Cover plate assembly, battery and electric device

Abstract

The application provides a cover plate assembly, a battery and an electric device. The cover plate assembly comprises a support frame, a fixing member and a temperature sensor. The support frame is provided with a first pole and a second pole at intervals. The fixing member is arranged on the support frame and has a mounting groove and a via hole in communication with the mounting groove. The temperature sensor is arranged in the mounting groove and comprises a first pin and a second pin. The first pin is arranged to pass through the corresponding via hole and is electrically connected to the first pole. The second pin is arranged to pass through the corresponding via hole and is electrically connected to the second pole. The application can improve the measurement accuracy of the temperature sensor and better reflect the internal parameters of the battery.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a cover plate assembly, a battery, and an electrical device. Background Technology

[0002] In the field of power batteries, battery safety is a crucial research topic. Under charging, discharging, overcharging, over-discharging, short circuits, or other extreme conditions, battery cells may experience a rapid increase in internal temperature and pressure, even leading to thermal runaway, which can result in serious safety accidents such as fires and explosions. Therefore, it is necessary to monitor the changes in the internal parameters of the battery cell (such as temperature or pressure).

[0003] In related technologies, temperature sensors are typically attached to the outer surface of the battery to indirectly infer its internal state based on external temperature. However, this method has low measurement accuracy and cannot accurately reflect the battery's internal parameters. Utility Model Content

[0004] In view of the above problems, embodiments of this application provide a cover plate assembly, a battery, and an electrical device, which can improve the measurement accuracy of the temperature sensor and better reflect the internal parameters of the battery.

[0005] To achieve the above objectives, the embodiments of this application provide the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a cover plate assembly, which includes:

[0007] A support frame, wherein a first pole post and a second pole post are spaced apart on the support frame;

[0008] A fastener is disposed on the support frame, and the fastener has a mounting groove and a through hole communicating with the mounting groove.

[0009] A temperature sensor is disposed in the mounting slot, and the temperature sensor includes a first pin and a second pin. The first pin passes through a corresponding through hole and is electrically connected to the first electrode post, and the second pin passes through a corresponding through hole and is electrically connected to the second electrode post.

[0010] In one possible implementation, the fastener includes a plurality of fasteners spaced apart along a circular trajectory, such that the plurality of fasteners enclose the mounting groove, and any adjacent fasteners enclose a through hole.

[0011] In one possible implementation, the substrate is provided with a riveting post, and the support frame is provided with a riveting hole. The riveting post and the riveting hole cooperate with each other and are fixedly connected by a riveting process, so that the substrate and the support frame are fixedly connected.

[0012] In one possible implementation, at least one of the first and second poles is provided with a receiving groove extending toward the support frame, the receiving groove being used to receive a corresponding pin.

[0013] In one possible implementation, the cover assembly further includes a pressure plate that covers the temperature sensor and is connected to the fastener.

[0014] In one possible implementation, the pressure plate includes a first pressure plate and two second pressure plates, the two second pressure plates being spaced apart on one side of the first pressure plate;

[0015] Each of the second pressure plates is bent at the end away from the first pressure plate to form a bent portion, the bent portion being parallel to the first pressure plate, and the bent portion being provided with a slot; the fixing buckle is engaged in the slot.

[0016] In one possible implementation, the cover plate assembly further includes a substrate mounted on the side of the support frame away from the fixing member, wherein both the first pole post and the second pole post pass through the substrate and protrude from the substrate.

[0017] In one possible implementation, the cover plate assembly further includes a first connector and a second connector, the first connector being disposed on and connected to the first pole post, and the second connector being disposed on and connected to the second pole post.

[0018] In one possible implementation, the cover plate assembly further includes a first insulating layer and a second insulating layer, the first insulating layer covering the first pin and the second insulating layer covering the second pin.

[0019] Secondly, embodiments of this application provide a battery including a housing, a battery cell, and a cover assembly as described in the first aspect, wherein the battery cell is disposed within the housing, and the cover assembly covers the housing.

[0020] Thirdly, embodiments of this application provide an electrical device, including an electrical device and the battery described in the third aspect, wherein the battery is electrically connected to the electrical device and is used to provide electrical energy to the electrical device.

[0021] This application provides a cover plate assembly, a battery, and an electrical device in which a fixing member with a mounting groove is provided on the support frame of the cover plate assembly, allowing a temperature sensor to be directly mounted on the support frame. This encapsulates the temperature sensor inside the battery, enabling it to contact the internal environment of the cell more directly. This effectively reduces measurement errors caused by heat transfer hysteresis and non-uniformity, significantly improving the accuracy of temperature measurement and providing a reliable basis for accurately understanding the internal temperature of the cell.

