CN116315201A - Liquid sensor, battery pack and electric vehicle - Google Patents

Liquid sensor, battery pack and electric vehicle Download PDF

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Publication number
CN116315201A
CN116315201A CN202211584287.8A CN202211584287A CN116315201A CN 116315201 A CN116315201 A CN 116315201A CN 202211584287 A CN202211584287 A CN 202211584287A CN 116315201 A CN116315201 A CN 116315201A
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China
Prior art keywords
probe
liquid
spring
battery pack
connection
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Pending
Application number
CN202211584287.8A
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Chinese (zh)
Inventor
黄伟才
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Hubei Eve Power Co Ltd
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Hubei Eve Power Co Ltd
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Application filed by Hubei Eve Power Co Ltd filed Critical Hubei Eve Power Co Ltd
Priority to CN202211584287.8A priority Critical patent/CN116315201A/en
Publication of CN116315201A publication Critical patent/CN116315201A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/16—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using electric detection means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H01M10/635—Control systems based on ambient temperature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings

Abstract

The invention provides a liquid sensor, a battery pack and an electric vehicle, wherein the liquid sensor comprises a first probe, a second probe and a resistor, the first probe comprises a first probe and a first connecting end opposite to the first probe, and the second probe comprises a second probe and a second connecting end opposite to the second probe; the first connection end is configured to be electrically connected with a positive electrode of a power supply, the second connection end is configured to be electrically connected with a negative electrode of the power supply, and the first probe and the second probe are configured to be electrically connected with the same liquid; one end of the resistor is electrically connected with the first connecting end, and the other end of the resistor is electrically connected with the second connecting end.

