Top cover assembly, battery and electric vehicle

Abstract

The utility model provides a top cover assembly, a battery and an electric vehicle, and the top cover assembly comprises a top cover sheet which is provided with a through hole; the temperature and pressure intensity monitoring assembly is arranged on the inner wall of the top cover plate, and all components are located in the battery cell so as to monitor the temperature and the pressure intensity of the battery cell; the insulating part is connected to the inner wall of the top cover plate and is provided with an avoiding hole for avoiding the temperature and pressure monitoring assembly; wherein the through hole is used for penetrating through a signal wire of the temperature and pressure intensity monitoring assembly so as to transmit temperature and pressure intensity data in the battery cell to the electric control system, and when the temperature in the battery cell is too high or the pressure intensity is too high, the electric control system gives an alarm so that an operator can take countermeasures conveniently, and therefore the phenomena of battery cell fire, explosion and the like are avoided.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and particularly to a top cover assembly, a battery, and an electric vehicle using the battery. Background Art

[0002] Batteries are widely used in various industries. They have the characteristics of high energy density, long cycle life, no memory effect, and environmental friendliness. However, during the operation of batteries, problems such as heating and swelling may occur. If not monitored in time, serious consequences such as the fire and explosion of battery cells may occur. Utility Model Content

[0003] In view of this, this application provides a top cover assembly that can monitor the pressure and temperature inside the battery cell in real time to improve the safety of the battery cell. In addition, this application also provides a battery with the above-mentioned top cover assembly, and an electric vehicle using this battery.

[0004] To achieve the above object, this application provides the following technical solutions:

[0005] A top cover assembly, comprising:

[0006] A top cover sheet, provided with a through hole;

[0007] A temperature and pressure monitoring assembly, arranged on the inner wall of the top cover sheet, and all components are located inside the battery cell to monitor the temperature and pressure of the battery cell;

[0008] An insulating member, connected to the inner wall of the top cover sheet, and provided with an avoidance hole for avoiding the temperature and pressure monitoring assembly;

[0009] Wherein, the through hole is used for passing the signal wire of the temperature and pressure monitoring assembly.

[0010] Optionally, in the above top cover assembly, a groove is provided on the inner wall of the top cover sheet, the temperature and pressure monitoring assembly is arranged in the groove, and the through hole is provided at the bottom of the groove.

[0011] Optionally, in the above top cover assembly, the temperature and pressure monitoring assembly includes a substrate and a temperature sensor and a pressure sensor arranged on the substrate. The substrate can convert and transmit the signals collected by the temperature sensor and the pressure sensor. The substrate is arranged in the groove and can cover the through hole.

[0012] Optionally, in the above top cover assembly, the shape of the substrate matches the shape of the groove, and the substrate is welded in the groove.

[0013] Optionally, in the above top cover assembly, the temperature sensor and the pressure sensor arranged on the temperature and pressure monitoring assembly are hermetically connected to the substrate.

[0014] Optionally, in the above-mentioned top cover assembly, potting sealant is used between the signal line and the through hole to fix the signal line and seal the through hole.

[0015] Optionally, in the above-mentioned top cover assembly, the outer surface of the temperature and pressure monitoring component has corrosion resistance to resist the corrosion of the electrolyte.

[0016] Optionally, in the above-mentioned top cover assembly, one or more through holes are provided, which are located directly above the temperature and pressure monitoring component and allow the signal line to pass through.

[0017] A battery includes the top cover assembly described in any one of the above.

[0018] An electric vehicle includes the battery described above.

