Battery, battery module and electrical system

Abstract

The invention provides a battery, a battery module and an electrical system. The battery comprises a shell and at least one liquid level detection assembly, and electrolyte is injected into the shell. The liquid level detection assembly comprises a detection structure located in the shell and a liquid absorption material strip, one end of the liquid absorption material strip is immersed in the electrolyte, the other end of the liquid absorption material strip extends to the position above the liquid level of the electrolyte in the first direction, and the first direction is perpendicular to the liquid level direction of the electrolyte. The detection structure comprises at least one detection section, the detection section is wrapped in the liquid absorption material strip, and the detection section comprises at least one detection point based on the optical fiber surface plasma resonance effect. According to the battery, based on the arrangement of the liquid level detection assembly, accurate dynamic detection of the liquid level of the electrolyte in the battery can be realized, so that the infiltration state of the electrolyte to the pole group is accurately quantified, and the battery has high reliability and stability. And the battery is simple in overall structure and is compatible with the existing battery production and assembly process. The reliability and safety of the battery module and the electrical system are improved.

Description

Technical Field

[0001] This application belongs to the field of battery technology and relates to a battery, battery module and electrical system. Background Technology

[0002] Lithium-ion batteries are widely used in electric vehicles, energy storage systems, and consumer electronics. Their performance and safety are highly dependent on the electrolyte's wetting state. The electrolyte plays a crucial role in ion conduction during battery operation, and its distribution directly affects the battery's capacity, cycle life, and safety. However, during battery use, the excess electrolyte reserved during injection is gradually consumed by the electrode assembly with charge-discharge cycles, leading to insufficient electrolyte and causing problems such as internal short circuits, increased polarization, or capacity decay. Therefore, real-time monitoring of the electrolyte's wetting state (or remaining amount) is essential for ensuring battery performance and reliability. Summary of the Invention

[0003] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a battery, a battery module and an electrical system for real-time detection of the electrolyte wetting state inside the battery.

[0004] To achieve the above and other related objectives, in a first aspect, this application provides a battery, comprising:

[0005] The casing is filled with electrolyte;

[0006] At least one liquid level detection component, including a detection structure and a liquid-absorbing material strip located within a housing; wherein,

[0007] One end of the absorbent material strip is immersed in the electrolyte, and the other end of the absorbent material strip extends along a first direction to above the surface of the electrolyte, the first direction being perpendicular to the surface of the electrolyte.

[0008] The detection structure includes at least one detection segment, which is encapsulated within the liquid-absorbing material strip, and the detection segment includes at least one detection point based on the optical fiber surface plasmon resonance effect.

[0009] In an optional embodiment, the detection segment includes a plurality of detection nodes spaced apart in a first direction.

[0010] In an optional embodiment, the battery further includes an electrode assembly and an insulating structure, both of which are housed within the casing, with the insulating structure spaced between the electrode assembly and the inner wall of the casing; wherein,

[0011] The absorbent material strip is disposed on the side of the insulating structure facing the electrode assembly.

[0012] In an optional embodiment, the absorbent material strip is fixedly connected to the insulating structure.

[0013] In an optional embodiment, the insulating structure is an open quadrangular prism with four side surfaces connected end to end. Two adjacent side surfaces share a first edge, and the extension direction of the first edge is parallel to the first direction. The absorbent material strip is fixed at one of the first edges.

[0014] In an optional embodiment, the detection structure includes two detection segments, and the two detection segments are respectively wrapped within two absorbent material strips at two corresponding first edges on the same side; wherein,

[0015] The detection nodes in different detection segments are arranged in an aligned manner, or the detection nodes in different detection segments are arranged in an alternating manner.

[0016] In an optional embodiment, the battery includes two liquid level detection components, and the two liquid level detection components are spaced apart in a second direction, which is perpendicular to the first direction.

[0017] In an optional embodiment, the battery further includes a cover, which is disposed on the housing, and the cover has a through hole and a sealing structure; wherein,

[0018] The detection structure further includes an input section and an output section, with the detection section connected between the input section and the output section; both the input section and the output section pass through the through hole to extend outside the housing.

[0019] Furthermore, a sealing structure is provided between the via and the input section and the output section.

[0020] Secondly, this application provides a battery module including the battery as described in the first aspect.