Description

Liquid sensor, battery pack and electric vehicle
Technical Field
The invention relates to the technical field of new energy, in particular to a liquid sensor, a battery pack and an electric vehicle.
Background
Although the battery pack strictly executes waterproof requirements, the waterproof failure of the sealing ring of the box body or the liquid leakage phenomenon of the liquid cooling pipeline is difficult to avoid along with the increase of the use frequency and the increase of the placement time. Due to the fact that the battery pack in the related art lacks of an effective waterproof protection design, the hidden danger of waterproof failure of the battery pack can not be monitored in time, water inlet damage, liquid leakage damage and even short-circuit ignition and other risks of the battery pack are easily caused.
Disclosure of Invention
The embodiment of the invention provides a liquid sensor, a battery pack and an electric vehicle, which can detect the leakage problem of the battery pack in real time.
In a first aspect, embodiments of the present invention provide a liquid sensor including a first probe, a second probe, and a resistor,
the first probe comprises a first probe and a first connecting end opposite to the first probe, and the second probe comprises a second probe and a second connecting end opposite to the second probe; the first connection end is configured to be electrically connected with a positive electrode of a power supply, the second connection end is configured to be electrically connected with a negative electrode of the power supply, and the first probe and the second probe are configured to be electrically connected with the same liquid;
one end of the resistor is electrically connected with the first connecting end, and the other end of the resistor is electrically connected with the second connecting end.
In an embodiment, the liquid sensor further comprises a housing, a first spring and a second spring, wherein the first connecting end, the second connecting end, the first spring and the second spring are all positioned inside the housing, and the first probe and the second probe extend out of the housing;
one end of the first spring is fixedly connected relative to the shell, the other end of the first spring is connected with the first probe, one end of the second spring is fixedly connected relative to the shell, and the other end of the second spring is connected with the second probe; the first probe and the second probe are slidably coupled with respect to the housing.
In an embodiment, the liquid sensor further comprises a first connecting column, a second connecting column and a first pressing block which are positioned in the shell; the first briquetting with casing fixed connection, first briquetting includes first connecting hole and second connecting hole, first spliced pole link up first connecting hole and with first briquetting fixed connection, the second spliced pole link up the second connecting hole and with first briquetting fixed connection, the one end of first spring with first spliced pole fixed connection, the one end of second spring with second spliced pole fixed connection.
In an embodiment, the first connection post includes a first protrusion located at a middle position of the first connection post and protruding from a cylinder of the first connection post, the second connection post includes a second protrusion located at a middle position of the second connection post and protruding from a cylinder of the second connection post, the first probe includes a third protrusion located at a middle position of the first probe and protruding from a cylinder of the first probe, and the second probe includes a fourth protrusion located at a middle position of the second probe and protruding from a cylinder of the second probe;
the central line of the first spring, the central line of the first probe and the central line of the first connecting column are overlapped, one end of the first spring is connected with the first protruding part, and the other end of the first spring is connected with the third protruding part; the center line of the second spring, the center line of the second probe and the center line of the second connecting column coincide, one end of the second spring is connected with the second protruding part, and the other end of the second spring is connected with the fourth protruding part.
In an embodiment, the first probe includes a first slide aperture facing away from the first probe side, the second probe includes a second slide aperture facing away from the second probe side, the first connection post includes a first slide head adjacent to the first probe side, and the second connection post includes a second slide head adjacent to the second probe side;
the first slider is positioned in the first sliding hole, and the first connecting column is in sliding connection with the first probe; the second slider is located in the second sliding hole, and the second connecting column is in sliding connection with the second probe.
In an embodiment, the liquid sensor further comprises a first wire, a second press block, and a bolt;