[0019] A top cover assembly provided in the present application includes a top cover sheet, a temperature and pressure monitoring component, and an insulating member. The temperature and pressure monitoring component is provided on the inner wall of the top cover sheet, and each part constituting the temperature and pressure monitoring component is located inside the battery cell, so as to directly monitor the temperature and pressure inside the battery cell. The insulating member is provided with an avoidance hole for avoiding the temperature and pressure monitoring component, so that the temperature and pressure monitoring component can extend into the area where the battery cell exists to monitor the temperature and pressure of the battery cell. Among them, a through hole is provided on the top cover sheet, and the through hole is used for the signal line on the temperature and pressure monitoring component to pass through, so as to monitor the temperature and pressure inside the battery cell and transmit the temperature and pressure data inside the battery cell to the electronic control system. When the temperature inside the battery cell is too high or the pressure is too high, the electronic control system issues an alarm, so that the operator can take corresponding measures to avoid phenomena such as the battery cell catching fire and exploding. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0021] Figure 1 It is a schematic structural diagram of the top cover assembly provided in the embodiment of the present application;

[0022] Figure 2 It is a schematic structural diagram of the inner wall of the top cover assembly;

[0023] Figure 3 It is the front view of the top cover assembly;

[0024] Figure 4 It is a schematic structural diagram of the insulating member;

[0025] Figure 5 Schematic structural diagram of the inner wall of the top cover sheet;

[0026] Figure 6 Schematic structural diagram of the top cover sheet;

[0027] Figure 7 Schematic structural diagram of the temperature and pressure monitoring component.

[0028] In Figures 1 - 7 :

[0029] 1. Top cover sheet; 11. Groove; 12. Through hole; 2. Temperature and pressure monitoring component; 21. Temperature sensor; 22. Pressure sensor; 23. Substrate; 24. Signal wire; 25. Second protruding part; 3. Insulating part; 31. Avoidance hole; 32. First protruding part. Specific embodiments

[0030] The present application provides a top cover assembly, which can monitor the pressure and temperature inside the battery cell in real time to improve the safety of the battery cell. In addition, the present application also provides a battery having the above-mentioned top cover assembly, and an electric vehicle using the battery.

[0031] Next, the technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0032] Such as Figures 1 - 7As shown in the figure, an embodiment of the present application provides a top cover assembly, including a top cover sheet 1, a temperature and pressure monitoring assembly 2, and an insulating member 3. The temperature and pressure monitoring assembly 2 is disposed on the inner wall of the top cover sheet 1, and each part constituting the temperature and pressure monitoring assembly 2 is located inside the battery cell. An avoidance hole 31 for avoiding the temperature and pressure monitoring assembly 2 is provided on the insulating member 3, so that the temperature and pressure monitoring assembly 2 can pass through the avoidance hole 31 and extend into the area where the battery cell exists to monitor the temperature and pressure of the battery cell. It should be noted that the shape of the avoidance hole 31 includes but is not limited to a runway shape, a circular shape, a square shape, etc. Among them, a through hole 12 is provided on the top cover sheet 1, and the through hole 12 is used for the signal line 24 on the temperature and pressure monitoring assembly 2 to pass through. The temperature and pressure monitoring assembly 2 is disposed on the inner wall of the top cover sheet 1, and each part constituting the temperature and pressure monitoring assembly 2 is located inside the battery cell, which means that the temperature and pressure monitoring assembly 2 can directly obtain the temperature and pressure inside the battery cell, not only making the temperature and pressure data inside the monitored battery cell more accurate, but also being able to detect abnormalities in the temperature and pressure data of the battery cell faster, so as to make a response faster. Compared with the prior art, the present application can also monitor the pressure inside the battery cell, further ensuring the normal operation of the battery cell to avoid phenomena such as fire and explosion of the battery cell, and improving the safety of the battery cell. At the same time, a through hole 12 allowing the signal line 24 of the temperature and pressure monitoring assembly 2 to pass through is provided on the top cover sheet 1, which means that the data monitored by the temperature and pressure monitoring assembly 2 is transmitted through the signal line 24, thereby ensuring that the transmission process is not affected by other factors, such as the influence of the battery cell housing. Moreover, both the temperature and pressure monitoring assembly 2 and the through hole 12 are located on the top cover sheet 1. Preferably, in the present application, the temperature and pressure monitoring assembly 2 is located directly below the through hole 12. By doing so, when the signal line 24 passes through the through hole 12, the structure of the wire harness through which the signal line 24 passes out is simplified, the interference between the wire harness and the battery cell is avoided, and the reliability of the temperature and pressure monitoring assembly 2 is improved. As can be seen from the above description, after the temperature and pressure monitoring assembly 2 obtains the temperature and pressure data inside the battery cell, it transmits the data to the signal line 24, and the signal line 24 then transmits the data to the electronic control system. When the temperature inside the battery cell is too high or the pressure is too large, the electronic control system issues an alarm so that the operator can take countermeasures to avoid phenomena such as fire and explosion of the battery cell. It should be noted that in the present application, the insulating member 3 is a lower plastic; the inner wall of the top cover sheet refers to the wall surface facing the side where the battery cell is located.

