Battery health degree monitoring system and vehicle

Abstract

The utility model 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 disclosed by the utility model, 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, and the sensitivity is high; the method can make a judgment in the germination stage when the health degree of the battery declines, and reminds a user to pay attention to the health degree of the battery.

Description

Technical Field

[0001] The utility model relates to battery health management, in particular to a battery health monitoring system and a vehicle. Background Art

[0002] At present, storage batteries are 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, explosion accidents, etc., it has caused great potential safety hazards to the life and property safety of users. The use safety of storage batteries for new energy vehicles has been pushed to the forefront and has gradually become one of the most concerned issues of users.

[0003] When a storage battery fails or the battery ages, the internal electrolyte will decompose to generate gas. As the amount of generated gas increases, it will also cause the battery to bulge and deform, and then accidents such as internal short circuit, fire and explosion of the battery will occur. Therefore, it is necessary and urgent to develop a monitoring system for the health of storage batteries, especially a monitoring system that can give an early warning at the budding stage of the decline of battery health.

[0004] At present, the common method for monitoring the safety of storage batteries is pressure monitoring. This scheme requires an additional pressure sensing element to sense the pressure change outside the battery. The problems existing in this monitoring method are that only when the amount of gas generated in the storage battery reaches a certain level and the gas expands to deform the battery shell can the corresponding pressure change be monitored. The sensitivity is relatively low, the early warning function is lagging, and this configuration occupies a large space and has a high cost.

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

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

[0007] To achieve the above utility model purpose, the utility model adopts the following technical scheme:

[0008] A battery health monitoring system includes a battery. The battery includes a housing and a battery body located inside the housing, and a monitoring hole is provided on the housing. The battery health monitoring system further includes a monitoring unit. The monitoring unit includes a first electrode plate, a second electrode plate and a capacitance monitor that are hermetically connected to the monitoring hole. The first electrode plate and the housing form a closed space that seals the battery body, and the first electrode plate is an elastic plate. The second electrode plate includes an inductance part spaced from the first electrode plate and a fixing part for fixing the inductance part. Both the first electrode plate and the inductance part are electrically connected to the capacitance monitor.

[0009] In an alternative 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 alternative embodiment, the thickness of the first electrode sheet is 1 mm to 3 mm.

[0011] In an alternative 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, an installation portion is provided at the monitoring hole of the housing, and the first electrode sheet is fixed on the installation portion.

[0012] In an alternative embodiment, the first electrode sheet and the second electrode sheet are integrally provided; 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, an installation portion is provided at the monitoring hole of the housing, and the first electrode sheet and / or the second electrode sheet are fixed on the installation portion.

[0013] In an alternative 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, an installation portion is provided at the monitoring hole of the housing, and the first electrode sheet is fixed on the installation portion; the second electrode sheet is connected to the housing by a fastener, or the second electrode sheet is welded or pasted on the housing, or the second electrode sheet is in interference fit connection with the installation hole of the housing, or the second electrode sheet is detachably fixed to the housing through a fixing seat.

[0014] In an alternative embodiment, the first electrode sheet includes a first sheet and a first conductive layer located on the first sheet, and the first conductive layer is located on the surface of the first sheet facing the inductor portion; the inductor portion includes a second sheet and a second conductive layer located on the second sheet, and the second conductive layer is located on the surface of the second sheet facing the first electrode sheet.

[0015] In an alternative embodiment, the initial distance between the first electrode sheet and the inductor portion is d1, and the maximum deformation amount of the first electrode sheet is d2, and d2 is 50% to 80% of d1.

[0016] In an alternative embodiment, the battery health monitoring system further includes a resistance monitor electrically connected to the first electrode sheet.

[0017] In an alternative embodiment, the battery health monitoring system further includes an early warning module, and the early warning module is communicatively connected to the monitoring unit.

[0018] In an alternative embodiment, the battery health monitoring system further includes an early warning module and a control module, and the control module is communicatively connected to both the early warning module and the monitoring unit.

[0019] A vehicle includes the battery health monitoring system described above.

