CN210110867U - Protective bracket based on large cylindrical lithium ion battery pack - Google Patents
Protective bracket based on large cylindrical lithium ion battery pack Download PDFInfo
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- CN210110867U CN210110867U CN201920749024.5U CN201920749024U CN210110867U CN 210110867 U CN210110867 U CN 210110867U CN 201920749024 U CN201920749024 U CN 201920749024U CN 210110867 U CN210110867 U CN 210110867U
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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
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Abstract
The application discloses protective cradle based on big cylinder lithium ion battery group, this battery module adopt integral type protective cradle to support the battery, and the upper surface has designed busbar guiding orientation mechanism, has still designed collection pencil fixed establishment. The utility model discloses busbar, collection pencil are fixed in advance on integral type protective cradle, then insert all batteries, cover the protective cradle of opposite side again, then install the fixed end plate in both sides. The battery module has the advantages of simple structure, high strength, good stability, easy processing of raw materials, strong production capacity and high degree of automation, and effectively overcomes the defects of complex structure, low strength, poor stability, high manufacturing cost and low production efficiency of the battery module in the market.
Description
Technical Field
The utility model belongs to the technical field of lithium ion battery, especially, relate to a protective cradle based on big cylinder lithium ion battery group.
Background
With the development of the application of the lithium ion battery in the fields of electric vehicles and energy storage, people put higher demands on the voltage and the current of the lithium ion battery. At present, the series connection of lithium ion batteries meets the requirement of large voltage in application, and the parallel connection meets the requirement of large current in application. The lithium secondary battery has the advantages of high working voltage, large specific energy density, long cycle life, low self-discharge rate, no memory effect, small environmental pollution and the like, and is rapidly applied and popularized to communication equipment, mobile electronic equipment, electric tools, electric toys and aviation models. In recent years, power-type lithium secondary batteries have been increasingly widely used in large-scale energy storage facilities, electric bicycles, electric motorcycles, and even electric vehicles.
When the battery pack is formed by connecting a plurality of N single lithium ion batteries in series, the positive electrodes and the negative electrodes of any two batteries need to be connected through the conducting wires in the combination process, wiring is complex in connection, the operation is complex, and an operator can feel dazzling and cause welding errors by carelessness.
At present, the grouping protection support of the large cylindrical power lithium ion battery pack is produced in a manner that the protection support penetrates through the battery poles to directly connect the positive and negative poles of the battery with the connecting sheet, the protection support and the battery are easy to loosen and rotate, and the screw rod can loosen after too long connection time, so that the structure is unstable, and the internal resistance and the service performance requirements of the battery are influenced.
At present, a battery module is locked on a battery box body through a component of a sheet metal bending machine. Only through bolted connection between panel beating bender component and the protective cradle, the module vibration effort is whole to be used in connecting bolt, and the atress is inhomogeneous, can take place not hard up after the bolted connection time overlength, and unstable structure, the module has the risk of collapsing scattered. And the space that panel beating bender component occupy is big, reduces the specific energy density of battery module.
Disclosure of Invention
The technical problem to be solved is as follows: the utility model overcomes the shortcoming that battery module connection structure is complicated, intensity is low, poor stability, cost of manufacture is high, production efficiency is low on the market that exists among the above-mentioned prior art, discloses a protective cradle based on big post lithium ion battery group.