[0033] In addition, as Figure 3As shown in the figure, the insulating part 3 includes a facing surface facing the battery cell, and a first protruding part 32 protruding from the facing surface and facing the battery cell. The temperature and pressure monitoring component 2 includes a second protruding part 25 protruding from the facing surface and facing the battery cell. In the height direction of the insulating part 3, the height of the first protruding part 32 is greater than or equal to the height of the second protruding part 25. The height of the first protruding part 32 being greater than or equal to the height of the second protruding part 25 avoids interference between the temperature and pressure monitoring component 2 and the interior of the battery cell, enhances the practicability of the top cover assembly, and improves the assembly efficiency of the top cover assembly and the battery cell.

[0034] Furthermore, as Figure 2 , Figure 3 and Figure 5 shown, a groove 11 is provided on the inner wall of the top cover sheet 1. The temperature and pressure monitoring component 2 is arranged in the groove 11, and a through hole 12 is provided at the bottom of the groove 11. That is, the groove 11 is located on the inner wall of the top cover sheet 1, and the temperature and pressure monitoring component 2 is located in the groove 11, so that a part of the temperature and pressure monitoring component 2 is located in the groove 11. The setting of the groove 11 enables the temperature and pressure monitoring component 2 to have more height dimensions. That is to say, the top cover assembly can be adapted to temperature and pressure monitoring components 2 with more height dimensions, increasing the practicability of the top cover assembly. In addition, on the basis of the same height of the temperature and pressure monitoring component 2, the setting of the groove 11 enables the temperature and pressure monitoring component 2 to better avoid interference with the interior of the battery cell.

[0035] That is to say, the setting of the groove 11 reduces the height of the temperature and pressure monitoring component 2 protruding from the top cover sheet 1. The height of the part of the temperature and pressure monitoring component 2 protruding from the groove 11 is less than the height of the top cover assembly, so that the temperature and pressure monitoring component 2 is inside the top cover assembly, thereby avoiding interference between the temperature and pressure monitoring component 2 and the battery cell, enhancing the practicability of the top cover assembly, and improving the assembly efficiency of the top cover assembly and the battery cell.

[0036] At the same time, the through hole 12 is provided at the bottom of the groove 11, which is more convenient for the signal line 24 to pass through, simplifies the structure of the wire harness through which the signal line 24 passes out, and enhances the stability of the signal transmission of the wire harness. In addition, the groove 11 may not be provided on the inner wall of the top cover sheet 1. At this time, the temperature and pressure monitoring component 2 is directly arranged on the facing surface of the inner wall of the top cover sheet 1.

[0037] Even further, as Figure 2 , Figure 5 and Figure 7As shown in the figure, the temperature and pressure monitoring component 2 includes a substrate 23, a temperature sensor 21 and a pressure sensor 22 disposed on the substrate 23. The substrate 23 can convert and transmit the signals collected by the temperature sensor 21 and the pressure sensor 22. The substrate 23 is disposed in the groove 11 and can cover the through hole 12. The temperature sensor 21 and the pressure sensor 22 are disposed on the substrate 23, thereby transmitting the obtained temperature and pressure data inside the battery cell to the substrate 23. The substrate 23 then converts the above data and transmits it to the signal line 24 to realize real-time monitoring of the pressure and temperature inside the battery cell. The substrate 23 is disposed in the groove 11 and covers the position where the through hole 12 is located to seal the through hole 12 and prevent the leakage of the electrolyte, thereby improving the sealing performance of the top cover assembly. In addition, the temperature sensor 21 and the pressure sensor 22 may not be disposed on the substrate 23 but directly on the top cover sheet 1. In this way, the signal line 24 can directly collect the data obtained by the temperature sensor 21 and the pressure sensor 22. In addition, the temperature and pressure monitoring component 2 may also be an integrated temperature and pressure sensor.

