CN217786408U - Damaged detection device of battery bottom backplate, battery protective structure and vehicle - Google Patents

Damaged detection device of battery bottom backplate, battery protective structure and vehicle Download PDF

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Publication number
CN217786408U
CN217786408U CN202221563992.5U CN202221563992U CN217786408U CN 217786408 U CN217786408 U CN 217786408U CN 202221563992 U CN202221563992 U CN 202221563992U CN 217786408 U CN217786408 U CN 217786408U
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Prior art keywords
battery
backplate
coil
sampling unit
magnetic core
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CN202221563992.5U
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Inventor
谭志佳
万龙
彭青波
杨胜琳
鲁鹏
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BYD Co Ltd
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BYD Co Ltd
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Priority to PCT/CN2023/101442 priority patent/WO2023246793A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/233—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions
    • H01M50/242—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by physical properties of casings or racks, e.g. dimensions adapted for protecting batteries against vibrations, collision impact or swelling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sustainable Energy (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Secondary Cells (AREA)

Abstract

The utility model discloses a damaged detection device of backplate at bottom of battery, battery protective structure and vehicle, the damaged detection device of battery bottom plate includes sampling unit, sampling unit includes magnetic core and coil, the magnetic core is suitable for to install at the backplate at the bottom of the battery and forms the magnetic field, the coil is suitable for to install in backplate at the bottom of the battery and be located in the magnetic field, when backplate at the bottom of the battery receives energy impact, the magnetic core takes place relative motion with the coil, the coil cuts the magnetic induction line in magnetic field in order to produce electric current; and the processing unit is connected with the coil and is used for detecting the current generated by the coil. According to the utility model discloses the impaired detection device of backplate at bottom of battery can accurately detect the atress condition of backplate at bottom of the battery, has advantages such as detect accurate nature height and simple structure.

Description

Damaged detection device of battery bottom backplate, battery protective structure and vehicle
Technical Field
The utility model belongs to the technical field of the vehicle technique and specifically relates to a damaged detection device of backplate, battery protective structure and vehicle at bottom of battery is related to.
Background
In the related art, a pressure sensor is usually arranged between a battery bottom protection plate and a battery pack to detect the stress condition of the battery bottom protection plate so as to judge whether the battery bottom protection plate is damaged or not and further judge the damage degree of collision to the battery pack.
However, the pressure sensor needs to be stressed and strained to detect the stress condition of the battery bottom guard plate, and when the stressed position of the battery bottom guard plate is far away from the pressure sensor, the pressure sensor may only vibrate along with the battery bottom guard plate and cannot accurately reflect the stress condition of the battery bottom guard plate, so that whether the battery bottom guard plate is damaged or not cannot be accurately detected.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the utility model is to provide an impaired detection device of backplate at the bottom of battery, the atress condition of backplate at the bottom of this impaired detection device of backplate at the bottom of battery can accurately detect the battery, has advantages such as detect accurate nature height and simple structure.
According to the utility model discloses still provide a battery protective structure who has the impaired detection device of above-mentioned bottom of battery backplate.
According to the utility model discloses a vehicle that has above-mentioned battery protective structure has still been provided.
In order to achieve the above object, according to a first aspect of the present invention, a device for detecting damage to a battery backplate is provided, including a sampling unit, the sampling unit includes a magnetic core and a coil, the magnetic core is suitable for being installed on the battery backplate and forming a magnetic field, the coil is suitable for being installed on the battery backplate and located in the magnetic field, when the battery backplate is impacted by energy, the magnetic core and the coil move relatively, and the coil cuts a magnetic induction line of the magnetic field to generate a current; and the processing unit is connected with the coil and is used for detecting the current generated by the coil.
According to the utility model discloses impaired detection device of backplate at bottom of battery can accurately detect the atress condition of backplate at bottom of the battery, has advantages such as detect accurate nature height and simple structure.
According to some embodiments of the invention, the mass of the magnetic core and the mass of the coil are different, so that both take place relative motion when the battery backplate receives the energy impact.
