CN114284630B - Battery box end plate, battery assembly, electric vehicle and exhaust control method - Google Patents
Battery box end plate, battery assembly, electric vehicle and exhaust control method Download PDFInfo
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- CN114284630B CN114284630B CN202111447416.4A CN202111447416A CN114284630B CN 114284630 B CN114284630 B CN 114284630B CN 202111447416 A CN202111447416 A CN 202111447416A CN 114284630 B CN114284630 B CN 114284630B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 121
- 239000000779 smoke Substances 0.000 claims description 37
- 238000012544 monitoring process Methods 0.000 claims description 15
- 230000002159 abnormal effect Effects 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 238000004880 explosion Methods 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- 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
Abstract
The application relates to a battery box end plate, a battery assembly, an electric vehicle and a control method. The device comprises a battery box end plate body, a water inlet pipe joint, a water outlet pipe joint, a quick water pipe joint, a low-voltage harness joint and a high-voltage joint; the battery box end plate body is arranged at the front end of the battery lower box body; the water inlet pipe joint and the water outlet pipe joint are fixed on the end plate body of the battery box body; the water inlet pipe joint and the water outlet pipe joint are both fixed on the end plate body of the battery box body; both ends of the water inlet pipe joint and the water outlet pipe joint are connected with one end of the quick-connect water pipe joint; the low-voltage harness connector is fixed on the battery box body end plate body, one end of the low-voltage harness connector is connected with the battery BMS system, and the other end of the low-voltage harness connector is connected with the whole vehicle HCU; one end of the high-voltage connector is connected with a high-voltage wire inside the battery pack, and the other end of the high-voltage connector is connected with a high-voltage wire outside the battery pack. The application has simple structure, high exhaust efficiency and large exhaust capacity, can improve the gas discharge speed of the battery box body and improve the safety performance of the battery assembly.
Description
Technical Field
The application relates to the technical field of automobiles, in particular to a battery box end plate, a battery assembly, an electric vehicle and a control method.
Background
At present, the development prospect of new energy automobiles is very wide, but various new energy automobiles frequently have safety problems along with the development of technology. The safety performance of the power battery as a key core part of the new energy automobile is always an industrial problem. Because the power battery generally adopts a lithium ion battery, the battery has high energy density and good functional performance, but is easy to generate thermal runaway under extreme conditions, and the battery generates a large amount of high-temperature and high-pressure gas and solid in a short time, which can cause ignition and explosion of a battery pack and has extremely high potential safety hazard.
The patent with the publication number of CN212161866U discloses a battery exhaust and pressure relief device for new energy automobiles, which comprises a battery shell, the up end of the battery shell is provided with a pressure relief groove, the inside bottom of the pressure relief groove is provided with a buffering bin, the upper side of the buffering bin is provided with a limiting plate and an exhaust valve plate in the inside of the pressure relief groove, the edge of the pressure relief groove is provided with a connecting block protruding the upper side of the battery shell, the connecting block is sheathed with a dustproof shell, and a dustproof net is arranged on the dustproof shell. This application extrudees the discharge valve piece when pressure is a definite time to in discharging pressure and heat into the pressure release groove through the discharge valve piece, reach the outside of dispelling the heat of battery inside to the battery, improve the life of battery, the limit plate prevents that the degree of discharge valve piece deformation is too big, gets into impurity such as dust, and the dust screen helps balanced atmospheric pressure and prevents the effect of dust, improves the practicality of device, rubber cap hoisting device's security.
Patent publication number CN212366036U discloses a lithium ion battery exhaust power device. The lithium ion battery exhaust power device comprises an exhaust pipe arranged on a battery frame, the exhaust pipe comprises a main pipe and a plurality of branch pipes, the bottom side of the exhaust pipe is an air inlet, the top side of the exhaust pipe is an air outlet, the top side of the exhaust pipe is connected with an explosion-proof fan in a sealing manner, the other end of the explosion-proof fan is connected with an exhaust gas collecting pipeline, and the other end of the exhaust gas collecting pipeline is connected with an exhaust gas treatment device. According to the application, the explosion-proof fan is connected to the main pipe, so that the gas is combustible, and contacts the explosion-proof fan, the safety of the system is guaranteed, the explosion-proof fan can generate negative pressure on the exhaust pipe, and the gas exhausted by any battery box can be collected together through the explosion-proof fan and then treated uniformly; through the double seal protection of the first sealing ring and the second sealing ring, toxic combustible gas can not leak, and the safety and the reliability are realized.
