CN113119707B - Locking mechanism for battery pack, quick-change bracket assembly and electric automobile - Google Patents
Locking mechanism for battery pack, quick-change bracket assembly and electric automobile Download PDFInfo
- Publication number
- CN113119707B CN113119707B CN201911415797.0A CN201911415797A CN113119707B CN 113119707 B CN113119707 B CN 113119707B CN 201911415797 A CN201911415797 A CN 201911415797A CN 113119707 B CN113119707 B CN 113119707B
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- battery pack
- locking mechanism
- locking
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- 230000007246 mechanism Effects 0.000 title claims abstract description 77
- 238000005452 bending Methods 0.000 claims description 39
- 238000009434 installation Methods 0.000 description 16
- 230000008859 change Effects 0.000 description 14
- 230000002349 favourable effect Effects 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000021252 tongue development Effects 0.000 description 1
Classifications
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/80—Exchanging energy storage elements, e.g. removable batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
- B60S5/00—Servicing, maintaining, repairing, or refitting of vehicles
- B60S5/06—Supplying batteries to, or removing batteries from, vehicles
-
- 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
- B60K2001/0455—Removal or replacement of the energy storages
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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
- 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
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Power Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a locking mechanism for a battery pack, a quick-change bracket assembly and an electric automobile. The locking mechanism comprises a lock base and a lock tongue, wherein the lock base is provided with an opening and a cavity, and the opening is used for allowing a lock shaft of the battery pack to enter the cavity; the locking bolt is rotatable relative to the lock base to switch between an unlocked state and a locked state. The lock tongue comprises a lock tongue body, a first lock tongue expansion part and a second lock tongue expansion part which are sequentially connected end to end, when the lock tongue is in a locking state, the lock tongue body can prevent a lock shaft from leaving a cavity, the lock tongue body is positioned in a lock base, and the first and second lock tongue expansion parts are positioned outside the lock base. Along the thickness direction of lock base, the first spring bolt expansion portion extends out of at least one end of second spring bolt expansion portion. The contact area of the lock tongue and the positioning fork is increased by the second lock tongue expanding part, the possibility that the positioning fork is misplaced relative to the lock tongue can be reduced, and the positioning fork is not easy to fork into side seams at two sides of the lock tongue, so that the success rate of primary power exchange can be improved.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a locking mechanism for a battery pack, a quick-change bracket assembly and an electric automobile.
Background
The locking mechanism is installed on the quick-change bracket, and is an important structure for installing the battery pack on the quick-change bracket. The locking mechanism comprises a lock base and a lock tongue, and when the power is replaced, a positioning fork on the power replacing equipment is matched with the lock tongue so as to unlock the locking mechanism. For the locking mechanism in the prior art, the positioning fork is matched with the arc area when matched with the lock tongue, the actual contact surface is smaller, and the positioning fork is easy to misplace relative to the lock tongue in the power conversion process, so that the positioning fork is easy to fork into side seams on two sides of the lock tongue (one side seam is formed by the lock tongue and a battery pack, and the other side seam is formed by the lock tongue and a quick-change bracket), and the power conversion success rate is affected once.
In summary, the locking mechanism in the prior art has the defect that the locking bolt is easy to be misplaced with the positioning fork when being matched with the positioning fork, so that the success rate of primary power conversion is affected.
Disclosure of Invention
The invention aims to overcome the defect that the success rate of primary power conversion is influenced due to the fact that a locking mechanism in the prior art is easy to misplace with a positioning fork when a locking bolt is matched with the positioning fork, and provides a locking mechanism for a battery pack, a quick-change bracket assembly and an electric automobile.
The invention solves the technical problems by the following technical scheme:
A locking mechanism for a battery pack, comprising a lock base and a locking tongue, the lock base having an opening for a lock shaft mounted to the battery pack to enter the cavity, and a cavity extending from the opening; the lock tongue can rotate relative to the lock base to switch between an unlocking state and a locking state, and is characterized by comprising a lock tongue body, a first lock tongue expansion part and a second lock tongue expansion part which are sequentially connected end to end, wherein when the lock tongue is in the locking state, the lock tongue body can prevent the lock shaft from leaving the cavity from the opening, the lock tongue body is positioned in the lock base, and the first lock tongue expansion part and the second lock tongue expansion part are positioned outside the lock base;
and at least one end of the second lock tongue expanding part extends out of the first lock tongue expanding part along the thickness direction of the lock base.