[0022] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the cover plate assembly, battery, and electrical equipment provided by the embodiments of this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific implementation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 An exploded view of the cover plate assembly provided in an embodiment of this application;

[0025] Figure 2 A perspective view of the cover plate assembly provided in an embodiment of this application;

[0026] Figure 3 This is a partial structural schematic diagram of the cover plate assembly provided in an embodiment of this application;

[0027] Figure 4 A perspective view of the support frame provided in an embodiment of this application;

[0028] Figure 5 A perspective view of the support frame provided in an embodiment of this application;

[0029] Figure 6 for Figure 5 Enlarged view of region A in the middle;

[0030] Figure 7 A schematic diagram of the pressure plate provided in the embodiments of this application;

[0031] Figure 8 A schematic diagram of the pole provided in an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100: Support frame; 110: First pole post; 120: Second pole post; 130: Mounting hole; 140: Receiving groove; 150: Riveting hole; 160: Explosion-proof valve;

[0034] 200: Fastener; 210: Mounting slot; 220: Through hole; 230: Fixing clip; 231: Connecting base; 232: Clip body;

[0035] 300: Substrate; 310: Riveting post;

[0036] 400: Temperature sensor; 410: First pin; 420: Second pin;

[0037] 500: Pressure plate; 510: First pressure plate; 520: Second pressure plate; 530: Bending section; 531: Slot;

[0038] 600: First connector;

[0039] 700: Second connector;

[0040] 800: First insulating layer;

[0041] 900: Second insulating layer. Detailed Implementation

[0042] As described in the background section, temperature sensors are typically attached to the outer surface of battery cells to indirectly infer the internal state of the cell from the external temperature. However, due to the hysteresis and unevenness of heat transfer within the battery cell, the measurements from the external temperature sensors cannot accurately reflect the true condition of the core area, resulting in low measurement accuracy and an inability to better reflect the internal parameters of the battery cell.

[0043] To address the aforementioned technical problems, this application provides a cover plate assembly, a battery, and an electrical device. By providing a fixing member with a mounting groove on the support frame of the cover plate assembly, a temperature sensor can be directly mounted on the support frame. This encapsulates the temperature sensor inside the battery, allowing it to directly contact the internal environment of the cell. This effectively reduces measurement errors caused by heat transfer hysteresis and non-uniformity, significantly improving the accuracy of temperature measurement and providing a reliable basis for accurately understanding the internal temperature of the cell.

[0044] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, 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.

[0045] This application provides a cover plate assembly for sealing the battery casing and realizing the electrical connection between the battery cell and the external circuit.

[0046] Please refer to the following: Figure 1 , Figure 4 and Figure 5 The cover plate assembly includes a support frame 100, on which a first pole post 110 and a second pole post 120 are provided. That is, the first pole post 110 and the second pole post 120 are spaced apart on the support frame 100.

[0047] One of the first terminal 110 and the second terminal 120 is the positive terminal, and the other is the negative terminal. The first terminal 110 and the second terminal 120 are used to electrically connect with the tabs of the battery cell to facilitate the electrical connection between the battery cell and an external circuit.

[0048] It should be noted that the first pole post 110 and the second pole post 120 can be fixedly connected to the support frame 100 by welding, or other connection methods may be used. The following description will take the connection method between the first pole post 110 and the support frame 100 as an example.

[0049] Please refer to Figure 1 , Figure 4 and Figure 5 The support frame 100 has a mounting hole 130 that extends through the support frame 100 along its thickness direction. A first electrode post 110 passes through the mounting hole 130 and is welded to the support frame 100. It should be noted that the diameter of the first electrode post 110 can be uniform or varied. For example, the first electrode post 110 includes a first portion and a second portion connected to each other, the diameter of the first portion being larger than the diameter of the second portion, and the first portion facing the battery cell.

[0050] The cover plate assembly also includes a fastener 200, which is disposed on the support frame 100. Alternatively, along the thickness direction of the support frame 100, the support frame 100 has a first surface and a second surface disposed opposite to each other. The first surface is the surface of the support frame 100 facing the battery cell, and the second surface is the surface of the support frame 100 facing away from the battery cell. The fastener 200 can be fixedly connected to the first surface of the support frame 100 by welding or other fixing methods.