According to some embodiments of the present invention, the sampling unit further comprises: the magnetic core with the coil all movably install in the casing, the coil has stretch out the first lead-out wire and the second lead-out wire of casing, processing unit is located outside the casing and with first lead-out wire with the second lead-out wire links to each other.
According to some embodiments of the present invention, the sampling unit further comprises: the buffer piece is filled in the shell, and the magnetic core and the coil are movably arranged in the shell through the buffer piece.
According to some embodiments of the invention, the housing is a non-metallic piece.
According to the utility model discloses a second aspect embodiment provides a battery protection structure, include: a battery bottom guard plate; according to the utility model discloses a damaged detection device of backplate at bottom of battery of first aspect embodiment.
According to the utility model discloses a battery protection structure of second aspect embodiment, through utilizing according to the utility model discloses a backplate is impaired detection device at the bottom of the battery of first aspect embodiment can accurately detect the atress condition of backplate at the bottom of the battery, has advantages such as detect accurate nature height and simple structure.
According to the utility model discloses a some embodiments, the backplate is equipped with the mounting groove at the bottom of the battery, sampling unit detachably imbeds the mounting groove.
According to some embodiments of the invention, the battery backplate comprises: the buffer layer is provided with the sampling unit; first wearing layer and second wearing layer, first wearing layer with the second wearing layer branch is located the both sides of the thickness direction of buffer layer just cover the sampling unit.
According to some embodiments of the present invention, the sampling unit is integrated with the buffer layer.
According to some embodiments of the present invention, the sampling unit is a plurality of, the processing unit is connected to the coils of the sampling units or the processing unit is a plurality of connected to the coils of the sampling units respectively; the plurality of sampling units are arranged at intervals along the length direction of the battery bottom protection plate; and/or the plurality of sampling units are arranged at intervals along the width direction of the battery bottom protection plate.
According to the utility model discloses a some embodiments, the axial of coil is followed the thickness direction setting of protecting the board at the bottom of the battery.
According to the utility model discloses a third aspect embodiment provides a vehicle, includes: a vehicle body; a battery pack mounted to the vehicle body; according to the utility model discloses a battery protection structure of second aspect embodiment, battery backplate install in the automobile body with at least one in the battery package just is located the below of battery package.
According to the utility model discloses a vehicle of third aspect embodiment, through utilizing according to the utility model discloses a battery protection structure of second aspect embodiment can accurately detect the atress condition of backplate at the bottom of the battery, has advantages such as detect accurate nature height and simple structure.
According to the utility model discloses a some embodiments, the orientation of backplate at the bottom of the battery is located to the sampling unit one side of battery package.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a sampling unit according to an embodiment of the present invention.
Fig. 2 is an exploded view of a battery protection structure according to an embodiment of the present invention.
Fig. 3 is an exploded view of a battery protection structure according to another embodiment of the present invention.
Fig. 4 is a schematic diagram of arrangement of the sampling units on the battery protection structure according to the embodiment of the present invention.
Reference numerals:
a battery protection structure 1,
The sampling unit 100, the magnetic core 110, the coil 120, the first lead wire 121, the second lead wire 122, the case 130, the buffer 140, and the buffer,
The battery bottom protection plate 200, the mounting groove 210, the buffer layer 220, the first wear-resistant layer 230, and the second wear-resistant layer 240.
Detailed Description
Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
The following describes a damaged detection device of backplate under battery according to the embodiment of the present invention with reference to the attached drawings.
As shown in fig. 1-4, the device for detecting damage of battery backplate according to the embodiment of the present invention includes a sampling unit 100 and a processing unit (not shown).
The sampling unit 100 comprises a magnetic core 110 and a coil 120, the magnetic core 110 is suitable for being mounted on the battery bottom protection plate 200 and forming a magnetic field, the coil 120 is suitable for being mounted on the battery bottom protection plate 200 and located in the magnetic field, when the battery bottom protection plate 200 is impacted by energy, the magnetic core 110 and the coil 120 move relatively, the coil 120 cuts magnetic induction lines of the magnetic field to generate current, and a processing unit is connected with the coil 120 and used for detecting the current generated by the coil 120.