In this scheme, the second spring bolt extends first spring bolt expansion portion, when needs change the electricity, second spring bolt expansion portion cooperates with the location fork, compares in prior art, the part that extends first spring bolt expansion portion in the second spring bolt expansion portion has increased the area of contact of spring bolt and location fork to can reduce the dislocation of location fork emergence for the spring bolt possibility, make the location fork be difficult for fork to the side seam that spring bolt and battery package and/or quick change support formed in, consequently, can improve the success rate of once changing the electricity.
Preferably, the second tongue extension extends up to alignment with the outer edge of the lock base along the thickness direction of the lock base.
In this aspect, one side of the lock base (hereinafter, referred to as a "first side") is for mounting to the quick-change bracket, and the other side of the lock base (hereinafter, referred to as a "second side") is for facing the battery pack. If the second bolt expanding part corresponding to the first side surface extends out of the first side surface, the space occupied by the locking mechanism is larger by the second bolt expanding part, and the installation of the lock base and the quick-change bracket is also easily affected by the second bolt expanding part. If the second bolt expanding part corresponding to the second side surface extends out of the second side surface, the second bolt expanding part can enable the space occupied by the locking mechanism to be larger, and the second bolt expanding part also easily clamps the battery pack, so that the success rate of power conversion can be affected.
Preferably, along the thickness direction of the lock base, two ends of the second bolt expanding portion extend out of the first bolt expanding portion.
In this scheme, adopt above-mentioned structure setting, when locking mechanism and location fork cooperation, compare in prior art, both ends that the second spring bolt extended the portion all have great area of contact with the location fork to can further make location fork be difficult for taking place the dislocation with the second spring bolt extended the portion, the location fork is difficult for forking in the side seam of spring bolt both sides, is favorable to further improving the success rate of once changing the electricity.
Preferably, the parts extending out of the first bolt expanding part in the two ends of the second bolt expanding part are a first extending part and a second extending part respectively, and the cross section shapes of the first extending part and the second extending part are the same.
In the scheme, the first extension part and the second extension part are identical to the positioning fork in cross section shape when being matched with the positioning fork, so that the requirements on the positioning fork are reduced, the positioning fork and the second spring bolt expanding part are matched reliably, and accordingly, the success rate of power change is improved.
Preferably, the first extension portion and the second extension portion are symmetrically disposed about a central axis of the first tongue extension portion.
In this scheme, adopt above-mentioned structure setting, be favorable to further reducing the requirement to the location fork, and then be favorable to guaranteeing the reliable cooperation of location fork and second spring bolt expansion portion, be favorable to further improving the success rate of changing the electricity.
Preferably, one end of the second bolt expanding portion, which is far away from the first bolt expanding portion, is an arc portion, and the arc portions are uniformly distributed along the thickness direction of the lock base.
In the scheme, the structure is adopted, the part, extending out of the first bolt expanding part, of the second bolt expanding part and the part corresponding to the first bolt expanding part are the same arc-shaped part, so that the matching surface of the second bolt expanding part and the locating fork is identical along the thickness direction of the lock base, the requirement on the locating fork is reduced, the matching reliability of the locating fork and the second bolt expanding part is improved, and the success rate of primary power change is improved.
Preferably, one end of the second bolt expanding portion, which is close to the first bolt expanding portion, is of a planar structure.
Preferably, the first bolt expanding portion and the second bolt expanding portion are integrally formed.
In this scheme, adopt above-mentioned structure setting, the shaping mode of spring bolt is comparatively simple, and need not extra indirect structure or connected mode between first spring bolt expansion portion and the second spring bolt expansion portion and just can realize reliable joint, has both improved the reliability of spring bolt, has reduced space and the whole weight that locking mechanism occupy again.
Preferably, when the lock tongue is in the locking state, a lowest point of one end of the second lock tongue expansion part, which is far away from the first lock tongue expansion part, is located above a lowest point of the lock tongue body, or the lowest point of one end of the second lock tongue expansion part, which is far away from the first lock tongue expansion part, is located on the same horizontal line as the lowest point of the lock tongue body.
