the liquid inlet of the cold plate 100, and the temperature sensing component 300 is set to correspond to the battery pack explosion-proof valve 700.

[0060] The temperature sensing component 300 includes a temperature sensing unit 301 disposed on the temperature sensing base 200, and an electrical connector connected to the temperature sensing unit 301. The electrical connector is covered with an insulating layer and is used to connect to the control module.

[0061] The temperature sensing base 200 has an opening 2011 that communicates with the cavity 201; specifically, a cover plate 304 is provided between the electrical connector and the temperature sensing unit 301. The cover plate 304 is detachably connected to the temperature sensing base 200 and covers the opening 2011.

[0062] The cover plate 304 and the base are connected by fasteners 305; at the same time, a sealing element 306 is provided between the cover plate 304 and the base, which is used to seal the opening 2011.

[0063] The electrical connector includes a connecting harness 302 connected to the temperature sensing unit 301, and a connector 303 located at the end of the connecting harness 302 away from the temperature sensing unit 301. The connecting harness 302 is covered with an insulating layer. Meanwhile, the temperature sensing unit 301 is a temperature sensor.

[0064] The cold plate 100 includes a heat exchange plate 101 and a flow channel plate 102 that are fastened together, and a flow channel 1000 formed between the heat exchange plate 101 and the flow channel plate 102. The heat exchange plate 101 is provided with a through hole 1011 that communicates with the flow channel 1000, and the contact portion 202 extends into the through hole 1011.

[0065] The contact portion 202 has a semi-circular cross-section and is adapted to the through hole 1011; and the temperature sensing base 200 is welded to the heat exchange plate 101.

[0066] This includes a frame 400 disposed on the cold plate 100, and the cold plate 100 and the frame 400 together form a battery cavity for mounting the battery cell module; and the battery pack explosion-proof valve 700 is disposed on the frame 400, the temperature sensing component 300 is located inside the frame 400, the liquid inlet / outlet component 103 of the cold plate 100 is located outside the frame 400, and the temperature sensing component 300 and the battery pack explosion-proof valve 700 are correspondingly disposed along the length direction of the battery pack.

[0067] It also includes a bottom protective plate 500 connected to the frame 400 and a battery pack cover 600. The bottom protective plate 500 is located below the cold plate 100, and the battery pack cover 600 is used to cover the battery cavity. At the same time, a sealing strip 800 is provided between the battery pack cover 600 and the frame 400, and a sealing strip 800 is provided between the bottom protective plate 500 and the cold plate 100.

[0068] In the preferred embodiment of the battery pack described above, the specific configuration and arrangement of the cold plate 100, temperature sensing base 200, temperature sensing component 300, frame 400, bottom protective plate 500, battery pack top cover 600, battery pack explosion-proof valve 700, sealing strip 800, and cell assembly 900 can still be referred to the descriptions in the above exemplary embodiments. Furthermore, in this preferred embodiment, the beneficial effects brought about by the design of the cold plate 100, temperature sensing base 200, temperature sensing component 300, frame 400, bottom protective plate 500, battery pack top cover 600, battery pack explosion-proof valve 700, sealing strip 800, and cell assembly 900 can also be referred to the descriptions in the above exemplary embodiments.

[0069] The battery pack in this embodiment, with the above design, can detect the temperature of the coolant at the inlet of the cold plate 100, thereby improving the overall temperature control effect of the pack and reducing the risk of thermal runaway. It can also provide the exhaust temperature at the battery pack explosion-proof valve 700. At the same time, it can prevent the problem of abnormal temperature acquisition and difficulty in reporting thermal runaway signals due to burning during thermal runaway, thus enabling rapid thermal runaway alarm and improving the safety of the battery pack.

[0070] An embodiment of the second aspect of this application provides an electrical device, which includes the battery pack described in the first aspect embodiment. This electrical device can be an energy storage device, or it can be a power device, such as an electric vehicle.

[0071] By incorporating the battery pack found in the first aspect embodiment, the electrical device of this embodiment can improve the overall safety of the device, thereby enhancing its performance.

[0072] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the protection scope of the claims of this application.

Claims

1. A battery pack, characterized in that: It includes a cold plate, a temperature sensing base disposed on the cold plate, and a temperature sensing component disposed in the cavity of the temperature sensing base; The bottom of the temperature-sensing base is provided with a contact part that extends into the cold plate, and the contact part is in contact with the coolant in the cold plate; The temperature sensing component is covered with an insulating layer, and the temperature sensing component is set to correspond to the liquid inlet of the cold plate, and / or the temperature sensing component is set to correspond to the explosion-proof valve of the battery pack.

2. The battery pack according to claim 1, characterized in that: The temperature sensing component includes a temperature sensing unit disposed on the temperature sensing base, and an electrical connector connected to the temperature sensing unit. The electrical connector is covered with the insulating layer and is used to connect to the control module.

3. The battery pack according to claim 2, characterized in that: The temperature-sensing base is provided with an opening that communicates with the cavity; A cover plate is provided between the electrical connector and the temperature sensing unit. The cover plate is detachably connected to the temperature sensing base and seals the opening.

4. The battery pack according to claim 3, characterized in that: The cover plate and the temperature-sensing base are connected by fasteners; and / or, A sealing element is provided between the cover plate and the temperature sensing base, and the sealing element is used to seal the opening.

5. The battery pack according to claim 2, characterized in that: The electrical connector includes a connecting wire harness connected to the temperature sensing unit, and a connector located at the end of the connecting wire harness away from the temperature sensing unit, the connecting wire harness being covered with the insulating layer; and / or, The temperature sensing unit is a temperature sensor.

6. The battery pack according to claim 1, characterized in that: The cold plate includes a heat exchange plate and a flow channel plate that are fastened together, and a flow channel formed between the heat exchange plate and the flow channel plate. The heat exchange plate is provided with a through hole that communicates with the flow channel, and the contact portion extends into the through hole.

7. The battery pack according to claim 6, characterized in that: The contact portion has a semi-circular or rectangular cross-section and is adapted to the through hole; and / or, The temperature sensing base is welded together with the heat exchange plate.

8. The battery pack according to any one of claims 1 to 7, characterized in that: It also includes a frame disposed on the cold plate, the cold plate and the frame forming a battery cavity for mounting the cell module; The battery pack explosion-proof valve is located on the frame, the temperature sensing component is located inside the frame, the liquid inlet / outlet component of the cold plate is located outside the frame and along the length of the battery pack, and the temperature sensing component is correspondingly arranged with the battery pack explosion-proof valve.

9. The battery pack according to claim 8, characterized in that: It also includes a bottom protective plate connected to the frame and a battery pack cover, the bottom protective plate being located below the cold plate and the battery pack cover being used to seal the battery cavity; A sealing strip is provided between the battery pack cover and the frame, and / or a sealing strip is provided between the bottom protective plate and the cold plate.

10. An electrical device, characterized in that: The electrical device is provided with a battery pack as described in any one of claims 1 to 9.

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