For example, the processing unit may be set with a preset current value, and when it is detected that the current generated by the coil 120 reaches the preset value, the processing unit may determine that the battery backplate 200 may be damaged, so as to ignore the micro-vibration generated when the vehicle runs on the ordinary ground. The coil 120 may be made of conductive metal such as copper wire or aluminum wire.
According to the utility model discloses impaired detection device of battery bottom plate, through installing magnetic core 110 in battery bottom backplate 200 and forming magnetic field, coil 120 is installed in battery bottom backplate 200 and is located the magnetic field, that is to say, magnetic core 110 and coil 120 are connected with backplate 200 at the bottom of the battery respectively, backplate 200 does not collide or the impact is less at the bottom of the battery, the vibration of backplate 200 at the bottom of the battery is less, coil 120 can keep relatively stable with backplate 200 at the bottom of the battery's relative position, and magnetic core 110 can keep relatively stable for backplate 200 at the bottom of the battery's relative position, the position relatively fixed of magnetic core 110 and coil 120 like this, the electric current that sampling unit 100 produced can be less or do not produce the electric current, the collision energy that backplate 200 at the bottom of the battery received is less can be ignored, sampling unit 100 has been avoided too sensitive to the vibration, guarantee the impaired detection accuracy of detection device of backplate at the bottom of the battery.
In addition, when the battery backplate 200 is impacted by energy, the magnetic core 110 and the coil 120 move relatively, the coil 120 cuts magnetic induction lines of a magnetic field to generate current, and the processing unit is connected with the coil 120 and is used for detecting the current generated by the coil 120, specifically, when the battery backplate 200 is impacted by energy, namely, is impacted, the battery backplate 200 vibrates, the magnetic core 110 moves relatively with the battery backplate 200 under the influence of the vibration of the battery backplate 200, the coil 120 also moves relatively with the battery backplate 200 under the influence of the vibration of the battery backplate 200, the moving speed of the coil 120 relative to the battery backplate 200 is different from the moving speed of the magnetic core 110 relative to the battery backplate 200, so that the magnetic core 110 and the coil 120 move relatively, and the magnetic core 110 reciprocates to generate eddy current.
And, the energy impact that backplate 200 received at the bottom of the battery is different, and the speed and the range that relative motion took place for magnetic core 110 and coil 120 are all different, and the energy impact that backplate 200 received at the bottom of the battery is big more, and the produced electric current of coil 120 is just also big more, and then can judge the size of the energy impact that backplate 200 received at the bottom of the battery through the electric current of processing unit detection coil 120, moreover, the utility model provides an in the embodiment of an impaired detection device of backplate need not extruded at the bottom of the battery, backplate 200 at the bottom of the battery's vibration almost all can transmit to the impaired detection device of backplate at the bottom of the battery, backplate 200 at the bottom of the battery's vibration amplitude can be judged the size of the energy impact that backplate 200 received at the bottom of the battery, and it is more accurate to detect.
Therefore, according to the utility model discloses the impaired detection device of backplate at bottom of battery can ignore the micro-vibration influence and accurately detect the atress condition of backplate at bottom of the battery, has advantages such as detect accurate nature height and simple structure.
In some embodiments of the present invention, the mass of the magnetic core 110 and the mass of the coil 120 are different, so that the two move relatively when the battery backplate 200 is impacted by energy.
For example, the mass of the magnetic core 110 is greater than that of the coil 120, the inertia of the magnetic core 110 is greater than that of the coil 120, and the coil 120 is less affected by the vibration of the battery backplate 200, that is, when the battery backplate 200 vibrates, the vibration frequency and the vibration amplitude of the coil 120 relative to the battery backplate 200 are both smaller, and the inertia of the magnetic core 110 is greater, and the vibration frequency and the vibration amplitude of the magnetic core 110 relative to the battery backplate 200 are both greater, so that the relative motion between the coil 120 and the magnetic core 110 occurs, and the greater the energy impact on the battery backplate 200, the greater the speed and the amplitude of the relative motion between the magnetic core 110 and the coil 120 are both greater, and the coil 120 can generate different currents according to the energy impact on the battery backplate 200.