[0021] Thirdly, this application provides an electrical system including a battery management unit and a battery module as described in the second aspect, wherein the battery management unit is connected to the liquid level detection component.

[0022] As described above, the battery of this application, based on the liquid level detection component, can achieve precise dynamic detection of the electrolyte level inside the battery, accurately quantifying the electrolyte's wetting state of the electrode assembly, thus exhibiting high reliability and stability. The reliability and safety of the battery are improved. Furthermore, the overall battery structure is simple, compatible with existing battery production and assembly processes, and suitable for large-scale applications. The battery module and electrical system of this application, by including the aforementioned battery, achieve improved reliability and safety. Attached Figure Description

[0023] Figure 1 This is a perspective view of the battery without its cover, as provided in an embodiment of this application.

[0024] Figure 2 This is a perspective view of a battery in a related technology when no liquid level detection component is installed.

[0025] Figure 3 This is a schematic diagram of the structure after the detection structure and the insulation structure are connected, as provided in the embodiments of this application.

[0026] Figure 4 This is a schematic diagram of the detection structure connected to the original insulation structure in an embodiment of this application.

[0027] Figure 5 This is a schematic diagram of the disassembled structure of a battery provided in an embodiment of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10-Electrolyte; 20-Level detection component; 21-Detection structure; 211-Detection section; 212-Detection node; 213-Transition section; 214-Input section; 215-Output section; 22-Absorbent material strip; 30-Electrode group; 40-Insulation structure; 40'-Insulation film; 41-Side surface; 41a-First side surface; 41b-Second side surface; 411-First edge; 412-Second edge; 50-Cover; 51-Through hole; 52-Sealing structure. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0031] Please see Figures 1 to 5 It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] In related technologies, the following methods are used to detect the electrolyte wetting state: 1. Pressure sensor method: Indirectly inferring the electrolyte level by monitoring changes in pressure inside the casing. However, the relationship between pressure changes inside the casing and the electrolyte volume is greatly affected by temperature and charge / discharge status, often resulting in inaccurate detection of electrolyte volume and low accuracy; 2. Electrochemical impedance spectroscopy: Inferring the degree of electrolyte consumption by measuring changes in the cell's impedance. However, the cell's impedance is significantly affected by temperature and current fluctuations, and the response speed is slow; 3. Electrolyte consumption model prediction method: Calculating the remaining electrolyte volume based on the number of charge / discharge cycles, but lacking real-time performance and with large accumulated errors. Therefore, the methods for detecting the electrolyte wetting state in related technologies suffer from insufficient real-time performance, poor reliability, and low sensitivity, and require further improvement.

[0033] This application provides a battery; please refer to [link / reference]. Figure 1 , Figure 1 A perspective view of the battery without its cover is shown. The battery includes a housing (not shown) and at least one liquid level detection component 20. Although Figure 1 The structure of the shell, which is not shown in the diagram, can be understood as... Figure 1 The overall structure shown is located within the internal space of this housing. The "liquid level" in the "liquid level detection assembly" refers to the position (or height) of the electrolyte level.

[0034] Specifically, such as Figure 1 As shown (please refer to the following) Figure 3 The housing is filled with electrolyte 10. The liquid level detection assembly 20 includes a detection structure 21 and a liquid-absorbing material strip 22 located within the housing. One end of the liquid-absorbing material strip 22 is immersed in the electrolyte 10, and the other end of the liquid-absorbing material strip 22 extends along a first direction Z to above the liquid surface of the electrolyte 10, wherein the first direction Z is perpendicular to the direction of the liquid surface of the electrolyte 10. The detection structure 21 includes at least one detection segment 211, which is covered by the liquid-absorbing material strip 22, and the detection segment 211 includes at least one detection point 212 based on the surface plasmon resonance effect of an optical fiber.

[0035] In this embodiment, the battery includes a liquid level detection component 20 disposed within the casing. Through the wetting coupling of the absorbent material strip 22 with the electrolyte 10, the detection node 212 can respond dynamically and in real time to changes in liquid level. Furthermore, the capillary action of the absorbent material strip 22 stabilizes the distribution of the electrolyte 10, preventing false detections caused by battery shaking or tilting. This helps ensure the reliability of the electrolyte 10's liquid level detection, and the detection accuracy is superior to that of a pressure sensor. When the battery is placed normally (with the battery cover on top and the casing below), the absorbent material strip 22 should be perpendicular to the surface of the electrolyte 10.

