CN110034259B - Method for preventing sympathetic explosion of battery pack - Google Patents

Method for preventing sympathetic explosion of battery pack Download PDF

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Publication number
CN110034259B
CN110034259B CN201910354990.1A CN201910354990A CN110034259B CN 110034259 B CN110034259 B CN 110034259B CN 201910354990 A CN201910354990 A CN 201910354990A CN 110034259 B CN110034259 B CN 110034259B
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China
Prior art keywords
battery
battery pack
single batteries
battery case
compartment
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CN201910354990.1A
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CN110034259A (en
Inventor
丁桦
周秋萍
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Institute Of Industry Technology Guangzhou & Chinese Academy Of Sciences
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Institute Of Industry Technology Guangzhou & Chinese Academy Of Sciences
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/04—Arrangement or mounting of electrical propulsion units of the electric storage means for propulsion
    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/66—Arrangements of batteries
    • 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
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

Abstract

A method for preventing sympathetic explosion of a battery pack, wherein the battery pack is restrained in a battery compartment and comprises a plurality of single batteries, and when one or more single batteries explode, the battery compartment releases the restraint of the battery pack so that the single batteries are separated from each other. The single batteries are arranged in the battery compartment in a linear mode, and at least one end of the battery compartment is provided with a releasing mechanism for releasing the constraint of the battery compartment on the battery pack. The method for preventing the battery from sympathetic explosion is simple to operate, has multiple implementation modes and low cost, can effectively prevent the single battery from sympathetic explosion, reduces property loss caused by the sympathetic explosion of the battery, and more importantly, can effectively ensure the safety of personnel on the vehicle and roadside pedestrians. According to the invention, by arranging the releasing mechanism, the constraint of the battery compartment on the battery pack can be quickly released in a manual or automatic mode, the quick dispersion of the battery pack can be realized, too many auxiliary mechanisms are not required to be arranged, the cost is low, and the popularization and the use are convenient.

Description

Method for preventing sympathetic explosion of battery pack
Technical Field
The invention relates to the technical field of batteries, in particular to a method for preventing sympathetic explosion of a battery pack.
Background
The lithium ion battery has the characteristics of high energy density, high power density and long service life, is unique in a chemical energy storage device, is technically mature and widely applied in the field of portable electronic products, and is also explosively increased in the field of electric vehicles under the support of national policies. Although lithium ion batteries are generally safe, reports of safety accidents are presented to the public, and more famous ones include ignition and explosion of tesla MODEL S and MODEL x.
The design of the battery pack needs to arrange more electric quantity in a limited space as much as possible, so that a larger endurance mileage can be achieved. Therefore, only one layer of film is arranged between the batteries, the single batteries are almost without space, once a certain single battery is burnt and exploded, other batteries are extruded, and the batteries are exploded in a chain, so that the danger is extremely high.
Disclosure of Invention
The invention aims to overcome at least one defect in the prior art and provides a method for preventing sympathetic explosion of a battery pack, so as to achieve the aims of preventing sympathetic explosion of the battery, reducing property loss and protecting personnel safety.
The technical scheme adopted by the invention is to provide a method for preventing sympathetic explosion of a battery pack, wherein the battery pack is constrained in a battery compartment and comprises a plurality of single batteries, and when one or more single batteries explode, the battery compartment relieves the constraint on the battery pack so as to separate the single batteries respectively.
The invention mainly aims at the field of electric automobiles, and the battery compartment can be a cavity for placing a battery of the electric automobile. The battery pack is arranged in the battery compartment and is composed of a plurality of single batteries, and in order to enable more batteries to be placed in the battery compartment with limited space, the single batteries are generally arranged in the battery compartment in a tight arrangement mode. The battery compartment is fixed in the vehicle body through the extrusion of the pressure at the two sides, or is supported in the vehicle body through the supporting mechanism at the bottom of the battery compartment, when one or more single batteries explode, the constraint of the battery compartment on the battery pack can be manually or automatically released, namely, the two modes are two modes, one mode is that the extrusion force at the two sides is manually or automatically released, the battery compartment falls off from the vehicle body, and the battery pack falls out of the battery compartment, so that the battery compartment is dispersed and the sympathetic explosion is avoided; another way is to manually or automatically release the supporting force of the supporting mechanism at the bottom, which may be to remove the supporting mechanism at the bottom or otherwise release the supporting force of the supporting mechanism at the bottom, so that the battery compartment falls off from the vehicle body, and the battery pack falls out of the battery compartment, thereby scattering and avoiding sympathetic explosion.