The technical scheme is as follows: the utility model provides a protective cradle based on big cylinder lithium ion battery group, including two integral type protective cradle A and protective cradle B between the battery utmost point post that sets up, protective cradle A and protective cradle B's reverse side all are equipped with a set of battery centre gripping pillar, and protective cradle A's front is provided with a set of square groove, and protective cradle B's front is provided with a set of circular recess, all be equipped with a set of busbar on square groove and the circular recess, protective cradle A and protective cradle B's front still is equipped with a set of triangle-shaped busbar guiding orientation mechanism and a set of busbar fixed buckle that use with busbar collocation, busbar fixed buckle is established in triangle-shaped busbar guiding orientation mechanism both sides, protective cradle A and protective cradle B's front still is equipped with gathers pencil fixed establishment, square groove is with 60 degrees evenly distributed on protective cradle A, and triangle-shaped busbar guiding orientation mechanism establishes the triangle-shaped's center of every three square groove constitution on protective cradle A The triangular busbar guiding and positioning mechanism is arranged on the two sides of the triangular busbar guiding and positioning mechanism on the protective bracket A, and the collecting wire harness fixing mechanism is arranged in the middle of the protective bracket A; the side surfaces of the protective bracket A and the protective bracket B are respectively provided with a group of guide fixing end plate positioning mechanisms and a group of embedded lock fixing end plate nuts; the side surfaces of the protective support A and the protective support B are connected through a fixed end plate, a group of long round holes are formed in the fixed end plate, and a group of positioning holes matched with the guide fixed end plate positioning mechanism and a group of protective support locking holes matched with the embedded lock fixed end plate nuts are formed in the fixed end plate.
As a preferred technical scheme of the application: the protection support A and the protection support B are square, the battery clamping support is in a triangular shape, and each surface is arc-shaped.
As a preferred technical scheme of the application: positive and negative poles are arranged in the square groove, and the groove is embedded with the square bulge on the battery end cover; the large cylindrical lithium ion battery and the large cylindrical lithium ion battery are connected in series and parallel by using a bus bar with the thickness of 0.1-3 mm.
As a preferred technical scheme of the application: the busbar fixing mechanism, the triangular busbar guiding and positioning mechanism and the three sides of the busbar are positioned, and the busbar fixing buckle adopts a volcanic-opening framework structure to buckle the busbar.
As a preferred technical scheme of the application: the side surfaces of the protective support A and the protective support B are provided with grooves, and the group of guiding fixed end plate positioning mechanisms and the group of embedded locking fixed end plate nuts are arranged in the grooves.
As a preferred technical scheme of the application: the battery module fixing end plate is inserted into grooves in the side faces of the protection support A and the protection support B through the guide mechanism, the protection support locking hole in the fixing end plate is locked with the embedded lock fixing end plate nuts in the protection support A and the protection support B through bolts, and the long round hole in the fixing end plate is fixed with the bottom of the battery box body through the long screw rod.
As a preferred technical scheme of the application: the fixed end plate is made of aluminum alloy.
Has the advantages that:
the application a protective cradle based on big post lithium ion battery group adopts above technical scheme to compare with prior art, has following technological effect:
1. the utility model adopts an integral type protective bracket to support the battery, and the reverse side of the protective bracket is provided with a battery clamping support column which plays the role of fixing the battery; a square groove is formed in the square plane of one of the protection supports, and a circular groove is formed in the square plane of the other protection support, so that the battery can be limited to rotate freely; a busbar fixing mechanism is also designed on the square plane of the protection bracket, and plays a role in fixing the busbar, and a collecting wire harness fixing mechanism is also designed, and plays a role in fixing the wire harness; a fixed end plate mechanism is designed on the side surface of the protective bracket to play a role in fixing the end plate; the slotted holes are designed on the fixed end plates and used for installing the battery modules and hoisting holes for other auxiliary transportation. The battery module has the advantages of simple structure, high strength, good stability, easy processing of raw materials, strong production capacity and high degree of automation, and effectively overcomes the defects of complex connection structure, low strength, poor stability, high manufacturing cost and low production efficiency of the battery module in the market.
2. The utility model discloses a protective cradle of integral type, the structure is very simple, and intensity is high, has convenient to use, firm in connection's advantage.
3. The utility model discloses on the whole only need with the protective cradle beat into battery utmost point post platform can, connect very simply, can keep the fixed state of battery always after connecting moreover, guarantee that circuit connection is normal stable, the connection piece can guarantee that the circuit is in low internal resistance state always with the contact close-fitting of utmost point post.
4. The utility model discloses busbar guiding orientation mechanism is triangle-shaped, with the trilateral location of busbar. The bus bar fixing buckle adopts a structure similar to a crater structure to buckle the bus bar, and the bus bar does not fall off; convenient to use is applicable to batch production.