[0020] The beneficial effects of the present utility model are as follows: The battery health monitoring system of the present utility model can obtain the gas generation situation inside the battery by detecting the capacitance value, capacitance change amount, or capacitance change rate between the first electrode plate and the second electrode plate in real time. Even if a small amount of gas is generated inside the battery, the first electrode plate can also undergo elastic deformation under the action of air pressure, and the increase in capacitance value caused by this deformation amount can be monitored in real time. It has high sensitivity and can make a judgment at the budding stage of the decline in battery health (before bulging occurs), reminding users to pay attention to the battery health, so as to facilitate early detection of battery safety hazards and battery replacement, effectively preventing the occurrence of safety accidents, greatly improving the use safety of new energy vehicles, and the monitoring system and the battery are integrally designed, with a compact structure and low detection cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the battery health monitoring system in an embodiment of the present utility model;

[0022] Figure 2 is Figure 1 a partial enlarged view of part A in

[0023] Figure 3 is Figure 2 a schematic diagram when the battery bulges;

[0024] Figure 4 is Figure 1 a schematic structural diagram of the first electrode plate in

[0025] Figure 5 is a schematic diagram of the first electrode plate in another embodiment of the present utility model;

[0026] Figure 6 is Figure 5 a top view of

[0027] Figure 7 is a schematic diagram of the first electrode plate in another embodiment of the present utility model;

[0028] Figure 8 It is a schematic structural diagram of the battery health monitoring system in another embodiment of the present utility model;

[0029] Figure 9 is Figure 8 a partial enlarged view of part B in

[0030] Figure 10 This is a schematic structural diagram of the battery health monitoring system in another embodiment of the present utility model;

[0031] Figure 11 This is a schematic structural diagram of the battery health monitoring system in another embodiment of the present utility model;

[0032] Figure 12 This is a schematic structural diagram of the battery health monitoring system in another embodiment of the present utility model;

[0033] Figure 13 is Figure 12 exploded view of.

[0034] Among them, 100 - battery health monitoring system, 1 - battery, 11 - housing, 110 - monitoring hole, 111 - first limiting structure, 112 - second limiting structure, 113 - mounting part, 12 - battery body, 2 - monitoring unit, 21 - first electrode plate, 211 - first sheet, 212 - first conductive layer, 213 - anti - corrosion layer, 22 - second electrode plate, 221 - inductance part, 222 - fixing part. Specific embodiments

[0035] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail below with reference to specific embodiments.

[0036] The present utility model provides a battery health monitoring system, aiming to be able to detect corresponding signals at the budding stage when the battery health deteriorates, so as to detect battery safety hazards as early as possible and effectively prevent the occurrence of safety accidents.

[0037] Please refer to Figures 1 to 13 As shown, it is the battery health monitoring system 100 of the embodiment of the present utility model, which includes a battery 1 and a monitoring unit 2. The monitoring unit 2 is used to monitor the health of the battery 1 and give a risk signal in a timely manner.

[0038] The battery 1 is a storage battery 1, including but not limited to lead - acid storage batteries, nickel - cadmium storage batteries, nickel - metal hydride batteries, lithium - ion batteries, etc.

[0039] Specifically, the battery 1 includes a housing 11 and a battery main body 12 located inside the housing 11. The housing 11 is made of a hard material such as ABS plastic, PP plastic, or HDPE resin to protect the internal battery main body 12. The battery main body 12 contains an electrolyte. When the battery 1 fails or ages, the internal electrolyte will decompose to generate gas. As the amount of generated gas increases, the temperature and pressure inside the housing 11 will increase, causing the battery to bulge and deform, and then accidents such as internal short circuit, fire, and explosion of the battery will occur. For other structures of the battery 1, reference can be made to related technologies and will not be elaborated here.

[0040] A monitoring hole 110 is provided on the housing 11 for installing the monitoring unit 2. The monitoring hole 110 is located on the top wall or the side wall of the housing 11. Considering that the gas generated in the closed 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.