In the scheme, if the lowest point of the second lock tongue expansion part is too low, the positioning fork is matched with the second lock tongue expansion part, so that when the positioning fork acts on the second lock tongue expansion part to unlock the battery pack, the movement stroke of the lock tongue is too large, the unlocking can take longer, and the power conversion efficiency is easily affected.
Preferably, the first bolt expansion part is of a bending structure and comprises a first bending part and a second bending part, the first bending part is connected between the bolt body and the second bending part, and one end, far away from the first bending part, of the second bending part is connected with the second bolt expansion part.
In this scheme, adopt above-mentioned structure setting, the lock base can realize the spacing to the spring bolt through the cooperation with first kink, prevents that the spring bolt from continuing rotatory along the locking direction.
Preferably, when the lock tongue body is in the locking state, the first bending part is attached to the top of the lock base, the second bending part extends along the side wall of the lock base, a gap is formed between the second bending part and the side wall of the lock base, and the range of the gap is 0-5 mm.
In this scheme, the clearance that forms between the lateral wall of second kink and lock base is favorable to preventing the spring bolt by lock base blocking, is favorable to further improving the reliability of trading the electricity. If the gap is too large, the locking mechanism occupies a larger space, so that the space utilization rate of the quick-change bracket is lower. In addition, the space on the quick-change bracket is limited, if the space occupied by a single locking structure is more, the installation of other structures (such as a positioning mechanism for positioning a battery pack) or the installation quantity of the locking mechanisms can be influenced, so that the installation reliability of the battery pack is likely to be reduced, and the success rate of power change can be influenced. It should be noted that, the space occupied by the locking mechanism is larger, which also makes the size of the positioning fork matched with the locking mechanism larger.
Preferably, an included angle is formed between the first bending part and the second bending part, and the included angle is greater than or equal to 90 degrees and smaller than 180 degrees.
Preferably, the locking mechanism further includes a reset component, two ends of the reset component are respectively connected to the lock base and the first lock tongue expanding portion, and the reset component can be elastically deformed, so that the lock tongue rotates along the locking direction to reset from the unlocking state to the locking state.
In this scheme, set up reset means and be convenient for the spring bolt to reset to the locking state from the unblock state for battery package installation, locking are all comparatively convenient, and under reset means's effect, the spring bolt can not change into the unblock state easily, and the locking is more reliable.
Preferably, the locking mechanism further comprises a resilient member located at least partially within the cavity;
The elastic part comprises an elastic pad, an elastic handle and an elastic head which are sequentially connected, the elastic pad is located in the cavity and is used for being abutted against the lock shaft, the elastic handle penetrates through the lock base, and the wall portion of the lock base is clamped between the elastic pad and the elastic head.
In this scheme, adopt above-mentioned structure setting, the elastic pad can prevent lock axle and lock base rigidity striking, and in addition, the elastic component can install in lock base firmly. Among them, the elastic member is preferably made of rubber.
The invention also provides a quick-change bracket assembly, which comprises a quick-change bracket and is characterized by further comprising at least one locking mechanism for the battery pack, wherein the locking mechanism is connected to the inner side wall of the quick-change bracket.
Preferably, when the latch bolt body is in the locked state, along the thickness direction of the latch base, a gap between an end of the second latch bolt expansion portion adjacent to the quick-change bracket and an inner side wall of the quick-change bracket is greater than 0mm and less than or equal to 3mm, and a gap between an end of the second latch bolt expansion portion adjacent to the battery pack and an outer side wall of the battery pack is greater than 0mm and less than or equal to 3mm.
In this scheme, adopt above-mentioned structure setting, when location fork and locking mechanism cooperation, second spring bolt expansion portion can prevent comparatively reliably that location fork and spring bolt from taking place the dislocation, can not influence the installation of locking mechanism and quick change support again, also can not influence the installation of battery package.
Preferably, the quick-change bracket is provided with two connecting beams which are oppositely arranged, the number of the locking mechanisms is two, and the two locking mechanisms are oppositely arranged and respectively arranged on the inner side walls of the two connecting beams.
