CN115133192A - Battery system capable of resisting external impact and protection method - Google Patents
Battery system capable of resisting external impact and protection method Download PDFInfo
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- CN115133192A CN115133192A CN202210649215.0A CN202210649215A CN115133192A CN 115133192 A CN115133192 A CN 115133192A CN 202210649215 A CN202210649215 A CN 202210649215A CN 115133192 A CN115133192 A CN 115133192A
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- 230000008439 repair process Effects 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
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- 238000004804 winding Methods 0.000 claims description 6
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- 238000006073 displacement reaction Methods 0.000 claims description 3
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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
- 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
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
-
- 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
- H01M50/24—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 from their environment, e.g. from corrosion
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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
- 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
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- 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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery system capable of resisting external impact and a protection method, wherein the battery system comprises a lower box body assembly, a mounting plate, a battery pack and a control device; a repairing layer is filled in a sealing cavity formed by surrounding the bottom plate of the lower box body and used for repairing cracks generated on the surface of the bottom plate; the mounting plate body is provided with a position abutting against the bottom plate and a position separating from the bottom plate, and the wire-shaped conducting wire is arranged on the bottom surface of the mounting plate body; the battery pack consists of a plurality of battery cells and is connected with the mounting plate; the control device comprises a monitoring unit, a control unit and an execution unit, wherein the monitoring unit is used for detecting the on-off state of the filiform lead, and when the filiform lead is disconnected, the execution unit drives the mounting plate to move from the abutting position with the bottom plate to the separating position; the self-repairing device can perform self-repairing when cracks appear at the bottom of the battery box, avoid accidental water inflow, avoid the damage of the battery due to external force impact and the thermal runaway accident caused by the damage of the battery, and improve the driving safety.
Description
Technical Field
The invention relates to the technical field of vehicle batteries, in particular to a battery system capable of resisting external impact and a protection method.
Background
The power battery system is arranged at the bottom of the whole vehicle and needs to bear external impact and scratch, when the bottom impact is too large, the shell of the battery system is easy to break, so that the internal battery core is damaged, and a thermal runaway safety accident is caused. The conventional scheme for solving the problem is to add a metal guard plate below the battery system to increase the impact resistance, but the metal guard plate has heavy weight, which increases the weight of the whole vehicle to reduce the driving range of the vehicle, so that the problem needs to be solved.
Aiming at different external impact conditions, if different countermeasures can be taken, the reliability of the system is improved, and meanwhile, the cost increase caused by excessive protection can be avoided.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The present invention is directed to a battery system and a protection method capable of resisting external impact, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a battery system that is resistant to external impacts, comprising:
the lower box body assembly comprises a frame, a bottom plate and a repairing layer; the frame is connected with the bottom plate, the bottom plate is surrounded to form a sealed cavity, the repairing layer is arranged in the sealed cavity, and the repairing layer is used for repairing cracks generated on the surface of the bottom plate;
the mounting plate comprises a mounting plate body and a wire-shaped wire, the mounting plate body is arranged opposite to the bottom plate, the mounting plate body is provided with a butt joint position mutually abutted against the bottom plate and a separation position separated from the bottom plate, and the wire-shaped wire is arranged on the bottom surface of the mounting plate body close to the bottom plate direction;
the battery pack consists of a plurality of battery cells and is fixedly connected with the upper part of the mounting plate;
the control device comprises a monitoring unit, a control unit and an execution unit; the monitoring unit is respectively connected with the filamentous lead and the control unit, and the control unit is connected with the execution unit; the monitoring unit is used for detecting the on-off state of the filiform wire, and when the filiform wire is disconnected, the execution unit drives the mounting plate to move from the abutting position to the separating position.
Further, the base plate includes: the bottom plate comprises a bottom plate upper layer, a bottom plate middle layer and a bottom plate lower layer, the bottom plate upper layer is connected with the bottom plate middle layer in a sealing mode, and the bottom plate middle layer is connected with the bottom plate lower layer in a sealing mode; the middle layer of the bottom plate divides the sealing cavity into a plurality of accommodating cavities, the accommodating cavities are communicated with each other, and the accommodating cavities are used for accommodating the repairing layer; the upper layer is provided with an injection port, and the repairing layer is injected into the accommodating cavity through the injection port.
Further, the repairing layer comprises an adhesive and fiber particles, wherein the fiber particles are suspended in the adhesive, and the adhesive is a liquid with the viscosity of less than 30000mpa.s at the temperature of-40 ℃ to 100 ℃.