In some embodiments of the present invention, as shown in fig. 1, the sampling unit 100 further comprises a housing 130,
the magnetic core 110 and the coil 120 are movably installed in the housing 130, the coil 120 has a first lead wire 121 and a second lead wire 122 protruding out of the housing 130, and the processing unit is located outside the housing 130 and connected to the first lead wire 121 and the second lead wire 122.
In this way, the housing 130 may be used to fix the core 110 and the coil 120, and avoid the core 110 and the coil 120 from interfering with other components, so as to protect the core 110 and the coil 120, and the core 110 and the coil 120 may move relative to the housing 130, so as to enable relative movement between the core 110 and the coil 120, and the coil 120 may cut a magnetic induction line of a magnetic field to generate a current.
Furthermore, the first lead wire 121 and the second lead wire 122 extend out of the housing 130, so that the processing unit and the coil 120 are electrically connected, the coil 120 forms a loop with the processing unit through the first lead wire 121 and the second lead wire 122, the current generated by the coil 120 can flow to the processing unit through the first lead wire 121 and the second lead wire 122, and the processing unit can judge the energy impact on the battery bottom protection plate 200 according to the current generated by the coil 120.
In some embodiments of the present invention, the housing 130 is a non-metal part, for example, the housing 130 can be a non-metal part such as ceramic or engineering plastic, the magnetic field of the magnetic core 110 for cutting the coil 120 is not affected by the housing 130 of the non-metal part, the accuracy of the detection of the energy impact received by the sampling unit 100 to the battery bottom guard plate 200 is further improved, and the measurement is more accurate.
It can be understood that, in some optional embodiments of the present invention, the housing 130 is a metal piece, for example, the housing 130 may be made of metal such as iron or aluminum, and the electromagnetic interference of the external magnetic field to the sampling unit 100 can be reduced by setting the housing 130 as the metal piece, so as to ensure the accuracy of the initial value of the current, or when the external electromagnetic interference is serious, the housing 130 is set as the metal piece to shield the electromagnetic interference of the external magnetic field to the sampling unit 100, so as to improve the detection accuracy of the sampling unit.
In some embodiments of the present invention, as shown in fig. 1, the sampling unit 100 further includes a buffer 140. The damping member 140 may be made of low-modal silica gel or EPDM (Ethylene Propylene Diene Monomer) or the like.
Specifically, the buffer member 140 is filled in the casing 130, and both the magnetic core 110 and the coil 120 are movably mounted to the casing 130 through the buffer member 140, so that the buffer member 140 can fix the coil 120 and the magnetic core 110, and can better transmit the vibration of the battery backplate 200 to the magnetic core 110 and the coil 120, and the buffer member 140 can deform, when the vibration capability of the battery backplate 200 is transmitted to the magnetic core 110 and the coil 120, the magnetic core 110 and the coil 120 can press the buffer member 140 to move, the buffer member 140 cannot completely block the movement of the magnetic core 110 and the coil 120, and the buffer member 140 has a large resistance to the coil 120, the amplitude of the vibration of the coil 120 relative to the battery backplate 200 is smaller, so that the magnetic core 110 and the coil 120 can perform relative movement, and the coil 120 can generate currents with different magnitudes according to the vibration energy of the battery backplate 200.
Moreover, the buffer member 140 can attenuate the vibration of the battery backplate 200, for example, when the vehicle is bumped during running and the battery backplate 200 is not collided, the vibration energy of the battery backplate 200 is attenuated by the buffer member 140, and then the energy transmitted to the magnetic core 110 and the coil 120 is reduced, so that the current generated by the sampling unit 100 is small, and the situation of false alarm is avoided.
The following describes the battery protection structure 1 according to the embodiment of the present invention with reference to the drawings, where the battery protection structure 1 includes the battery bottom protection plate 200 and the battery bottom protection plate damage detection device according to the embodiment of the present invention.
According to the utility model discloses battery protection architecture 1, through utilizing according to the utility model discloses the impaired detection device of backplate at the bottom of the battery of above-mentioned embodiment can ignore the micro-vibration influence and accurately detect the atress condition of backplate at the bottom of the battery, has advantages such as detect accurate nature height and simple structure.