[0051] Please refer to Figure 5 and Figure 6 The fastener 200 has a mounting groove 210 and a through hole 220 communicating with the mounting groove 210. The bottom of the mounting groove 210 can be a portion of the first surface, or the bottom of the mounting groove 210 can be located within the fastener 200.

[0052] Please continue to refer to this. Figure 1 and Figure 3 The cover assembly also includes a temperature sensor 400, which is disposed within the mounting groove 210. For example, the temperature sensor 400 is snapped into the mounting groove 210 to achieve a fixed connection between the temperature sensor 400 and the support frame 100.

[0053] The temperature sensor 400 includes a first pin 410 and a second pin 420. The first pin 410 passes through a corresponding through-hole 220 and is electrically connected to the first terminal 110, and the second pin 420 passes through a corresponding through-hole 220 and is electrically connected to the second terminal 120. This allows the temperature sensor 400 to draw power directly from the battery, simplifying the electrical connection between the temperature sensor 400 and the battery. Furthermore, the first pin 410 and the second pin 420 have identical structures. For example, both the first pin 410 and the second pin 420 include a first segment and a second segment connected to each other. The first segment extends along the length direction of the substrate 300, and the second segment extends along the width direction of the substrate 300, so that both the first pin 410 and the second pin 420 form an L-shape.

[0054] In this embodiment, the temperature sensor 400 is encapsulated inside the battery. The temperature sensor 400 can come into more direct contact with the internal environment of the battery cell, effectively reducing measurement errors caused by heat transfer hysteresis and non-uniformity, thereby significantly improving the accuracy of temperature measurement and providing a reliable basis for accurately grasping the internal temperature of the battery cell.

[0055] It should be noted that the fastener 200 can be a frame structure or other structures. For examples, please refer to [link / reference needed]. Figure 5 and Figure 6 The fixing member 200 includes multiple fixing buckles 230, which are spaced apart along a circular trajectory so that they surround a mounting groove 210, and any adjacent fixing buckles 230 surround a through hole 220. It should be noted that in this embodiment, the circular trajectory can match the shape of the temperature sensor 400. For example, the circular trajectory can be rectangular.

[0056] The number of fixing buckles 230 can be four or more. The following embodiment describes an example with four fixing buckles 230. Exemplarily, the four fixing buckles 230 are arranged at intervals along the circumference of the rectangle, such that one fixing buckle 230 is provided at each apex position.

[0057] This application embodiment achieves rapid installation of the temperature sensor 400 by using a design where multiple fixing clips 230 are spaced apart along a circular trajectory to form an installation groove 210. Taking four fixing clips 230 arranged at intervals along a rectangle as an example, during installation, the temperature sensor 400 only needs to be placed into the installation groove 210 formed by the fixing clips 230. The fixing clips 230 can limit and fix the sensor, eliminating the need for complex installation processes and tools, greatly simplifying the installation process, improving installation efficiency, and reducing installation costs and error rates.

[0058] In addition, four fixing buckles 230 are respectively set at each of the top corners of the rectangle. This evenly distributed design makes the fixing component 200 fix the temperature sensor 400 more evenly and firmly, ensuring that the temperature sensor 400 can work stably in various harsh environments, and improving the safety and reliability of the entire battery.

[0059] It should also be noted that the fixing buckle 230 may further include a connecting base 231 and a buckle body 232 disposed on the connecting base 231, wherein the orthographic projection of the buckle body 232 on the connecting base 231 is located on the connecting base 231. In other words, the orthographic projection area of ​​the buckle body 232 on the connecting base 231 is larger than the area of ​​the connecting base 231. This arrangement can increase the contact area between the fixing buckle 230 and the support frame 100, thereby improving the connection strength between the fixing buckle 230 and the support frame 100.

[0060] In some embodiments, the electrode post is further improved to facilitate soldering the pin to the post. For example, please refer to... Figure 8 At least one of the first terminal 110 and the second terminal 120 is provided with a receiving groove 140, which extends in the direction toward the support frame; the receiving groove 140 is used to receive corresponding pins. That is, the receiving groove 140 can be provided on one of the first terminal 110 and the second terminal 120, or it can be provided on both the first terminal 110 and the second terminal 120. The following embodiments are described with the receiving groove 140 being provided on both the first terminal 110 and the second terminal 120 as an example.