[0041] A plurality of monitoring holes 110 are provided on the housing 11, and correspondingly, multiple groups of the monitoring units 2 are installed. The multiple groups of the monitoring units 2 are distributed in different parts of the housing 11 to monitor in multiple areas, which is more accurate; and it can prevent unnecessary risks caused when a certain detection unit 2 fails or has an error.

[0042] The monitoring unit 2 includes a first electrode sheet 21, a second electrode sheet 22 that are hermetically connected to the monitoring hole 110, and a capacitance monitor that is electrically connected to both the first electrode sheet 21 and the second electrode sheet 22.

[0043] Among them, "the first electrode sheet 21 is hermetically connected to the monitoring hole 110" can be understood as the first electrode sheet 21 sealing the monitoring hole 110. The first electrode sheet 21 and the housing 11 form a closed space, and the battery main body 12 is located in the closed space.

[0044] The inductive part 221 of the first electrode sheet 21 and the second electrode sheet 22 forms a capacitor, and the first electrode sheet 21 is an elastic sheet, and the capacitance changes with the distance between the first electrode sheet 21 and the inductive part 221. When the battery 1 is operating normally, the air pressure in the closed space is basically constant, the first electrode sheet 21 is not subjected to pressure, the distance between the first electrode sheet 21 and the inductive part 221 remains at the initial distance d1, and the measured capacitance is within the threshold. When a fault occurs in the battery 1 at the beginning, gas is generated in the closed space, and the air pressure in the closed space gradually increases. The squeezing effect of this air pressure causes the first electrode sheet 21 to deform in the direction close to the inductive part 221. The distance between the first electrode sheet 21 and the inductive part 221 decreases, and the capacitance value between the two increases accordingly. When the capacitance value or the capacitance value increment or the capacitance value growth rate reaches the corresponding predetermined threshold, it indicates that the health of the battery 1 is low and safety inspection or replacement is required.

[0045] 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 can undergo a sufficiently large elastic deformation in a timely manner, causing a change in the capacitance between the first electrode sheet 21 and the second electrode sheet 22.

[0046] In an optional embodiment, the thickness of the first electrode sheet 21 is 1 mm to 3 mm. When the pressure inside the battery 1 increases, the first electrode sheet 21 can undergo a sufficiently large elastic deformation in a timely manner, causing a change in the capacitance between the first electrode sheet 21 and the second electrode sheet 22.

[0047] In the present utility model, 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 the base material, and the first conductive layer 212 serves as an electrode to form the capacitor with the inductive part 221.

[0048] The first sheet 211 is preferably a fluorine-containing rubber, which can resist the corrosion of the electrolyte in the battery main body 12, improve the durability of the battery 1, and itself has elasticity and can undergo elastic deformation when subjected to pressure. Optionally, the sheet is viton or PFA, taking into account both elasticity and anti-corrosion.

[0049] The first conductive layer 212 is selected from at least one or a combination 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 a combination of a silver paste layer, a copper paste layer, an aluminum paste layer, etc.; the conductive non-metal paste layer is selected from at least one or a combination of a carbon paste layer, a graphene layer, a carbon nanotube layer, etc.; the metal sheet is selected from at least one or a combination of a copper sheet, a silver sheet, a silver-copper alloy sheet, an aluminum-copper alloy sheet, etc.

[0050] 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 possibly corroding the first conductive layer 212 and ensure the accuracy of the monitoring system.

[0051] In another embodiment, please refer to Figure 7 As described, 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.

[0052] The elastic modulus of the anti-corrosion layer 213 is not lower than that of the first sheet 211 to avoid restricting the elastic deformation of the first sheet 211. The material of the anti-corrosion layer 213 can be selected as the material of the first sheet 211, and the two are preferably the same.

[0053] The connection method between the first electrode sheet 21 and the housing 11 includes but is not limited to the following several types.

[0054] In one implementation manner, 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, and the first electrode sheet 21 is attached to the outside of the housing 11, and can be specifically fixed by pressure attachment or adhesive attachment, with a simple process. Of course, other existing attachment methods can also be used for fixation.