[0038] Preferably, in the present application, as Figure 2 , Figure 5 and Figure 7 shown, the shape of the substrate 23 matches that of the groove 11, and the substrate 23 is welded in the groove 11. The substrate 23 is placed in the groove 11 and matches the shape of the groove 11. That is to say, after the substrate 23 is placed in the groove 11, the gap between the edge of the substrate 23 and the edge of the groove 11 is very small. Then, the substrate 23 is welded to the groove 11 by means of continuous full welding. At the same time, the above gap is also filled due to continuous full welding. By doing so, it is beneficial to the firmness of the welding and the sealing performance of the top cover assembly, so that the temperature and pressure monitoring component 2 can be stably connected to the top cover sheet 1. And as described above, the substrate 23 covers the position where the through hole 12 is located. By doing so, the sealing performance of the top cover assembly is enhanced and the stability of data transmission is improved.

[0039] In an alternative embodiment, the temperature sensor 21 and the pressure sensor 22 provided on the temperature and pressure monitoring component 2 are hermetically connected to the substrate 23. In the present application, the temperature sensor 21 and the pressure sensor 22 are completely sealed with the substrate 23 by means of gluing to prevent the leakage of the electrolyte, thereby improving the stability and reliability of the top cover assembly.

[0040] In an alternative embodiment, as Figure 1 and Figure 3As shown in the figure, potting seal is used between the signal line 24 and the through hole 12 to fix the signal line 24 and seal the through hole 12. The signal line 24 passes through the through hole 12 and is connected to the electronic control system to facilitate the monitoring of the temperature and pressure inside the battery cell. Since there is a gap between the signal line 24 and the through hole 12 after the signal line 24 passes through the through hole 12, in order to make the sealing performance of the top cover assembly better, potting seal is carried out in the gap to seal the through hole 12 above, and at the same time, the signal line 24 is fixed, improving the stability of the signal line 24 and the practicability of the top cover assembly.

[0041] In an alternative embodiment, the outer surface of the temperature and pressure monitoring component 2 has corrosion resistance to resist the corrosion of the electrolyte. In the battery cell, the temperature and pressure monitoring component 2 is in contact with the electrolyte, and the electrolyte has certain corrosiveness. In the prior art, the temperature and pressure monitoring component 2 has the possibility of being corroded by the electrolyte, resulting in the abnormal operation of the temperature and pressure monitoring component 2. In this application, the outer surface of the temperature and pressure monitoring component 2 has corrosion resistance, for example, the outer surface is made of aluminum or is coated with a corrosion-resistant coating such as a nano-coating, to ensure the normal operation of the temperature and pressure monitoring component 2, improving the reliability of the temperature and pressure monitoring component 2 and making the top cover assembly more reliable.

[0042] In an alternative embodiment, as Figure 1 and Figure 6 shown in the figure, one or more through holes 12 are provided and are located directly above the temperature and pressure monitoring component, and allow the signal line 24 to pass through. The through hole 12 is a hole for the signal line 24 to pass through, and the data obtained by the signal line 24 comes from the temperature sensor 21 and the pressure sensor 22. In order to accurately obtain the temperature and pressure inside the battery cell, multiple temperature and pressure monitoring components 2 need to be provided, which means that there are multiple monitoring points of the temperature and pressure monitoring components 2 inside the battery cell. In this way, the temperature and pressure data inside the battery cell are more accurate, improving the safety of the battery cell. Because of the addition of the temperature and pressure monitoring component 2, the number of corresponding signal lines 24 also increases. At this time, multiple signal lines 24 can be bundled into one and pass through the through hole 12. However, there may be but are not limited to the following situations. For example, the distance between different temperature and pressure monitoring components 2 is relatively far. At this time, bundling the signal lines 24 on different temperature and pressure monitoring components 2 is not conducive to the simplification of the signal line harness, and there is a possibility of interference between the harness and the battery cell. Therefore, multiple through holes 12 can be provided on the top cover sheet 1 to facilitate the passing of multiple signal lines 24, thereby improving the practicability of the top cover assembly. At the same time, the through hole 12 is provided directly above the temperature and pressure monitoring component, shortening the distance between the signal line 24 and the through hole 12, further simplifying the harness and avoiding interference between the top cover assembly and the battery cell. In addition, only one through hole 12 can be provided. At this time, different signal lines 24 can be bundled into one and pass through the through hole 12.

