CN216958275U - Battery box and battery system - Google Patents
Battery box and battery system Download PDFInfo
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- CN216958275U CN216958275U CN202122578681.8U CN202122578681U CN216958275U CN 216958275 U CN216958275 U CN 216958275U CN 202122578681 U CN202122578681 U CN 202122578681U CN 216958275 U CN216958275 U CN 216958275U
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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
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Abstract
The application relates to a battery box and a battery system, which comprise a bracket, a battery module, a protection box and a controller, wherein the bracket is provided with a plurality of box bodies; the battery module comprises a first module and a second module, the first module comprises a plurality of batteries which are arranged in series, and the second module comprises a plurality of batteries which are arranged in series; the protection box is arranged between the first module and the second module in series; the controller, the protection box and the battery module form a series circuit; battery, protection box and controller set up in the box, and box quantity and battery the quantity of protection box and controller is corresponding, this application embodiment through set up a plurality of boxes on the support, with battery, protection box and controller setting in the box, the support plays the effect of fixing and protection battery, protection box and controller, prevents that battery, protection box and controller from taking place to remove or take place to strike when the car goes battery and other devices.
Description
Technical Field
The application relates to the field of battery protection control, in particular to a battery box and a battery system.
Background
Battery devices belong to important energy sources in various fields, in particular in the transport field, in the automotive field and in the rail train field, and are increasingly used. In automobiles and rail trains, the safety of battery devices directly affects the safety of the entire automobile, and therefore, a battery box is provided for placing the battery devices.
The existing battery and other devices are directly installed on the automobile, vibration can occur when the automobile or a rail train runs, the battery and other devices can move, and even the battery and other devices can collide, so that potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The application provides a battery box and battery system to solve the battery box and install on the car, the unstable technical problem of battery box when the car goes.
In order to solve the technical problem or at least partially solve the technical problem, the following technical solutions are adopted in the present application:
a battery case, comprising:
the bracket is provided with a plurality of box bodies;
the battery module comprises a first module and a second module, wherein the first module comprises a plurality of batteries which are arranged in series, and the second module comprises a plurality of batteries which are arranged in series;
the protection box is arranged between the first module and the second module in series;
the controller, the said protection box, the said battery module group make up the series circuit;
the battery, the protection box and the controller are arranged in the box body, and the number of the box body corresponds to the number of the battery, the protection box and the controller.
Further, the support is the cuboid, the support includes a plurality of panel, the panel with the leg joint forms the box, box quantity is sixteen, sixteen box is the mode setting that the array is arranged on the support, the array mode of box is four rows and four rows.
Furthermore, the number of the batteries of the first module is seven, the number of the batteries of the second module is eight, the seven batteries of the first module are respectively arranged in the boxes of the first row, the second row, the third row, the second row, the first column, the second row, the third column and the second row, the protection box and the controller are arranged in the box of the first row, the fourth row, the batteries of the second module are respectively arranged in the boxes of the third row, the third column, the third row, the fourth row, the first row, the fourth row, the second column, the fourth row, the third column and the fourth row.
Furthermore, the bottom of the support is provided with a foot rest, the foot rest is used for connecting the support to a driven carrier, and reinforcing rods are arranged at diagonal lines of rectangles on two sides of the support.
Further, still include the charging wire assembly, the assembly that charges includes first pencil and second pencil, first pencil is equipped with first end, first positive discharge end and the first negative pole end of discharging, the second pencil is equipped with the second end that charges, second positive discharge end and the second negative pole end of discharging, first charge end with the second end that charges is used for connecting the charging seat, the controller still is equipped with first positive interface, first negative pole interface, second positive interface and second negative pole interface, first positive discharge end is connected first positive interface, first negative pole discharge end is connected first negative pole interface, the second positive interface is connected to the second negative pole end of discharging make the controller switch on power.
Further, the number of the battery positive electrode ports and the number of the battery negative electrode ports are the same as the number of the batteries.
Another technical solution provided in the embodiment of the present application is a battery system of a controller.
The controller is provided with a first positive contactor, a second positive contactor and a switch, the first charging end is provided with a first charging positive electrode, the second charging end is provided with a second charging positive electrode, the first positive discharging end is provided with a first discharging positive electrode, the second positive discharging end is provided with a second discharging positive electrode, the first charging positive electrode is connected with the first discharging positive electrode and the second discharging positive electrode after being connected in series with the first positive contactor, the second charging positive electrode is connected with the first discharging positive electrode and the second discharging positive electrode after being connected in series with the second positive contactor, the first end of the switch is connected with the first charging positive electrode and the second charging positive electrode, and the other end of the switch is connected to the battery positive electrode of the second module.