[0061] The end of the first pin 410 facing away from the temperature sensor 400 is disposed in the receiving groove 140 of the first electrode 110 and is soldered to the first electrode 110. The end of the second pin 420 facing away from the temperature sensor 400 is disposed in the receiving groove 140 of the second electrode 120 and is soldered to the second electrode 120. This arrangement ensures that the top surfaces of the first pin 410 and the second pin 420 are as flush as possible with the top surfaces of their corresponding electrodes, preventing the first pin 410 and the second pin 420 from protruding from their corresponding electrodes. This increases the contact area and connection depth between the pins and electrodes, significantly improving the connection strength between them. Furthermore, it prevents accidental collisions or scratches between the pins and other components, reducing safety hazards such as short circuits and leakage caused by pin damage.

[0062] It should be noted that the receiving groove 140 is disposed on the top surface of the first pole post 110, and one side of the receiving groove 140 penetrates the outer peripheral surface of the first pole post 110, so that the receiving groove 140 exposes part of the top surface and part of the side surface of the first pole post 110.

[0063] In some embodiments, please refer to Figure 1 The cover assembly also includes a pressure plate 500, which covers the temperature sensor 400 and is connected to the fixing member 200. In this way, the pressure plate 500 directly covers the temperature sensor 400 and protects it. For example, by using the pressure plate 500 to withstand external forces, the temperature sensor 400 is prevented from being directly damaged by impact, thereby extending its service life and ensuring the stability and reliability of its measurement function.

[0064] Please refer to Figure 7 In some embodiments, the pressure plate 500 includes a first pressure plate 510 and two second pressure plates 520, which are spaced apart on one side of the first pressure plate 510. Alternatively, the two second pressure plates 520 are spaced apart on the side of the first pressure plate 510 facing the support frame 100, so that the first pressure plate 510 and the two second pressure plates 520 are connected together to form an inverted U-shaped structure. This inverted U-shaped structure cleverly avoids certain components, allowing the pressure plate 500 to be smoothly installed in the designated position, effectively protecting the temperature sensor 400 without interfering with the normal operation of other components inside the battery.

[0065] The first pressure plate 510 and the two second pressure plates 520 can be separate structures connected by welding, or they can be a single piece. For example, the pressure plate 500 can be formed by injection molding to improve its structural strength.

[0066] Each second pressure plate 520 is bent at the end away from the first pressure plate 510 to form a bent portion 530. The bent portion 530 is parallel to the first pressure plate 510. The bent portion 530 is provided with a slot 531. The fixing buckle 230 is engaged in the slot 531.

[0067] In this embodiment, the fixed buckle 230 is engaged with the slot 531, which makes the installation process of the pressure plate 500 simple and quick. The installation can be completed simply by aligning the fixed buckle 230 with the slot 531 and snapping it in, without the need for complicated tools and operating steps, which greatly improves the installation efficiency.

[0068] In some embodiments, please refer to Figure 1 and Figure 2 The cover plate assembly also includes a substrate 300, which is mounted on the side of the support frame 100 away from the fixing member 200, that is, the substrate 300 is disposed on one side of the second surface of the support frame 100.

[0069] The substrate 300 and the support frame 100 can be fixed by welding or other methods. For example, the substrate 300 is provided with riveting posts 310, and the support frame 100 is provided with riveting holes 150. The riveting posts 310 and riveting holes 150 are engaged and fixedly connected by a riveting process, thus fixing the substrate 300 and the support frame 100 together. The connection structure formed by the riveting process has good mechanical properties, ensuring that the substrate 300 and the support frame 100 maintain a stable connection under various complex working environments, preventing loosening or detachment, and improving the stability and reliability of the entire cover assembly.

[0070] Furthermore, the first electrode post 110 and the second electrode post 120 pass through the substrate 300 and protrude from the substrate 300. That is, the substrate 300 is provided with two through holes, which penetrate the support frame 100 along the thickness direction of the substrate 300. The first electrode post 110 and the second electrode post 120 pass through corresponding through holes and protrude from the substrate 300 to facilitate electrical connection between the first electrode post 110 and the second electrode post 120 and other components.

[0071] In some embodiments, the cover plate assembly further includes a first connector 600 and a second connector 700, the first connector 600 being disposed on and connected to the first pole post 110, and the second connector 700 being disposed on and connected to the second pole post 120.

[0072] In this way, the first connector 600 and the second connector 700 can be used to achieve electrical connection between the pole and the tab of the battery cell, which facilitates the electrical connection between the pole and the tab.