Patent publication number CN110993880a discloses a soft package lithium ion battery exhaust device and an exhaust method, the exhaust device comprises: a sealed cavity is formed between the upper cavity and the lower cavity after the upper cavity and the lower cavity are sealed, the battery body is positioned on the inner wall of the lower cavity corresponding to the sealed cavity, the evacuating sucker is arranged on the inner wall of the lower cavity through the evacuating channel, the waste liquid collecting cavity is arranged at the outer side of the evacuating channel, the hole punching needle is arranged at the lower end of the driving cylinder, a hole punching is formed on the battery air bag, the lower end of the driving cylinder is fixed with a circular upper end socket heating wire, and a lower end socket heating plate is arranged on the lower cavity corresponding to the upper end socket heating wire; the application realizes that the linear isolation seal is replaced by the round seal, the seal area is greatly reduced, the power of the required driving device and the processing precision requirement of the seal head are reduced under the condition of reaching the same seal pressure intensity due to the reduction of the seal area, the realization is relatively easy, the cost of the corresponding whole device is also reduced, and the device in the method can be more flexibly adapted to the change of different battery sizes.
However, the above application is different from the present application in terms of technical problems and technical solutions to be solved, and the exhaust system solution integrated with the water pipe joint and the low-voltage harness joint is not provided in the above application, nor is it easily determined by a person skilled in the art through a limited number of experiments by conventional means through common general knowledge.
Disclosure of Invention
The application provides a battery box end plate, a battery assembly, an electric vehicle and a control method, wherein the active double exhaust device has the advantages of simple structure, high exhaust efficiency and large exhaust capacity, can improve the gas discharge speed of the battery box, improve the safety performance of the battery assembly, and solve the explosion problem caused by the fact that gas cannot be discharged rapidly due to overlarge internal pressure of a battery pack.
The technical scheme of the application is as follows in combination with the accompanying drawings:
in one aspect, a battery box end plate is provided, which comprises a battery box end plate body 1, a water inlet pipe joint 2, a water outlet pipe joint 3, a quick water pipe joint 4, a low-voltage harness joint 5 and a high-voltage joint 6; the battery box end plate body 1 is arranged at the front end of the battery lower box; the water inlet pipe joint 2 and the water outlet pipe joint 3 are fixed on the battery box end plate body 1; the water inlet pipe joint 2 and the water outlet pipe joint 3 are both fixed on the battery box end plate body 1; both ends of the water inlet pipe joint 2 and the water outlet pipe joint 3 are connected with one end of the quick-connect pipe joint 4; the other end of the quick water pipe joint 4 is connected with a water pipe; the low-voltage harness connector 5 is fixed on the battery box end plate body 1, one end inside the battery pack is connected with the battery BMS system, and one end outside the battery pack is connected with the whole vehicle HCU; the high-voltage connector 6 is fixed on the battery box end plate body 1, one end of the high-voltage connector is connected with a high-voltage wire inside the battery pack, and the other end of the high-voltage connector is connected with a high-voltage wire outside the battery pack.
Further, the water inlet pipe joint 2 comprises a first smoke sensor 201, two first connecting male heads 202, two first electromagnetic control devices 203 and two first straight through pipelines 204; the smoke sensor 201 is connected with two first electromagnetic control devices 203; the two first electromagnetic control devices 203 are connected with the two first connection male heads 202 through two first through pipelines 204; the two first connecting male connectors 202 are connected with the quick-connect pipe connector 4; the first smoke sensor 201 is used for monitoring a harmful gas state signal inside the battery pack; the first electromagnetic control device 203 receives the harmful gas state signal inside the battery pack monitored by the first smoke sensor 201 and controls the connection of the first connection male connector 202 and the quick-connect pipe connector 4.