The method for preventing the battery from sympathetic explosion is simple to operate, has multiple implementation modes and low cost, can effectively prevent the single battery from sympathetic explosion, reduces property loss caused by the sympathetic explosion of the battery, and more importantly, can effectively ensure the safety of personnel on the vehicle and roadside pedestrians.
Furthermore, the single batteries are linearly arranged in the battery compartment, and at least one end of the battery compartment is provided with a releasing mechanism for releasing the constraint of the battery compartment on the battery pack.
The release mechanism can be used for releasing in two aspects simultaneously or respectively, one mode is that the battery compartment mainly relies on the extrusion force of both sides to fix in the automobile body, and in case the extrusion force of both sides is released, the battery compartment just can fall out the automobile body automatically, and at this moment, the release mechanism mainly is used for releasing the extrusion force of both sides, consequently, the release mechanism can be elastic component or locate the automatic flexible stake at both ends, when one or more battery cells explode, can release the extrusion force through manual or automatic mode, perhaps the flexible stake is shortened to automatic mode for the battery pack directly falls out the automobile body, avoids sympathetic explosion.
The other mode is that the bottom is provided with a supporting mechanism, the battery compartment is mainly supported in the vehicle body by the supporting mechanism, and when the supporting function of the supporting mechanism disappears, the battery can fall out of the vehicle body, so the releasing mechanism is realized by releasing the supporting function of the bottom supporting mechanism.
Because the battery explodes once and the operation of avoiding sympathetic explosion is a time-sharing operation, the invention can rapidly remove the restraint of the battery compartment on the battery pack by a manual or automatic mode by arranging the removing mechanism, can rapidly disperse the battery pack, has simple and rapid operation and can rapidly avoid sympathetic explosion.
Furthermore, the battery pack is free from constraint through the gravity action of each single battery, and mutual separation is realized.
The battery pack is quickly separated by utilizing the action of gravity, and the battery pack is low in cost and convenient to popularize and use without being provided with too many auxiliary mechanisms.
Further, the battery compartment comprises a bottom battery case unit for supporting the battery pack, and the release mechanism enables the single batteries to be separated and dispersed through the action of gravity by releasing the supporting force of the bottom battery case unit.
Because electric automobile is at the driving in-process, it is difficult to exempt from or have vibrations even striking etc. in order to further improve the firm of group battery in the battery compartment and decide, avoids the automobile body at the driving in-process, and the battery falls out the battery compartment, the strutting arrangement of battery compartment bottom is bottom battery shell unit, plays main supporting role, has improved the stability of group battery in the battery compartment, release the mechanism through relieving the holding power of bottom battery shell unit for the monomer battery is through the separation of action of gravity scatter.
The mode that the release mechanism relieved holding power also can be various, and the release mechanism can be the connecting piece of connecting bottom battery case unit and automobile body for the group battery can be stably arranged in on the bottom battery case unit, when the battery cell explodes, the release mechanism removes or mode such as fracture, loses the connection effect, makes the group battery freely fall down, and the battery cell scatters.
Further, the release mechanism comprises a wedge block and a bolt, wherein the wedge block fixes the bottom battery case unit and the vehicle body and locks the bottom battery case unit through the bolt.
One end of the wedge-shaped block is connected with the bottom battery case unit, the other end of the wedge-shaped block is connected with the vehicle body, and the wedge-shaped block is clamped at one end of the wedge-shaped block through the bolt to prevent the wedge-shaped block from falling out. The both ends of bottom battery case unit are drawn through the wedge promptly, and when monomer battery exploded, manual or automatic control bolt broke off the round pin, and the wedge withdrawed from, and bottom battery case unit and group battery all dropped, had avoided sympathetic explosion.
Furthermore, the release mechanism is a flexible elastic sheet, one end of the flexible elastic sheet is connected with the vehicle body, and the other end of the flexible elastic sheet presses the bottom battery case unit.