[0043] In addition, an embodiment of the present application further provides a battery, which includes the above-mentioned top cover assembly. For the beneficial effects brought by the battery due to the above-mentioned top cover assembly, please refer to the description of the top cover assembly above, and details will not be repeated here.

[0044] Based on the above battery, the present application further provides an electric vehicle, which includes the above battery. For the beneficial effects brought by the electric vehicle due to the above battery, please refer to the description of the battery above, and details will not be repeated here.

[0045] The basic principles of the present application have been described above in combination with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and easy understanding, rather than limitations. The above details do not limit the present application to necessarily adopt the above specific details to implement.

[0046] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The word "or" and "and" used here refer to the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used here refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0047] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0048] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be very apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0049] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth", and "sixth" used in the description of the embodiments of the present application are only for more clearly elaborating the technical solutions and cannot be used to limit the protection scope of the present application.

[0050] The foregoing description has been presented for purposes of illustration and description. Furthermore, this description is not intended to limit embodiments of the present application to the form disclosed herein. Although several example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A top cover assembly, characterized in that: include: A top cover sheet having a through hole; A temperature and pressure monitoring component is arranged on the inner wall of the top cover sheet, and each component is located inside the battery cell to monitor the temperature and pressure of the battery cell; an insulating member connected to the inner wall of the top cover sheet and provided with an avoidance hole for avoiding the temperature and pressure monitoring assembly; the insulating member includes a facing surface facing the battery cell, and a first protrusion protruding from the facing surface and arranged toward the battery cell, the temperature and pressure monitoring assembly includes a second protrusion protruding from the facing surface and arranged toward the battery cell, and in the height direction of the insulating member, the height of the first protrusion is greater than or equal to the height of the second protrusion; Among them, the through hole is used to pass the signal line of the temperature and pressure monitoring component; a groove is provided on the inner wall of the top cover sheet, the temperature and pressure monitoring component is arranged in the groove, and the through hole is provided at the bottom of the groove; the temperature and pressure monitoring component includes a substrate and a temperature sensor and a pressure sensor arranged on the substrate.

2. The top cover assembly according to claim 1, characterized in that: The substrate can convert and transmit the signals collected by the temperature sensor and the pressure sensor. The substrate is arranged in the groove and can cover the through hole.

3. The top cover assembly according to claim 2, characterized in that: The base plate matches the shape of the groove, and the base plate is welded in the groove.

4. The top cover assembly according to claim 2, characterized in that: The temperature sensor and the pressure sensor arranged on the temperature and pressure monitoring assembly are sealed and connected to the substrate.

5. The top cover assembly according to claim 1, characterized in that: Glue sealing is adopted between the signal line and the through hole to fix the signal line and seal the through hole.

6. The top cover assembly according to claim 1, characterized in that: The outer surface of the temperature and pressure monitoring component is corrosion-resistant to resist corrosion by the electrolyte.

7. The top cover assembly according to claim 1, characterized in that: One or more through holes are provided and are located directly above the temperature and pressure monitoring component, allowing the signal line to pass through.

8. A battery, characterized in that: A top cover assembly comprising any one of claims 1-7.

9. An electric vehicle, characterized in that: Comprising the battery as claimed in claim 8.

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