Further, the water outlet pipe joint 3 comprises a second smoke sensor 301, two second connecting male heads 302, two second electromagnetic control devices 303 and two second straight-through pipelines 304; the smoke sensor 301 is connected to two second electromagnetic control devices 303; the two second electromagnetic control devices 303 are connected with the two second connecting male heads 302 through two second through pipelines 304; the two second connecting male heads 302 are connected with the quick-connect pipe connector 4; the second smoke sensor 301 is used for monitoring a harmful gas state signal inside the battery pack; the second electromagnetic control device 303 receives the harmful gas state signal inside the battery pack monitored by the second smoke sensor 301 and controls the connection between the second connection male head 302 and the quick-connect pipe connector 4.
Furthermore, the lengths of straight hole channels in the water inlet pipe joint 2 and the water outlet pipe joint 3 are more than or equal to 200mm.
Further, the low-voltage harness connector 5 comprises a transverse buckle 501, a harness connector 502, a harness terminal 503 and a harness electromagnetic control device 504; the low-voltage harness connector 5 is clamped and fixed on the battery box end plate body 1 through a transverse buckle 501; a harness connector 502 is fixed at the front end of the transverse buckle 501; a harness terminal 503 is provided on the harness connector 502; the harness terminal 503 is connected to a battery BMS system; the transverse buckle 501 is connected with an electromagnetic control device 504; the wire harness electromagnetic control device 504 is connected with the whole vehicle HCU, and controls the clamping and fixing of the transverse buckle 501 according to the received signal.
In a second aspect, a battery assembly is provided that includes a battery case end plate.
In a third aspect, an electric vehicle is provided that includes a battery assembly.
In a fourth aspect, a method for exhausting an end plate of a battery case is achieved by an end plate of a battery case, including:
monitoring the harmful gas concentration signal inside the battery pack through the first smoke sensor 201 of the water inlet pipe 2 and transmitting the signal to the first electromagnetic control device 203; the first electromagnetic control device 203 determines a safety threshold according to the thermal runaway state of the battery module in the battery pack, once the concentration of harmful gas exceeds the safety threshold, the first electromagnetic control device 203 controls the connection between the first connection male head 202 and the quick water plugging pipe connector 4, namely the quick water plugging pipe connectors 4 at two ends are quickly popped up by the first electromagnetic control device 203 to disconnect, so that a through hole is formed, and the harmful gas is quickly discharged;
the second smoke sensor 301 of the water outlet pipe 3 monitors the harmful gas concentration signal inside the battery pack and transmits the signal to the first electromagnetic control device 303; the first electromagnetic control device 303 determines a safety threshold according to the thermal runaway state of the battery module inside the battery pack, once the concentration of harmful gas exceeds the safety threshold, the second electromagnetic control device 303 controls the connection between the second connection male head 302 and the quick-connection water pipe connector 4, namely the second electromagnetic control device 303 rapidly pops up the quick-connection water pipe connectors 4 at two ends and disconnects the connection, thereby forming a through hole and rapidly discharging the harmful gas;
the signal received by the wire harness electromagnetic control device 504 of the low-voltage wire harness connector 5 controls the clamping and fixing of the transverse buckle 501, namely, the wire harness electromagnetic control device 504 can quickly slide out the transverse buckle 501 along the direction of the inserted sliding rail, at the moment, the low-voltage wire harness connector 5 can drop downwards due to no fixing, a through hole is formed in the end plate 1 of the battery box body, and harmful gas is quickly discharged.
Further, the safety threshold is twice the normal value of the gas.
Further, the signals received by the electromagnetic control device 504 include abnormal voltage changes, abnormal current changes, and abnormal insulation resistance changes.
