Intelligent battery built-in sensing device, battery and vehicle

Abstract

The application provides a kind of intelligent electric core built-in sensing device, electric core and vehicle, wherein the intelligent electric core built-in sensing device is detachably connected with the electric core, and is used to detect the state of the electric core inside the electric core;And the intelligent electric core built-in sensing device includes sensor, sleeve and connector, wherein the sleeve covers the sensor, the connector is connected with the sleeve, and the sensor is electrically connected with the connector to transmit sensing signal through the connector.The application can protect the built-in sensor when it needs to be replaced due to failure or corrosion, etc.The process stability and integrity of the built-in sensor, as well as the effective site of placement are not shifted;The service life of intelligent electric core is improved.

Description

Technical Field

[0001] This application relates to the field of battery cell sensors, and more specifically, to a smart battery cell with built-in sensing device, a battery cell, and a vehicle. Background Technology

[0002] Currently, the technology for embedding sensors in smart battery cells mainly focuses on the following aspects:

[0003] 1. Temperature monitoring: Temperature sensors can help detect and prevent overheating, which is especially important for battery types that are prone to overheating, such as lithium-ion batteries.

[0004] 2. Pressure Monitoring: Battery swelling is an indicator of overheating and overcharging. The built-in pressure sensor can detect and record battery swelling.

[0005] 3. Voltage and current monitoring: Monitoring these parameters is crucial for estimating the battery's remaining charge and health status.

[0006] 4. Internal resistance measurement: Changes in internal resistance can indicate battery aging or damage.

[0007] However, despite the enormous potential of smart cell built-in sensor technology, reliability issues still exist in practical applications: the harsh battery environment (high temperature, high pressure, chemical reactions) makes sensors and circuits susceptible to corrosion, side reactions, and accelerated battery degradation, and the built-in sensors need to operate stably in such an environment for a long time. Summary of the Invention

[0008] The purpose of this application is to provide a smart battery cell with built-in sensing device, battery cell, and vehicle, which protects the built-in sensor from being replaced due to failure or corrosion, ensuring the stability of the process, the integrity of the built-in sensor, and that the effective placement position is not offset, thereby improving the service life of the smart battery cell.

[0009] In a first aspect, the present invention provides a smart battery cell built-in sensing device, wherein the smart battery cell built-in sensing device is detachably connected to the battery cell and is used to detect the state of the battery cell inside the battery cell;

[0010] Furthermore, the smart battery cell has a built-in sensing device including a sensor, a sleeve, and a connector, wherein the sleeve covers the sensor, the connector is connected to the sleeve, and the sensor is electrically connected to the connector to transmit sensing signals through the connector.

[0011] The built-in sensing device in this application protects the stability and integrity of the built-in sensor when it needs to be replaced due to malfunction or corrosion, thereby improving the lifespan of the smart battery cell. Specifically, during sensor replacement, a sleeve provides a track and fixed position for the old sensor to be removed and the new sensor to be inserted, ensuring the stability and integrity of the built-in sensor replacement process and preventing displacement of the effective positioning points, thus extending the lifespan of the smart battery cell.

[0012] In an optional embodiment, the sleeve is a flexible sleeve, wherein the flexible sleeve is elastic to accommodate the normal expansion and contraction of the battery electrodes during use.

[0013] This optional embodiment makes the sleeve elastic to accommodate the normal expansion and contraction of the battery electrodes during use, minimizing potential damage to the positive and negative electrodes and separator materials of the battery, and ensuring sufficient mechanical strength for smooth insertion or removal of the built-in sensor.

[0014] In an optional embodiment, the flexible sleeve is made of an inert material, wherein the inert material includes one or a combination of polyimide, polyethylene oxide, polytetrafluoroethylene, polyvinylidene fluoride, perfluoroalkoxyethylene, polyvinyl chloride, polyetheretherketone, polydimethylsiloxane, polymethyl methacrylate, polylactic acid, polypropylene, polypropylene carbonate, polycaprolactone, nitrile rubber, polyethersulfone, and polyethers, or related modified materials.

[0015] This optional embodiment can use an inert material to make a flexible sleeve, wherein the inert material can resist the attack of strong oxidants or reducing agents, and has high electrochemical stability, good thermal stability and excellent mechanical properties.

[0016] In an optional embodiment, the wall thickness of the flexible sleeve is between 5 micrometers and 350 micrometers.

