Battery monitoring device and battery

Abstract

The utility model provides a battery monitoring device and a battery, the battery monitoring device comprises a pedestal, one side of the pedestal is fixedly installed with one side of a magnetic shielding structure layer; the shell is fixedly arranged on the other surface of the magnetic shielding structure layer; a first notch groove is formed in the face, fixedly installed on the magnetic shielding structure layer, of the base, and a gas sensor is arranged in the first notch groove. The other surface of the base is in contact with a battery tab and is provided with a second notch groove, a third notch groove and a fourth notch groove, the third notch groove is positioned between the second notch groove and the fourth notch groove, a first strain sensor is arranged in the second notch groove, a second strain sensor is arranged in the third notch groove, and a temperature sensor is arranged in the fourth notch groove. According to the utility model, the wiring space and cost of battery monitoring can be effectively reduced, and the precision and reliability of battery monitoring are improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery monitoring device and a battery. Background Technology

[0002] With the development of new energy technologies, battery safety has gradually become a major concern.

[0003] Energy storage batteries may experience thermal runaway under conditions such as abuse or short circuits, which can lead to serious consequences. Therefore, it is necessary to monitor various parameters of energy storage batteries in real time during operation to provide early warnings and reduce the harm caused by battery thermal runaway.

[0004] In related technologies, multiple different sensors are used to monitor key locations on the battery. However, since these sensors are independent, it increases wiring space and cost; moreover, these sensors are electrical signal sensors, which are susceptible to electromagnetic interference, affecting data accuracy. Utility Model Content

[0005] In view of the above problems, a battery monitoring device and battery are proposed to overcome or at least partially solve the above problems, comprising:

[0006] A battery monitoring device, the battery monitoring device comprising:

[0007] A base, one side of which is fixed to one side of the magnetic shielding structure layer;

[0008] The outer casing is fixedly mounted to the other side of the magnetic shielding structure layer.

[0009] The base has a first groove on one side where it is fixed to the magnetic shielding structure layer, and a gas sensor is installed in the first groove. The other side of the base is in contact with the battery tab and has a second, a third, and a fourth groove. The third groove is located between the second and fourth grooves. A first strain sensor is installed in the second groove, a second strain sensor is installed in the third groove, and a temperature sensor is installed in the fourth groove.

[0010] Optionally, a plastic film structure is further provided between the magnetic shielding structure layer and the outer shell.

[0011] Optionally, the magnetic shielding structure layer is provided with multiple ventilation holes.

[0012] Optionally, the outer casing is further provided with a window structure, the position of which is opposite to the first groove.

[0013] Optionally, the base further includes a fifth groove connected to the first groove and a sixth groove connected to the second groove; wherein optical fiber transmission lines are disposed in the fifth groove and the sixth groove.

[0014] Optionally, the temperature sensor is composed of a pre-stretched fiber Bragg grating encapsulated in a quartz capillary.

[0015] Optionally, the first strain sensor is a microelectromechanical system (MEMS) strain sensor.

[0016] Optionally, the second strain sensor is a fiber Bragg grating sensor.

[0017] Optionally, the gas sensor is a fiber optic hydrogen sensor.

[0018] Optionally, the base is further provided with a plurality of positioning holes penetrating the base.

[0019] Optionally, the magnetic shielding structure layer is provided with a plurality of mounting holes, which are engaged with the positioning holes.

[0020] A battery in which the battery tabs are fixedly fitted with a battery monitoring device as described above.

[0021] The present invention has the following advantages: By integrating a temperature sensor, a strain sensor, and a gas sensor into the first, second, third, and fourth grooves of the base, the present invention can simultaneously monitor multiple parameters of the battery tabs, effectively reducing wiring space and cost; moreover, the magnetic shielding structure layer can reduce electromagnetic interference and improve the accuracy of sensor data acquisition. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a battery monitoring device provided in one embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the base provided in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the magnetic shielding structure layer provided in one embodiment of the present invention;

[0026] Figure 4This is a schematic diagram of the outer shell of the magnetic shielding structure layer provided in one embodiment of the present invention.