the second pressing block is fixedly connected with the shell and is fixedly connected with the first pressing block through the bolt; the second pressing block comprises a third connecting hole and a fourth connecting hole, the first conducting wire penetrates through the third connecting hole and is connected with one end of the first connecting column and one end of the resistor, and the second conducting wire penetrates through the fourth connecting hole and is connected with the second connecting column and the other end of the resistor.
In an embodiment, in a first state, one of the first and second probes is configured to be in contact with the liquid and the other is configured to be spaced from the liquid, and in a second state, the first and second probes are configured to be in contact with the liquid simultaneously; or alternatively, the process may be performed,
in a first state, the first and second probes are configured to be spaced apart from the liquid, and in a second state, the first and second probes are configured to be in simultaneous contact with the liquid; or alternatively, the process may be performed,
in the first state and the second state, the first probe and the second probe are both configured to be in simultaneous contact with the liquid.
In a second aspect, embodiments of the present invention provide a battery pack including a case and a plurality of liquid sensors provided by embodiments of the present invention; the box comprises a bottom plate and a side wall connected with the floor, the bottom plate comprises an insulating layer positioned on the surface of the bottom plate, the liquid sensor is arranged on the inner side of the side wall, and a first probe and a second probe of the liquid sensor are respectively contacted with the insulating layer.
In an embodiment, the first probe and the second probe are respectively in elastic contact with the insulating layer.
In an embodiment, the battery pack further comprises a liquid pipeline, wherein the liquid pipeline is arranged on the inner side of the side wall; the liquid pipeline comprises a pipeline connector, and the liquid sensor is arranged close to the pipeline connector.
In an embodiment, the first probe and the second probe are in contact with the lowest point of the insulating layer in the gravity direction.
In an embodiment, the battery pack further comprises a liquid cooling plate, a sealing ring and a cover plate, wherein the liquid cooling plate is arranged in the box body, and the sealing ring is connected with the cover plate and the side wall.
In a third aspect, an embodiment of the present invention provides an electric vehicle, including a vehicle body, an engine, and a battery pack according to any one of the embodiments of the present invention, the engine and the battery pack being disposed inside the vehicle body, the battery pack providing electric power to the engine.
The embodiment of the invention has the beneficial effects that:
in the embodiment of the invention, the liquid sensor which comprises the resistor, the first probe and the second probe which are connected in parallel is arranged, the circuit in which the liquid sensor is positioned is monitored to work normally in real time by using the resistor, and the liquid is detected by using the large current generated when the first probe and the second probe are conducted by liquid, so that the liquid detection is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a liquid sensor provided by an embodiment of the present invention;
FIG. 2 is a schematic top view of a liquid sensor according to an embodiment of the present invention with a second pressure block removed;
FIG. 3 is a schematic exploded view of a liquid sensor provided by an embodiment of the present invention;
fig. 4 is a perspective view of a battery pack according to an embodiment of the present invention;
fig. 5 is an internal perspective view of a battery pack according to an embodiment of the present invention with a cover plate removed;
FIG. 6 is an enlarged schematic view of the area AA in FIG. 5;
fig. 7 is a schematic internal perspective view of a battery pack according to an embodiment of the present invention with a cover plate, a liquid cooling plate and a liquid pipe removed;
FIG. 8 is an enlarged schematic view of the BB region in FIG. 7;
fig. 9 is an electrical schematic diagram of an electric vehicle provided by an embodiment of the present invention.
The drawings are marked:
10. liquid sensor 111, first probe, 1111, first probe, 1112, third protrusion, 1113, first slide hole, 1114, first connection end, 112, second probe, 1121, second probe, 1122, fourth protrusion, 1123, second slide hole, 1124, second connection end, 121, first spring, 122, second spring, 131, first connection post, 1311, first protrusion, 1312, first slide head, 132, second connection post, 1321, second protrusion, 141, first wire, 142, second wire, 15, first press block, 151, first connection hole, 152, second connection hole, 16, second press block, 161, third connection hole, 162, fourth connection hole, 17, bolt, 18, resistor, 19, housing, 11, center line;
1. a battery pack; 20. the box body, 21, side walls, 22, a bottom plate, 221 and an insulating layer; 30. a cover plate; 40. the liquid pipeline 41, the pipeline connector 50, the liquid cooling plate 51, the serpentine liquid cooling plate 52 and the flat plate liquid cooling plate; 60. sealing ring
Positive electrode (+) of the power supply, negative electrode (-) of the power supply.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the invention. In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