5. The utility model discloses a water bottleneck structure is fixed the pencil on the protective cradle. Simple structure, intensity is high, has simple to operate swift, is applicable to batch production.
6. The utility model discloses battery module fixed end plate adopts aluminum alloy material, extrusion. The through long round hole is formed and fixed at the bottom of the battery box body through the long screw rod, and the battery module is fixed. Stable structure, simple to operate, be applicable to batch production.
7. The utility model inserts the positive and negative poles of a plurality of single batteries into the square groove arranged on the protection bracket, and the square groove of the protection bracket is embedded with the square bulge on the battery pole; the battery pack connected in the mode avoids the looseness and rotation of the battery, is simple in structure, is not easy to fall off and loosen in battery connection, has a fixing function, is tight in circuit connection contact, reduces the internal resistance of the battery, and is suitable for large-batch industrial production.
Drawings
Fig. 1 is a schematic structural diagram of the front side of a protective bracket a based on a large cylindrical lithium ion battery pack according to the present application;
FIG. 2 is a schematic structural diagram of the front side of a protective bracket B based on a large cylindrical lithium ion battery pack according to the present application;
FIG. 3 is a schematic structural diagram of the reverse side of a protective bracket A based on a large cylindrical lithium ion battery pack according to the present application;
FIG. 4 is a schematic structural diagram of the reverse side of a protective bracket B based on a large cylindrical lithium ion battery pack according to the present application;
fig. 5 is a schematic structural view of a bus bar fixing buckle in a protective bracket based on a large cylindrical lithium ion battery pack according to the present application;
FIG. 6 is a schematic structural diagram of a fixing end plate of a protective bracket of a large-column lithium ion battery pack according to the present application;
fig. 7 is a schematic structural diagram of a bus bar of a protection bracket B based on a large cylindrical lithium ion battery pack according to the present application after assembly.
Fig. 8 is a schematic diagram of an assembled battery of a protective bracket B based on a large cylindrical lithium ion battery pack according to the present application.
Fig. 9 is a schematic diagram of an assembled battery structure of a protective bracket based on a large cylindrical lithium ion battery pack according to the present invention.
Fig. 10 is a schematic structural diagram of an assembled fixed end plate of a protective bracket of a large-column lithium ion battery pack according to the present invention.
Description of reference numerals: 1. the device comprises protective supports A, 2, a square groove, 3, a triangular bus bar guiding and positioning mechanism, 4, a bus bar fixing buckle, 5, a collecting wire harness fixing mechanism, 6, protective supports B, 7, a circular groove, 8, a guiding and fixing end plate positioning mechanism, 9, an embedded lock fixing end plate nut, 10, a battery clamping support column, 11, a bus bar, 12, a fixing end plate, 13, a positioning hole, 14, a protective support locking hole, 15 and a long circular hole.
Detailed Description
The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention, but are not intended to limit the invention in any manner.
Example 1
As shown in fig. 1-10, a protection bracket based on a large cylindrical lithium ion battery pack comprises two integrated protection brackets a1 and B6 arranged between battery poles, a group of battery clamping pillars 10 are arranged on the reverse sides of the protection bracket a1 and the protection bracket B6, a group of square grooves 2 are arranged on the front side of the protection bracket a1, a group of circular grooves 7 are arranged on the front side of the protection bracket B6, a group of bus bars 11 are arranged on the square grooves 2 and the circular grooves 7, a group of triangular bus bar guiding and positioning mechanisms 3 and a group of bus bar fixing buckles 4 matched with the bus bars 11 are further arranged on the front sides of the protection bracket a1 and the protection bracket B6, the bus bar