[0036] In some embodiments, the detection structure 21 includes an optical fiber, and the detection node 212 is a metal thin film disposed on the optical fiber. The absorbent material strip 22 responds to changes in its electrical properties (e.g., conductivity) caused by changes in the liquid level of the electrolyte 10, and the optical properties of the detection structure 21 (e.g., broadening or amplitude of the resonance peak of the optical signal) respond to changes in the electrical properties of the absorbent material strip 22. For example, the detection node 212 is a nanoscale metal thin film (e.g., a gold or silver film) deposited after removing part of the cladding along the side of the optical fiber. When the electrolyte content absorbed by the absorbent material strip 22 varies, the conductivity (and refractive index) of the absorbent material strip 22 adsorbing the electrolyte 10 changes, thereby causing a change in the optical signal transmitted in the optical fiber.

[0037] In this embodiment, an optical fiber and a detection node 212 based on the fiber optical surface plasmon resonance (FO-SPR) effect are used to detect changes in the electrolyte level 10. The absorbent material strip 22 is used to adsorb the electrolyte 10. The FO-SPR effect is highly sensitive to changes in the conductivity of the absorbent material strip 22 (which varies with the amount of adsorbed electrolyte). Based on this conductivity change, the content of electrolyte adsorbed by the absorbent material strip 22 and the liquid level height are calculated, resulting in high sensitivity. Furthermore, the light sensing is not affected by the strong electromagnetic field inside the electric field, and the detection result is directly related to the electrolyte level 10. It is less affected by temperature and electrical fluctuations, and its detection accuracy is superior to sensors that rely on electrical characteristics (e.g., capacitive sensors).

[0038] Specifically, in this embodiment, the liquid level detection component 20 is used to detect the liquid level (and wetting state) of the electrolyte 10. The liquid-absorbing material strip 22 adsorbs the electrolyte 10 based on capillary action, and the liquid absorption height of the liquid-absorbing material strip 22 is positively correlated with the real-time liquid level (or remaining amount) of the electrolyte 10. When the electrolyte 10 wets the liquid-absorbing material strip 22, the local conductivity (and refractive index) of the liquid-absorbing material strip 22 will change (for example, after adsorbing the electrolyte 10, the conductivity of the liquid-absorbing material strip 22 will increase). The detection node 212 covered by the liquid-absorbing material strip 22 can respond to the change in conductivity of the liquid-absorbing material strip 22 based on the FO-SPR effect, and the liquid level height can be determined based on optical signal modulation. For example, when the electrolyte 10 is insufficient, the electrolyte level will drop, resulting in insufficient wetting of the upper part of the absorbent material strip 22 with electrolyte 10. This causes a significant decrease in the conductivity detected by the detection node 212 at the corresponding position. Subsequently, by transmitting the optical signal to the photoelectric conversion and analysis module outside the battery casing, the response curves of the detection node 212 at different positions (or heights) (corresponding to the real-time curves of conductivity wetting state) can be generated after data processing, thereby reflecting the electrolyte level 10 in real time and accurately.

[0039] In some embodiments, as Figure 1 As shown, the battery also includes an electrode assembly 30 and an insulating structure 40, both of which are housed within the casing. The insulating structure 40 is positioned between the electrode assembly 30 and the inner wall (including the bottom wall and side wall) of the casing. A liquid-absorbing material strip 22 is disposed on the side of the insulating structure 40 facing the electrode assembly 30.

[0040] Furthermore, the end of the absorbent material strip 22 near the bottom wall of the casing is no higher than the minimum safe level of the electrolyte 10. The "minimum safe level" refers to the level at which the electrolyte 10 is consumed as it gradually decreases during battery use, corresponding to the limit of electrolyte 10 consumption allowed by the battery design. When the electrolyte 10 level falls below the minimum safe level, the electrode assembly 30 may experience localized dry areas due to electrolyte 10 supply interruption, leading to lithium plating or dendrite growth and a short circuit risk; localized overheating may trigger thermal runaway; and increased lithium-ion transport polarization may cause a significant capacity drop. Please refer to the comparison. Figure 2 , Figure 2 A perspective view of a battery in the related art without the liquid level detection component is shown.