[0017] This optional embodiment can set the wall thickness of the flexible sleeve between 5 micrometers and 350 micrometers, thereby giving the flexible sleeve sufficient mechanical strength to withstand the impact of external forces, thus preventing damage to the sensor when the battery is subjected to physical impact.

[0018] In an optional embodiment, the flexible sleeve has a flexural strength greater than or equal to 6 MPa, and the flexible sleeve has a temperature tolerance between -55°C and 300°C.

[0019] This optional embodiment allows the flexible sleeve to adapt to pressure changes within the electrical circuit by setting its flexural strength to be greater than or equal to 6 MPa. Conversely, by setting the flexible sleeve's temperature tolerance between -55°C and 300°C, it allows the flexible sleeve to adapt to temperature changes and electrode expansion within the electrical circuit.

[0020] In an optional embodiment, the connector includes a connector base and a sealing gasket, wherein the connector base has a mounting groove, the concave shape of which is adapted to the shape of the sealing gasket so that the sealing gasket is tightly installed in the mounting groove;

[0021] Additionally, a slit is cut into the center of the sealing gasket. The slit serves as a reinforcement point for the sensor and is used to isolate the electrolyte and prevent it from leaking out.

[0022] In this optional embodiment, a sealing gasket can be installed via the mounting groove of the connector. Alternatively, a slit is cut into the center of the sealing gasket, which serves as a reinforcement point for the sensor and also isolates the electrolyte to prevent leakage.

[0023] In an optional embodiment, the connector further includes a cover plate, wherein the two ends of the cover plate are provided with second mounting screw holes, and the cover plate is connected to the connector seat through the second mounting screw holes.

[0024] In this optional embodiment, the mounting groove can be covered by a cover plate and connected to a connector via a second mounting screw hole, thereby enclosing the mounting groove and improving the sealing performance of the sealing gasket and sensor located in the mounting groove.

[0025] In a second aspect, the present invention provides a battery cell, the battery cell including a smart battery cell built-in sensing device as described in any of the foregoing embodiments.

[0026] The second aspect of this application describes a battery cell with replaceable sensors that can be isolated from the internal environment of the cell via a sleeve. The smart battery cell with its built-in sensing device protects the stability and integrity of the built-in sensor during replacement due to malfunction or corrosion, thus improving the lifespan of the smart battery cell. During sensor replacement, the sleeve provides a track and fixed position for the old sensor to be removed and the new sensor to be inserted, ensuring the stability and integrity of the built-in sensor replacement process and preventing displacement of the effective replacement site.

[0027] In an optional embodiment, the smart cell's built-in sensing device is installed on the large surface of the electrode between the outermost negative electrode and the separator of the cell.

[0028] This optional implementation involves installing the smart cell's built-in sensing device on the large surface of the electrode between the outermost negative electrode and the separator of the cell, and keeping it as far away from the corners as possible, while minimizing the footprint that could affect normal charging and discharging, thus avoiding increasing the battery's impedance and polarization.

[0029] Thirdly, the present invention provides a vehicle comprising a battery cell as described in any of the foregoing embodiments.

[0030] Since the vehicle of the third aspect of this application has the battery cell of the second aspect of this application, it has the technical effects brought about by the battery cell. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the structure of a smart battery cell with built-in sensing device disclosed in an embodiment of this application;

[0033] Figure 2 This is an assembly diagram of a smart battery cell with a built-in sensing device and a battery cell cover, as disclosed in an embodiment of this application.

[0034] Icons: 1-Cell housing; 2-Cell cover; 201-Mounting through hole; 3-Sleeve; 4-Sensor; 5-Connector; 501-First mounting screw hole; 6-Sealing gasket; 7-Cover plate; 701-Second mounting screw hole; 702-Connecting terminal. Detailed Implementation

[0035] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0036] Please see Figure 1 , Figure 1 This is a schematic diagram of a smart battery cell with built-in sensing device disclosed in an embodiment of this application. The smart battery cell with built-in sensing device is detachably connected to the battery cell and is used to detect the state of the battery cell from within. Figure 1 As shown, the battery cell housing 1 is connected to the battery cell cover 2, and the battery cell cover 2 is provided with a mounting through hole 201. The smart battery cell's built-in sensor can be inserted into the battery cell through this mounting through hole 201 to detect the internal state of the battery cell. The assembly of the smart battery cell's built-in sensor and the battery cell cover 2 is as follows: Figure 2 As shown, where, Figure 2 This is an assembly diagram of a smart battery cell with a built-in sensing device and a battery cell cover, as disclosed in an embodiment of this application.