fixing buckles 4 are arranged on both sides of the triangular bus bar guiding and positioning mechanisms 3, collecting and fixing mechanisms 5 are further arranged on the front sides of the protection bracket a1 and the protection bracket B6, the square wire harnesses 2 are uniformly distributed on the protection bracket a1 at an angle of 60 degrees, the triangular busbar guiding and positioning mechanism 3 is arranged at the center of a triangle formed by every three square grooves 2 on the protection bracket A1, the triangular busbar guiding and positioning mechanism 3 is arranged at two sides of the triangular busbar guiding and positioning mechanism 3 on the protection bracket A1, and the collecting wire harness fixing mechanism 5 is arranged at the middle position of the protection bracket A1; the side surfaces of the protective bracket A1 and the protective bracket B6 are both provided with a group of guide fixing end plate positioning mechanisms 8 and a group of embedded lock fixing end plate nuts 9; the side of protective cradle A1 and protective cradle B6 adopts fixed end plate 12 to connect, fixed end plate 12 is inside to be equipped with a set of slotted hole 15, is equipped with a set of locating hole 13 and a set of protective cradle lock hole 14 that uses with embedded lock fixed end plate nut 9 collocation that uses of using of the fixed end plate positioning mechanism 8 collocation on the fixed end plate 12, adopts the protective cradle of integral type, and the structure is very simple, and intensity is high, has convenient to use, firm in connection's advantage. The square groove 2 is mutually matched with the convex square conductive surface structure of the battery end cover, and the effect of limiting the free rotation of the battery is achieved. As shown in the protection bracket of fig. 3, battery holding pillars 10 are uniformly arranged around the battery, and each battery holding pillar has a 3-angle shape, each surface is a circular arc shape, and plays a role in fixing the battery. A busbar fixing mechanism is further designed on the square plane of the protection bracket, the busbar fixing mechanism plays a role in fixing a busbar, and a wiring harness collecting fixing mechanism is further designed, and the wiring harness fixing mechanism plays a role in fixing a wiring harness; a fixed end plate mechanism is designed on the side surface of the protective bracket to play a role in fixing the end plate; the slotted holes are designed on the fixed end plates and used for installing the battery modules and hoisting holes for other auxiliary transportation.
Positive and negative poles are arranged in the square groove 2, and the square groove 2 is embedded with the square bulge on the battery end cover; the large cylindrical lithium ion battery and the large cylindrical lithium ion battery are connected in series and parallel by a bus bar 11 with the thickness of 0.1-3 mm.
The triangular bus bar guiding and positioning mechanism 3 is positioned on three sides of the bus bar 11, and the bus bar fixing buckle 4 adopts a volcanic-roof-shaped structure to buckle the bus bar 11, so that the bus bar is not dropped off.
Grooves are formed in the side faces of the protective support A1 and the protective support B6, and the group of guide fixing end plate positioning mechanisms 8 and the group of embedded lock fixing end plate nuts 9 are arranged in the grooves.
The battery module fixing end plate 12 is inserted into grooves in the side faces of the protection support A1 and the protection support B6 through a guide mechanism, a protection support locking hole 14 in the fixing end plate 12 is locked with an embedded lock fixing end plate nut 9 in the protection support A1 and the protection support B6 through a bolt, a long circular hole 15 in the fixing end plate 12 is fixed with the bottom of a battery box body through a long screw, and other auxiliary clamping, carrying and hoisting holes are formed.
The fixed end plate 12 is made of aluminum alloy, and the group forming method by using the large cylindrical lithium ion battery specifically comprises the following steps: the bus bars are pre-installed on the protection support, the positive and negative poles of a plurality of single batteries are inserted into the protection support with the square groove, the other protection support is covered, and then the end plates on two sides are fixed.