[0041] In some embodiments, please refer to Figure 3 , Figure 3 A schematic diagram of the liquid level detection component connected to the insulating structure is shown, with the liquid-absorbing material strip 22 fixedly connected to the insulating structure 40. The insulating structure 40 is composed of an insulating film 40' (folded) (please refer to the attached diagram). Figure 4 For example, the absorbent strip 22 can be heat-fused to the insulating structure 40. The insulating film 40' can be a smooth plastic film with a certain rigidity, such as polypropylene or polyester material, without absorbent holes on the surface, and can isolate the electrode assembly 30 (liquid level detection component 20) from the housing.

[0042] In this embodiment, the fixed connection between the absorbent material strip 22 and the insulating structure 40 prevents the detection structure 21 from shifting or tilting due to battery vibration or shaking during battery use or transportation, thus ensuring the fixed position of the detection structure 21 and the detection node 212. Please also refer to... Figure 4 , Figure 4A schematic diagram of the structure connecting the detection structure to the insulating film is shown. Before the insulating film 40' forms the insulating structure 40 and is assembled or placed inside the housing, the liquid level detection component 20 can be connected to one side of the insulating film 40'. The structure of the detection structure 21 changes position as the insulating film 40' is assembled, and then it is assembled into the housing along with the insulating structure 40. This simplifies the overall battery assembly process and reduces its complexity, improving assembly efficiency. Otherwise, if the insulating structure 40 is placed inside the housing and then the liquid level detection component 20 is installed, the operating space is limited and the position of the liquid level detection component 20 is difficult to fix, which may hinder the subsequent assembly of the electrode assembly 30. If the electrode assembly 30 is assembled into the internal area of ​​the insulating structure 40 and then the liquid level detection component 20 is installed, the assembly difficulty of the liquid level detection component 20 increases significantly due to the small gap between the electrode assembly 30 and the insulating structure 40. This may even cause wear on the insulating structure 40 or the electrode assembly 30 during assembly, affecting the overall yield and assembly efficiency.

[0043] In some embodiments, as Figure 1 , Figure 3 and Figure 4 As shown, the detection segment 211 includes multiple detection nodes 212 spaced apart in the first direction Z. With only one detection node 212 in the detection structure 21, detection can only be performed at specific locations of the electrolyte 10 level (e.g., the minimum safe level), limiting its practical application. Therefore, the arrangement of multiple detection nodes 212 enables discrete positioning detection of the electrolyte level (and thus real-time continuous monitoring of the electrolyte 10 level), with significantly better detection accuracy and reliability than single-point detection. Furthermore, the multiple detection nodes 212 can be evenly spaced, or arranged with increasing spacing along the direction away from the bottom wall of the casing. For example, in applications requiring high detection accuracy, a larger number of detection nodes 212 can be set. Similarly, in applications where the electrolyte 10 level is close to the minimum safe level, the density of detection nodes 212 along the direction away from the bottom wall of the casing can be denser. In other words, the number and spacing of the detection nodes 212 are selected based on actual needs.

[0044] In some embodiments, as Figure 3 As shown, the insulating structure 40 is an open quadrangular prism with four side surfaces 41 connected end-to-end (the side surfaces 41 extend along the first direction Z). Adjacent side surfaces 41 share a first edge 411, and the extension direction of the first edge 411 is parallel to the first direction Z. The absorbent material strip 22 is fixed to one of the first edges 411. The aforementioned "bottom wall of the shell" is parallel to and in contact with the bottom surface of the insulating structure 40, which is the surface of the insulating structure 40 that is connected to all four side surfaces 41.

[0045] In this embodiment, since the insulating structure 40 is spaced between the electrode group 30 and the housing, and the shapes of both the insulating structure 40 and the housing are adapted to the shape of the electrode group 30 to achieve higher energy density, when the insulating structure 40 is an open quadrangular prism, the quadrangular prism-shaped electrode group 30 is equivalent to being located within the internal space formed by the insulating structure 40, and the gap between the insulating structure 40 and the electrode group 30 is small. In this case, a liquid level detection component 20 needs to be further provided in the gap between the two. The space at the first edge 411 is larger than the space in other areas between the two, which can meet the accommodation requirements of the liquid level detection component 20. While providing a certain limiting effect on the liquid level detection component 20 to ensure detection reliability, it will not cause excessive compression between the electrode group 30 and the insulating structure 40.