[0037] like Figure 1 As shown, the smart battery cell built-in sensing device of this application embodiment includes a sensor 4, a sleeve 3 and a connector, wherein the sleeve 3 covers the sensor 4, the connector is connected to the sleeve 3, and the sensor 4 is electrically connected to the connector to transmit sensing signals through the connector.

[0038] The built-in sensing device of the smart battery cell in this embodiment can isolate the sensor 4 from the internal environment of the battery cell through the sleeve 3. This protects the built-in sensor 4 from the stability and integrity of the replacement process when it needs to be replaced due to failure or corrosion, thereby improving the service life of the smart battery cell. During the sensor 4 replacement process, the sleeve 3 provides a track and fixed position for the old sensor to be removed and the new sensor 4 to be inserted, ensuring the stability and integrity of the built-in sensor 4 replacement process and preventing the effective site from shifting. In this embodiment, as an optional implementation, the sleeve 3 is a flexible tube sleeve. The flexible tube sleeve is elastic to accommodate the normal expansion and contraction of the battery electrodes during use, minimizing potential damage to the positive and negative electrodes and separator materials of the battery. This optional implementation makes the sleeve 3 elastic to accommodate the normal expansion and contraction of the battery electrodes during use, minimizing potential damage to the positive and negative electrodes and separator materials of the battery, and its mechanical strength can ensure the smooth insertion or removal of the built-in sensor 4.

[0039] In this embodiment, as an optional implementation, the flexible sleeve is made of an inert material, wherein the inert material includes one or a combination of polyimide, polyethylene oxide, polytetrafluoroethylene, polyvinylidene fluoride, perfluoroalkoxyethylene, polyvinyl chloride, polyetheretherketone, polydimethylsiloxane, polymethyl methacrylate, polylactic acid, polypropylene, polypropylene carbonate, polycaprolactone, nitrile rubber, polyethersulfone, and polyethers, or related modified materials. This optional embodiment can use an inert material to make the flexible sleeve, wherein the inert material can resist attack from strong oxidizing or reducing agents, and has high electrochemical stability, good thermal stability, and excellent mechanical properties.

[0040] In this embodiment, as an optional implementation, the wall thickness of the flexible sleeve is between 5 micrometers and 350 micrometers. This optional implementation sets the wall thickness of the flexible sleeve between 5 micrometers and 350 micrometers, thereby giving the flexible sleeve sufficient mechanical strength to withstand the impact of external forces, thus preventing damage to the sensor 4 when the battery suffers physical impact.

[0041] In this embodiment, as an optional implementation, the flexible sleeve has a flexural strength greater than or equal to 6 MPa and a temperature tolerance between -55°C and 300°C. This optional implementation, by setting the flexural strength of the flexible sleeve to greater than or equal to 6 MPa, allows the flexible sleeve to adapt to pressure changes within the electrical circuit. On the other hand, by setting the temperature tolerance of the flexible sleeve between -55°C and 300°C, the flexible sleeve can adapt to temperature changes and electrode expansion within the electrical circuit.

[0042] In this embodiment of the application, as an optional implementation, the connector includes a connector base 5 and a sealing gasket 6. The connector base 5 has a mounting groove, the concave shape of which is adapted to the shape of the sealing gasket 6 so that the sealing gasket 6 is tightly installed in the mounting groove. A slit is cut out in the center of the sealing gasket 6. The slit serves as a reinforcement point for the sensor 4 and also acts as an electrolyte isolation point to prevent electrolyte leakage.

[0043] In this optional embodiment, the sealing gasket 6 can be installed via the mounting groove of the connector 5. Alternatively, a slit is cut into the center of the sealing gasket 6, which serves as a reinforcement point for the sensor 4 and also acts as an electrolyte barrier to prevent leakage.

[0044] In this embodiment, as an optional implementation, the connector further includes a cover plate 7, wherein the cover plate 7 has second mounting screw holes 701 at both ends. The cover plate 7 can be connected to the connector 5 by screwing the second mounting screw holes 701 into the first mounting screw holes 501. This optional implementation allows the cover plate 7 to cover the mounting groove and connect to the connector 5 via the second mounting screw holes 701, thereby enclosing the mounting groove and improving the sealing performance of the sealing gasket 6 and the sensor 4 located in the mounting groove.