Furthermore, the edge of the mounting plate body is provided with a protrusion, the inner side of the frame is provided with a groove, the protrusion and the groove are correspondingly arranged, the protrusion can move up and down along the groove, and the mounting plate body is fixedly connected with the bottom plate through magnetic force.
Further, the protrusion is a permanent magnet, the outline of the protrusion is isosceles trapezoid, the outline of the groove is isosceles trapezoid and is correspondingly arranged with the groove, and the isosceles trapezoid and the groove are used for restraining the transverse and longitudinal displacement of the mounting plate body.
Furthermore, the execution unit is an electromagnet consisting of a steel plate and a coil; the execution unit is arranged at the bottom of the groove, when the mounting plate body is subjected to gravity and the magnetic force of the bulge per se and the execution unit are mutually attracted, the mounting plate body and the bottom plate are in the abutting position, the execution unit is abutted to the bulge, and the bottom plate is fixedly connected with the mounting plate through magnetic force.
Further, the steel plate is magnetized when energized, and the polarity is set to be opposite to the polarity of the protrusions, driving the mounting plate upward to the separated position under the force of the repulsive electromagnetic force.
Further, the battery cell comprises a shell, a buffer layer and a winding core; the buffer layer is arranged between the winding core and the shell.
In another aspect, there is provided a protection method against external impact, including any one of the above battery systems against external impact, including:
the bottom plate of the lower box body assembly is impacted by external force;
the bottom plate repairs cracks generated by the bottom plate through the repair layer;
an external force impacts the mounting plate through the bottom plate;
the filamentous lead is broken by external force impact, the control device is triggered, the mounting plate is driven to move upwards along the groove to the separation position, and the battery pack is prevented from being impacted;
an external force impacts the battery pack through the mounting plate;
the buffer layer absorbs impact force generated by external impact.
Further, the filiform wire is broken by external force impact, triggers the control device, drives the mounting plate along the recess upward movement to the separation position, makes the group battery avoid assaulting, includes:
when the filamentous lead is broken by external force impact, the monitoring unit outputs a protection signal to the control unit;
the protection signal is used for instructing the control unit to send a protection action instruction to the execution unit;
the protection action instruction is used for instructing the execution unit to execute a protection action;
the protection action is used for indicating the execution unit to be powered on;
the execution unit generates electromagnetic force after being electrified, and the electromagnetic force and the bulge magnetically repel each other, so that the mounting plate is driven to move upwards along the groove to the separation position.
Compared with the prior art, the invention has the beneficial effects that: the invention can carry out self-repair when cracks appear at the bottom of the battery box, avoids accidental water inflow, adopts different counter measures to carry out protection according to different external impact conditions, avoids the damage of the battery caused by external force impact and thermal runaway accidents caused by the damage of the battery, and improves the driving safety.
Drawings
Fig. 1 is an exploded view illustrating a structure of a battery system resistant to external impacts according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structural connection of the lower case assembly, the mounting plate and the battery pack according to the embodiment of the present invention;
fig. 3 is an exploded view of a cell structure in an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating the structural connection of a control device according to an embodiment of the present invention;
FIG. 5 is a flow chart of a protection method against external impact;
FIG. 6 is a flow chart of a method of controlling the device to drive the mounting plate and the battery pack to move;
in the figure: 100. mounting a plate; 200. a lower box assembly; 300. a battery pack; 400. a control device; 110. a mounting plate body; 120. a wire-like lead; 210. a frame; 220. a base plate; 230. a repair layer; 310. an electric core; 410. a monitoring unit; 420. a control unit; 430. an execution unit; 221. a bottom plate upper layer; 222. a middle layer of the bottom plate; 223. a bottom plate lower layer; 224. an injection port; 111. a protrusion; 211. a groove; 311. a housing; 312. a buffer layer; 313. and (6) winding cores.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Referring to the attached drawings of the specification, the invention provides a technical scheme that: a battery system that is resistant to external impacts, comprising:
the lower box assembly 200, wherein the lower box assembly 200 comprises a frame 210, a bottom plate 220 and a repairing layer 230; the frame 210 is connected with the base plate 220, the base plate 220 is surrounded to form a sealed cavity, the repairing layer 230 is arranged in the sealed cavity, and the repairing layer 230 is used for repairing cracks generated on the surface of the base plate;
a mounting plate 100 including a mounting plate body 110 and a wire-like wire 120, the mounting plate body 110 being disposed opposite to the bottom plate 220, the mounting plate body 110 having an abutting position abutting against the bottom plate 220 and a separated position separated from the bottom plate 220, the wire-like wire 120 being disposed on a bottom surface of the mounting plate body 110 in a direction toward the bottom plate 220;
the battery pack 300 is composed of a plurality of battery cells 310, and the battery pack 300 is fixedly connected with the upper part of the mounting plate 100;
a control device 400, the control device 400 comprising a monitoring unit 410, a control unit 420 and an execution unit 430; the monitoring unit 410 is respectively connected with the filamentous lead 120 and the control unit 420, and the control unit 420 is connected with the execution unit 430; the monitoring unit 410 is used for detecting the on-off state of the wire-shaped conductor 120, and when the wire-shaped conductor 120 is disconnected, the execution unit 430 drives the mounting plate 100 to move from the abutting position with the bottom plate 220 to the separating position.