Except the fixed mode of wedge, also can realize similar effect through flexible shell fragment, flexible shell fragment one end is fixed with the automobile body, and bottom battery case unit is withstood to the other end for bottom battery case unit is fixed under the extrusion at both ends, when monomer battery explodes, can manual or automatic application of force, makes flexible shell fragment lose to both sides extruded pressure, makes bottom battery case unit together with the group battery drop out the battery cabin downwards.
Further, the bottom battery shell unit comprises end battery shell units arranged at two ends and a plurality of middle battery shell units connected with the end battery shell units, the end battery shell units and the middle battery shell units are buckled with each other, the releasing mechanism is connected with the end battery shell units and the vehicle body and used for horizontally tensioning the bottom battery shell unit, when single batteries explode, the releasing mechanism releases tensioning force, so that the buckled end battery shell units and the middle battery shell units are scattered, and the single batteries fall off under the action of gravity.
Furthermore, an explosion detection sensor for detecting explosion of the single battery is also arranged in the battery cabin.
The explosion detection sensors can be arranged in a plurality of numbers, and the sensitivity and the accuracy of detection are ensured.
Furthermore, elastic pieces which are convenient for the dispersion of the single batteries are arranged among the single batteries.
In order to facilitate battery explosion, each single battery can be rapidly separated, a spring plate can be arranged between the single batteries, and when the single batteries fall downwards, separation can be more rapid, and sympathetic explosion risk is further reduced.
Furthermore, the battery pack releasing device is also provided with a control end, and the control end is used for controlling the releasing mechanism to release the constraint of the battery compartment on the battery pack.
The control end mainly used collects the information of explosion detection sensor, and when monomer battery took place to explode, explosion detection sensor detected that monomer battery took place to explode, with signal transmission to control end, control end re-control release mechanism removed the constraint of battery compartment to the group battery for the group battery has avoided sympathetic explosion because the action of gravity is scattered downwards.
Compared with the prior art, the invention has the beneficial effects that:
(1) the method for preventing the battery from sympathetic explosion is simple to operate, has multiple implementation modes, is low in cost, can effectively prevent the monomer battery from sympathetic explosion, reduces property loss caused by the sympathetic explosion of the battery, and more importantly, can effectively guarantee the safety of personnel on the vehicle and roadside pedestrians.
(2) According to the invention, by arranging the removing mechanism, the constraint of the battery pack by the battery compartment can be rapidly removed manually or automatically, the rapid dispersion of the battery pack can be realized, the operation is simple and rapid, sympathetic explosion can be rapidly avoided, the rapid separation of the battery pack can be realized by utilizing the action of gravity, too many auxiliary mechanisms are not required, the cost is low, and the popularization and the use are convenient.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a battery anti-sympathetic explosion assembly of the present invention.
Fig. 2 is a schematic view of still another overall structure of the sympathetic explosion prevention assembly for a battery of the present invention.
Fig. 3 is a partially enlarged schematic view of the release mechanism in embodiment 2.
Fig. 4 is a partially enlarged schematic view of the release mechanism in embodiment 3.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
A method for preventing a sympathetic explosion of a battery pack is characterized in that the battery pack is restrained in a battery compartment and comprises a plurality of single batteries, and when one or more single batteries explode, the battery compartment releases the restraint on the battery pack so that the single batteries are separated from one another.
The invention mainly aims at the field of electric automobiles, and the battery compartment can be a cavity for placing a battery of the electric automobile. The battery pack is arranged in the battery compartment and is composed of a plurality of single batteries, and in order to enable more batteries to be placed in the battery compartment with limited space, the single batteries are generally arranged in the battery compartment in a tight arrangement mode. The battery compartment is fixed in the vehicle body through the extrusion of the pressure at the two sides, or is supported in the vehicle body through the supporting mechanism at the bottom of the battery compartment, when one or more single batteries explode, the constraint of the battery compartment on the battery pack can be manually or automatically released, namely, the two modes are two modes, one mode is that the extrusion force at the two sides is manually or automatically released, the battery compartment falls off from the vehicle body, and the battery pack falls out of the battery compartment, so that the battery compartment is dispersed and the sympathetic explosion is avoided; another way is to manually or automatically release the supporting force of the supporting mechanism at the bottom, which may be to remove the supporting mechanism at the bottom or otherwise release the supporting force of the supporting mechanism at the bottom, so that the battery compartment falls off from the vehicle body, and the battery pack falls out of the battery compartment, thereby scattering and avoiding sympathetic explosion.