Aiming at the problems of water inlet damage and liquid leakage damage of the conventional battery pack, the embodiment of the invention provides a liquid sensor, a battery pack and an electric vehicle.
In one embodiment, referring to fig. 1 to 3, a liquid sensor 10 provided in the present invention includes: a first probe 111, a second probe 112, and a resistor 18. The first probe 111 includes a first probe 1111 and a first connection end 1114 opposite the first probe, and the second probe 112 includes a second probe 1121 and a second connection end 1124 opposite the second probe 1121; the first connection 1114 is configured to electrically connect to a positive pole (+) of a power supply, the second connection 1124 is configured to electrically connect to a negative pole (-) of the power supply, and the first probe 1111 and the second probe 1121 are configured to electrically connect to the same fluid. Resistor 18 has one end electrically connected to first connection 1114 and the other end electrically connected to second connection 1124.
Referring to fig. 9, when the liquid sensor 10 according to the embodiment of the present invention is used for detecting liquid: when the first probe 1111 and the second probe 1121 do not contact the same liquid 107 at the same time, the circuit where the power supply and the resistor 18 are located is conducted, and continuous small current exists in the circuit, so that the circuit connected with the liquid sensor 10 is ensured to work normally; when the first probe 1111 and the second probe 1121 simultaneously contact the same liquid 107, the circuits in which the power source, the first probe 111, and the second probe 112 are located are turned on, and a large circuit is generated in the turned-on circuits, so that the presence of the liquid is detected.
In one embodiment, when there is no need to detect liquid, one of the first probe 1111 and the second probe 1121 is configured to be in contact with the liquid to be detected, and the other is configured to be out of contact with the liquid to be detected; when the liquid needs to be detected, the first probe 1111 and the second probe 1121 are simultaneously configured to be in contact with the liquid, so that the circuits of the power supply, the first probe 111 and the second probe 112 are turned on. In this way, one of the first probe 1111 and the second probe 1121 does not have to be placed in the liquid, reducing the problem of corrosion of the probe by the liquid. The functions of the liquid sensor provided in this embodiment may be implemented by using components such as a magnetic component or a clamping component and a corresponding method, which are well known in the art, and are not described herein.
In another embodiment, when no detection of liquid is required, both the first probe 1111 and the second probe 1121 are configured not to contact the liquid; when it is desired to detect a liquid, the first probe 1111 and the second probe 1121 are configured to be in contact with the liquid at the same time. In this way, the first probe 1111 and the second probe 1121 do not need to be placed in the liquid when the liquid does not need to be detected, reducing the problem of corrosion of both probes by the liquid.
In yet another embodiment, when it is desired to detect a liquid, the first probe 1111 and the second probe 1121 are configured to be in contact with the liquid at the same time; when it is not necessary to detect liquid, the first probe 1111 and the second probe 1121 are also configured to be in contact with liquid at the same time.
In a specific embodiment, the liquid sensor 10 further includes a housing 19, a first spring 121, and a second spring 122, where the first connection end 1114, the second connection end 1124, the first spring 121, and the second spring 122 are all located inside the housing 19, and the first probe 1111 and the second probe 1121 extend out of the housing 19; one end of the first spring 121 is fixedly connected with the housing 19, the other end is connected with the first probe 111, one end of the second spring 122 is fixedly connected with the housing 19, and the other end is connected with the second probe 112; the first probe 111 and the second probe 112 are slidably connected with respect to the housing 19.
The first spring 121 and the second spring 122 may be directly and fixedly connected to the housing 19, or may be relatively and fixedly connected to the housing 19 through other components, as shown in fig. 2 and 3. The first spring 121 and the first probe 111 may be in contact connection only, or may be further in fixed connection; similarly, the second spring 122 may be in contact with the second probe 112, or may be in fixed contact with the second probe. The connection between the first spring 121 and the first probe 111 is identical to the connection between the second spring 122 and the second probe 112.