[0027] Explanation of reference numerals in the attached drawings: base 1, positioning hole 104, first groove 109, second groove 107, third groove 105, fourth groove 106, fifth groove 110, sixth groove 108, magnetic shielding structure layer 2, vent hole 201, mounting hole 202, outer shell 3, window structure 301. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0029] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0030] It should be understood that the phrase "some embodiments" throughout the specification means that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of the present invention. Therefore, "some embodiments" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0031] Reference Figure 1 The diagram shows a structural schematic of a battery monitoring device according to an embodiment of the present invention, comprising:

[0032] Base 1, one side of which is fixed to one side of the magnetic shielding structure layer 2;

[0033] The outer shell 3 is installed and fixed to the other side of the magnetic shielding structure layer 2.

[0034] Among them, such as Figure 2As shown, the base 1 and the magnetic shielding structure layer 2 are fixedly mounted on one side with a first groove 109, and a gas sensor is disposed in the first groove 109; the other side of the base 1 is in contact with the battery tab and is provided with a second groove 107, a third groove 105 and a fourth groove 106, the third groove 105 is located between the second groove 107 and the fourth groove 106, a first strain sensor is disposed in the second groove 107, a second strain sensor is disposed in the third groove 105, and a temperature sensor is disposed in the fourth groove 106.

[0035] In practical applications, the base 1 can be composed of a polyimide film, serving as a flexible support platform that directly adheres to the surface of the battery tabs, with the area of ​​the base 1 matching that of the battery tabs. Polyimide material possesses properties such as high temperature resistance, corrosion resistance, high strength, and lightweight, enabling the base 1 to serve as the core support for battery monitoring devices mounted on the energy storage battery tabs. Furthermore, it exhibits high reliability in extreme environments, good thermal expansion matching with fiber optic sensors, and microfabrication adaptability.

[0036] The magnetic shielding structure layer 2 is used to shield electromagnetic interference. It can shield high-frequency and low-frequency electromagnetic interference during battery charging and discharging, prevent distortion of the gas sensor, the first strain sensor, the second strain sensor, and the temperature sensor, and can also serve as an intermediate layer for isolation and outer layer for mechanical protection, thereby improving data acquisition accuracy and the stability of the battery monitoring device.

[0037] In practical applications, the magnetic shielding structure layer 2 can be composed of permalloy foil and stainless steel woven mesh, with the permalloy foil and stainless steel mesh bonded together using conductive silver adhesive. The magnetic shielding structure layer 2 can be installed and fixed on a polyimide base 1 using processes such as thermoforming and laser welding. Combined with a protective layer and edge insulation treatment, it achieves efficient electromagnetic shielding (capable of shielding both high-frequency and low-frequency electromagnetic interference), corrosion resistance, and flexible compatibility.

[0038] The outer shell 3 can be made of flexible materials such as silicone, serving as a protective encapsulation layer to protect the battery monitoring device. Specifically, the outer shell 3 can provide mechanical protection (preventing scratches and vibration impacts), insulation protection (preventing direct contact between the magnetic shielding structure layer 2 and the battery tabs), and sealing protection (blocking external moisture and contaminants) for the battery monitoring device.

[0039] In practical applications, the outer shell 3 can be processed by processes such as scraping, molding, and stepped curing and then placed on the magnetic shielding structure layer 2. Combined with edge sealing and breathable design, it provides mechanical protection, environmental isolation and flexible compatibility for the battery monitoring device, ensuring long-term stable operation under extreme battery conditions.

[0040] The first groove 109, the second groove 107, the third groove 105, and the fourth groove 106 can be formed by laser etching. The first groove 109 and the second groove 107 can be rectangular grooves.

[0041] The third groove 105 and the fourth groove 106 can be arranged adjacent to each other. The second strain sensor set in the third groove 105 and the temperature sensor set in the fourth groove 106 can simultaneously measure the temperature and strain of the battery tabs, thereby achieving decoupling of temperature and strain monitoring.

[0042] The first strain sensor installed in the second groove 107 can further ensure the stability and reliability of strain monitoring.

[0043] A gas sensor installed in the first groove 109 is used to monitor relevant parameters of the gas released when the battery is working (such as hydrogen released during battery electrolysis) in order to confirm whether the battery is working properly.

[0044] In some embodiments of this utility model, a plastic film structure is further provided between the magnetic shielding structure layer and the outer shell.

[0045] In practical applications, the plastic film structure can be an ePTFE (Expanded Polytetrafluoroethylene) film. Adding an ePTFE film between the magnetic shielding structure layer and the outer shell allows air to escape, avoids coating bubbles, and prevents the silicone material of the outer shell from liquefying and seeping into the mesh of the magnetic shielding structure layer.