Example 2
As shown in fig. 1-10, a protection bracket based on a large cylindrical lithium ion battery pack comprises two integrated protection brackets a1 and B6 arranged between battery poles, a group of battery clamping pillars 10 are arranged on the reverse sides of the protection bracket a1 and the protection bracket B6, a group of square grooves 2 are arranged on the front side of the protection bracket a1, a group of circular grooves 7 are arranged on the front side of the protection bracket B6, a group of bus bars 11 are arranged on the square grooves 2 and the circular grooves 7, a group of triangular bus bar guiding and positioning mechanisms 3 and a group of bus bar fixing buckles 4 matched with the bus bars 11 are further arranged on the front sides of the protection bracket a1 and the protection bracket B6, the bus bar fixing buckles 4 are arranged on both sides of the triangular bus bar guiding and positioning mechanisms 3, collecting and fixing mechanisms 5 are further arranged on the front sides of the protection bracket a1 and the protection bracket B6, the square wire harnesses 2 are uniformly distributed on the protection bracket a1 at an angle of 60 degrees, the triangular busbar guiding and positioning mechanism 3 is arranged at the center of a triangle formed by every three square grooves 2 on the protection bracket A1, the triangular busbar guiding and positioning mechanism 3 is arranged at two sides of the triangular busbar guiding and positioning mechanism 3 on the protection bracket A1, and the collecting wire harness fixing mechanism 5 is arranged at the middle position of the protection bracket A1; the side surfaces of the protective bracket A1 and the protective bracket B6 are both provided with a group of guide fixing end plate positioning mechanisms 8 and a group of embedded lock fixing end plate nuts 9; the side of protective cradle A1 and protective cradle B6 adopts fixed end plate 12 to connect, fixed end plate 12 is inside to be equipped with a set of slotted hole 15, is equipped with a set of locating hole 13 and a set of protective cradle lock hole 14 that uses with embedded lock fixed end plate nut 9 collocation that uses of using of the fixed end plate positioning mechanism 8 collocation on the fixed end plate 12, adopts the protective cradle of integral type, and the structure is very simple, and intensity is high, has convenient to use, firm in connection's advantage. The square groove 2 is mutually matched with the convex square conductive surface structure of the battery end cover, and the effect of limiting the free rotation of the battery is achieved. As shown in fig. 3, the protective brackets a1 and B6 are square, and battery holding pillars 10 are uniformly arranged around the battery, and each battery holding pillar has a 3-angle shape, and each surface is arc-shaped, and functions to fix the battery. A busbar fixing mechanism is further designed on the square plane of the protection bracket, the busbar fixing mechanism plays a role in fixing a busbar, and a wiring harness collecting fixing mechanism is further designed, and the wiring harness fixing mechanism plays a role in fixing a wiring harness; a fixed end plate mechanism is designed on the side surface of the protective bracket to play a role in fixing the end plate; the slotted holes are designed on the fixed end plates and used for installing the battery modules and hoisting holes for other auxiliary transportation.
Positive and negative poles are arranged in the square groove 2, and the square groove 2 is embedded with the square bulge on the battery end cover; the large cylindrical lithium ion battery and the large cylindrical lithium ion battery are connected in series and parallel by a bus bar 11 with the thickness of 0.1-3 mm.
The triangular bus bar guiding and positioning mechanism 3 is positioned on three sides of the bus bar 11, and the bus bar fixing buckle 4 adopts a volcanic-roof-shaped structure to buckle the bus bar 11, so that the bus bar is not dropped off.
Grooves are formed in the side faces of the protective support A1 and the protective support B6, and the group of guide fixing end plate positioning mechanisms 8 and the group of embedded lock fixing end plate nuts 9 are arranged in the grooves.
The battery module fixing end plate 12 is inserted into grooves in the side faces of the protection support A1 and the protection support B6 through a guide mechanism, a protection support locking hole 14 in the fixing end plate 12 is locked with an embedded lock fixing end plate nut 9 in the protection support A1 and the protection support B6 through a bolt, a long circular hole 15 in the fixing end plate 12 is fixed with the bottom of a battery box body through a long screw, and other auxiliary clamping, carrying and hoisting holes are formed.
The fixed end plate 12 is made of aluminum alloy, and the group forming method by using the large cylindrical lithium ion battery specifically comprises the following steps: the bus bars are pre-installed on the protection support, the positive and negative poles of a plurality of single batteries are inserted into the protection support with the square groove, the other protection support is covered, and then the end plates on two sides are fixed.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all utilize the equivalent structure or equivalent function transformation that the specification and the attached drawings do, or directly or indirectly use in other related technical fields, all including in the same way the patent protection scope of the present invention.