Further, the controller is further provided with a first negative contactor, a second negative contactor, a main driving negative contactor and a shunt, the first charging end is further provided with a first charging negative electrode, the second charging end is further provided with a second charging negative electrode, the first negative discharging end is provided with a first discharging negative electrode, the second negative discharging end is provided with a second discharging negative electrode, the first charging negative electrode is connected with the first negative contactor, the first charging negative electrode is connected with the second negative contactor, the second charging negative electrode is connected with the second charging negative electrode, and then connected to the first main driving negative contactor, the second main driving negative contactor is connected with the first discharging negative electrode, the second discharging negative electrode is connected with the shunt, one end of the shunt is connected with the main driving negative contactor, and the other end of the shunt is connected to the battery negative electrode of the first module.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
according to the battery box and the battery system, the plurality of boxes are arranged on the support, the battery, the protection box and the controller are arranged in the boxes, the support plays a role in fixing and protecting the battery, the protection box and the controller, the battery and other devices are prevented from moving or colliding when the automobile runs, and safety accidents are prevented.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a battery box according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a protection box according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a battery according to an embodiment of the present invention.
Fig. 4 is a first schematic structural diagram of a controller according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a controller according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a high-voltage line assembly according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a charging wire assembly according to an embodiment of the present invention.
Fig. 8 is a schematic view of a connection structure of a battery box according to an embodiment of the present invention.
Fig. 9 is a circuit diagram of a battery box according to an embodiment of the present invention.
In the figure: 1-battery module, 11-first module, 12-second module, 13-battery, 131-battery positive electrode, 132-battery negative electrode; 2-protection box, 21-protection box anode, 22-protection box cathode; 3-controller, 31-controller anode, 32-controller cathode, 33-first anode interface, 34-first cathode interface, 35-second anode interface, 36-second cathode interface; 4-bracket, 41-box, 42-plate, 43-foot rest, 44-reinforcing rod; 5-a high-voltage line assembly, 51-a battery anode port, 52-a battery cathode port, 53-a protection box anode port, 54-a protection box cathode port, 55-a controller anode port and 56-a controller cathode port; 6-charging wire assembly, 61-first wire harness, 611-first charging end, 612-first positive discharging end, 613-first negative discharging end, 62-second wire harness, 621-second charging end, 622-second positive discharging end, 623-second negative discharging end; 7-battery system, 701-charging positive pole one, 702-charging positive pole two, 703-discharging positive pole one, 704-discharging positive pole two, 705-positive contactor one, 706-positive contactor two, 707-battery positive pole, 708-switch, 709-charging negative pole one, 710-charging negative pole two, 711-discharging negative pole one, 712-discharging negative pole two, 713-negative contactor one, 714-negative contactor two, 715-main driving negative contactor, 716-battery negative pole, 717-shunt; 8-charging seat.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The battery box that this application embodiment provided is used for installing on electric automobile, provides power for electric automobile.
Example one
A battery box comprises a support 4, a battery module 1, a protection box 2 and a controller 3, wherein a plurality of box bodies 41 are arranged on the support 4; the battery module 1 comprises a first module 11 and a second module 12, wherein the first module 11 comprises a plurality of batteries 13 which are arranged in series, and the second module 12 comprises a plurality of batteries 13 which are arranged in series; the protection box 2 is arranged between the first module 11 and the second module 12 in series; the controller 3, the protection box 2 and the battery module 1 form a series circuit; the battery 13, the protection box 2 and the controller 3 are arranged in the box body 41, and the number of the box body 41 corresponds to the number of the battery 13, the protection box 2 and the controller 3, in the embodiment of the application, the plurality of box bodies 41 are arranged on the support 4, the battery 13, the protection box 2 and the controller 3 are arranged in the box body 41, and the support 4 plays a role in fixing and protecting the battery 13, the protection box 2 and the controller 3, so that the battery 13 and other devices are prevented from moving or colliding when the automobile runs.
In the above technical scheme, the protection box 2 is provided with a contact system, an operating mechanism, a release, a reaction spring and an arc extinguishing system, and is used for cutting off a fault circuit when a battery is in short circuit. The protection box 2 is not a limiting structure of the present application, and it should be understood that the protection box 2 may be selected as other circuit breaking means in the art to break the fault circuit when a short circuit occurs, such as an electrical breaker and a fuse. It is understood that the structure inside the protection box 2 can be selected to be other structures capable of realizing an automatic circuit breaking, which is a conventional technical means in the field and will not be described in detail herein.