In a specific embodiment, the liquid sensor 10 further comprises a first connection post 131, a second connection post 132, and a first pressure block 15 within the housing 19. The first pressure piece 15 is fixedly connected with the housing 19. The first pressing block 15 includes a first coupling hole 151 and a second coupling hole 152; the first connection post 131 penetrates the first connection hole 151 and is fixedly connected with the first pressing block 15, and the second connection post 132 penetrates the second connection hole 152 and is fixedly connected with the first pressing block 15. One end of the first spring 121 is fixedly connected with the first connecting column 131, so that the first spring is fixedly connected with the shell 19 through the first connecting column 131 and the first pressing block 15; one end of the second spring 122 is fixedly connected with the second connecting column 132, and thus is fixedly connected with the housing 19 through the second connecting column 132 and the first pressing block 15.
Specifically, the first connection column 131 includes a first protrusion 1311 located at a middle position of the first connection column 131 and protruding from a column body of the first connection column 131, the first protrusion 1311 being in contact with the first pressing block 15; the second connection post 132 includes a second protrusion 1321 located at a middle position of the second connection post 132 and protruding from a cylinder of the second connection post 132, and the second protrusion 1321 is in contact with the first pressing block 15. The first probe 111 includes a third protrusion 1112 located at an intermediate position of the first probe 111 and protruding from a column of the first probe 111; the center line of the first spring 121, the center line of the first probe 111, and the center line of the first connection post 131 coincide, and one end of the first spring 121 is connected to the first protrusion 1311 and the other end is connected to the third protrusion 1112. The second probe 112 includes a fourth protruding portion 1122 located at a middle position of the second probe 112 and protruding from a column of the second probe 112; the center line of the second spring 122, the center line of the second probe 112, and the center line of the second connection post 132 overlap, and one end of the second spring 122 is connected to the second protruding portion 1321, and the other end is connected to the fourth protruding portion 1122.
Wherein the first spring 121 may be in contact with the first and third protrusions 1311 and 1112, respectively; the first spring 121 may be in contact with one of the first and third protrusions 1311 and 1112, and the other may be fixedly connected thereto; the first spring 121 may also be fixedly coupled to the first and third protrusions 1311 and 1112, respectively. The second spring 122 is connected in a consistent manner with the first spring.
In a specific embodiment, the first probe 111 further includes a first slide hole 1113 on a side facing away from the first probe 1111, the second probe 112 further includes a second slide hole 1123 on a side facing away from the second probe 1121, the first connection post 131 further includes a first slide head 1312 on a side near the first probe 111, and the second connection post 132 further includes a second slide head on a side near the second probe 121. The first slider 1312 is located in the first slide hole 1113 and is slidable in the first slide hole 1113, so that the first connection post 131 is slidably connected with the first probe 111; the second slider 1322 is positioned in the second slide hole 1123 and is slidable in the second slide hole 1123, thereby slidably connecting the second connection post 132 with the second probe 112.
In other embodiments, the first probe 111 is connected to the first connection post 131 through the first spring 121, and the second probe 112 is connected to the second connection post 132 through the second spring 122.
In a specific embodiment, the liquid sensor 10 further includes a first wire 141, a second wire 142, a second press 16, and a bolt 17. The second press block 16 is fixedly connected with the housing 19, and the second press block 16 is fixedly connected with the first press block 15 through a bolt 17. The second pressing block 16 includes a third connection hole 161 and a fourth connection hole 162, the first wire 141 penetrates the third connection hole 161 and is connected to one end of the first connection post 131 and one end of the resistor 18, and the second wire 142 penetrates the fourth connection hole 162 and is connected to the second connection post 132 and the other end of the resistor 18. Wherein the first wire 141 is configured to be electrically connected to a positive electrode (+) of the power supply, and the second wire 142 is configured to be electrically connected to a negative electrode (-) of the power supply.
The box body and the cover plate of the battery pack are sealed by a sealing ring, and after the battery pack is used for a long time, the sealing ring can age, so that the problem of waterproof failure occurs; in addition, the liquid pipeline in the battery pack is provided with a pipeline joint, and after long-term use, the risk of liquid leakage can also occur. In view of the above, the embodiment of the present invention accordingly provides a battery pack 1 to solve the above problems.
Referring to fig. 4 to 8, a battery pack 1 includes a case 20 and a plurality of liquid sensors 10 according to any one of the embodiments of the present invention. The case 20 includes a bottom plate 22 and a sidewall 21 connected to the bottom plate 22, the bottom plate 22 including an insulating layer 221 on a surface of the bottom plate 22; the liquid sensor 10 is provided inside the side wall 21, and the first probe 111 and the second probe 112 of the liquid sensor 10 are respectively in contact with the insulating layer 221, specifically, the first probe 1111 and the second probe 1121 are respectively in contact with the insulating layer 221.
