Battery health degree monitoring system and vehicle

Abstract

The invention discloses a battery health degree monitoring system and a vehicle. The battery health degree monitoring system comprises a battery, the battery comprises a shell and a battery body located in the shell, and a monitoring hole is formed in the shell; the monitoring unit comprises a first electrode plate in sealed connection with the monitoring hole, a second electrode plate arranged at an interval with the first electrode plate, and a capacitance monitor electrically connected with the first electrode plate and the second electrode plate; and the first electrode plate and the shell form a closed space for sealing the battery main body. According to the battery health degree monitoring system, the gas generation condition in the battery is obtained by detecting the capacitance value or the capacitance value variation or the capacitance value change rate between the first electrode plate and the second electrode plate in real time, so that trace gas is generated in the battery, the sensitivity is high, judgment can be made in the germination stage of decline of the health degree of the battery, and the safety of the battery is improved. A user is reminded to pay attention to the health degree of the battery.

Description

Technical Field

[0001] This invention relates to battery health management, and more particularly to a battery health monitoring system and vehicle. Background Technology

[0002] Batteries are currently widely used in various aspects of industrial production and daily life. With the popularization of new energy vehicles and the frequent reports of battery spontaneous combustion and explosion accidents, the safety of users' lives and property has been greatly threatened. The safety of new energy vehicle batteries has been pushed to the forefront and has gradually become one of the most concerning issues for users.

[0003] When a battery malfunctions or ages, the internal electrolyte decomposes, producing gas. As the amount of gas increases, it can cause the battery to bulge and deform, potentially leading to internal short circuits, fires, and explosions. Therefore, developing a monitoring system for battery health is necessary and urgent, especially one that can provide early warnings of early signs of declining battery health.

[0004] Currently, the most common method for battery safety monitoring is pressure monitoring. This solution requires an additional pressure sensing element to detect pressure changes around the battery. The problems with this method are: pressure changes can only be detected after the amount of gas generated inside the battery reaches a certain level, causing the battery casing to deform due to gas expansion. This results in relatively low sensitivity, delayed warning functions, and the configuration is also space-consuming and costly.

[0005] In view of this, it is necessary to improve the existing battery health monitoring system and vehicles to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to provide a battery health monitoring system and vehicle to improve the sensitivity of battery health monitoring and solve at least one of the above-mentioned technical problems.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0008] A battery health monitoring system includes a battery, which includes a housing and a battery body located within the housing. The housing has a monitoring hole. The battery health monitoring system further includes a monitoring unit, which includes a first electrode plate, a second electrode plate, and a capacitance monitor that are sealed and connected to the monitoring hole. The first electrode plate and the housing form a sealed space that seals the battery body, and the first electrode plate is an elastic sheet. The second electrode plate includes an inductor portion spaced apart from the first electrode plate and a fixing portion for fixing the inductor portion. Both the first electrode plate and the inductor portion are electrically connected to the capacitance monitor.

[0009] In one optional embodiment, the first electrode sheet includes a first sheet and a first conductive layer located on the surface of the first sheet.

[0010] In an optional embodiment, the first sheet is a fluorinated rubber, preferably selected from Viton or PFA; the conductive layer is selected from at least one or more combinations of a metal paste layer, a conductive non-metal paste layer, or a metal sheet; the metal paste layer is selected from at least one or more combinations of a silver paste layer, a copper paste layer, or an aluminum paste layer; the conductive non-metal paste layer is selected from at least one or more combinations of a carbon paste layer, a graphene layer, or a carbon nanotube layer; and the metal sheet is selected from at least one or more combinations of a copper sheet, a silver sheet, a silver-copper alloy sheet, or an aluminum-copper alloy sheet.

[0011] In one optional embodiment, the elastic modulus of the first electrode sheet is not higher than 3.0 MPa, and / or the thickness of the first electrode sheet is 1 mm to 3 mm.

[0012] In one optional embodiment, the area of ​​the first electrode sheet is larger than the area of ​​the monitoring hole, and the first electrode sheet is attached to the outside of the housing; or, the first electrode sheet is embedded in the monitoring hole; or, the monitoring hole of the housing is provided with a mounting part, and the first electrode sheet is fixed on the mounting part.