[0046] In some embodiments of this utility model, the magnetic shielding structure layer is provided with multiple ventilation holes.

[0047] like Figure 3 As shown, the magnetic shielding structure layer 2 is provided with multiple vent holes 201. Since the magnetic shielding structure layer 2 is installed and fixed above the gas sensor located in the first groove 109, the multiple vent holes 201 allow the gas released by the battery to pass through freely in order not to affect gas monitoring.

[0048] In practical applications, perforations can be made in the magnetic shielding structure layer 2 made of permalloy foil using methods such as ultraviolet lasers to form multiple ventilation holes 201.

[0049] In some embodiments of this utility model, the outer shell is further provided with a window structure, the position of which is opposite to the first groove.

[0050] like Figure 4As shown, the housing 3 is also provided with a window structure 301, which is positioned opposite to the first groove 109 (e.g., directly above) to ensure that the gas released by the battery can fully contact the gas sensor in the first groove 109 through the window structure 301.

[0051] In some examples, an ePTFE membrane is provided between the magnetic shielding structure layer and the outer shell. The ePTFE membrane can be exposed through the window structure 301 to form a "breathable island" that allows gas to pass through the ePTFE membrane, while the liquid silicone of the outer shell will not penetrate into the magnetic shielding structure layer or the base.

[0052] In some embodiments of this invention, the temperature sensor is composed of a pre-stretched fiber Bragg grating encapsulated in a quartz capillary.

[0053] In practical applications, an optical fiber can be embedded in the fourth groove 106, and a temperature sensor can be placed at the top of the fiber. This temperature sensor consists of a pre-stretched fiber Bragg grating (FBG) encapsulated within a quartz capillary tube with a low coefficient of thermal expansion. By encapsulating the FBG within the quartz capillary tube, the FBG responds only to temperature changes; and the pre-stretching ensures that the FBG is always under tension, preventing strain errors introduced by FBG relaxation when the temperature decreases.

[0054] In some embodiments of this utility model, the first strain sensor is a microelectromechanical system strain sensor.

[0055] Micro-Electro-Mechanical Systems (MEMS) strain sensors are miniature sensors manufactured based on semiconductor micromachining technology. In this embodiment, the MEMS strain sensor can measure the strain of the battery and has the characteristics of high sensitivity and miniaturization, further improving the reliability and stability of battery strain monitoring.

[0056] In some embodiments of this invention, the second strain sensor is a fiber Bragg grating sensor.

[0057] In practical applications, the second strain sensor can be a bare optical fiber fiber Bragg grating sensor, which is directly embedded in the third groove and attached to the base to monitor the strain parameters of the battery.

[0058] In some embodiments of this utility model, the base further includes a fifth groove connected to the first groove and a sixth groove connected to the second groove; wherein optical fiber transmission lines are disposed in the fifth groove and the sixth groove.

[0059] like Figure 2As shown, the base 1 also includes a fifth groove 110 connected to the first groove 109, and a sixth groove 108 connected to the second groove 107. Optical fiber transmission lines are disposed within the fifth groove 110 and the sixth groove 108. The optical fiber transmission line in the fifth groove 110 is used to transmit data collected by the gas sensor, and the optical fiber transmission line in the sixth groove 108 is used to transmit data collected by the first strain sensor.

[0060] In practical applications, the optical fiber transmission lines in the fifth groove 110 and the sixth groove 108, after being led out by the battery monitoring device, can be connected to the corresponding demodulator and acquisition card to collect data.

[0061] In some embodiments of this invention, the gas sensor is a fiber optic hydrogen sensor.

[0062] In practical applications, fiber optic hydrogen sensors can consist of an optical fiber embedded in a first groove and an FBG (fiber optic grating) at its end. In some examples, the FBG can be attached to a palladium-based composite material (such as palladium nanowires or graphene composite films). When hydrogen is generated by the battery, it is adsorbed by the palladium film, causing the film to deform and changing the FBG wavelength, thus enabling strain monitoring. To improve the stability of the fiber optic hydrogen sensor, a certain thickness of silicon nitride can be deposited on the surface of the palladium film to prevent electrolyte corrosion. The FBG can be a regular FBG, or the hydrogen-sensitive FBG can be etched onto a tilted fiber grating (TFBG), and the sensitivity of hydrogen detection can be enhanced by surface plasmon resonance (SPR).