It should be noted that, the surfaces of the bottom plate 22 contacting the first probe 1111 and the second probe 1121 must be sprayed with an insulating layer to ensure good insulation between the first probe 111 and the second probe 112 and the bottom plate 22, so as to avoid false detection.
According to the embodiment of the invention, the liquid sensor is additionally arranged in the battery pack, so that the battery pack can detect whether a liquid pipeline leaks or whether the sealing ring of the battery pack fails in a waterproof manner, and the problems of water soaking damage or short circuit fire occurrence of the battery pack are avoided.
Further, the presence of the first spring 121 and the second spring 122 inside the liquid sensor 10 makes the first probe 1111, the second probe 1121 elastically contact with the insulating layer 221, respectively. In this way, the contact effect of the first probe 1111 and the second probe 1121 with the surface of the bottom plate 22 is improved, and the problem that the first probe 1111 or the second probe 1121 cannot contact with the insulating layer due to the uneven phenomenon of the battery pack 1, so that the liquid sensor 10 cannot detect the liquid in the battery pack 1 is avoided.
In a specific embodiment, the battery pack 1 further includes a liquid pipe 40, a liquid cooling plate 50, a sealing ring 60, and a cover plate 30, where the liquid cooling plate 50 and the liquid pipe 40 are disposed in the box 20, and the sealing ring 60 connects the cover plate 30 and the side wall 21. Wherein the liquid management 40 specifically includes liquid cooling management; the liquid cooling plate 50 includes a serpentine liquid cooling plate 51 and a flat liquid cooling plate 52.
In one embodiment, the liquid pipeline 40 is disposed on the inner side of the sidewall 21, the liquid pipeline 40 includes a pipeline connector 41, and the liquid sensor 10 is disposed near the pipeline connector 41. In this way, the corresponding liquid sensor 10 is arranged at the position where the liquid pipeline 40 is most likely to leak, so that the accuracy and timeliness of the detection of the leakage of the battery pack 1 are improved.
In one embodiment, the first probe 111 and the second probe 112 are in contact with the lowest point of the insulating layer 221 in the gravity direction. Thus, when the liquid leakage occurs in the liquid pipe 40 or the waterproof failure of the gasket 60 occurs in the battery pack 1, the liquid flows to the lowest point of the battery pack 1 in the gravitational direction to contact the first probe 1111 and the second probe 1121. The accuracy of battery pack leakage detection and waterproof failure detection is further improved.
Correspondingly, the embodiment of the invention also provides an electric vehicle, which comprises a vehicle body, an engine and the battery pack according to any one of the embodiments of the invention, wherein the engine and the battery pack are arranged in the vehicle body, and the battery pack provides electric power for the engine.
Referring to fig. 9, when the battery pack 1 is leaking liquid into the water or failing to be water, the first probe 111 and the second probe 112 of the liquid sensor are in contact with the liquid 107 and are turned on, the loop where the first probe 111 and the second probe 112 are located generates larger current, and after the battery management system 101 detects the larger current, on the one hand, an alarm prompt is displayed on the on-board operation interface 102 to prompt a driver, and on the other hand, the control relay 103 is turned off to stop the battery pack 1 from being electrified, so as to avoid the occurrence of short circuit and fire of the modules 104/105/106, and protect the safety of the battery pack, the vehicle using the battery pack and personnel on the vehicle.
In summary, the embodiment of the invention provides a liquid sensor, a battery pack and an electric vehicle, wherein the liquid sensor comprises a resistor, a first probe and a second probe which are connected in parallel, a circuit in which the liquid sensor is positioned is monitored to work normally in real time by using the resistor, and liquid is detected by using large current generated when the first probe and the second probe are conducted by liquid, so that liquid detection is realized. The liquid sensor is arranged in the battery pack, and the insulating layer on the surface of the bottom plate of the battery pack is contacted with the liquid sensor, so that the battery pack can detect liquid leakage of a liquid pipeline and waterproof failure of a sealing ring in real time, the problem that the battery pack is damaged by soaking water or is short-circuited and fire is avoided, and the safety of the battery pack, a vehicle using the battery pack and personnel on the vehicle is protected.
The foregoing has outlined rather broadly the more detailed description of embodiments of the invention, wherein the principles and embodiments of the invention are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present invention, the present description should not be construed as limiting the present invention.