The type of the battery 13 is a lithium titanate battery, which is a preferred embodiment of the present embodiment, the charging rate of the lithium titanate battery is 2.75C, the discharging rate is 2.2C, the charging time is 20 minutes, the high-rate charging and discharging characteristic of the lithium titanate battery is more suitable for an electric vehicle for short-distance transportation, the one-way operating mileage of the electric vehicle for short-distance transportation is shorter, the electric vehicle can be parked and charged after a period of mileage is finished, and the lithium titanate battery has the characteristic of short charging time, so that the charging is convenient during parking and rest.
The support 4 is the cuboid, and the support 4 includes a plurality of panel 42, and panel 42 is connected and forms box 41 with support 4, and box 41 specifically is the recess of a cuboid, and box 41 quantity is sixteen, and sixteen boxes 41 are the mode setting of array on support 4, and the array mode of box 41 is four rows and four rows. According to the present application, the bracket 4 may be replaced with other structures to realize a structure for placing the battery 13, the protection box 2, and the controller 3.
The number of the batteries 13 of the first module 11 is seven, the number of the batteries 13 of the second module 12 is eight, the seven batteries 13 of the first module 11 are respectively arranged in the cases 41 of the first row, the second row, the third row, the first column, the second row, the third row and the fourth row, the protection box 2 and the controller 3 are arranged in the case 41 of the first row and the fourth row, and the batteries 13 of the second module 12 are respectively arranged in the cases 41 of the third row, the second row, the third row, the fourth row, the first row, the fourth row, the second row, the fourth row and the fourth row. The controller 3 is fixed on the lower surface of the box 13, the protection box 2 is fixed on the upper surface of the box 41, the specific form that the battery 13 is fixed in the box 41, the controller 3 is fixed in the box 41, and the protection box 2 is fixed in the box 41 is not shown here, but the specific form that the battery 13 is fixed in the box 41, the controller 3 is fixed in the box 41, and the protection box 2 is fixed in the box 41 is not limited in this embodiment, but those skilled in the art can know that there are many options, and the fixing function can be realized, for example, by screw fixing.
The foot rest 43 is arranged at the bottom of the support 4, the foot rest 43 is used for connecting the support 4 to a driven carrier, the driven carrier can be an automobile or a rail train, reinforcing rods 44 are arranged at the diagonal positions of the rectangles on the two sides of the support 4, and the reinforcing rods 44 play a role of reinforcing the support 4, so that the support 4 can bear the weight of the structures such as the battery 13, the protection box 2 and the controller 3.
The battery box also comprises a high-voltage wire assembly 5, the high-voltage wire assembly 5 is used for connecting the battery module 1, the protection box 2 and the controller 3, the high-voltage wire assembly 5 is provided with a battery anode port 51 and a battery cathode port 52 which are connected with the battery 13, a protection box anode port 53 and a protection box cathode port 54 which are connected with the protection box 2, a controller anode port 55 and a controller cathode port 56 which are connected with the controller 3, the battery 13 is provided with a battery anode 131 and a battery cathode 132, the protection box 2 is provided with a protection box anode 21 and a protection box cathode 22, the controller 3 is provided with a controller anode 31 and a controller cathode 32, the battery anode port 51 is connected with the battery anode 131, the battery cathode port 52 is connected with the battery cathode 132, the protection box anode port 53 is connected with the protection box anode 21, the protection box cathode port 54 is connected with the protection box cathode 22, the controller anode port 55 is connected with the controller anode 31, The controller negative electrode port 56 is connected to the controller negative electrode 32 to form the battery module 1, the protection box 2, and the controller 3 into a battery circuit.
The battery box further comprises a charging wire assembly 6, the charging wire assembly 6 is used for connecting the controller 3 with the charging seat 8, the charging assembly 6 comprises a first wire harness 61 and a second wire harness 62, the first wire harness 61 is provided with a first charging end 611, a first positive discharging end 612 and a first negative discharging end 613, the second wire harness 62 is provided with a second charging end 621, a second positive discharging end 622 and a second negative discharging end 623, the first charging end 611 and the second charging end 621 are used for connecting with the charging seat 8, the controller 3 is further provided with a first positive interface 33, a first negative interface 34, a second positive interface 35 and a second negative interface 36, the first positive electrode discharging end 622 is connected to the first positive electrode interface 35, the first negative electrode discharging end 613 is connected to the first negative electrode interface 34, the second positive electrode discharging end 622 is connected to the second positive electrode interface 35, and the second negative electrode discharging end 623 is connected to the second negative electrode interface 36, so that the controller 3 is powered on.