[0055] On this basis, please refer to Figure 4 As described, the first conductive layer 222 covers the entire surface of the first sheet 211. Or please refer to Figure 5 , Figure 6 As shown, the first conductive layer 222 is located in the middle area of the first sheet 211, and the edge is attached to the housing 11 and will not undergo elastic deformation, so the absence of the first conductive layer 222 does not affect capacitance measurement.

[0056] In another implementation manner, please refer to Figures 8 to 11 As shown, the first electrode sheet 21 is embedded in the monitoring hole 110.

[0057] In one embodiment, please refer to Figures 8 to 10 As shown, the first electrode sheet 21 is installed in an interference fit with the monitoring hole 110 to achieve sealing. Specifically, the shapes and sizes of the first electrode sheet 21 and the monitoring hole 110 are adapted to each other, and the installation is achieved by the elastic interference fit of the first electrode sheet 21 itself.

[0058] In an alternative embodiment, in the direction from outside to inside, the area of the monitoring hole 110 first becomes larger and then smaller, and the first electrode sheet 21 is clamped in the monitoring hole 110. Alternatively, the housing further includes a first limiting structure 111 at the outer end of the monitoring hole 110 and a second limiting structure 112 at the inner end thereof. The first electrode sheet 21 is clamped between the first limiting structure 111 and the second limiting structure 112 to prevent falling off, and at the same time, the sealing performance is improved.

[0059] In another embodiment, please refer to Figure 11 As shown, the first electrode sheet 21 is screwed into the monitoring hole 110, which is convenient for installation and has good sealing performance. Specifically, the inner side wall of the monitoring hole 110 is provided in a threaded shape, and the side edge of the first electrode sheet 21 is correspondingly provided in a concave-convex shape matching the inner side wall to ensure the sealed connection between the first electrode sheet 21 and the housing 11.

[0060] In another implementation manner, please refer to Figure 12 and Figure 13 As shown, an installation portion 113 is provided at the monitoring hole 110 of the housing 11, and the first electrode sheet 21 is fixed on the installation portion 113, and specifically, it can be fixed by pressure bonding and / or adhesive bonding, and the process is simple. In this embodiment, the installation portion 113 is in a stepped shape; in other embodiments, the installation portion 113 can also be in other shapes.

[0061] The second electrode sheet 22 includes a sheet-shaped inductance portion 221 and a fixing portion 222. The inductance portion 221 and the first electrode sheet 21 form a capacitor, and both the first electrode sheet 21 and the inductance portion 221 are electrically connected to the capacitance monitor 2.

[0062] The inductance portion 221 is made of any sheet material capable of conducting electricity, and can form a capacitor with the first electrode sheet 21. In one embodiment, the inductance portion 221 is a metal sheet, a conductive non-metal sheet (such as carbon, etc.) or a metal and conductive non-metal doped sheet. The metal sheet is selected from but not limited to stainless steel sheets, copper sheets, etc., and the conductive non-metal sheet is selected from but not limited to carbon, etc.

[0063] In another embodiment, similar to the structure of the first electrode sheet 21, the inductance portion 221 includes a second sheet material and a second conductive layer located on the second sheet material.

[0064] In an alternative embodiment, 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 amount of the first sheet 211.

[0065] In an alternative 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 portion 221, and the second conductive layer is located on the side of the inductor portion 221 facing the first electrode sheet 21. The two conductive layers face each other directly, and the capacitance measurement is not affected by the sheet material, resulting in high sensitivity.

[0066] In an alternative embodiment, the materials of the first conductive layer 212 and the second conductive layer are the same. The influence of the same material on the movement of charges is fixed. During the use of the battery 1 monitoring system, the change in capacitance value can remain consistent, thereby improving the monitoring accuracy.

[0067] The fixing portion 222 is used to fix the second electrode sheet 22. In the present utility model, the fixing portion 222 and the inductor portion 221 are integrally provided or spliced together.

[0068] The fixing portion 222 is located on one side of the inductor portion 221, such that the inductor portion 221 and the first electrode sheet 21 are spaced apart.