In some embodiments of the present invention, as shown in fig. 2 and 3, the battery backplate 200 is provided with a mounting groove 210, and the sampling unit 100 is detachably inserted into the mounting groove 210. Like this, mounting groove 210 of backplate 200 at the bottom of the battery can carry out prepositioning to sampling unit 100, the assembly of sampling unit 100 of being convenient for, and make and be connected more reliably between backplate 200 at the bottom of sampling unit 100 and the battery, the vibration of backplate 200 at the bottom of the battery can transmit to sampling unit 100 better, has further improved the impaired detection accuracy of detection device of backplate at the bottom of the battery.
Moreover, the sampling unit 100 can be detachably mounted on the battery bottom protection plate 200 through the mounting groove 210, the battery bottom protection plate 200 can be detachably mounted on the battery pack, and the battery bottom protection plate 200 can be replaced independently without detaching and replacing the battery pack and the sampling unit 100, so that the cost is saved, and when the sampling unit 100 is mounted or the sampling unit 100 is maintained, the battery bottom protection plate 200 only needs to be detached independently, the battery pack does not need to be detached, and the operation is more convenient.
In some embodiments of the present invention, as shown in fig. 2 and 3, the battery backplate 200 includes a buffer layer 220, a first wear layer 230, and a second wear layer 240.
The sampling unit 100 is mounted on the buffer layer 220, and the first abrasion-resistant layer 230 and the second abrasion-resistant layer 240 are respectively disposed on two sides of the buffer layer 220 in the thickness direction and cover the sampling unit 100.
For example, can set up mounting groove 210 on buffer layer 220, install sampling unit 100 in buffer layer 220, first wearing layer 230 and second wearing layer 240 make up the back, can be through hot pressing composite integrated into one piece, thus, first wearing layer 230 and second wearing layer 240 can improve the structural strength of backplate 200 at the bottom of the battery, and then improve the protective effect of backplate 200 at the bottom of the battery to the battery package, first wearing layer 230 and second wearing layer 240 can protect buffer layer 220 and sampling unit 100 simultaneously, avoid sampling unit 100 to damage, further improve the detection precision of sampling unit 100.
Moreover, through setting up sampling unit 100 on buffer layer 220, buffer layer 220 plays certain cushioning effect, when the energy impact of backplate 200 at the bottom of the battery is less, buffer layer 220 can cushion the vibration of backplate 200 at the bottom of the battery, and then reduce the influence of small vibration to sampling unit 100, make the impaired detection device of backplate at the bottom of the battery can filter the small impact of backplate 200 at the bottom of the battery or the small vibration when the vehicle travels, avoided sampling unit 100 too sensitive, improve the impaired detection precision of detection device of backplate at the bottom of the battery further.
Further, as shown in fig. 2, the sampling unit 100 and the buffer layer 220 are integrally formed, so that the structures of the sampling unit 100 and the buffer layer 220 can be simplified, the assembly is convenient, the connection strength between the sampling unit 100 and the buffer layer 220 is higher, relative movement between the buffer layer 220 and the sampling unit 100 is not easy to occur, the buffering effect of the buffer layer 220 is better, and the detection accuracy of the device for detecting the damage of the battery bottom protective plate is improved.
In some embodiments of the present invention, as shown in fig. 2-4, the sampling units 100 are multiple, the processing unit is connected to the coils 120 of the sampling units 100, that is, one processing unit receives the electrical signals of the sampling units 100, so as to reduce the number of the components of the device for detecting the damage of the battery bottom protective plate, and the integration level of the processing unit is higher, which is convenient for arrangement. In addition, the detection of each region of the battery backplate 200 is more accurate, and the position of the battery backplate 200 that is impacted can be accurately positioned. In addition, the damage condition of the battery bottom protection plate 200 can be judged according to different currents of the sampling units 100, so that different processing can be conveniently carried out by the processing units, and the applicability is stronger.