In the above embodiment, the wire-shaped wires 120 are densely distributed on one side of the mounting plate body 110 away from the mounting surface of the battery pack 300, two ends of the wire-shaped wires 120 are connected with the monitoring unit 410 of the control device 400 through the connector, and the monitoring unit 410 judges whether the battery pack mounting plate is subjected to external impact through the connection and disconnection of the wire-shaped wires; when the bottom plate 220 has cracks, the repair layer 230 fills the cracks, so that the sealing function of the lower box body assembly is ensured to be complete; the monitoring unit 410 is used for monitoring whether the battery system is impacted by a foreign object and feeding back information to the control unit 420, after the control unit 420 receives the information that the battery system is impacted by the foreign object, the execution unit 430 is started, and the execution unit 430 moves the battery pack upwards to be away from the foreign object, so that the effect of avoiding the impact of the foreign object is achieved; the bottom plate 220 is preferably an extruded aluminum profile, and the bottom plate with the middle communicating cavity is manufactured in a mode of sealing and welding two ends, or the bottom plate with the middle communicating cavity can be manufactured in a mode of casting and welding.
Optionally, the bottom plate 220 includes: the bottom plate 220 comprises a bottom plate upper layer 221, a bottom plate middle layer 222 and a bottom plate lower layer 223, wherein the bottom plate upper layer 221 is hermetically connected with the bottom plate middle layer 222, and the bottom plate middle layer 222 is hermetically connected with the bottom plate lower layer 223; the bottom plate middle layer 222 divides the sealed cavity into a plurality of accommodating cavities which are communicated with each other and used for accommodating the repairing layer 230; the upper layer 221 is provided with an injection port 224, and the repair layer 230 is injected into the accommodation cavity through the injection port 224.
In the above embodiment, the sealed cavity is preferably vacuumized, and the negative pressure is automatically injected into the repair layer 230 to ensure complete filling.
Optionally, the repairing layer 230 includes an adhesive and fiber particles suspended in the adhesive, wherein the adhesive is a liquid with a viscosity of less than 30000mpa.s at a temperature of-40 ℃ to 100 ℃.
Optionally, the edge of the mounting plate body 110 has a protrusion 111, the inner side of the frame 210 has a groove 211, the protrusion 111 is disposed corresponding to the groove 211, the protrusion 111 can move up and down along the groove 211, and the mounting plate body 110 and the bottom plate 220 are fixed by magnetic force.
Optionally, the protrusion 111 is a permanent magnet, the profile of the protrusion 111 is an isosceles trapezoid, and the profile of the groove 211 is an isosceles trapezoid and is arranged corresponding to the groove 211, so as to constrain the lateral and longitudinal displacements of the mounting plate body 110.
In the above embodiment, the contour of the groove 211 and the protrusion 111 have a mounting gap of 2mm to 5mm when being assembled, so that the battery pack 300 and the battery pack mounting plate 100 can be conveniently assembled into a box, and the mounting efficiency and the replacement efficiency can be improved.
Optionally, the execution unit 430 is an electromagnet composed of a steel plate and a coil; the execution unit 430 is disposed at the bottom of the groove 211, when the mounting plate body 110 is subjected to gravity and the magnetic force of the protrusion 111 attracts the execution unit 430, the mounting plate body 110 and the bottom plate 220 are in the abutting position, the execution unit 430 abuts against the protrusion 111, and the bottom plate 220 and the mounting plate 100 are fixedly connected through magnetic force.