The beneficial effects of the application are as follows:
1) The application has simple structure, high exhaust efficiency and large exhaust capacity, and can effectively improve the safety performance of the battery assembly;
2) When thermal runaway occurs in the battery pack, the water inlet pipe joint 2 and the water outlet pipe joint 3 are disconnected with the quick water inlet pipe joint 4, harmful gas in the battery pack can be rapidly discharged through straight hole channels in the water inlet pipe joint 2 and the water outlet pipe joint 3, and at the moment, the gas temperature is higher, and when the harmful gas passes through the gas channels, heat can be rapidly transferred to the water pipe joint due to good heat conduction performance of materials of the water inlet pipe joint 2 and the water outlet pipe joint 3, so that the temperature of discharged gas is reduced, and the potential risk of overflowing high-temperature gas possibly caused is reduced;
3) When the wire harness electromagnetic control device 504 receives a battery thermal runaway signal, the wire harness electromagnetic control device 504 controls the clamping and fixing of the transverse buckle 501, namely the wire harness electromagnetic control device 504 can quickly slide out the transverse buckle 501 along the direction of an inserted sliding rail, at the moment, the low-voltage wire harness connector 5 can drop downwards due to no fixing, two through holes are formed in the battery box end plate 1, and harmful gas is quickly discharged;
4) The water inlet pipe joint 2, the water outlet pipe joint 3 and the low-voltage wire harness joint 5 are different in signal mode for judging thermal runaway, double-layer monitoring is achieved, and harmful gas is prevented from being discharged in time due to failure of a single signal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a part of the structure of the present application at an angle;
FIG. 2 is a schematic view of a portion of another angle of the structure of the present application;
FIG. 3 is a schematic view of the water inlet pipe joint in the present application;
FIG. 4 is a schematic view of the structure of the water outlet pipe joint of the present application;
FIG. 5 is a schematic view of the low voltage harness connector of the present application at an angle;
fig. 6 is a schematic view of another angle of the low voltage harness connector of the present application.
In the figure:
1. a battery case end plate body;
2. a water inlet pipe joint;
201. a first smoke sensor; 202. a first connection male; 203. a first electromagnetic control device; 204. a first straight-through pipeline;
3. a water outlet pipe joint;
301. a second smoke sensor; 302. the second connecting male head; 303. a second electromagnetic control device; 304. a second straight-through pipeline;
4. a quick water pipe joint;
5. a low voltage harness connector;
501. a transverse buckle; 502. a harness joint; 503. a harness terminal; 504. a harness electromagnetic control device;
6. high pressure connection.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Example 1
Referring to fig. 1 and 2, the embodiment provides a battery box end plate, which comprises a battery box end plate body 1, a water inlet pipe joint 2, a water outlet pipe joint 3, a quick water pipe joint 4, a low-voltage harness joint 5 and a high-voltage joint 6.
The battery box end plate body 1 is arranged at the front end of the battery lower box.
The water inlet pipe joint 2 is fixed on the battery box end plate body 1; the inner side and the outer side of the battery box body of the water inlet pipe connector 2 are connected with the quick-plugging water pipe connector 4 and are used for connecting through plates in a battery liquid cooling system, so that cooling liquid is ensured to enter the battery liquid cooling system.
Referring to fig. 3, the water inlet pipe joint 2 includes a first smoke sensor 201, two first connection male heads 202, two first electromagnetic control devices 203, and two first straight pipes 204.
The first smoke sensor 201 is connected with two first electromagnetic control devices 203; the two first electromagnetic control devices 203 are connected with the two first connection male heads 202 through two first through pipelines 204; the two first connecting male connectors 202 are connected with the quick-connect pipe connector 4.
The first smoke sensor 201 is used for monitoring a harmful gas state signal inside the battery pack;
the first electromagnetic control device 203 is configured to receive a harmful gas status signal inside the battery pack monitored by the first smoke sensor 201, and control connection between the first connection male connector 202 and the quick connector pipe connector 4.
The length of the straight hole channel in the water inlet pipe joint 2 is more than or equal to 200mm.
The material of the water inlet pipe joint 2 comprises, but is not limited to, high-strength, high-heat-conductivity and easy-to-mold metal materials such as aluminum alloy, iron alloy, titanium alloy and the like.