In this scheme, the both sides of battery package are provided with locking mechanism relatively, are favorable to guaranteeing steady, the reliable installation of battery package, and then are favorable to improving the success rate of trading the electricity.
The invention also provides an electric automobile which is characterized by comprising the quick-change bracket assembly.
On the basis of conforming to the common knowledge in the field, the above preferred conditions can be arbitrarily combined to obtain the preferred examples of the invention.
The invention has the positive progress effects that:
in the locking mechanism, the first bolt expansion part is extended from the second bolt expansion part, and when the power needs to be replaced, the second bolt expansion part is matched with the positioning fork, compared with the prior art, the contact area between the bolt and the positioning fork is increased by the part extending out of the first bolt expansion part in the second bolt expansion part, so that the possibility that the positioning fork is misplaced relative to the bolt can be reduced, the positioning fork is not easy to fork into a side seam formed by the bolt, a battery pack and/or a quick-change bracket, and therefore the success rate of primary power replacement can be improved.
Drawings
Fig. 1 is a schematic structural view of a locking mechanism for a battery pack according to a preferred embodiment of the present invention.
Fig. 2 is another structural schematic view of a locking mechanism for a battery pack according to a preferred embodiment of the present invention.
Fig. 3 is a schematic view showing a part of the structure of the locking mechanism for the battery pack according to a preferred embodiment of the present invention, in which the second tongue extension is not shown.
Fig. 4 is a schematic view showing a structure of a locking mechanism for a battery pack according to a preferred embodiment of the present invention when the locking mechanism is engaged with a locking fork.
Fig. 5 is a schematic structural view of a tongue in a locking mechanism for a battery pack according to a preferred embodiment of the present invention.
Reference numerals illustrate:
10. Lock base
101. An opening
102. Cavity cavity
20. Spring bolt
201. Spring bolt body
202. First spring bolt expansion part
203. Second spring bolt expansion part
204. First extension part
205. Second extension part
206. First bending part
207. Second bending part
30. Reset component
40. Elastic component
401. Elastic cushion
402. Elastic handle
403. Elastic head
50. Positioning fork
Detailed Description
The invention will be further illustrated by way of example with reference to the accompanying drawings, without thereby limiting the scope of the invention to the examples described below.
The present embodiment discloses a locking mechanism for a battery pack, as shown in fig. 1-5, the locking mechanism comprising a lock base 10 and a locking tongue 20, the lock base 10 having an opening 101 and a cavity 102 extending from the opening 101, the opening 101 for a lock shaft mounted to the battery pack to enter the cavity 102; the tongue 20 is rotatable relative to the lock base 10 to switch between an unlocked state and a locked state. The lock tongue 20 comprises a lock tongue body 201, a first lock tongue expansion part 202 and a second lock tongue expansion part 203 which are sequentially connected end to end, when the lock tongue 20 is in a locking state, the lock tongue body 201 can prevent a lock shaft from leaving the cavity 102 from the opening 101, the lock tongue body 201 is positioned in the lock base 10, and the first lock tongue expansion part 202 and the second lock tongue expansion part 203 are positioned outside the lock base 10. Wherein, along the thickness direction of the lock base 10, at least one end of the second latch expansion portion 203 extends out of the first latch expansion portion 202.
In this embodiment, the second bolt expanding portion 203 extends out of the first bolt expanding portion 202, when the power needs to be replaced, the second bolt expanding portion 203 is matched with the positioning fork 50, compared with the prior art, the contact area between the bolt 20 and the positioning fork 50 is increased by the portion of the second bolt expanding portion 203 extending out of the first bolt expanding portion 202, so that the possibility that the positioning fork 50 is misplaced relative to the bolt 20 can be reduced, the positioning fork 50 is not easy to fork into a side seam formed by the bolt 20, a battery pack and/or a quick-change bracket, and therefore the success rate of one-time power replacement can be improved. It should be noted that, with the above structure, even if the positioning fork 50 is dislocated to a certain extent relative to the second bolt expanding portion 203, the positioning fork 50 is not easy to fork into the side seam of the bolt 20 and the battery including or quick-change bracket under the action of the portion of the second bolt expanding portion 203 extending out of the first bolt expanding portion 202.