[0013] In one optional embodiment, the first electrode sheet and the second electrode sheet are integrally disposed, the area of ​​the first electrode sheet is larger than the area of ​​the monitoring hole, and the first electrode sheet is attached to the outside of the housing; or, the first electrode sheet is embedded in the monitoring hole; or, the monitoring hole of the housing is provided with a mounting part, and the first electrode sheet and / or the second electrode sheet is fixed on the mounting part.

[0014] In one optional embodiment, the first electrode and the second electrode are separately disposed, the area of ​​the first electrode is larger than the area of ​​the monitoring hole, and the first electrode is attached to the outside of the housing; or, the first electrode is embedded in the monitoring hole; or, the monitoring hole of the housing is provided with a mounting part, and the first electrode is fixed on the mounting part; the second electrode is connected to the housing by fasteners, or the second electrode is welded or pasted to the housing, or the second electrode is interference-fitted with the mounting hole of the housing, or the second electrode is detachably fixed to the housing by a fixing seat.

[0015] In one optional embodiment, the first electrode sheet includes a first sheet and a first conductive layer on the first sheet, the first conductive layer being located on the surface of the first sheet facing the inductor; the inductor includes a second sheet and a second conductive layer on the second sheet, the second conductive layer being located on the surface of the second sheet facing the first electrode sheet; the first conductive layer and the second conductive layer are made of the same material.

[0016] In one optional embodiment, the initial distance between the first electrode plate and the inductor is d1, and the maximum deformation of the first electrode plate is d2, where d2 is 50% to 80% of d1.

[0017] In an optional implementation, the battery health monitoring system further includes a resistance monitor electrically connected to the first electrode plate.

[0018] In one optional implementation, the battery health monitoring system further includes an early warning module, which is communicatively connected to the monitoring unit.

[0019] In one optional implementation, the battery health monitoring system further includes an early warning module and a control module, wherein the control module is communicatively connected to both the early warning module and the monitoring unit.

[0020] A vehicle including the aforementioned battery health monitoring system.

[0021] The beneficial effects of this invention are as follows: The battery health monitoring system of this invention obtains the gas generation situation inside the battery by real-time detection of the capacitance value, capacitance value change amount, or capacitance value change rate between the first electrode plate and the second electrode plate. When a small amount of gas is generated inside the battery, the first electrode plate can also undergo elastic deformation under the action of gas pressure. The increase in capacitance value caused by this deformation can be monitored in real time. It has high sensitivity and can make a judgment at the early stage of battery health decline (before bulging occurs), reminding users to pay attention to the battery health so as to detect potential battery safety hazards and replace the battery as early as possible, effectively preventing safety accidents and greatly improving the safety of new energy vehicles. Moreover, the monitoring system and the battery are integrated into one design, with a compact structure and low detection cost. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the battery health monitoring system according to one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0024] Figure 3 for Figure 2 A diagram illustrating a bulging battery.

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of the first electrode plate;

[0026] Figure 5 This is a schematic diagram of the first electrode sheet in another embodiment of the present invention;

[0027] Figure 6 for Figure 5 Top view;

[0028] Figure 7 This is a schematic diagram of the first electrode sheet in another embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the battery health monitoring system in another embodiment of the present invention;

[0030] Figure 9 for Figure 8 A magnified view of a section at point B in the middle;

[0031] Figure 10 This is a schematic diagram of the battery health monitoring system in another embodiment of the present invention;

[0032] Figure 11 This is a schematic diagram of the battery health monitoring system in another embodiment of the present invention;

[0033] Figure 12 This is a schematic diagram of the battery health monitoring system in another embodiment of the present invention;

[0034] Figure 13 for Figure 12 The exploded diagram.

[0035] Among them, 100-battery health monitoring system, 1-battery, 11-casing, 110-monitoring hole, 111-first limiting structure, 112-second limiting structure, 113-mounting part, 12-battery body, 2-monitoring unit, 21-first electrode sheet, 211-first sheet, 212-first conductive layer, 213-anti-corrosion layer, 22-second electrode sheet, 221-inductor part, 222-fixing part. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to specific embodiments.