[0063] In practical applications, an ePTFE film can also be locally applied to the palladium film area as a breathable and waterproof membrane, allowing hydrogen to pass through while blocking silicone penetration.

[0064] In some embodiments of this utility model, the base is further provided with a plurality of positioning holes penetrating the base.

[0065] like Figure 2 As shown, the base 1 is also provided with a plurality of positioning holes 104 penetrating the base 1. The positioning holes 104 can be used for positioning and fixing the battery monitoring device on the battery tabs, such as by laser welding.

[0066] In some embodiments of this utility model, the magnetic shielding structure layer is provided with a plurality of mounting holes, which are engaged with the positioning holes.

[0067] like Figure 3As shown, the magnetic shielding structure layer 2 is provided with multiple mounting holes 202, which are connected to the positioning holes 104 for mounting and fixing the magnetic shielding structure layer 2 to the base 1 and the battery tabs.

[0068] In some embodiments of this utility model, a battery is also provided, wherein the battery terminals are fixedly fitted with the battery monitoring device as described above.

[0069] The present invention has the following advantages: By integrating a temperature sensor, a strain sensor, and a gas sensor into the first, second, third, and fourth grooves of the base, the present invention can simultaneously monitor multiple parameters of the battery tabs, effectively reducing wiring space and cost; moreover, the magnetic shielding structure layer can reduce electromagnetic interference and improve the accuracy of sensor data acquisition.

[0070] In practical applications, the battery monitoring device provided by this invention, through its layered integrated structural design, can achieve multi-parameter measurement of single-cell temperature, strain, and hydrogen gas in energy storage batteries, and is particularly suitable for state sensing of the electrode tabs of lithium-ion batteries. This battery monitoring device features small size, simple structure, and resistance to electromagnetic interference. It also provides a highly integrated, interference-resistant, and corrosion-resistant multi-parameter fiber optic sensor to achieve simultaneous monitoring of electrode tab temperature, strain, and hydrogen gas in energy storage batteries, thereby improving the reliability of battery safety management.

[0071] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0072] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery monitoring device, characterized in that, The battery monitoring device includes: A base, one side of which is fixed to one side of the magnetic shielding structure layer; The outer casing is fixedly mounted to the other side of the magnetic shielding structure layer. The base has a first groove on one side where it is fixed to the magnetic shielding structure layer, and a gas sensor is installed in the first groove. The other side of the base is in contact with the battery tab and has a second, a third, and a fourth groove. The third groove is located between the second and fourth grooves. A first strain sensor is installed in the second groove, a second strain sensor is installed in the third groove, and a temperature sensor is installed in the fourth groove.

2. The battery monitoring device according to claim 1, characterized in that, A plastic film structure is also provided between the magnetic shielding structure layer and the outer shell.

3. The battery monitoring device according to claim 1, characterized in that, The magnetic shielding structure layer is provided with multiple ventilation holes.

4. The battery monitoring device according to claim 1, characterized in that, The outer casing is also provided with a window structure, the position of which is opposite to the first groove.

5. The battery monitoring device according to claim 1, characterized in that, The base also includes a fifth groove connected to the first groove and a sixth groove connected to the second groove; wherein optical fiber transmission lines are disposed in the fifth groove and the sixth groove.

6. The battery monitoring device according to claim 1, characterized in that, The temperature sensor is composed of a pre-stretched fiber Bragg grating encapsulated in a quartz capillary.

7. The battery monitoring device according to claim 1, characterized in that, The first strain sensor is a microelectromechanical system strain sensor.

8. The battery monitoring device according to claim 1, characterized in that, The second strain sensor is a fiber Bragg grating sensor.

9. The battery monitoring device according to claim 1, characterized in that, The gas sensor is a fiber optic hydrogen sensor.

10. The battery monitoring device according to claim 1, characterized in that, The base is also provided with multiple positioning holes that penetrate the base.

11. The battery monitoring device according to claim 10, characterized in that, The magnetic shielding structure layer is provided with multiple mounting holes, which are connected to the positioning holes.

12. A battery, characterized in that, The battery is fitted with a battery monitoring device as described in any one of claims 1-11.

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