[0045] Furthermore, the cover plate 7 is provided with a connection terminal 702, wherein one end of the connection terminal 702 is electrically connected to the sensor 4, and the other end can be connected to an external wiring harness or chip.

[0046] In addition, this application also discloses a battery cell, which includes a smart battery cell with a built-in sensing device as described in any of the foregoing embodiments.

[0047] The smart battery cell built-in sensing device of this application embodiment can isolate the sensor 4 from the internal environment of the battery cell through the sleeve 3. This protects the stability and integrity of the built-in sensor 4 during replacement due to malfunction or corrosion, thereby improving the service life of the smart battery cell. During the sensor 4 replacement process, the sleeve 3 provides a track and fixed position for the old sensor to be removed and the new sensor 4 to be implanted, ensuring the stability and integrity of the built-in sensor 4 replacement process and preventing deviation from the effective site.

[0048] In an optional implementation, the smart cell has a built-in sensor installed on the large surface of the electrode between the outermost negative electrode and the separator.

[0049] This optional implementation involves installing the smart cell's built-in sensing device on the large surface of the electrode between the outermost negative electrode and the separator, and keeping it as far away from the corners as possible, thus minimizing the footprint and impacting normal charging and discharging, and avoiding increasing the battery's impedance and polarization.

[0050] Furthermore, this application provides a vehicle that includes battery cells as described in any of the foregoing embodiments.

[0051] Since the vehicle in this embodiment of the application has the battery cell of the second aspect of the application, it has the technical effects brought about by the battery cell.

[0052] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and there may be other division methods in actual implementation. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the coupling or direct coupling or communication connection shown or discussed may be through some communication interface; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0053] Furthermore, the units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0054] Furthermore, the functional modules in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0055] It should be noted that if the function is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0056] In this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying any such actual relationship or order between these entities or operations.

[0057] The above are merely embodiments of this application and are not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A smart battery cell with built-in sensing device, characterized in that, The smart battery cell has a built-in sensing device that is detachably connected to the battery cell and is used to detect the state of the battery cell inside the cell. Furthermore, the smart battery cell has a built-in sensing device including a sensor, a sleeve, and a connector, wherein the sleeve covers the sensor, the connector is connected to the sleeve, and the sensor is electrically connected to the connector to transmit sensing signals through the connector.

2. The smart cell built-in sensing device as described in claim 1, characterized in that, The sleeve is a flexible sleeve, wherein the flexible sleeve is elastic to accommodate the normal expansion and contraction of the battery electrode during use.

3. The smart cell built-in sensing device as described in claim 2, characterized in that, The flexible sleeve is made of an inert material, which includes one or a combination of polyimide, polyethylene oxide, polytetrafluoroethylene, polyvinylidene fluoride, perfluoroalkoxyethylene, polyvinyl chloride, polyetheretherketone, polydimethylsiloxane, polymethyl methacrylate, polylactic acid, polypropylene, polypropylene carbonate, polycaprolactone, nitrile rubber, polyethersulfone, and polyethers, or related modified materials.

4. The smart cell built-in sensing device as described in claim 2, characterized in that, The wall thickness of the flexible sleeve is between 5 micrometers and 350 micrometers.

5. The smart cell built-in sensing device as described in claim 4, characterized in that, The flexible sleeve has a flexural strength greater than or equal to 6 MPa and a temperature tolerance between -55℃ and 300℃.

6. The smart cell built-in sensing device as described in claim 1, characterized in that, The connector includes a connector base and a sealing gasket, wherein the connector base has a mounting groove, the concave shape of the mounting groove is adapted to the shape of the sealing gasket so that the sealing gasket is tightly installed in the mounting groove; Additionally, a slit is cut into the center of the sealing gasket, which serves as a reinforcement point for the sensor and to isolate the electrolyte, preventing leakage.

7. The smart cell built-in sensing device as described in claim 6, characterized in that, The connector also includes a cover plate, wherein the two ends of the cover plate are provided with second mounting screw holes, and the cover plate is connected to the connector seat through the second mounting screw holes.

8. A battery cell, characterized in that, The battery cell includes a built-in sensing device for a smart battery cell as described in any one of claims 1-7.

9. The battery cell as described in claim 8, characterized in that, The built-in sensing device of the smart battery cell is installed on the large surface of the electrode sheet between the outermost negative electrode and the separator of the battery cell.

10. A vehicle, characterized in that, The vehicle includes the battery cells as described in any one of claims 8-9.

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