The method for preventing the battery from sympathetic explosion is simple to operate, has multiple implementation modes and low cost, can effectively prevent the single battery from sympathetic explosion, reduces property loss caused by the sympathetic explosion of the battery, and more importantly, can effectively ensure the safety of personnel on the vehicle and roadside pedestrians.
Furthermore, the single batteries are linearly arranged in the battery compartment, and at least one end of the battery compartment is provided with a releasing mechanism for releasing the constraint of the battery compartment on the battery pack.
The release mechanism can be used for releasing in two aspects simultaneously or respectively, one mode is that the battery compartment mainly relies on the extrusion force of both sides to fix in the automobile body, and in case the extrusion force of both sides is released, the battery compartment just can fall out the automobile body automatically, and at this moment, the release mechanism mainly is used for releasing the extrusion force of both sides, consequently, the release mechanism can be elastic component or locate the automatic flexible stake at both ends, when one or more battery cells explode, can release the extrusion force through manual or automatic mode, perhaps the flexible stake is shortened to automatic mode for the battery pack directly falls out the automobile body, avoids sympathetic explosion.
The other mode is that the bottom is provided with a supporting mechanism, the battery compartment is mainly supported in the vehicle body by the supporting mechanism, and when the supporting function of the supporting mechanism disappears, the battery can fall out of the vehicle body, so the releasing mechanism is realized by releasing the supporting function of the bottom supporting mechanism.
Because the battery explodes once and the operation of avoiding sympathetic explosion is a time-sharing operation, the invention can rapidly remove the restraint of the battery compartment on the battery pack by a manual or automatic mode by arranging the removing mechanism, can rapidly disperse the battery pack, has simple and rapid operation and can rapidly avoid sympathetic explosion.
Furthermore, the battery pack is free from constraint through the gravity action of each single battery, and mutual separation is realized.
The battery pack is quickly separated by utilizing the action of gravity, and the battery pack is low in cost and convenient to popularize and use without being provided with too many auxiliary mechanisms.
Further, the battery compartment comprises a bottom battery case unit for supporting the battery pack, and the release mechanism enables the single batteries to be separated and dispersed through the action of gravity by releasing the supporting force of the bottom battery case unit.
Because electric automobile is at the driving in-process, it is difficult to exempt from or have vibrations even striking etc. in order to further improve the firm of group battery in the battery compartment and decide, avoids the automobile body at the driving in-process, and the battery falls out the battery compartment, the strutting arrangement of battery compartment bottom is bottom battery shell unit, plays main supporting role, has improved the stability of group battery in the battery compartment, release the mechanism through relieving the holding power of bottom battery shell unit for the monomer battery is through the separation of action of gravity scatter.
The mode that the release mechanism relieved holding power also can be various, and the release mechanism can be the connecting piece of connecting bottom battery case unit and automobile body for the group battery can be stably arranged in on the bottom battery case unit, when the battery cell explodes, the release mechanism removes or mode such as fracture, loses the connection effect, makes the group battery freely fall down, and the battery cell scatters.
Further, the release mechanism comprises a wedge block and a bolt, wherein the wedge block fixes the bottom battery case unit and the vehicle body and locks the bottom battery case unit through the bolt.
One end of the wedge-shaped block is connected with the bottom battery case unit, the other end of the wedge-shaped block is connected with the vehicle body, and the wedge-shaped block is clamped at one end of the wedge-shaped block through the bolt to prevent the wedge-shaped block from falling out. The both ends of bottom battery case unit are drawn through the wedge promptly, when battery cell explodes, and the round pin is taken off to manual or automatic control bolt, and the wedge withdraws from, and bottom battery case unit and group battery all drop, have avoided sympathetic detonation.