In the present embodiment, as will be understood with reference to fig. 1 to 5, along the thickness direction of the lock base 10, both ends of the second tongue extension 203 extend out of the first tongue extension 202.
When the locking mechanism is matched with the positioning fork 50, compared with the prior art, both ends of the second lock tongue expansion part 203 have larger contact areas with the positioning fork 50, so that the positioning fork 50 is not easy to misplace with the second lock tongue expansion part 203, the positioning fork 50 is not easy to fork into side seams at both sides of the lock tongue 20, and the success rate of primary power exchange is further improved.
As will be further understood with reference to fig. 1-5, the portions of the two ends of the second latch bolt expansion portion, from which the first latch bolt expansion portion 202 extends, are a first extension portion 204 and a second extension portion 205, respectively, and the cross-sectional shapes of the first extension portion 204 and the second extension portion 205 are the same. By means of the arrangement, the first extension part 204 and the second extension part 205 are identical in cross section shape when being matched with the positioning fork 50, requirements on the positioning fork 50 are reduced, reliable matching of the positioning fork 50 and the second lock tongue expanding part 203 is facilitated, and accordingly, the success rate of power change is improved.
In fact, in the present embodiment, the first extension 204 and the second extension 205 are symmetrically disposed about the central axis of the first tongue extension 202. The arrangement is beneficial to further reducing the requirement on the positioning fork 50, further beneficial to ensuring the reliable matching of the positioning fork 50 and the second lock tongue expanding part 203, and beneficial to further improving the success rate of power change.
It should be noted that, in other alternative embodiments, the first extension portion 204 and the second extension portion 205 may be configured with different cross-sectional shapes, or the first extension portion 204 and the second extension portion 205 may have the same cross-sectional shape but different sizes, that is, may not be symmetrically disposed about the central axis of the first tongue extension 202.
Regarding the extension range of the second tongue extension 203, this embodiment is set as: along the thickness direction of the lock base 10, the second tongue development 203 extends up to be aligned with the outer edge of the lock base 10.
Wherein one side of the lock base 10 (hereinafter, referred to as a "first side") is for being mounted to the quick-change bracket, and the other side of the lock base 10 (hereinafter, referred to as a "second side") is for being directed toward the battery pack. If the second bolt expanding portion 203 corresponding to the first side extends out of the first side, the space occupied by the locking mechanism by the second bolt expanding portion 203 is larger, and the installation of the lock base 10 and the quick-change bracket is also easily affected by the second bolt expanding portion 203. If the second bolt expanding portion 203 corresponding to the second side extends out of the second side, the space occupied by the locking mechanism by the second bolt expanding portion 203 is larger, and the battery pack is easy to be clamped by the second bolt expanding portion 203, so that the success rate of power change can be affected.
As will be further understood with reference to fig. 1-5, the end of the second tongue extension 203, which is far away from the first tongue extension 202, is an arc portion, and the arc portions are uniformly distributed along the thickness direction of the lock base 10.
By the arrangement, the part of the second bolt expanding part 203, from which the first bolt expanding part 202 extends, and the part corresponding to the first bolt expanding part 202 are the same arc-shaped parts, so that the matching surfaces of the second bolt expanding part 203 and the locating fork 50 are identical along the thickness direction of the lock base 10, the requirement on the locating fork 50 is reduced, the matching reliability of the locating fork 50 and the second bolt expanding part 203 is improved, and the success rate of primary power change is improved.
Specifically, in the present embodiment, one end of the second tongue extension 203, which is close to the first tongue extension 202, is a planar structure.
In the present embodiment, the first tongue extension 202 and the second tongue extension 203 are integrally formed. By the arrangement, the forming mode of the lock tongue 20 is simpler, and reliable joint can be realized without an additional indirect structure or connection mode between the first lock tongue expansion part 202 and the second lock tongue expansion part 203, so that the reliability of the lock tongue 20 is improved, and the space occupied by the locking mechanism and the whole weight are reduced.
It should be noted that, in other alternative embodiments, the first latch expansion portion 202 and the second latch expansion portion 20 may be connected together by a connection structure, which may be configured to be detachably connected (e.g. by a screw, a nut, etc.) or configured to be fixedly connected (e.g. welded).