The first smoke sensor 201 of the water inlet pipe 2 monitors the harmful gas concentration signal inside the battery pack and transmits the signal to the first electromagnetic control device 203; the first electromagnetic control device 203 determines a safety threshold according to the thermal runaway state of the battery module inside the battery pack, once the concentration of harmful gas exceeds the safety threshold, the first electromagnetic control device 203 controls the connection between the first connection male connector 202 and the quick water plugging pipe connector 4, namely, the first electromagnetic control device 203 rapidly pops up the quick water plugging pipe connectors 4 at two ends and disconnects the quick water plugging pipe connectors, thereby forming a through hole and rapidly discharging the harmful gas.
Namely, when thermal runaway occurs in the battery pack, the water inlet pipe joint 2 is disconnected with the quick water inlet pipe joint 4, harmful gas in the battery pack is quickly discharged through the straight hole channel in the water inlet pipe joint 2, the gas temperature at the moment is higher, and when the gas channel is used, heat can be quickly transferred to the water pipe joint due to good heat conducting property of the material of the water inlet pipe joint 2, so that the temperature of discharged gas is reduced, and the potential risk of overflowing high-temperature gas possibly caused is reduced.
Venting is initiated when the monitored abnormal gas concentration is greater than twice the normal value.
Referring to fig. 4, the outlet pipe joint 3 includes a second smoke sensor 301, two second connection male heads 302, two second electromagnetic control devices 303, and two second through pipes 304.
The second smoke sensor 301 is connected to two second electromagnetic control devices 303; the two second electromagnetic control devices 303 are connected with the two second connecting male heads 302 through two second through pipelines 304; the two second connecting male connectors 302 are connected with the quick-connect pipe connector 4.
The second smoke sensor 301 is used for monitoring a harmful gas state signal inside the battery pack;
the second electromagnetic control device 303 is configured to receive a harmful gas status signal inside the battery pack monitored by the second smoke sensor 301, and control connection between the second connection male connector 302 and the quick-connect pipe connector 4.
The length of the straight hole channel in the water outlet pipe joint 3 is more than or equal to 200mm.
The material of the water outlet pipe joint 3 includes, but is not limited to, high-strength, high-heat-conductivity and easy-to-form metal materials such as aluminum alloy, iron alloy, titanium alloy and the like.
The second smoke sensor 301 of the water inlet pipe 3 monitors the harmful gas concentration signal inside the battery pack and transmits the signal to the second electromagnetic control device 303; the second electromagnetic control device 303 determines a safety threshold according to the thermal runaway state of the battery module inside the battery pack, once the concentration of the harmful gas exceeds the safety threshold, the second electromagnetic control device 303 controls the connection between the second connection male head 302 and the quick-connection water pipe connector 4, that is, the quick-connection water pipe connectors 4 at two ends are quickly ejected by the second electromagnetic control device 303 to disconnect, so that a through hole is formed, and the harmful gas is quickly discharged.
Namely, when thermal runaway occurs in the battery pack, the water outlet pipe connector 3 is disconnected with the quick water inlet pipe connector 4, harmful gas in the battery pack can be quickly discharged through the straight hole channel in the water outlet pipe connector 3, the gas temperature at the moment is higher, and when the gas channel is used, heat can be quickly transferred to the water outlet pipe connector due to good heat conducting property of the material of the water outlet pipe connector 3, so that the temperature of discharged gas is reduced, and the potential risk of overflowing high-temperature gas possibly caused is reduced.
Venting is initiated when the monitored abnormal gas concentration is greater than twice the normal value.
Referring to fig. 5 and 6, the low voltage harness connector 5 includes a transverse buckle 501, a harness connector 502, a harness terminal 503, and a harness electromagnetic control device 504. One end of the low-voltage harness connector 5 is connected with the battery BMS system, and the other end of the low-voltage harness connector is connected with the whole vehicle HCU.
The low-voltage harness connector 5 is clamped and fixed on the battery box end plate body 1 through a transverse buckle 501; a harness connector 502 is fixed at the front end of the transverse buckle 501; a harness terminal 503 is provided on the harness connector 502; the harness terminal 503 is connected with the battery BMS system and can receive a battery thermal runaway signal; the transverse buckle 501 is connected with an electromagnetic control device 504; the wire harness electromagnetic control device 504 is connected with the whole vehicle HCU, and controls the clamping and fixing of the transverse buckle 501 according to the received signal.