Furthermore, the release mechanism is a flexible elastic sheet, one end of the flexible elastic sheet is connected with the vehicle body, and the other end of the flexible elastic sheet presses the bottom battery case unit.
Except the fixed mode of wedge, also can realize similar effect through flexible shell fragment, flexible shell fragment one end is fixed with the automobile body, and bottom battery case unit is withstood to the other end for bottom battery case unit is fixed under the extrusion at both ends, when monomer battery explodes, can manual or automatic application of force, makes flexible shell fragment lose to both sides extruded pressure, makes bottom battery case unit together with the group battery drop out the battery cabin downwards.
Further, the bottom battery shell unit comprises end battery shell units arranged at two ends and a plurality of middle battery shell units connected with the end battery shell units, the end battery shell units and the middle battery shell units are buckled with each other, the releasing mechanism is connected with the end battery shell units and the vehicle body and used for horizontally tensioning the bottom battery shell unit, when single batteries explode, the releasing mechanism releases tensioning force, so that the buckled end battery shell units and the middle battery shell units are scattered, and the single batteries fall off under the action of gravity.
Furthermore, an explosion detection sensor for detecting explosion of the single battery is also arranged in the battery cabin.
The explosion detection sensors can be arranged in a plurality of numbers, and the sensitivity and the accuracy of detection are ensured.
Furthermore, elastic pieces which are convenient for the dispersion of the single batteries are arranged among the single batteries.
In order to facilitate battery explosion, each single battery can be rapidly separated, a spring plate can be arranged between the single batteries, and when the single batteries fall downwards, separation can be more rapid, and sympathetic explosion risk is further reduced.
Furthermore, the battery pack releasing device is also provided with a control end, and the control end is used for controlling the releasing mechanism to release the constraint of the battery compartment on the battery pack.
The control end mainly used collects the information of explosion detection sensor, and when monomer battery took place to explode, explosion detection sensor detected that monomer battery took place to explode, with signal transmission to control end, control end re-control release mechanism removed the constraint of battery compartment to the group battery for the group battery has avoided sympathetic explosion because the action of gravity is scattered downwards.
Example 2
The embodiment provides a battery that prevents battery sympathetic explosion subassembly, as shown in fig. 1 ~ 2, including the battery compartment that the cavity of placing the battery by the battery of automobile body 6 constitutes, the battery compartment is enclosed by battery case 1 and closes and forms, and battery case 1 includes battery case unit 2 and bottom battery case unit 3 all around. The surrounding battery case unit 2 can restrict the shaking of the battery pack. The bottom battery cell 3 includes a two-end battery cell 31 and a middle battery cell 32. The battery case units 31 at the two ends and the battery case unit 32 in the middle are buckled with each other, a battery pack consisting of a plurality of single batteries 8 arranged side by side is arranged on the bottom battery case unit 3, when tension is generated at the two ends of the bottom battery case unit 3, the bottom battery case unit 3 has bearing capacity, when the tension at the two ends of the bottom battery case unit 3 is removed, the bottom battery case unit 3 loses the bearing capacity, and the bottom battery case unit 3 and the single batteries 8 fall down.
The bottom battery case unit 3 is fixed by a release mechanism 9 provided between the both-end battery case units 4 and the vehicle body 6, and the battery 8 is placed on the bottom battery case unit 3. Can set up shell fragment 10 between the battery 8, when removing the pretightning force inefficacy on the mechanism 9, after bottom battery case unit 3 and battery 8 fall down, shell fragment 10 makes and breaks away from a certain distance each other between the battery 8, reaches the effect of preventing sympathetic explosion.
Referring to fig. 3, the release mechanism 9 includes a wedge block 91 and a latch 92, and the pretension force failure of the release mechanism 9 can be realized by the following steps: can set up a plurality of explosion detection sensors in the battery box, when certain battery of group battery explodes, control bolt 92 is pulled out, and wedge 91 outwards withdraws from, and bottom battery case unit 3 drops down with battery 8. Wedge blocks 91 are arranged on the vehicle body 6 and the battery case units 4 at the two ends, and bolt holes are arranged on the wedge blocks 91.
The control bolt 92 can be pulled up by a control end control motor or manually.