In other embodiments of the present invention, the processing unit is a plurality of that link to each other with the coil 120 of a plurality of sampling units 100 respectively, that is, a plurality of processing units and a plurality of sampling units 100 one-to-one, and each processing unit is only responsible for receiving and processing the electric signal of a sampling unit 100, so that the mutual interference of the electric signals of a plurality of sampling units 100 can be avoided, the accuracy of the processing unit is higher, and the detection effect is more accurate.
Wherein, a plurality of sampling units 100 are arranged at intervals along the length direction of the battery bottom guard plate 200; and/or a plurality of sampling units 100 are arranged at intervals along the width direction of the backplate battery backplate 200. Thus, the plurality of sampling units 100 may be arranged in a plurality of rows and columns in the lengthwise and widthwise directions of the battery backplate 200.
It can be understood that when the current generated by the sampling unit 100 is large, one of the possibilities is that the battery backplate 200 is collided, and when the vehicle runs on a severe road condition, the vibration of the whole vehicle is large, and the vibration of the battery backplate 200 is also large, which further causes the current generated by the sampling unit 100 to be large, but at this time, the battery backplate 200 is not damaged seriously.
Therefore, when the vehicle vibrates, the vibration states of the single-row sampling unit 100 or the single-column sampling unit 100 are the same, and by arranging the plurality of sampling units 100 in this way, when the currents of the single-row sampling unit 100 or the single-column sampling unit 100 are all large, the processing unit can judge that the vehicle runs on a road with a bad road condition, and further cannot judge that the battery bottom protection plate 200 is damaged.
When the battery backplate 200 is damaged by collision, the current generated by the sampling units 100 is different due to the difference of collision areas, the current generated by the sampling units 100 in a single row of sampling units 100 is different from the current generated by the sampling units 100 in a single column of sampling units 100, and at this time, the processing unit detects that the current of some sampling units 100 is larger, and can judge that the corresponding part of the sampling unit 100 is damaged according to the current, so that the detection accuracy is higher.
In some embodiments of the present invention, as shown in fig. 2 to 4, the axial direction of the coil 120 is arranged along the thickness direction of the battery backplate 200.
For example, the magnetic core 110 may have a cylindrical shape, the coil 120 surrounds the magnetic core 110 along a circumferential direction of the magnetic core 110, and an axial direction of the magnetic core 110 is also disposed along a thickness direction of the battery backplate 200.
It can be understood that, the amplitude along the thickness direction of the battery backplate 200 can be larger when the battery backplate 200 vibrates, and the axial direction of the coil 120 and the axial direction of the magnetic core 110 are arranged along the thickness direction of the battery backplate 200, so that the vibration of the battery backplate 200 can be better transmitted to the coil 120, and then the coil 120 can vibrate along with the battery backplate 200, and meanwhile, the coil 120 and the magnetic core 110 can move relatively, which is beneficial to converting the energy impact on the battery backplate 200 into the current of the coil 120 more accurately, and further improves the detection accuracy of the device for detecting the damage of the battery backplate.
A vehicle according to an embodiment of the present invention is described below with reference to the drawings, the vehicle including a vehicle body, a battery pack, and a battery protection structure 1 according to the above-described embodiment of the present invention.
Specifically, the battery pack is mounted to the vehicle body, and the battery backplate 200 is mounted to at least one of the vehicle body and the battery pack and positioned below the battery pack. Like this, backplate 200 can protect the below of battery package at the bottom of the battery, avoids stone or the protruding direct below to the battery package in road surface to cause the damage, and backplate 200 can change alone at the bottom of the battery, need not dismantle the battery package when dismantling backplate 200 at the bottom of the battery, and the dismouting is more convenient.
According to the utility model discloses vehicle, through utilizing according to the utility model discloses battery protection structure 1 of above-mentioned embodiment can ignore the micro-vibration influence and accurately detect the atress condition of backplate at the bottom of the battery, has advantages such as detect accurate nature height and simple structure.
In some embodiments of the present invention, as shown in fig. 3, the sampling unit 100 is disposed on the side of the battery backplate 200 facing the battery pack.