[0069] The connection manner between the second electrode sheet 22 and the housing 11 includes but is not limited to the following several ways.

[0070] As Figures 1 to 11 shown, when the second electrode sheet 22 is separately provided from the first electrode sheet 21, the two electrode sheets are respectively fixed to the housing 11. The first electrode sheet 21 is fixed in the above manner; the second electrode sheet 22 can be directly or indirectly fixed to the housing 11.

[0071] In one embodiment, the second electrode sheet 22 is directly connected to the housing 11 by a fastener, and the fastener includes but is not limited to screws, rivets, etc.

[0072] In another embodiment, the second electrode sheet 22 is directly welded or pasted onto the housing 11.

[0073] In another embodiment, the second electrode sheet 22 is directly connected to the mounting hole on the housing 11 by interference fit.

[0074] In another embodiment, the second electrode sheet 22 is detachably and indirectly fixed to the housing 11 through a fixing seat.

[0075] Of course, the second electrode sheet 22 and the housing 11 can also be fixed by other existing methods.

[0076] When the second electrode sheet 22 is integrally provided with the first electrode sheet 21, as Figure 12 and Figure 13 shown, the fixing to the housing 11 is achieved through the first electrode sheet 21 and / or the second electrode sheet 22. That is, through the above-mentioned fixing manner of the first electrode sheet 21 to the housing 11, the fixing of the integrated second electrode sheet 22, the first electrode sheet 21 and the housing 11 is achieved; or through the above-mentioned fixing manner of the second electrode sheet 22 to the housing 11, the fixing of the integrated second electrode sheet 22, the first electrode sheet 21 and the housing 11 is achieved.

[0077] In an alternative embodiment, the fixing portion 222 of the second electrode sheet 22 is fixed on the outer edge of the first electrode sheet 21, and the shape of the combined second electrode sheet 22 and the first electrode sheet 21 matches the shape of the mounting portion 113. The second electrode sheet 22 and the first electrode sheet 21 are pressed and adhered and / or glued to the mounting portion 113 together. The initial distance between the first electrode sheet 21 and the second electrode sheet 22 is d1, and the maximum deformation amount of the first electrode sheet 21 is d2. d2 is 50% - 80% of d1 to ensure the monitoring sensitivity.

[0078] In a preferred embodiment, the initial distance d1 is 2 mm - 10 mm.

[0079] The capacitance monitor is electrically connected to the first electrode sheet 21 and the second electrode sheet 22, and the capacitance value of the capacitance is detected in real time to monitor the health of the battery 1. In an alternative embodiment, the monitoring accuracy of the capacitance monitor is accurate to pF (picofarad) to improve the monitoring sensitivity.

[0080] The inventor's research found that: the elastic deformation of the first electrode sheet 21 will also cause the resistance value of the first electrode sheet 21 to change, such as increase. Specifically, when the first electrode sheet 21 undergoes elastic deformation, fine cracks may appear in the first conductive layer 212, thereby causing the resistance of the first electrode sheet 21 to increase.

[0081] The battery health monitoring system 100 further includes a resistance monitor for monitoring the resistance of the first electrode sheet 21. By monitoring the resistance change of the first electrode sheet 21, the health of the battery 1 is assisted in judgment.

[0082] In an alternative embodiment, the battery health monitoring system 100 further includes an early warning module. The early warning module is communicatively connected to the monitoring unit 2 and issues an alarm when the capacitance exceeds the early warning value. When the real-time detected capacitance value is greater than the predetermined capacitance threshold value, or the capacitance increment / capacitance growth rate is greater than the corresponding predetermined threshold value, the early warning module issues an alarm to remind the user that the health of the battery 1 is low, to check for potential safety hazards of the storage battery 1 or to replace the battery 1.

[0083] The magnitudes of the predetermined capacitance threshold value / capacitance increment threshold value / capacitance growth rate threshold value can be comprehensively determined based on parameters such as the initial capacitance value of the actual capacitance, the effective area of the first electrode plate 21, the total volume of the battery 1, and the ambient temperature.