[0073] In some embodiments, the cover assembly further includes a first insulating layer 800 and a second insulating layer 900, the first insulating layer 800 covering the first pin 410 and the second insulating layer 900 covering the second pin 420. The first insulating layer 800 and the second insulating layer 900 can be high-temperature insulating tape. This high-temperature insulating tape possesses excellent insulation properties, maintaining stable insulation performance even in high-temperature environments. It prevents the pins from being isolated from exposed tabs or conductive structures of the battery cell, thereby significantly reducing the possibility of short circuits caused by accidental contact between the pins and conductive structures, ensuring the safety performance of the cover assembly and the entire battery.

[0074] It should be noted that the cover plate assembly also includes an explosion-proof valve 160, which is disposed on the support frame 100 and exposed in the explosion-proof hole of the substrate 300.

[0075] This application also provides a battery, which may include a casing, a battery cell, and a cover assembly as described in any of the above embodiments. The battery cell is disposed inside the casing, and the cover assembly covers the casing and seals it. The battery cell may be a laminated structure or a wound core structure.

[0076] Since the battery provided in this application includes the cover assembly described in any embodiment, the battery has all the structure and beneficial effects of the cover assembly, and will not be described in detail in this application.

[0077] This application also provides an electrical device, including an electrical appliance and a battery as described in any of the above embodiments. The battery is electrically connected to the electrical appliance to provide electrical energy to it. Since the vehicle includes the battery described in any of the above embodiments, it possesses the structure and beneficial effects of a battery, and will not be described further in this embodiment.

[0078] The electrical equipment in this application embodiment can be a vehicle, for example, a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. Accordingly, the electrical device can be the vehicle's drive mechanism or the vehicle's control system.

[0079] In addition, electrical equipment can also serve as other energy storage devices, such as mobile phones, portable devices, laptops, electric toys, power tools, ships, and spacecraft. Among these, spacecraft can include airplanes, rockets, space shuttles, or spacecraft.

[0080] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0081] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such 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 cover plate assembly, characterized in that, include: A support frame, wherein a first pole post and a second pole post are spaced apart on the support frame; A fastener is disposed on the support frame, and the fastener has a mounting groove and a through hole communicating with the mounting groove; A temperature sensor is disposed in the mounting slot, and the temperature sensor includes a first pin and a second pin. The first pin passes through a corresponding through hole and is electrically connected to the first electrode post, and the second pin passes through a corresponding through hole and is electrically connected to the second electrode post.

2. The cover plate assembly according to claim 1, characterized in that, The fastener includes multiple fasteners, which are spaced apart along a circular trajectory so that they surround the mounting groove and any adjacent fasteners surround a through hole.

3. The cover plate assembly according to claim 1, characterized in that, At least one of the first pole post and the second pole post is provided with a receiving groove, the receiving groove extending toward the support frame, the receiving groove being used to receive the corresponding pin.

4. The cover plate assembly according to any one of claims 1-3, characterized in that, The cover plate assembly also includes a pressure plate, which covers the temperature sensor and is connected to the fixing member.

5. The cover plate assembly according to claim 4, characterized in that, The pressure plate includes a first pressure plate and two second pressure plates, the two second pressure plates being spaced apart on one side of the first pressure plate; Each of the second pressure plates is bent at the end away from the first pressure plate to form a bent portion, the bent portion being parallel to the first pressure plate, and the bent portion being provided with a slot; a fixing buckle is engaged in the slot.

6. The cover plate assembly according to any one of claims 1-3, characterized in that, The cover plate assembly further includes a base plate, which is mounted on the side of the support frame away from the fixing member, and both the first pole post and the second pole post pass through the base plate and protrude from the base plate.

7. The cover plate assembly according to any one of claims 1-3, characterized in that, The cover plate assembly further includes a first connector and a second connector. The first connector is disposed on the first pole post and connected to the first pole post, and the second connector is disposed on the second pole post and connected to the second pole post.

8. The cover plate assembly according to claim 7, characterized in that, The cover plate assembly further includes a first insulating layer and a second insulating layer, the first insulating layer covering the first pin and the second insulating layer covering the second pin.

9. A battery, characterized in that, It includes a housing, a battery cell, and a cover plate assembly as described in any one of claims 1-8, wherein the battery cell is disposed within the housing and the cover plate assembly covers the housing.

10. An electrical appliance, characterized in that, It includes an electrical device and the battery of claim 9, wherein the battery is electrically connected to the electrical device and is used to provide electrical energy to the electrical device.

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