Like this, the one side of backplate 200 at the bottom of the battery package of dorsad can shelter from sampling unit 100, and then protect sampling unit 100, avoid sampling unit 100 to damage, in order to guarantee sampling unit 100's detection precision, moreover, sampling unit 100 can expose in backplate 200 at the bottom of the battery one side towards the battery package, sampling unit 100 is changeed and is installed at the bottom of the battery on backplate 200 like this, and dismantle also simpler, the connection structure of backplate 200 at the bottom of further simplified sampling unit 100 and the battery.
Other configurations and operations of the battery backplate damage detection apparatus, the battery protection structure 1 and the vehicle according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A damaged detection device of backplate at bottom of battery, its characterized in that includes:
the sampling unit comprises a magnetic core and a coil, the magnetic core is suitable for being mounted on a battery bottom protection plate and forming a magnetic field, the coil is suitable for being mounted on the battery bottom protection plate and located in the magnetic field, when the battery bottom protection plate is impacted by energy, the magnetic core and the coil move relatively, and the coil cuts magnetic induction lines of the magnetic field to generate current;
and the processing unit is connected with the coil and is used for detecting the current generated by the coil.
2. The battery backplate damage detection apparatus of claim 1, wherein the mass of the magnetic core and the mass of the coil are different such that the two move relative to each other when the battery backplate is impacted by energy.
3. The battery backplate damage detection apparatus of claim 1, wherein the sampling unit further comprises:
the magnetic core with the coil all movably install in the casing, the coil has stretch out the first lead-out wire and the second lead-out wire of casing, processing unit is located outside the casing and with first lead-out wire with the second lead-out wire links to each other.
4. The battery backplate damage detection apparatus of claim 3, wherein the sampling unit further comprises:
the buffer piece is filled in the shell, and the magnetic core and the coil are movably arranged in the shell through the buffer piece.
5. The battery backplate damage detection apparatus of claim 3, wherein the housing is a non-metallic member.
6. A battery protection structure, comprising:
a battery bottom guard plate;
the battery backplate damage detection apparatus of any one of claims 1-5.
7. The battery protection structure according to claim 6, wherein the battery floor shield is provided with a mounting groove into which the sampling unit is detachably inserted.
8. The battery protection structure of claim 6, wherein said battery backplate comprises:
the buffer layer is provided with the sampling unit;
first wearing layer and second wearing layer, first wearing layer with the second wearing layer branch is located the both sides of the thickness direction of buffer layer just cover the sampling unit.
9. The battery protection structure of claim 8, wherein said sampling unit is integrally formed with said cushioning layer.
10. The battery protection structure according to claim 6, wherein the sampling unit is a plurality of sampling units, and the processing unit is connected to the coils of the sampling units or the processing unit is a plurality of sampling units respectively connected to the coils of the sampling units;
the plurality of sampling units are arranged at intervals along the length direction of the battery bottom protection plate; and/or
The plurality of sampling units are arranged at intervals along the width direction of the battery bottom protection plate.
11. The battery protection structure according to claim 6, wherein an axial direction of the coil is arranged in a thickness direction of the battery bottom guard.
12. A vehicle, characterized by comprising:
a vehicle body;
a battery pack mounted to the vehicle body;
the battery protection structure according to any one of claims 6-11, said battery floor shield being mounted to at least one of said vehicle body and said battery pack and located below said battery pack.
13. The vehicle of claim 12, wherein the sampling unit is disposed on a side of the battery backplate facing the battery pack.
CN202221563992.5U 2022-06-21 2022-06-21 Damaged detection device of battery bottom backplate, battery protective structure and vehicle Active CN217786408U (en)

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CN202221563992.5U CN217786408U (en) 2022-06-21 2022-06-21 Damaged detection device of battery bottom backplate, battery protective structure and vehicle
PCT/CN2023/101442 WO2023246793A1 (en) 2022-06-21 2023-06-20 Damage detection apparatus for battery bottom protection plate, battery protection structure, and vehicle

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CN217786408U (en) * 2022-06-21 2022-11-11 比亚迪股份有限公司 Damaged detection device of battery bottom backplate, battery protective structure and vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023246793A1 (en) * 2022-06-21 2023-12-28 比亚迪股份有限公司 Damage detection apparatus for battery bottom protection plate, battery protection structure, and vehicle

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