Alternatively, the steel plate is magnetized when energized, and the polarity is set to be opposite to that of the protrusions 111, driving the mounting plate 100 upward to the separated position under the force of the repulsive electromagnetic force.
In the above embodiment, the monitoring unit 410 identifies whether the battery system is impacted by a foreign object through the on-off state of the filamentous conductor 120, when the foreign object breaks through the bottom plate of the box body and extrudes the filamentous conductor at the bottom of the battery pack mounting plate, the wire is broken, and at this time, the circuit is in the off state, the monitoring unit 410 determines that the battery system is impacted by the external object, and transmits a signal to the control unit 420. After receiving the signal, the control unit 420 controls the operation of the execution unit 430 to push the mounting plate 110 upward, so that the battery pack 300 on the mounting plate 110 is away from the foreign object and is prevented from being impacted.
Optionally, the battery cell 310 includes a casing 311, a buffer layer 312, and a winding core 313; the buffer layer 312 is disposed between the core 313 and the shell 311.
In the above embodiment, the buffer layer 312 may absorb impact energy to protect the winding core 313 when the battery cell 310 is subjected to external impact, and the buffer layer 312 is made of an insulating material, preferably a rubber material, and is preferably sprayed on an inner wall of the casing 311 of the battery cell by using a spraying method or integrally formed inside the casing 311 of the battery cell. The battery cell 310 is fixed on the battery pack mounting plate 100 by a heat-conducting structural adhesive.
In another aspect, a protection method against external impact is provided, which includes any one of the above embodiments of the battery system against external impact, and is characterized by including the following steps:
s100, the bottom plate of the lower box body assembly is impacted by external force;
s200, repairing cracks generated by the bottom plate through a repairing layer 230 by the bottom plate;
s300, external force impacts the mounting plate through the bottom plate;
s400, the wire-shaped lead 120 is broken by external impact, the control device 400 is triggered, the mounting plate 100 is driven to move upwards along the groove 211 to the separation position, and the battery pack 300 is prevented from impacting;
s500, external force impacts the battery pack through the mounting plate;
s600, absorbing impact force generated by external force impact through the buffer layer 312.
Alternatively, according to the protection method against external impact, in step S400, the wire-shaped wire 120 is broken by external impact, the control device 400 is triggered to drive the mounting plate 100 to move upward along the groove 211 to the separated position, so that the battery pack 300 is protected from the impact, and the method further includes the following steps:
s410, when the filamentous conducting wire 120 is broken by external impact, the monitoring unit 410 outputs a protection signal to the control unit 420;
s420, the protection signal is used to instruct the control unit 420 to send a protection action instruction to the execution unit 430;
s430, the protection action instruction is used for instructing the execution unit 430 to execute a protection action;
s440, the protection action is used for indicating the execution unit 430 to be powered on;
s450, the actuating unit 430 generates an electromagnetic force after being powered on, and the electromagnetic force magnetically repels the protrusion 111, thereby driving the mounting plate 100 to move upward along the groove 211 to the separation position.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A battery system resistant to external impacts, comprising:
the lower box body assembly (200), wherein the lower box body assembly (200) comprises a frame (210), a bottom plate (220) and a repairing layer (230); the frame (210) is connected with the bottom plate (220), the bottom plate (220) is surrounded to form a sealed cavity, the repairing layer (230) is arranged in the sealed cavity, and the repairing layer (230) is used for repairing cracks generated on the surface of the bottom plate;
a mounting plate (100) including a mounting plate body (110) and a wire-like wire (120), the mounting plate body (110) being disposed opposite to the base plate (220), the mounting plate body (110) having an abutting position abutting against the base plate (220) and a separated position separated from the base plate (220), the wire-like wire (120) being disposed on a bottom surface of the mounting plate body (110) in a direction close to the base plate (220);
the battery pack (300) is composed of a plurality of battery cells (310), and the battery pack (300) is fixedly connected with the upper part of the mounting plate (100);
a control device (400), the control device (400) comprising a monitoring unit (410), a control unit (420) and an execution unit (430); the monitoring unit (410) is respectively connected with the filamentous lead (120) and the control unit (420), and the control unit (420) is connected with the execution unit (430); the monitoring unit (410) is used for detecting the on-off state of the filamentous conducting wire (120), and when the filamentous conducting wire (120) is disconnected, the execution unit (430) drives the mounting plate (100) to move from the abutting position with the bottom plate (220) to the separating position.