The number of the battery positive electrode ports 51 and the number of the battery negative electrode ports 52 are the same as the number of the batteries 13, that is, the number of the battery positive electrode ports 51 is the same as the number of the battery positive electrodes 131, the number of the battery negative electrode ports 52 is the same as the number of the battery negative electrodes 132, and the number of the battery positive electrode ports 51 and the number of the battery negative electrode ports 52 are 15, which is a preferred embodiment of the present application, so that each battery 13 is connected in series with the controller 3 through the high-voltage wire assembly 5 and then connected in series with the charging wire assembly 6.
Another technical solution provided in the embodiment of the present application is a battery system of the controller 3.
The controller 3 is provided with a first positive contactor 705 and a second positive contactor 706, the first positive contactor 705 and the second positive contactor 706 are used for cutting off the connection between the controller 3 and the charging stand 8 when the controller 3 is fully charged, the first charging end 611 is provided with a first charging anode 703, the second charging end 621 is provided with a second charging anode 702, the first anode discharging end 622 is provided with a first discharging anode 703, the second anode discharging end 622 is provided with a second discharging anode 704, the first charging anode 703 and the first positive contactor 705 are connected in series and then are connected with the first discharging anode 703 and the second discharging anode 704, the second charging anode 704 and the second positive contactor 706 are connected in series and then are connected with the first discharging anode 703 and the second discharging anode 704, the first end of the switch 708 is connected with the first charging anode 703 and the second charging anode 704, the other end is connected to the battery anode 131 of the second module 12, in particular to the battery anode 131 of the battery 13 farthest from the protection box 2 in the second module 12, the battery positive electrode 131 is a total positive terminal of the battery module 1 connected to the controller 3, the switch 708 is used for disconnecting the series circuit of the controller 3 and the battery module 1 when the controller 3 is short-circuited, and the switch 708 can be manually disconnected when the circuit is in a fault or other conditions.
The controller 3 is further provided with a negative contactor I713, a negative contactor II 714 and a main driving negative contactor 715, the negative contactor I713, the negative contactor II 714 and the main driving negative contactor 715 are used for cutting off the connection between the controller 3 and the charging seat 8 when the controller 3 is fully charged, the shunt 717 is used for detecting the current at two ends of the controller 3, the switch 708 is disconnected when the current at two ends of the controller 3 is overlarge to play a role of a cutting circuit, the first charging end 611 is further provided with a charging negative pole I701, the second charging end 621 is further provided with a charging negative pole II 710, the first negative discharging end 613 is provided with a discharging negative pole I711, the second discharging negative pole end 623 is provided with a discharging negative pole II 712, the first end of the charging negative pole I709 is connected with the negative contactor I713, the first end of the charging negative pole II 710 is connected with the negative contactor II 714, the second end of the charging negative pole I711 is connected with the second end of the charging negative pole II 710 and then connected with the first end of the main driving negative contactor 715, the second end of the main driving negative contactor 715 is connected to the first discharging negative electrode 711 and the second discharging negative electrode 712, one end of the shunt 717 is connected to the main driving negative contactor 715, and the other end is connected to the battery negative electrode 132 of the first module 11, specifically to the battery negative electrode 132 of the battery 13 farthest from the protection box 2 in the first module 11, where the battery negative electrode 132 is the overall negative end of the battery module 1 connected to the controller 3.
Example two
The controller 3 comprises a main control module and a BMS module, wherein the BMS module comprises a first positive contactor 705, a second positive contactor 706, a first negative contactor 713, a second negative contactor 714 and a main driving negative contactor 715, the BMS module is used for collecting data such as voltage, current and temperature of the battery module 1 according to the main control module and then transmitting the data to the BMS module, and the BMS module controls the disconnection and connection states of the first positive contactor 705, the second positive contactor 706, the first negative contactor 713, the second negative contactor 714 and the main driving negative contactor 715 according to the data so as to play a role in protecting a circuit.