[0037] This invention provides a battery health monitoring system, which aims to detect corresponding signals at the early stage of battery health decline, so as to identify potential battery safety hazards as early as possible and effectively prevent safety accidents.

[0038] Please refer to Figures 1 to 13 As shown, a battery health monitoring system 100 according to an embodiment of the present invention includes a battery 1 and a monitoring unit 2. The monitoring unit 2 is used to monitor the health of the battery 1 and to provide risk signals in a timely manner.

[0039] The battery 1 is a storage battery 1, including but not limited to lead-acid batteries, nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, etc.

[0040] Specifically, the battery 1 includes a casing 11 and a battery body 12 located within the casing 11. The casing 11 is made of a rigid material such as ABS plastic, PP plastic, or HDPE resin, and protects the internal battery body 12. The battery body 12 contains an electrolyte. When the battery 1 malfunctions or ages, the internal electrolyte decomposes to produce gas. As the amount of gas produced increases, the temperature and pressure inside the casing 11 increase, causing the battery to bulge and deform, which can lead to accidents such as internal short circuits, fires, and explosions. Other structural details of the battery 1 are referenced in related technologies and will not be elaborated here.

[0041] The housing 11 is provided with a monitoring hole 110 for mounting the monitoring unit 2. The monitoring hole 110 is located on the top wall or side wall of the housing 11. Considering that the gas generated in the sealed space of the housing 11 will first diffuse upward, the monitoring hole 110 is preferably located on the top wall, which can further improve the sensitivity of the battery health monitoring system 100.

[0042] The housing 11 is provided with multiple monitoring holes 110, and correspondingly multiple sets of monitoring units 2 are installed. The multiple sets of monitoring units 2 are distributed in different parts of the housing 11, and monitor in multiple areas, which is more accurate; and can prevent unnecessary risks caused by the failure or error of a certain detection unit 2.

[0043] The monitoring unit 2 includes a first electrode plate 21 and a second electrode plate 22 that are sealed and connected to the monitoring hole 110, and a capacitance monitor that is electrically connected to both the first electrode plate 21 and the second electrode plate 22.

[0044] The phrase "the first electrode plate 21 is sealed to the monitoring hole 110" can be understood as the first electrode plate 21 sealing the monitoring hole 110, the first electrode plate 21 and the housing 11 forming a sealed space, and the battery body 12 being located within the sealed space.

[0045] The inductor portion 221 of the first electrode plate 21 and the second electrode plate 22 constitutes a capacitor, and the first electrode plate 21 is an elastic sheet. The capacitance varies with the distance between the first electrode plate 21 and the inductor portion 221. When the battery 1 is working normally, the air pressure in the sealed space is basically constant, the first electrode plate 21 is not under pressure, the distance between the first electrode plate 21 and the inductor portion 221 remains at the initial distance d1, and the measured capacitance is within the threshold value. When the battery 1 initially malfunctions, gas is generated in the sealed space, and the air pressure in the sealed space gradually increases. The squeezing effect of this air pressure causes the first electrode plate 21 to deform towards the inductor portion 221, the distance between the first electrode plate 21 and the inductor portion 221 decreases, and the capacitance value between them increases accordingly. When the capacitance value, the increase in capacitance value, or the growth rate of capacitance value reaches the corresponding predetermined threshold, it indicates that the health of the battery 1 is low, and a safety inspection or replacement is required.

[0046] In an optional embodiment, the elastic modulus of the first electrode sheet 21 is not higher than 3.0 MPa to ensure sufficient elasticity so that when the pressure inside the battery 1 increases, the first electrode sheet 21 undergoes a sufficiently large elastic deformation in a timely manner, causing a change in capacitance between the first electrode sheet 21 and the second electrode sheet 22.

[0047] In an optional embodiment, the thickness of the first electrode sheet 21 is 1mm to 3mm. When the pressure inside the battery 1 increases, the first electrode sheet 21 undergoes a sufficiently large elastic deformation in a timely manner, causing a change in capacitance between the first electrode sheet 21 and the second electrode sheet 22.