Further, in the present embodiment, when the lock tongue 20 is in the locked state, the lowest point of the end of the second lock tongue expansion portion 203 away from the first lock tongue expansion portion 202 is located above the lowest point of the lock tongue body 201. In other alternative embodiments, it may also be provided that: the lowest point of the end, far away from the first bolt expanding part 202, of the second bolt expanding part 203 is in the same horizontal line with the lowest point of the bolt body 201.
If the lowest point of the second lock tongue expansion portion 203 is too low, the positioning fork 50 is matched with the second lock tongue expansion portion 203, so that when the positioning fork 50 acts on the second lock tongue expansion portion 203 to unlock the battery pack, the movement stroke of the lock tongue 20 is too large, so that the unlocking needs a longer time, and the power conversion efficiency is easily affected.
As shown in fig. 1-5, the first locking bolt expansion portion 202 is of a bending structure and includes a first bending portion 206 and a second bending portion 207, the first bending portion 206 is connected between the locking bolt body 201 and the second bending portion 207, and one end of the second bending portion 207 away from the first bending portion 206 is connected to the second locking bolt expansion portion 203. When the lock tongue body 201 is in the locked state, the first bending portion 206 is attached to the top of the lock base 10, the second bending portion 207 extends along the sidewall of the lock base 10, and a gap is formed between the second bending portion 207 and the sidewall of the lock base 10, and the gap ranges from 0mm to 5mm.
The lock base 10 is capable of limiting the lock tongue 20 through cooperation with the first bending portion 206, so as to prevent the lock tongue 20 from continuing to rotate along the locking direction. The gap formed between the second bending portion 207 and the side wall of the lock base 10 is beneficial to preventing the lock tongue 20 from being blocked by the lock base 10, and is beneficial to further improving the reliability of power exchange.
It is to be noted that, as described above, the gap is preferably set to not more than 5mm. If the gap is too large, the locking mechanism occupies a large space, so that the space utilization rate of the quick-change bracket is low. In addition, the space on the quick-change bracket is limited, if the space occupied by a single locking structure is more, the installation of other structures (such as a positioning mechanism for positioning a battery pack) or the installation quantity of the locking mechanisms can be influenced, so that the installation reliability of the battery pack is likely to be reduced, and the success rate of power change can be influenced. It should be noted that, the larger space occupied by the locking mechanism also makes the size of the positioning fork 50 engaged with the locking mechanism larger.
As will be understood with reference to fig. 1-4, the first bending portion 206 and the second bending portion 207 form an included angle therebetween, which is 90 degrees in this embodiment. In other alternative embodiments, the included angle may take any value greater than 90 degrees and less than 180 degrees. In other alternative embodiments, the surface of the second bending portion 207 contacting the lock base 10 is a cambered surface.
As shown in fig. 1 to 4, the locking mechanism further includes a reset component 30, two ends of the reset component 30 are respectively connected to the lock base 10 and the first latch expansion portion 202, and the reset component 30 can be elastically deformed, so that the latch 20 rotates along the locking direction to reset from the unlocked state to the locked state. Wherein, set up reset part 30 and be convenient for spring bolt 20 reset to the locking state from the unblock state for battery package installation, locking are all comparatively convenient, and under reset part 30's effect, spring bolt 20 can not change easily to the unblock state, and the locking is more reliable.
Still further, as shown in FIG. 3, the locking mechanism further includes a resilient member 40, the resilient member 40 being at least partially disposed within the cavity 102. The elastic component 40 includes an elastic pad 401, an elastic handle 402, and an elastic head 403, where the elastic pad 401 is located in the cavity 102, the elastic pad 401 is used to abut against the lock shaft, the elastic handle 402 is disposed through the lock base 10, and a wall portion of the lock base 10 is clamped between the elastic pad 401 and the elastic head 403. The elastic pad 401 can prevent the lock shaft from rigidly striking the lock base 10, and in addition, the elastic member 40 can be stably mounted to the lock base 10. Among them, the elastic member 40 is preferably made of rubber.
The embodiment also discloses a quick-change bracket assembly, which comprises a quick-change bracket (not shown in the figure) and at least one locking mechanism, wherein the locking mechanism is connected to the inner side wall of the quick-change bracket.