The spring buckle is arranged inside the wire harness which is fixedly clamped with the transverse buckle 501, the electromagnetic control device 504 realizes the ejection of the wire harness through current control, namely the wire harness electromagnetic control device 504 can rapidly slide out the transverse buckle 501 along the direction of the inserted sliding rail, at the moment, the low-voltage wire harness connector 5 can drop downwards due to no fixation, two through holes are formed in the end plate 1 of the battery box body, and harmful gas is rapidly discharged.
The battery thermal runaway signal judging mechanism is that the harness terminal 503 on the low-voltage harness connector 5 is connected with the battery BMS system, and can receive the battery thermal runaway signal, and the battery thermal runaway signal comprises but is not limited to judging voltage abnormal change, current abnormal change, insulation resistance abnormal change and the like.
In summary, the signal modes of judging thermal runaway of the water inlet pipe joint 2, the water outlet pipe joint 3 and the low-voltage harness joint 5 are different, so that double-layer monitoring is realized, and harmful gas is prevented from being discharged in time due to failure of a single signal.
Example two
The present embodiment provides a battery assembly including the battery case end plate of the first embodiment. The battery assembly adopts the battery box end plate of the embodiment, judges thermal runaway through the water inlet pipe joint 2, the water outlet pipe joint 3 and the low-voltage beam joint 5, realizes double-layer monitoring, avoids harmful gas from being discharged in time because of failure of a single signal, solves the problem of explosion caused by incapability of rapidly discharging the gas due to overlarge internal pressure of a battery pack, promotes the gas discharging speed of the battery box, and promotes the safety performance of the battery assembly.
Example III
The present embodiment provides an electric vehicle including a battery assembly in the second embodiment. The electric vehicle adopts the battery assembly in the second embodiment, realizes double-layer monitoring, avoids the problem that harmful gas is not discharged in time because of single signal failure, solves the explosion problem caused by the fact that gas cannot be discharged rapidly because of overlarge internal pressure of a battery pack, and improves the gas discharge speed of a battery box body, thereby improving the safety of the electric vehicle.
Example IV
An exhaust method of a battery case end plate, implemented by a battery case end plate, comprising:
monitoring the harmful gas concentration signal inside the battery pack through the first smoke sensor 201 of the water inlet pipe 2 and transmitting the signal to the first electromagnetic control device 203; the first electromagnetic control device 203 determines a safety threshold according to the thermal runaway state of the battery module inside the battery pack, once the concentration of harmful gas exceeds the safety threshold, the first electromagnetic control device 203 controls the connection between the first connection male connector 202 and the quick water plugging pipe connector 4, namely, the first electromagnetic control device 203 rapidly pops up the quick water plugging pipe connectors 4 at two ends and disconnects the quick water plugging pipe connectors, thereby forming a through hole and rapidly discharging the harmful gas.
The first smoke sensor 201 may be replaced by a pressure sensor.
The second smoke sensor 301 of the water outlet pipe 3 monitors the harmful gas concentration signal inside the battery pack and transmits the signal to the first electromagnetic control device 303; the first electromagnetic control device 303 determines a safety threshold according to the thermal runaway state of the battery module inside the battery pack, and once the concentration of harmful gas exceeds the safety threshold, the second electromagnetic control device 303 controls the connection between the second connection male head 302 and the quick-connection water pipe connector 4, that is, the second electromagnetic control device 303 rapidly ejects and disconnects the quick-connection water pipe connectors 4 at two ends, thereby forming a through hole and rapidly discharging the harmful gas.
The second smoke sensor 301 may be replaced by a pressure sensor.
The signal received by the wire harness electromagnetic control device 504 of the low-voltage wire harness connector 5 controls the clamping and fixing of the transverse buckle 501, namely, the wire harness electromagnetic control device 504 can quickly slide out the transverse buckle 501 along the direction of the inserted sliding rail, at the moment, the low-voltage wire harness connector 5 can drop downwards due to no fixing, a through hole is formed in the end plate 1 of the battery box body, and harmful gas is quickly discharged.