[0048] In this invention, please refer to Figures 1 to 13 As shown, the first electrode sheet 21 includes a first sheet 211 and a first conductive layer 212 located on the surface of the first sheet 211. The first sheet 211 constitutes a substrate, and the first conductive layer 212, as an electrode, together with the inductor 221, constitutes the capacitor.

[0049] The first sheet 211 is preferably a fluorinated rubber, which is resistant to corrosion from the electrolyte in the battery body 12, improving the durability of the battery 1, and is elastic, capable of elastic deformation under pressure. Optionally, the sheet is Viton or PFA, which combines elasticity and corrosion resistance.

[0050] The first conductive layer 212 is selected from at least one or more combinations of a metal paste layer, a conductive non-metal paste layer, or a metal sheet. The metal paste layer is selected from at least one or more combinations of a silver paste layer, a copper paste layer, or an aluminum paste layer; the conductive non-metal paste layer is selected from at least one or more combinations of a carbon paste layer, a graphene layer, or a carbon nanotube layer; and the metal sheet is selected from at least one or more combinations of a copper sheet, a silver sheet, a silver-copper alloy sheet, or an aluminum-copper alloy sheet.

[0051] In one embodiment, please refer to Figure 2 , Figure 3 As shown, the first conductive layer 212 is located on the outer surface of the first sheet 211, which can prevent the electrolyte in the battery body 12 from corroding the first conductive layer 212 and ensure the accuracy of the monitoring system.

[0052] In another embodiment, please refer to Figure 7 The first conductive layer 212 is located on the inner surface of the first sheet 211, and the first electrode sheet 21 further includes an anti-corrosion layer 213 located inside the first conductive layer 212 to prevent the electrolyte from corroding the first conductive layer 212.

[0053] The elastic modulus of the anti-corrosion layer 213 is not lower than that of the first sheet 211, so as not to restrict the elastic deformation of the first sheet 211. The material of the anti-corrosion layer 213 may be the same as that of the first sheet 211.

[0054] The connection methods between the first electrode plate 21 and the housing 11 include, but are not limited to, the following.

[0055] In one implementation method, please refer to Figures 1 to 7 As shown, the area of ​​the first electrode sheet 21 is larger than the area of ​​the monitoring hole 110. The first electrode sheet 21 is attached to the outside of the housing 11. Specifically, it can be fixed by pressure bonding or adhesive bonding, which is a simple process. Of course, other existing bonding methods can also be used for fixing.

[0056] Based on this, please refer to Figure 4 The first conductive layer 222 covers the entire surface of the first sheet 211. Alternatively, please refer to... Figure 5 , Figure 6 As shown, the first conductive layer 222 is located in the middle region of the first sheet 211, and its edge is attached to the shell 11. It will not undergo elastic deformation, so the absence of the first conductive layer 222 does not affect the capacitance measurement.

[0057] In another embodiment, please refer to Figures 8-11 As shown, the first electrode plate 21 is embedded in the monitoring hole 110.

[0058] In one embodiment, please refer to Figures 8-10 As shown, the first electrode plate 21 is installed with an interference fit to the monitoring hole 110 to achieve a seal. Specifically, the shape and size of the first electrode plate 21 and the monitoring hole 110 are adapted to each other, and they are installed through the elastic interference fit of the first electrode plate 21 itself.

[0059] In an optional embodiment, the area of ​​the monitoring hole 110 first increases and then decreases from the outside to the inside, holding the first electrode piece 21 within the monitoring hole 110. Alternatively, the housing may further include a first limiting structure 111 located at the outer end of the monitoring hole 110 and a second limiting structure 112 located at its inner end, with the first electrode piece 21 held between the first limiting structure 111 and the second limiting structure 112 to prevent it from falling off and also to improve sealing.

[0060] In another embodiment, please refer to Figure 11 As shown, the first electrode 21 is screwed into the monitoring hole 110, which facilitates installation and provides good sealing. Specifically, the inner wall of the monitoring hole 110 is threaded, and the side edge of the first electrode 21 is correspondingly configured with a concave-convex shape to match the inner wall, ensuring a sealed connection between the first electrode 21 and the housing 11.