[0046] In some embodiments, as Figure 1 , Figure 3 and Figure 4 As shown, the detection structure 21 includes two detection segments 211, and the two detection segments 211 are respectively covered by two liquid-absorbing material strips 22 at two corresponding first edges 411 on the same side 41. Further, the detection structure 21 also includes a transition segment 213, which connects the two detection segments 211. The transition segment 213 is used to realize the continuous transmission of optical signals in the two detection segments 211, that is, to input the optical signal output from one detection segment 211 into the other detection segment 211.

[0047] The arrangement of two detection segments 211 within the same detection structure 21 can be mutually calibrated through redundant design, eliminating interference from detection errors. For example, it will not cause false detections even under tilted conditions, thus improving detection reliability. Furthermore, corresponding to the number of detection segments 211, the liquid-absorbing material strips 22 in the same liquid level detection assembly 20 can also be arranged in segments (i.e., the liquid-absorbing material strip 22 includes individual strip structures). For example, the material of the liquid-absorbing material strip 22 includes at least one of polyurethane foam and cellulose sponge, or other high-porosity, hydrophilic materials can be used, provided that effective adsorption of electrolyte is achieved.

[0048] In some embodiments, the detection nodes 212 in different detection segments 211 are arranged in an aligned manner, or the detection nodes 212 in different detection segments 211 are arranged in an alternating manner. Compared to an aligned arrangement, an alternating arrangement of detection nodes 212 in different detection segments 211 can further increase the liquid level detection density and accuracy. At the same detection accuracy, the number of detection nodes 212 can be reduced compared to an aligned arrangement, thereby reducing the overall cost. An aligned arrangement, on the other hand, can improve detection reliability.

[0049] In some embodiments, as Figure 1 , Figure 3 and Figure 4As shown, the battery includes two liquid level detection components 20. The two liquid level detection components 20 are spaced apart in a second direction, which is perpendicular to the first direction Z. This second direction can be either the length direction X of the casing or the width direction Y of the casing. This effectively provides full coverage of the insulation structure 40 (electrode group 30 or casing) in all four directions, preventing localized missed or false liquid level detections and increasing the fault tolerance of the liquid level detection components 20. Even if one of the liquid level detection components 20 fails, relatively accurate liquid level detection can still be achieved.

[0050] Furthermore, such as Figure 3 As shown, the insulating structure 40 is an open cuboid shape, having two first side surfaces 41a (narrow surfaces) and two second side surfaces 41b (wide surfaces). The two first side surfaces 41a are arranged opposite each other in the length direction X of the housing, and the two second side surfaces 41b are arranged opposite each other in the width direction Y of the housing. Two detection segments 211 are respectively fixed at the two first edges 411 corresponding to one of the first side surfaces 41a, and a transition segment 213 is fixed at the second edge 412, which connects the two first edges 411. In this configuration, the two liquid level detection components 20 can be spaced apart in the length direction X of the housing. Since the transition segment 213 only serves as a signal transmission element, the above configuration allows for a relatively short transition segment 213, reducing the overall weight and cost of the liquid level detection components 20 and the battery without affecting the liquid level detection of the electrolyte 10.

[0051] In some embodiments, please refer to Figure 5 , Figure 5 A schematic diagram of the battery's disassembled structure is shown. The battery also includes a cover 50, which covers the housing and has a through hole 51 and a sealing structure 52. The detection structure 21 includes an input section 214 and an output section 215, with a detection section 211 connected between the input section 214 and the output section 215. If the same detection structure 21 includes two detection sections 211, the integrated structure formed by the two detection sections 211 is connected between the input section 214 and the output section 215. Both the input section 214 and the output section 215 pass through the through hole 51 to extend outside the housing. In this embodiment, the output of the liquid level detection component 20 can be based on the existing opening in the cover 50, achieving lossless signal transmission without requiring openings in other areas of the battery. This adapts to current battery production and assembly processes without increasing costs.