In summary, the water inlet pipe joint 2 and the water outlet pipe joint 3 can pop up the connected quick water insertion pipe joint 4 after receiving the pop-up signal to form two gas channels, and when thermal runaway occurs in the battery pack and a large amount of high-pressure harmful gas is generated, the gas is quickly discharged through the two channels, so that the risk of bursting of the battery pack due to gas expansion is reduced; the low-voltage harness connector 5 can be opened by a fixed transverse buckle after receiving the flick signal, so that a gas channel is formed, and when thermal runaway occurs in the battery pack and a large amount of high-pressure harmful gas is generated, the gas is rapidly discharged through the two channels, so that the risk of bursting of the battery pack due to gas expansion is reduced. The battery thermal runaway signal judging mechanism is that the water inlet pipe joint 2 and the water outlet pipe joint 3 judge the concentration of harmful gas discharged by the battery pack according to the smoke sensor 201 arranged on the water inlet pipe joint and the water outlet pipe joint, and the concentration is quickly judged; the battery thermal runaway signal judging mechanism is that the harness terminal 503 on the low-voltage harness connector 5 is connected with a battery BMS system, and can receive the battery thermal runaway signal, and the method comprises the steps of, but is not limited to, judging abnormal voltage change, abnormal current change, abnormal insulation resistance change and the like; the water inlet pipe joint 2, the water outlet pipe joint 3 and the low-voltage wire harness joint 5 are different in signal mode for judging thermal runaway, double-layer monitoring is achieved, and harmful gas is prevented from being timely discharged due to failure of a single signal.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the application. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the application can be made without departing from the spirit of the application, which should also be considered as disclosed herein.
The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings, but the scope of the present application is not limited to the specific details of the above embodiments, and within the scope of the technical concept of the present application, any person skilled in the art may apply equivalent substitutions or alterations to the technical solution according to the present application and the inventive concept thereof within the scope of the technical concept of the present application, and these simple modifications are all within the scope of the present application.
Claims (7)
1. The battery box end plate is characterized by comprising a battery box end plate body (1), a water inlet pipe joint (2), a water outlet pipe joint (3), a quick water pipe joint (4), a low-voltage harness joint (5) and a high-voltage joint (6); the battery box end plate body (1) is arranged at the front end of the battery lower box body; the water inlet pipe joint (2) and the water outlet pipe joint (3) are fixed on the battery box end plate body (1); the water inlet pipe joint (2) and the water outlet pipe joint (3) are both fixed on the battery box end plate body (1); both ends of the water inlet pipe joint (2) and the water outlet pipe joint (3) are connected with one end of the quick-plugging water pipe joint (4); the other end of the quick water pipe joint (4) is connected with a water pipe; the low-voltage harness connector (5) is fixed on the battery box end plate body (1), one end inside the battery pack is connected with the battery BMS system, and one end outside the battery pack is connected with the whole vehicle HCU; the high-voltage connector (6) is fixed on the battery box end plate body (1), one end of the high-voltage connector is connected with a high-voltage wire inside the battery pack, and the other end of the high-voltage connector is connected with a high-voltage wire outside the battery pack;
the water inlet pipe joint (2) comprises a first smoke sensor (201), two first connecting male heads (202), two first electromagnetic control devices (203) and two first through pipelines (204); the first smoke sensor (201) is connected with two first electromagnetic control devices (203); the two first electromagnetic control devices (203) are connected with the two first connecting male heads (202) through two first straight pipelines (204); the two first connecting male connectors (202) are connected with the quick water pipe connector (4); the first smoke sensor (201) is used for monitoring a harmful gas state signal inside the battery pack; the first electromagnetic control device (203) receives a harmful gas state signal in the battery pack monitored by the first smoke sensor (201) and controls the connection of the first connection male head (202) and the quick-connection water pipe joint (4);