[0061] In another embodiment, please refer to Figure 12 and Figure 13 As shown, a mounting portion 113 is provided at the monitoring hole 110 of the housing 11. The first electrode plate 21 is fixed on the mounting portion 113, specifically by pressure bonding and / or adhesive bonding, which is a simple process. In this embodiment, the mounting portion 113 is stepped; in other embodiments, the mounting portion 113 may also be of other shapes.

[0062] The second electrode plate 22 includes a sheet-shaped inductor portion 221 and a fixing portion 222. The inductor portion 221 and the first electrode plate 21 form a capacitor, and both the first electrode plate 21 and the inductor portion 221 are electrically connected to the capacitance monitor 2.

[0063] The inductor 221 can be made of any conductive sheet material and can form a capacitor with the first electrode 21. In one embodiment, the inductor 221 is a metal sheet, a conductive non-metal sheet (such as carbon), or a sheet doped with both metal and conductive non-metal. The metal sheet is selected from, but is not limited to, stainless steel sheets, copper sheets, etc., and the conductive non-metal sheet is selected from, but is not limited to, carbon sheets, etc.

[0064] In another embodiment, similar to the structure of the first electrode sheet 21, the inductor 221 includes a second sheet and a second conductive layer located on the second sheet.

[0065] In one optional implementation, the elasticity of the first sheet 211 is greater than that of the second sheet, and the second sheet is a rigid sheet that is not easily deformed. Therefore, the capacitance change is only affected by the deformation of the first sheet 211.

[0066] In one optional embodiment, the first conductive layer 212 and the second conductive layer are arranged facing each other, that is, the first conductive layer 212 is located on the side of the first electrode sheet 21 facing the inductor 221, and the second conductive layer is located on the side of the inductor 221 facing the first electrode sheet 21. The two conductive layers are directly facing each other, and the capacitance measurement is not affected by the sheet material, resulting in high sensitivity.

[0067] In one optional embodiment, the first conductive layer 212 and the second conductive layer are made of the same material. The influence of the same material on charge movement is fixed. During the use of the battery 1 monitoring system, the change in capacitance value can remain consistent, thereby improving the accuracy of monitoring.

[0068] The fixing part 222 is used to fix the second electrode piece 22. In this invention, the fixing part 222 is integrally formed or spliced ​​with the inductor part 221.

[0069] The fixing part 222 is located on one side of the inductor part 221, so that the inductor part 221 and the first electrode plate 21 are spaced apart.

[0070] The connection between the second electrode plate 22 and the housing 11 includes, but is not limited to, the following methods.

[0071] like Figures 1 to 11 As shown, when the second electrode plate 22 and the first electrode plate 21 are separately disposed, the two electrode plates are respectively fixed to the housing 11. The first electrode plate 21 is fixed in the manner described above; the second electrode plate 22 can be directly or indirectly fixed to the housing 11.

[0072] In one embodiment, the second electrode 22 is directly connected to the housing 11 by fasteners, including but not limited to screws, rivets, etc.

[0073] In another embodiment, the second electrode sheet 22 is directly welded or attached to the housing 11.

[0074] In another embodiment, the second electrode 22 is directly interference-fitted with the mounting hole on the housing 11.

[0075] In another embodiment, the second electrode 22 is detachably and indirectly fixed to the housing 11 by means of a fixing seat.

[0076] Of course, the second electrode plate 22 and the housing 11 can also be fixed in other existing ways.

[0077] When the second electrode plate 22 is integrally disposed with the first electrode plate 21, such as Figure 12 and Figure 13 As shown, the first electrode plate 21 and / or the second electrode plate 22 are used to fix the electrode plate to the housing 11. That is, by fixing the first electrode plate 21 to the housing 11 as described above, the second electrode plate 22 is fixed to the first electrode plate 21 and the housing 11 in an integral manner; or by fixing the second electrode plate 22 to the housing 11 as described above, the second electrode plate 22 is fixed to the first electrode plate 21 and the housing 11 in an integral manner.