Claims (13)

1. A liquid sensor is characterized by comprising a first probe, a second probe and a resistor,
the first probe comprises a first probe and a first connecting end opposite to the first probe, and the second probe comprises a second probe and a second connecting end opposite to the second probe; the first connection end is configured to be electrically connected with a positive electrode of a power supply, the second connection end is configured to be electrically connected with a negative electrode of the power supply, and the first probe and the second probe are configured to be electrically connected with the same liquid;
one end of the resistor is electrically connected with the first connecting end, and the other end of the resistor is electrically connected with the second connecting end.
2. The liquid sensor of claim 1, further comprising a housing, a first spring and a second spring, wherein the first connection end, the second connection end, the first spring and the second spring are all located inside the housing, and wherein the first probe and the second probe extend out of the housing;
one end of the first spring is fixedly connected relative to the shell, the other end of the first spring is connected with the first probe, one end of the second spring is fixedly connected relative to the shell, and the other end of the second spring is connected with the second probe; the first probe and the second probe are slidably coupled with respect to the housing.
3. The liquid sensor of claim 2, further comprising a first connection post, a second connection post, a first pressure block within the housing; the first briquetting with casing fixed connection, first briquetting includes first connecting hole and second connecting hole, first spliced pole link up first connecting hole and with first briquetting fixed connection, the second spliced pole link up the second connecting hole and with first briquetting fixed connection, the one end of first spring with first spliced pole fixed connection, the one end of second spring with second spliced pole fixed connection.
4. A liquid sensor according to claim 3, wherein the first connection post comprises a first protrusion located at a middle position of the first connection post and protruding from a column of the first connection post, the second connection post comprises a second protrusion located at a middle position of the second connection post and protruding from a column of the second connection post, the first probe comprises a third protrusion located at a middle position of the first probe and protruding from a column of the first probe, and the second probe comprises a fourth protrusion located at a middle position of the second probe and protruding from a column of the second probe;
the central line of the first spring, the central line of the first probe and the central line of the first connecting column are overlapped, one end of the first spring is connected with the first protruding part, and the other end of the first spring is connected with the third protruding part; the center line of the second spring, the center line of the second probe and the center line of the second connecting column coincide, one end of the second spring is connected with the second protruding part, and the other end of the second spring is connected with the fourth protruding part.
5. The liquid sensor of claim 4, wherein the first probe includes a first slide aperture facing away from the first probe side, the second probe includes a second slide aperture facing away from the second probe side, the first connection post includes a first slide head adjacent to the first probe side, and the second connection post includes a second slide head adjacent to the second probe side;
the first slider is positioned in the first sliding hole, and the first connecting column is in sliding connection with the first probe; the second slider is located in the second sliding hole, and the second connecting column is in sliding connection with the second probe.
6. The liquid sensor of any one of claims 3 to 5, further comprising a first wire, a second press block, and a bolt;
the second pressing block is fixedly connected with the shell and is fixedly connected with the first pressing block through the bolt; the second pressing block comprises a third connecting hole and a fourth connecting hole, the first conducting wire penetrates through the third connecting hole and is connected with one end of the first connecting column and one end of the resistor, and the second conducting wire penetrates through the fourth connecting hole and is connected with the second connecting column and the other end of the resistor.
7. The liquid sensor of claim 1, wherein in a first state one of the first probe and the second probe is configured to be in contact with the liquid and the other is configured to be spaced apart from the liquid, and in a second state the first probe and the second probe are configured to be in contact with the liquid simultaneously; or alternatively, the process may be performed,
in a first state, the first and second probes are configured to be spaced apart from the liquid, and in a second state, the first and second probes are configured to be in simultaneous contact with the liquid; or alternatively, the process may be performed,
in the first state and the second state, the first probe and the second probe are both configured to be in simultaneous contact with the liquid.
8. A battery pack comprising a case and a plurality of liquid sensors as claimed in any one of claims 1 to 7; the box comprises a bottom plate and a side wall connected with the floor, the bottom plate comprises an insulating layer positioned on the surface of the bottom plate, the liquid sensor is arranged on the inner side of the side wall, and a first probe and a second probe of the liquid sensor are respectively contacted with the insulating layer.
9. The battery pack of claim 8, wherein the first probe and the second probe are each in elastic contact with the insulating layer.
10. The battery pack of claim 9, further comprising a liquid conduit disposed inside the sidewall; the liquid pipeline comprises a pipeline connector, and the liquid sensor is arranged close to the pipeline connector.
11. The battery pack of claim 9 or 10, wherein the first probe and the second probe are in contact with the lowest point of the insulating layer in the gravity direction.
12. The battery pack of claim 11, further comprising a liquid cooling plate, a sealing ring and a cover plate, wherein the liquid cooling plate is disposed inside the case, and wherein the sealing ring connects the cover plate and the side wall.
13. An electric vehicle comprising a vehicle body, an engine, and a battery pack according to any one of claims 8 to 12, the engine and the battery pack being disposed inside the vehicle body, the battery pack providing electric power to the engine.
CN202211584287.8A 2022-12-09 2022-12-09 Liquid sensor, battery pack and electric vehicle Pending CN116315201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211584287.8A CN116315201A (en) 2022-12-09 2022-12-09 Liquid sensor, battery pack and electric vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211584287.8A CN116315201A (en) 2022-12-09 2022-12-09 Liquid sensor, battery pack and electric vehicle

Publications (1)

Publication Number Publication Date
CN116315201A true CN116315201A (en) 2023-06-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211584287.8A Pending CN116315201A (en) 2022-12-09 2022-12-09 Liquid sensor, battery pack and electric vehicle

Country Status (1)

Country Link
CN (1) CN116315201A (en)

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