2. The external impact resistant battery system according to claim 1, wherein the base plate (220) comprises: the bottom plate (220) comprises a bottom plate upper layer (221), a bottom plate middle layer (222) and a bottom plate lower layer (223), the bottom plate upper layer (221) is connected with the bottom plate middle layer (222) in a sealing mode, and the bottom plate middle layer (222) is connected with the bottom plate lower layer (223) in a sealing mode; the bottom plate middle layer (222) divides the sealed cavity into a plurality of accommodating cavities which are communicated with each other and used for accommodating the repairing layer (230); the upper layer (221) is provided with an injection port (224), and the repairing layer (230) is injected into the accommodating cavity through the injection port (224).
3. The battery system capable of resisting external impact according to claim 2, wherein the repair layer (230) comprises an adhesive and fiber particles, the fiber particles are suspended in the adhesive, and the adhesive is a liquid with viscosity of less than 30000mpa.s at a temperature of-40 ℃ to 100 ℃.
4. The battery system capable of resisting external impact according to claim 1, wherein the mounting plate body (110) has a protrusion (111) at an edge thereof, the frame (210) has a groove (211) at an inner side thereof, the protrusion (111) is disposed corresponding to the groove (211), the protrusion (111) is movable up and down along the groove (211), and the mounting plate body (110) and the base plate (220) are fixed by magnetic force.
5. The external impact resistant battery system according to claim 4, wherein the protrusion (111) is a permanent magnet, the protrusion (111) has an isosceles trapezoid shape, and the groove (211) has an isosceles trapezoid shape corresponding to the groove (211) for restraining the lateral and longitudinal displacements of the mounting plate body (110).
6. The battery system capable of resisting external impact according to claim 5, wherein the execution unit (430) is an electromagnet composed of a steel plate and a coil; the execution unit (430) is arranged at the bottom of the groove (211), when the installation plate body (110) is subjected to gravity and the magnetic force of the bulge (111) per se and the execution unit (430) are mutually attracted, the installation plate body (110) and the bottom plate (220) are located at the abutting position, the execution unit (430) and the bulge (111) are abutted, and the bottom plate (220) and the installation plate (100) are fixedly connected through magnetic force.
7. The battery system resistant to external impacts according to claim 6, wherein the steel plate is magnetized when energized and is set to have a polarity opposite to that of the protrusions (111), driving the mounting plate (100) upward to the separated position under the force of the repulsive electromagnetic force.
8. The external impact resistant battery system according to claim 1, wherein the battery cell (310) comprises a casing (311), a buffer layer (312) and a winding core (313); the buffer layer (312) is disposed between the core (313) and the shell (311).
9. A protection method against external impacts, including any one of the battery systems according to claims 1 to 8, comprising:
the bottom plate of the lower box body assembly (200) is impacted by external force;
the bottom plate (220) repairs cracks generated by the bottom plate through a repairing layer (230);
an external force impacts the mounting plate (110) through the bottom plate (220);
the wire-shaped lead (120) is broken by external impact, the control device (400) is triggered, the mounting plate (100) is driven to move upwards along the groove (211) to the separation position, and the battery pack (300) is prevented from being impacted;
an external force impacts the battery pack (300) through the mounting plate (110);
the buffer layer (312) absorbs impact force generated by external force impact.
10. A method of protecting against external impacts according to claim 9, wherein the said wire (120) is broken by an external impact, and the said control device (400) is triggered to drive the said mounting plate (100) to move upwards along the said recess (211) to the said separated position, so as to protect the battery pack (300) from the impact, comprising:
when the filamentous lead (120) is broken by external force impact, the monitoring unit (410) outputs a protection signal to the control unit (420);
the protection signal is used to instruct the control unit (420) to send a protection action instruction to the execution unit (430);
the protection action instruction is used for instructing the execution unit (430) to execute a protection action;
the protection action is to instruct the execution unit (430) to power on;
the actuating unit (430) generates electromagnetic force after being electrified, and the electromagnetic force is magnetically repelled from the protrusion (111), so that the mounting plate (100) is driven to move upwards along the groove (211) to the separation position.
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| CN202210649215.0A CN115133192B (en) | 2022-06-09 | Battery system capable of resisting external impact and protection method |
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| CN202210649215.0A CN115133192B (en) | 2022-06-09 | Battery system capable of resisting external impact and protection method |
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