[0078] In an optional embodiment, the fixing portion 222 of the second electrode piece 22 is fixed to the outer edge of the first electrode piece 21, and the shape of the second electrode piece 22 combined with the first electrode piece 21 matches the shape of the mounting portion 113. The second electrode piece 22 and the first electrode piece 21 are pressed together and / or glued to the mounting portion 113. The initial distance between the first electrode piece 21 and the second electrode piece 22 is d1, and the maximum deformation of the first electrode piece 21 is d2, where d2 is 50% to 80% of d1, ensuring monitoring sensitivity.

[0079] In a preferred embodiment, the initial distance d1 is 2mm to 10mm.

[0080] The capacitance monitor is electrically connected to the first electrode plate 21 and the second electrode plate 22, and monitors the capacitance value in real time to monitor the health of the battery 1. In an optional embodiment, the monitoring accuracy of the capacitance monitor is accurate to pF (picofarad), thereby improving the monitoring sensitivity.

[0081] The inventors discovered that the elastic deformation of the first electrode sheet 21 can also cause a change in its resistance value, such as an increase. Specifically, when the first electrode sheet 21 undergoes elastic deformation, the first conductive layer 212 may develop minute cracks, thereby causing an increase in the resistance of the first electrode sheet 21.

[0082] The battery health monitoring system 100 also includes a resistance monitor for monitoring the resistance of the first electrode plate 21. By monitoring the resistance change of the first electrode plate 21, the health of the battery 1 can be determined.

[0083] In an optional implementation, the battery health monitoring system 100 further includes an early warning module, which is communicatively connected to the monitoring unit 2. The early warning module issues an alarm when the capacitance exceeds a warning value. When the real-time detected capacitance value is greater than a predetermined threshold, or when the capacitance value increment / capacity value growth rate is greater than a corresponding predetermined threshold, the early warning module issues an alarm to remind the user that the battery 1 has low health, prompting them to investigate potential safety hazards in the battery 1 or replace the battery 1.

[0084] The value of the predetermined threshold for capacitance value / the predetermined threshold for capacitance value increment / the predetermined threshold for capacitance value growth rate can be determined comprehensively based on parameters such as the initial capacitance value of the actual capacitor, the effective area of ​​the first electrode plate 21, the total volume of the battery 1, and the ambient temperature.

[0085] Specifically, the warning module includes a touch display device. After the warning is activated, the display device shows graphic or text information corresponding to the over-limit status of the capacitance value / capacitance value increment / capacitance value growth rate. This graphic or text information is used to inform the user of the battery 1's health status or provide corresponding handling suggestions. The warning module may also include an audible alarm device, which emits an alarm sound upon receiving a signal.

[0086] In an optional embodiment, the battery health monitoring system 100 further includes an early warning module and a control module, with the control module being communicatively connected to both the early warning module and the monitoring unit 2.

[0087] The control module has various preset thresholds, and the output of the capacitance monitor is connected to the input of the control module to transmit the real-time capacitance value to the control module.

[0088] The control module compares the real-time detected capacitance value with a preset capacitance threshold, outputs the comparison result to the early warning module, and controls the early warning module to issue an early warning message. Alternatively, the control module calculates the capacitance increment / capacitance growth rate, compares this increment / growth rate with a corresponding preset threshold, outputs the comparison result to the early warning module, and controls the early warning module to issue an early warning message.

[0089] The present invention also provides a vehicle equipped with the aforementioned battery health monitoring system to improve vehicle safety. In the application of this battery health monitoring system to a vehicle, the control module and the early warning module are preferably integrated into the vehicle's overall control system.

[0090] In summary, the battery health monitoring system 100 of the present invention obtains the gas generation situation inside the battery 1 by real-time detection of the capacitance value, capacitance value change amount, or capacitance value change rate between the first electrode plate 21 and the second electrode plate 22. This allows the generation of trace amounts of gas inside the battery 1, and the first electrode plate 21 can also undergo elastic deformation under gas pressure. The resulting increase in capacitance value can be monitored in real time, exhibiting high sensitivity. It can make judgments and provide early warnings at the initial stage of battery health decline (before bulging occurs), reminding users to pay attention to the health of the battery 1, so as to identify potential safety hazards and replace the battery 1 as early as possible, effectively preventing safety accidents and greatly improving the safety of new energy vehicles. Furthermore, the monitoring system and the battery 1 are integrated into a single design, resulting in a compact structure and low detection cost.