Example 3
The embodiment provides a battery that prevents battery sympathetic explosion subassembly, as shown in fig. 1 ~ 2, including the battery compartment that the cavity of placing the battery by the battery of automobile body 6 constitutes, the battery compartment is enclosed by battery case 1 and closes and forms, and battery case 1 includes battery case unit 2 and bottom battery case unit 3 all around. The surrounding battery case unit 2 can restrict the shaking of the battery pack. The bottom battery cell 3 includes a two-end battery cell 31 and a middle battery cell 32. The battery case units 31 at the two ends and the battery case unit 32 in the middle are buckled with each other, a battery pack consisting of a plurality of single batteries 8 arranged side by side is arranged on the bottom battery case unit 3, when tension is generated at the two ends of the bottom battery case unit 3, the bottom battery case unit 3 has bearing capacity, when the tension at the two ends of the bottom battery case unit 3 is removed, the bottom battery case unit 3 loses the bearing capacity, and the bottom battery case unit 3 and the single batteries 8 fall down.
The bottom battery case unit 3 is fixed by the release mechanism 9 provided between the both-end battery case units 31 and the vehicle body 6, and the battery 8 is placed on the bottom battery case unit 3. Can set up shell fragment 10 between the battery 8, when removing the pretightning force inefficacy on the mechanism 9, after bottom battery case unit 3 and battery 8 fall down, shell fragment 10 makes and breaks away from a certain distance each other between the battery 8, reaches the effect of preventing sympathetic explosion.
As shown in fig. 4, the pretensioning force of the release mechanism 9 can be deactivated in the following manner: a plurality of explosion detection sensors may be provided in the battery compartment, and when a certain battery of the battery pack explodes, the control force F is removed, and the bottom battery housing unit 3 and the battery 8 fall down. In normal use, F acts on the connecting rod 93, one side of the connecting rod 93 is hinged on the vehicle body 6, one side of the connecting rod 93 is propped against the battery shell units 31 at the two ends, and rubber 20 can be adhered to the two sides of the battery shell units 31 at the two ends to increase the friction coefficient.
The action form of the F acting force can be an electric driving push rod or a push rod which can be manually removed, and the action form is various.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.

Claims (6)

1. A method for preventing sympathetic explosion of a battery pack, wherein the battery pack is restrained in a battery compartment and comprises a plurality of single batteries, and the method is characterized in that when one or more single batteries explode, the battery compartment releases the restraint of the battery pack, so that the single batteries are separated; the single batteries are linearly arranged in the battery compartment, and at least one end of the battery compartment is provided with a releasing mechanism for releasing the constraint of the battery compartment on the battery pack; the battery compartment comprises a bottom battery case unit for supporting the battery pack, and the release mechanism enables the single batteries to be separated and dispersed through the action of gravity by releasing the supporting force of the bottom battery case unit; the bottom battery case unit comprises end battery case units arranged at two ends and a plurality of middle battery case units connected with the end battery case units, the end battery case units are buckled with the middle battery case units, the releasing mechanism is connected with the end battery case units and the vehicle body and used for horizontally tensioning the bottom battery unit, when single batteries explode, the releasing mechanism releases tensioning force, so that the end battery case units and the middle battery case units buckled with each other are scattered, and the single batteries fall off under the action of gravity.
2. A method of preventing a sympathetic explosion of a battery pack according to claim 1, wherein the release mechanism comprises a wedge block and a latch, the wedge block securing the bottom battery case unit to the vehicle body and being locked by the latch.
3. A method of preventing sympathetic explosion of a battery pack according to claim 2, wherein the release mechanism is a flexible tab having one end connected to the vehicle body and the other end pressing against the bottom battery case unit.
4. A method for preventing sympathetic explosion of a battery pack according to any one of claims 1 to 3, wherein an explosion detection sensor for detecting explosion of a single battery is further arranged in the battery compartment.
5. A method for preventing sympathetic explosion of a battery pack according to any one of claims 1 to 3, wherein shrapnel for facilitating the dispersion of the single batteries is further arranged among the single batteries.
6. A method of preventing sympathetic explosion of a battery pack according to any one of claims 1 to 3, wherein a control terminal is provided for controlling the release mechanism to release the restraint of the battery pack from the battery compartment.
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