The controller 3 further comprises a shunt 717, the BMS module further comprises a switch 708, the shunt 717 detects current at two ends of the controller 3 and transmits current data to the BMS module, the BMS module controls the open and close states of the switch 708 according to the current data, and when the current at two ends of the controller 3 is too large, the switch 708 is controlled to be opened by the BMS module, so that a protection circuit is realized.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be 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. Also, 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. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A battery box, comprising:
the bracket is provided with a plurality of box bodies;
the battery module comprises a first module and a second module, wherein the first module comprises a plurality of batteries which are arranged in series, and the second module comprises a plurality of batteries which are arranged in series;
the protection box is arranged between the first module and the second module in series;
the controller, the protection box and the battery module form a series circuit;
the battery, the protection box and the controller are arranged in the box body, and the number of the box body corresponds to the number of the battery, the protection box and the controller.
2. The battery box according to claim 1, wherein the support is rectangular, the support comprises a plurality of plates, the plates are connected with the support and form the boxes, the number of the boxes is sixteen, the sixteen boxes are arranged on the support in an array manner, and the array manner of the boxes is four columns and four rows.
3. A battery box according to claim 1, wherein the number of the batteries of the first module is seven, the number of the batteries of the second module is eight, the seven batteries of the first module are respectively arranged in the boxes of the first row and the second row, the first row and the second row and the third row, the second row and the third row and the second row and the fourth row, the protection box and the controller are arranged in the box of the first row and the fourth row, and the batteries of the second module are respectively arranged in the boxes of the third row and the first row and the third row and the fourth row and the first row and the fourth row and the second row and the third row and the fourth row.
4. The battery box according to claim 1, wherein the bottom of the support is provided with a foot stand for connecting the support to a driven carrier, and reinforcing rods are arranged on the two sides of the support at the diagonal of the rectangle.
5. The battery box of claim 1, further comprising a high voltage cable assembly, wherein the high voltage cable assembly comprises a positive battery port and a negative battery port for connecting a battery, a positive protection box port and a negative protection box port for connecting a protection box, a positive controller port and a negative controller port for connecting a controller, the battery comprises a positive battery and a negative battery, the protection box comprises a positive protection box and a negative protection box, the controller comprises a positive controller and a negative controller, the positive battery port is connected with the positive battery, the negative battery port is connected with the negative battery, the positive protection box port is connected with the positive protection box, the negative protection box port is connected with the negative protection box, the positive controller port is connected with the positive controller, the negative controller port is connected with the negative controller port, the positive controller port is connected with the negative controller port, and the negative controller port connects the negative controller port with the positive controller port and the negative controller port connects the positive protection box, the negative controller port, the positive controller port, the negative controller port, the positive controller port, the negative controller, the positive controller port, the positive controller, the negative terminal, the positive controller port, the positive controller, the negative terminal, the positive terminal, the negative terminal, the positive terminal, the negative terminal, the positive terminal, the negative terminal, the positive terminal, the negative terminal, the battery module, the negative terminal, the battery module, the negative terminal, the battery module, the battery, The protection box and the controller form a battery circuit.
6. The battery box of claim 1, further comprising a charging cord assembly, the charging wire assembly comprises a first wire harness and a second wire harness, the first wire harness is provided with a first charging end, a first positive electrode discharging end and a first negative electrode discharging end, the second wire harness is provided with a second charging end, a second anode discharging end and a second cathode discharging end, the first charging end and the second charging end are used for being connected with a charging seat, the controller is also provided with a first positive electrode interface, a first negative electrode interface, a second positive electrode interface and a second negative electrode interface, the first positive electrode discharging end is connected with the first positive electrode interface, the first negative electrode discharging end is connected with the first negative electrode interface, the second positive electrode discharging end is connected with the second positive electrode interface, and the second negative electrode discharging end is connected with the second negative electrode interface, so that the controller is powered on.
7. A battery box according to claim 5, characterized in that the number of the battery positive electrode ports and the number of the battery negative electrode ports are the same as the number of the batteries.
8. A battery system comprising a battery box according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122578681.8U CN216958275U (en) | 2021-10-25 | 2021-10-25 | Battery box and battery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122578681.8U CN216958275U (en) | 2021-10-25 | 2021-10-25 | Battery box and battery system |
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| Publication Number | Publication Date |
|---|---|
| CN216958275U true CN216958275U (en) | 2022-07-12 |
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| CN202122578681.8U Active CN216958275U (en) | 2021-10-25 | 2021-10-25 | Battery box and battery system |
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| CN (1) | CN216958275U (en) |
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2021
- 2021-10-25 CN CN202122578681.8U patent/CN216958275U/en active Active
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