When the lock tongue body 201 is in the locked state, along the thickness direction of the lock base 10, a gap between one end of the second lock tongue expansion portion 203 adjacent to the quick-change bracket and the inner side wall of the quick-change bracket is greater than 0mm and less than or equal to 3mm, and a gap between one end of the second lock tongue expansion portion 203 adjacent to the battery pack and the outer side wall of the battery pack is greater than 0mm and less than or equal to 3mm.
In this scheme, adopt above-mentioned structure setting, when location fork 50 and locking mechanism cooperation, second spring bolt expansion portion 203 can prevent comparatively reliably that location fork 50 and spring bolt 20 from taking place the dislocation, can not influence the installation of locking mechanism and quick change support again, can not influence the installation of battery package yet.
The quick-change bracket is provided with two connecting beams which are oppositely arranged, the number of the locking mechanisms is two, and the two locking mechanisms are oppositely arranged and are respectively arranged on the inner side walls of the two connecting beams. In this embodiment, the both sides of battery package are provided with locking mechanism relatively, are favorable to guaranteeing steady, the reliable installation of battery package, and then are favorable to improving the success rate of trading the electricity.
It should be noted that, in the quick-change bracket assembly, the locking mechanism can be used as a secondary lock and a primary lock in a cooperative manner; the primary lock can refer to a locking device disclosed in Chinese patent application publication No. CN 106427514A.
The embodiment also discloses an electric automobile, which comprises the quick-change bracket component.
In the locking mechanism, the second bolt expanding part 203 extends out of the first bolt expanding part 202, when the power needs to be replaced, the second bolt expanding part 203 is matched with the positioning fork 50, compared with the prior art, the contact area between the bolt 20 and the positioning fork 50 is increased by the part of the second bolt expanding part 203 extending out of the first bolt expanding part 202, so that the possibility that the positioning fork 50 is misplaced relative to the bolt 20 can be reduced, the positioning fork 50 is not easy to fork into a side seam formed by the bolt 20, a battery pack and a quick-change bracket, and the success rate of one-time power replacement can be improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (16)
1. A locking mechanism for a battery pack, comprising a lock base and a locking tongue, the lock base having an opening for a lock shaft mounted to the battery pack to enter the cavity, and a cavity extending from the opening; the lock tongue can rotate relative to the lock base to switch between an unlocking state and a locking state, and is characterized by comprising a lock tongue body, a first lock tongue expansion part and a second lock tongue expansion part which are sequentially connected end to end, wherein when the lock tongue is in the locking state, the lock tongue body can prevent the lock shaft from leaving the cavity from the opening, the lock tongue body is positioned in the lock base, and the first lock tongue expansion part and the second lock tongue expansion part are positioned outside the lock base;
wherein, along the thickness direction of the lock base, at least one end of the second lock tongue expansion part extends out of the first lock tongue expansion part;
the first bolt expanding part and the second bolt expanding part are integrally formed;
The first bolt expanding part is of a bending structure and comprises a first bending part and a second bending part, the first bending part is connected between the bolt body and the second bending part, and one end, far away from the first bending part, of the second bending part is connected with the second bolt expanding part;
when the lock tongue body is in the locking state, the first bending part is attached to the top of the lock base, and the second bending part extends along the side wall of the lock base.
2. The locking mechanism for a battery pack as recited in claim 1, wherein said second latch extension extends up to alignment with an outer edge of said latch base along a thickness direction of said latch base.
3. The locking mechanism for a battery pack as recited in claim 1, wherein said first latch tab extension extends from both ends of said second latch tab extension in a thickness direction of said lock base.
4. The locking mechanism for a battery pack as recited in claim 3, wherein the portions of the two ends of the second tongue extension from which the first tongue extension extends are respectively a first extension and a second extension, and the first extension and the second extension have the same cross-sectional shape.
5. The locking mechanism for a battery pack of claim 4, wherein the first extension and the second extension are symmetrically disposed about a central axis of the first latch extension.
6. The locking mechanism for a battery pack as recited in claim 1, wherein an end of the second latch development portion remote from the first latch development portion is an arc portion, and the arc portions are uniformly distributed along a thickness direction of the lock base.