[0091] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A battery health monitoring system, comprising a battery, the battery including a casing and a battery body located within the casing, characterized in that: The housing is provided with a monitoring hole; the battery health monitoring system further includes a monitoring unit, the monitoring unit including a first electrode plate, a second electrode plate, and a capacitance monitor that are sealed and connected to the monitoring hole; the first electrode plate and the housing form a sealed space that seals the battery body, and the first electrode plate is an elastic sheet; the second electrode plate includes an inductor portion and a fixing portion for fixing the inductor portion, which are spaced apart from the first electrode plate; both the first electrode plate and the inductor portion are electrically connected to the capacitance monitor.

2. The battery health monitoring system according to claim 1, characterized in that: The first electrode sheet includes a first sheet and a first conductive layer located on the surface of the first sheet.

3. The battery health monitoring system according to claim 2, characterized in that: The first sheet is a fluorinated rubber, preferably selected from Viton or PFA; The conductive layer is selected from at least one or more combinations of metal paste layer, conductive non-metal paste layer or metal sheet; The metal paste layer is selected from at least one or a combination of silver paste layer, copper paste layer or aluminum paste layer; The conductive non-metallic paste layer is selected from at least one or a combination of carbon paste layer, graphene layer, and carbon nanotube layer; The metal sheet is selected from at least one or more combinations of copper sheet, silver sheet, silver-copper alloy sheet, and aluminum-copper alloy sheet.

4. The battery health monitoring system according to claim 1, characterized in that: The elastic modulus of the first electrode sheet is not higher than 3.0 MPa, and / or the thickness of the first electrode sheet is 1 mm to 3 mm.

5. The battery health monitoring system according to claim 1, characterized in that: The area of ​​the first electrode sheet is larger than the area of ​​the monitoring hole, and the first electrode sheet is attached to the outside of the housing; or, the first electrode sheet is embedded in the monitoring hole; or, the monitoring hole of the housing is provided with a mounting part, and the first electrode sheet is fixed on the mounting part.

6. The battery health monitoring system according to claim 1, characterized in that: The first electrode and the second electrode are integrally formed, the area of ​​the first electrode is larger than the area of ​​the monitoring hole, and the first electrode is attached to the outside of the housing; or, the first electrode is embedded in the monitoring hole; or, the monitoring hole of the housing is provided with a mounting part, and the first electrode and / or the second electrode are fixed on the mounting part. Alternatively, the first electrode and the second electrode are separately disposed, with the area of ​​the first electrode being larger than the area of ​​the monitoring hole, and the first electrode being attached to the outside of the housing; or, the first electrode is embedded in the monitoring hole; or, the monitoring hole of the housing is provided with a mounting part, and the first electrode is fixed to the mounting part; the second electrode is connected to the housing by fasteners, or the second electrode is welded or pasted to the housing, or the second electrode is interference-fitted with the mounting hole of the housing, or the second electrode is detachably fixed to the housing by a fixing seat.

7. The battery health monitoring system according to claim 1, characterized in that: The first electrode sheet includes a first sheet and a first conductive layer on the first sheet, the first conductive layer being located on the surface of the first sheet facing the inductor; the inductor includes a second sheet and a second conductive layer on the second sheet, the second conductive layer being located on the surface of the second sheet facing the first electrode sheet; The first conductive layer is made of the same material as the second conductive layer.

8. The battery health monitoring system according to claim 1, characterized in that: The initial distance between the first electrode and the inductor is d1, and the maximum deformation of the first electrode is d2, which is 50% to 80% of d1.

9. The battery health monitoring system according to claim 1, characterized in that: The battery health monitoring system also includes a resistance monitor electrically connected to the first electrode sheet; Alternatively, the battery health monitoring system may further include an early warning module, which is communicatively connected to the monitoring unit; Alternatively, the battery health monitoring system may further include an early warning module and a control module, wherein the control module is communicatively connected to both the early warning module and the monitoring unit.

10. A vehicle, characterized in that, Includes the battery health monitoring system according to any one of claims 1 to 9.

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