Claims (7)
1. The utility model provides a protective cradle based on big post lithium ion battery group which characterized in that: the battery protection device comprises two integrated protection supports A (1) and B (6) between arranged battery poles, wherein a group of battery clamping supporting columns (10) are arranged on the reverse sides of the protection supports A (1) and B (6), a group of square grooves (2) are arranged on the front sides of the protection supports A (1), a group of circular grooves (7) are arranged on the front sides of the protection supports B (6), a group of bus bars (11) are arranged on the square grooves (2) and the circular grooves (7), a group of triangular bus bar guiding and positioning mechanisms (3) and a group of bus bar fixing buckles (4) which are matched with the bus bars (11) for use are further arranged on the front sides of the protection supports A (1) and B (6), wire harness collecting and fixing mechanisms (5) are further arranged on the front sides of the protection supports A (1) and B (6), the square grooves (2) are uniformly distributed on the protective support A (1) at an angle of 60 degrees, the triangular busbar guiding and positioning mechanisms (3) are arranged at the center of a triangle formed by every three square grooves (2) on the protective support A (1), the triangular busbar guiding and positioning mechanisms (3) are arranged at two sides of the triangular busbar guiding and positioning mechanisms (3) on the protective support A (1), and the collecting wire harness fixing mechanisms (5) are arranged at the middle position of the protective support A (1); the side surfaces of the protective support A (1) and the protective support B (6) are respectively provided with a group of guide fixing end plate positioning mechanisms (8) and a group of embedded lock fixing end plate nuts (9); the side of protective bracket A (1) and protective bracket B (6) adopts fixed end plate (12) to connect, fixed end plate (12) inside is equipped with a set of slotted hole (15), is equipped with a set of locating hole (13) and a set of protective bracket locking hole (14) of using with embedded lock fixed end plate nut (9) collocation that cooperate with fixed end plate positioning mechanism (8) of direction on fixed end plate (12).
2. The large-cylinder lithium ion battery pack-based protective bracket of claim 1, wherein: the battery clamping support is characterized in that the protective support A (1) and the protective support B (6) are square, the battery clamping support (10) is in a triangular shape, and each surface is arc-shaped.
3. The large-cylinder lithium ion battery pack-based protective bracket of claim 1, wherein: positive and negative poles are arranged in the square groove (2), and the square groove (2) is embedded with the square bulge on the battery end cover; the large cylindrical lithium ion battery and the large cylindrical lithium ion battery are connected in series and parallel by a bus bar (11) with the thickness of 0.1-3 mm.
4. The large-cylinder lithium ion battery pack-based protective bracket of claim 1, wherein: the triangular busbar guiding and positioning mechanism (3) and the busbar (11) are positioned on three sides, and the busbar fixing buckle (4) adopts a volcanic-roof framework structure to buckle the busbar (11).
5. The large-cylinder lithium ion battery pack-based protective bracket of claim 1, wherein: the side surfaces of the protective support A (1) and the protective support B (6) are provided with grooves, and a group of guiding fixed end plate positioning mechanisms (8) and a group of embedded locking fixed end plate nuts (9) are arranged in the grooves.
6. The large-cylinder lithium ion battery pack-based protective bracket according to claim 5, characterized in that: the battery module fixing end plate (12) is inserted into grooves in the side faces of the protection support A (1) and the protection support B (6) through a guide mechanism, a protection support locking hole (14) in the fixing end plate (12) is locked with an embedded lock fixing end plate nut (9) in the protection support A (1) and the protection support B (6) through a bolt, and a long circular hole (15) in the fixing end plate (12) is fixed with the bottom of a battery box body through a long screw rod.
7. The large-cylinder lithium ion battery pack-based protective bracket of claim 1, wherein: the fixed end plate (12) is made of aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920749024.5U CN210110867U (en) | 2019-05-23 | 2019-05-23 | Protective bracket based on large cylindrical lithium ion battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920749024.5U CN210110867U (en) | 2019-05-23 | 2019-05-23 | Protective bracket based on large cylindrical lithium ion battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN210110867U true CN210110867U (en) | 2020-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920749024.5U Active CN210110867U (en) | 2019-05-23 | 2019-05-23 | Protective bracket based on large cylindrical lithium ion battery pack |
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| Country | Link |
|---|---|
| CN (1) | CN210110867U (en) |
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2019
- 2019-05-23 CN CN201920749024.5U patent/CN210110867U/en active Active
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