[0084] Specifically, the early warning module includes a touch display device. After the early warning is activated, the display device displays graphic or text information corresponding to the over-limit state of the capacitance value / capacitance increment / capacitance growth rate, and this graphic or text information is used to prompt the user about the health of the battery 1 or corresponding processing suggestions. The early warning module may also include an audible alarm device that emits an alarm sound after receiving a signal.

[0085] In an alternative embodiment, the battery health monitoring system 100 further includes an early warning module and a control module. The control module is communicatively connected to both the early warning module and the monitoring unit 2.

[0086] Various predetermined threshold values as described above are preset in the control module. The output end of the capacitance monitor is connected to the input end of the control module to transmit the real-time detected capacitance value result to the control module.

[0087] The control module compares the real-time detected capacitance value with the preset capacitance threshold value, outputs the comparison result of the capacitance value to the early warning module, and controls the early warning module to issue a warning message. Or, the control module calculates the capacitance increment / capacitance growth rate, compares the capacitance increment / capacitance growth rate with the corresponding predetermined threshold value, outputs the comparison result of the capacitance increment / capacitance growth rate to the early warning module, and controls the early warning module to issue a warning message.

[0088] The present utility model also provides a vehicle equipped with the above-mentioned battery health monitoring system to improve the safety of the vehicle. In the scenario where the battery health monitoring system is applied to a vehicle, the control module and the early warning module are preferably integrated into the vehicle's total control system.

[0089] In summary, for the battery health monitoring system 100 of the present utility model, by detecting the capacitance value, or the change amount of the capacitance value, or the change rate of the capacitance value between the first electrode plate 21 and the second electrode plate 22 in real time, the gas generation situation inside the battery 1 is obtained, so that a small amount of gas is generated inside the battery 1. The first electrode plate 21 can also undergo elastic deformation under the action of air pressure, and the increase in capacitance value brought about by this deformation amount can be monitored in real time, with high sensitivity. It can make judgments and early warning prompts at the budding stage when the health of the battery 1 deteriorates (before bulging occurs), reminding users to pay attention to the health of the battery 1, so as to detect potential safety hazards of the battery 1 and replace the battery 1 as early as possible, effectively preventing the occurrence of safety accidents, greatly improving the use safety of new energy vehicles. Moreover, the monitoring system and the battery 1 are integrally designed, with a compact structure and low detection cost.

[0090] The above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present utility model.

Claims

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

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

3. The battery health monitoring system according to claim 1, wherein: The thickness of the first electrode sheet is 1 mm to 3 mm.

4. The battery health monitoring system according to claim 1, wherein: 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, an installation portion is provided at the monitoring hole of the housing, and the first electrode sheet is fixed on the installation portion.

5. The battery health monitoring system according to claim 1, wherein: The first electrode sheet and the second electrode sheet are integrally provided; 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, an installation portion is provided at the monitoring hole of the housing, and the first electrode sheet and / or the second electrode sheet are fixed on the installation portion.

6. The battery health monitoring system according to claim 1, wherein: 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, an installation portion is provided at the monitoring hole of the housing, and the first electrode sheet is fixed on the installation portion; the second electrode sheet is connected to the housing by a fastener, or the second electrode sheet is welded or pasted on the housing, or the second electrode sheet is in interference fit connection with the mounting hole of the housing, or the second electrode sheet is detachably fixed to the housing through a fixing seat.

7. The battery health monitoring system according to claim 1, wherein: The first electrode sheet includes a first sheet material and a first conductive layer on the first sheet material, and the first conductive layer is located on the surface of the first sheet material facing the inductance portion; the inductance portion includes a second sheet material and a second conductive layer on the second sheet material, and the second conductive layer is located on the surface of the second sheet material facing the first electrode sheet.

8. The battery health monitoring system according to claim 1, wherein: The initial distance between the first electrode sheet and the inductance portion is d1, and the maximum deformation amount of the first electrode sheet is d2, and d2 is 50% to 80% of d1.

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

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

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