7. The locking mechanism for a battery pack as recited in claim 1, wherein an end of said second latch extension adjacent said first latch extension is planar.
8. The locking mechanism for a battery pack as recited in claim 1, wherein when the locking tongue is in the locked state, a lowest point of an end of the second locking tongue extension away from the first locking tongue extension is located above a lowest point of the locking tongue body, or a lowest point of an end of the second locking tongue extension away from the first locking tongue extension is located on a same horizontal line as a lowest point of the locking tongue body.
9. The locking mechanism for a battery pack as claimed in claim 1, wherein a gap is formed between the second bending portion and a side wall of the lock base, and the gap ranges from 0 to 5mm.
10. The locking mechanism for a battery pack as recited in claim 1, wherein an included angle is formed between said first bent portion and said second bent portion, and said included angle is greater than or equal to 90 degrees and less than 180 degrees.
11. The locking mechanism for a battery pack as recited in claim 1, further comprising a return member having opposite ends connected to said lock base and said first tongue extension, respectively, said return member being elastically deformable for rotating said tongue in a locking direction to return from said unlocked state to said locked state.
12. The locking mechanism for a battery pack as recited in any one of claims 1-11, wherein said locking mechanism further comprises a resilient member at least partially within said cavity;
The elastic part comprises an elastic pad, an elastic handle and an elastic head which are sequentially connected, the elastic pad is located in the cavity and is used for being abutted against the lock shaft, the elastic handle penetrates through the lock base, and the wall portion of the lock base is clamped between the elastic pad and the elastic head.
13. A quick-change bracket assembly comprising a quick-change bracket, wherein the quick-change bracket assembly further comprises at least one locking mechanism for a battery pack as recited in any one of claims 1-12, the locking mechanism being coupled to an inner sidewall of the quick-change bracket.
14. The quick-change bracket assembly of claim 13, wherein, when the latch body is in the latched state, a gap between an end of the second latch expansion adjacent to the quick-change bracket and an inner side wall of the quick-change bracket is greater than 0mm and less than or equal to 3mm, and a gap between an end of the second latch expansion adjacent to the battery pack and an outer side wall of the battery pack is greater than 0mm and less than or equal to 3mm, along a thickness direction of the latch base.
15. The quick-change bracket assembly of claim 13, wherein the quick-change bracket has two oppositely disposed connecting beams, and the number of locking mechanisms is two, and the two locking mechanisms are oppositely disposed and respectively disposed on the inner side walls of the two connecting beams.
16. An electric vehicle comprising a quick-change bracket assembly according to any one of claims 13-15.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415797.0A CN113119707B (en) | 2019-12-31 | 2019-12-31 | Locking mechanism for battery pack, quick-change bracket assembly and electric automobile |
| PCT/CN2020/140684 WO2021136237A1 (en) | 2019-12-31 | 2020-12-29 | Locking mechanism for battery pack, quick-swap support assembly, and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911415797.0A CN113119707B (en) | 2019-12-31 | 2019-12-31 | Locking mechanism for battery pack, quick-change bracket assembly and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113119707A CN113119707A (en) | 2021-07-16 |
| CN113119707B true CN113119707B (en) | 2024-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911415797.0A Active CN113119707B (en) | 2019-12-31 | 2019-12-31 | Locking mechanism for battery pack, quick-change bracket assembly and electric automobile |
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| Country | Link |
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| CN (1) | CN113119707B (en) |
| WO (1) | WO2021136237A1 (en) |
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| CN113696706A (en) * | 2021-08-27 | 2021-11-26 | 安徽江淮汽车集团股份有限公司 | Quick change mechanism for liquid cooling battery pack |
| CN217415446U (en) * | 2021-11-30 | 2022-09-13 | 奥动新能源汽车科技有限公司 | Unlocking linkage device, battery pack assembly and electric vehicle |
| CN117445642B (en) * | 2023-11-08 | 2024-07-09 | 合肥恒丰汽车零部件有限公司 | Power battery package locking mechanism |
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Also Published As
| Publication number | Publication date |
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| WO2021136237A1 (en) | 2021-07-08 |
| CN113119707A (en) | 2021-07-16 |
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