the water outlet pipe joint (3) comprises a second smoke sensor (301), two second connecting male heads (302), two second electromagnetic control devices (303) and two second straight-through pipelines (304); the smoke sensor (301) is connected with two second electromagnetic control devices (303); the two second electromagnetic control devices (303) are connected with the two second connecting male heads (302) through two second straight-through pipelines (304); the two second connecting male heads (302) are connected with the quick water pipe connector (4); the second smoke sensor (301) is used for monitoring a harmful gas state signal inside the battery pack; the second electromagnetic control device (303) receives a harmful gas state signal in the battery pack monitored by the second smoke sensor (301) and controls the connection of the second connection male head (302) and the quick-connection water pipe joint (4);
the low-voltage wire harness connector (5) comprises a transverse buckle (501), a wire harness connector (502), a wire harness terminal (503) and a wire harness electromagnetic control device (504); the low-voltage harness connector (5) is clamped and fixed on the battery box end plate body (1) through a transverse buckle (501); the front end of the transverse buckle (501) is fixed with a wire harness connector (502); a harness terminal (503) is arranged on the harness connector (502); the harness terminal (503) is connected to a battery BMS system; the transverse buckle (501) is connected with the electromagnetic control device (504); the wire harness electromagnetic control device (504) is connected with the whole vehicle HCU and is used for controlling the clamping and fixing of the transverse buckle (501) according to the received signal.
2. The battery box end plate according to claim 1, wherein the straight hole channel length of the inside of the water inlet pipe joint (2) and the water outlet pipe joint (3) is more than or equal to 200mm.
3. A battery assembly comprising a battery case end plate according to any one of claims 1-2.
4. An electric vehicle comprising a battery assembly according to claim 3.
5. A method of venting a battery case end plate, achieved by a battery case end plate as claimed in claim 1, comprising:
monitoring a harmful gas concentration signal inside the battery pack through a first smoke sensor (201) of the water inlet pipe joint (2) and transmitting the signal to a first electromagnetic control device (203); the first electromagnetic control device (203) determines a safety threshold according to the thermal runaway state of the battery module in the battery pack, and once the concentration of harmful gas exceeds the safety threshold, the first electromagnetic control device (203) controls the connection of the first connecting male connector (202) and the quick water plugging pipe connectors (4), namely the quick water plugging pipe connectors (4) at two ends are quickly ejected by the first electromagnetic control device (203) to disconnect, so that a through hole is formed and the harmful gas is quickly discharged;
monitoring a harmful gas concentration signal inside the battery pack through a second smoke sensor (301) of the water outlet pipe joint (3) and transmitting the signal to a second electromagnetic control device (303); the second electromagnetic control device (303) determines a safety threshold according to the thermal runaway state of the battery module in the battery pack, once the concentration of harmful gas exceeds the safety threshold, the second electromagnetic control device (303) controls the connection of the second connecting male head (302) and the quick water plugging pipe joint (4), namely the quick water plugging pipe joints (4) at two ends are quickly ejected by the second electromagnetic control device (303) to disconnect, so that a through hole is formed, and the harmful gas is quickly discharged;
the signal that pencil electromagnetic control device (504) through low pressure pencil connects (5) received, the joint of control transverse buckle (501) is fixed, pencil electromagnetic control device (504) can be with transverse buckle (501) quick roll-off along male slide rail direction promptly, and at this moment, low pressure pencil connects (5) owing to not fixing, just can drop down, will form a through-hole on battery box end plate body (1), the quick harmful gas of discharging.
6. The method of exhausting a battery box end plate of claim 5, wherein said safety threshold is twice the normal value of the gas.
7. The method for exhausting an end plate of a battery box according to claim 5, wherein the signal received by the electromagnetic control device (504) of the wire harness includes an abnormal change in voltage, an abnormal change in current, and an abnormal change in insulation resistance.
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| CN202111447416.4A CN114284630B (en) | 2021-11-30 | 2021-11-30 | Battery box end plate, battery assembly, electric vehicle and exhaust control method |
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| CN114284630B true CN114284630B (en) | 2023-11-14 |
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| CN114284630A (en) | 2022-04-05 |
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