[0052] Furthermore, a sealing structure 52 is provided between the via 51 and the input section 214 and the output section 215. The sealing structure 52 is used to meet the battery's sealing requirements, preventing gas and electrolyte 10 generated during battery operation from leaking through the via 51, thus ensuring the battery's performance and reliability. For example, the sealing structure 52 can be a sealant, a sealing ring (e.g., an O-ring), or a waterproof membrane.

[0053] The battery in this embodiment, based on the liquid level detection component 20, can achieve accurate dynamic detection of the liquid level of the electrolyte 10 inside the battery, exhibiting high reliability and stability. The reliability and safety of the battery are improved. Furthermore, the overall battery structure is simple, compatible with existing battery production and assembly processes, and suitable for large-scale application.

[0054] This application also provides a battery module, including the battery described above.

[0055] The battery module of this application embodiment has improved reliability and safety because it includes the battery described above.

[0056] This application embodiment also provides an electrical system including the aforementioned battery module and battery management unit, with the battery management unit connected to the liquid level detection component. The battery management system controls and detects the operation of the battery module. The battery management unit includes an optical signal input module, an optical signal acquisition module, and a photoelectric conversion and analysis module. The optical signal input module inputs a raw optical signal to the detection structure. During transmission within the detection structure, the raw optical signal undergoes optical property changes, converting into a detection optical signal which is output to the detection structure. This signal is then received by the optical signal acquisition module and output to the photoelectric conversion and analysis module to generate a real-time curve for electrolyte level detection.

[0057] Furthermore, the battery management unit may also include an electrolyte warning module to issue a warning when the real-time curve indicates that the electrolyte level is close to or below the minimum safe level, so as to prompt the replacement of the battery module or battery, avoid sudden drop or failure of battery and battery module performance, and ensure the reliability of battery and battery module.

[0058] The electrical system of this application embodiment has improved reliability and safety because it includes the battery described above.

[0059] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A battery, characterized in that: The casing is filled with electrolyte; At least one liquid level detection component, including a detection structure and a liquid-absorbing material strip located within a housing; wherein, One end of the absorbent material strip is immersed in the electrolyte, and the other end of the absorbent material strip extends along a first direction to above the surface of the electrolyte, wherein the first direction is perpendicular to the surface of the electrolyte. The detection structure includes at least one detection segment, which is encapsulated within the liquid-absorbing material strip, and the detection segment includes at least one detection point based on the optical fiber surface plasmon resonance effect.

2. The battery according to claim 1, characterized in that: The detection segment includes multiple detection nodes arranged at intervals in a first direction.

3. The battery according to claim 2, characterized in that: The battery further includes an electrode assembly and an insulating structure, both of which are housed within the casing, with the insulating structure positioned between the electrode assembly and the inner wall of the casing; wherein, The absorbent material strip is disposed on the side of the insulating structure facing the electrode assembly.

4. The battery according to claim 3, characterized in that: The absorbent material strip is fixedly connected to the insulating structure.

5. The battery according to claim 4, characterized in that: The insulating structure is an open quadrangular prism with four side surfaces connected end to end. Two adjacent side surfaces share a first edge, and the extension direction of the first edge is parallel to the first direction. The absorbent material strip is fixed at one of the first edges.

6. The battery according to claim 5, characterized in that: The detection structure includes two detection segments, and the two detection segments are respectively wrapped within two absorbent material strips at two corresponding first edges on the same side; wherein, The detection nodes in different detection segments are arranged in an aligned manner, or the detection nodes in different detection segments are arranged in an alternating manner.

7. The battery according to claim 1, characterized in that: The battery includes two liquid level detection components, which are spaced apart in a second direction perpendicular to the first direction.

8. The battery according to claim 1, characterized in that: The battery also includes a cover, which is disposed on the housing, and the cover has a through hole and a sealing structure; wherein, The detection structure further includes an input section and an output section, with the detection section connected between the input section and the output section; both the input section and the output section pass through the through hole to extend outside the housing. Furthermore, a sealing structure is provided between the via and the input section and the output section.

9. A battery module, characterized in that: Includes the battery as described in any one of claims 1-8.

10. An electrical system, characterized in that, It includes a battery management unit and a battery module as described in claim 9, wherein the battery management unit is connected to the liquid level detection component.

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