CN211018351U - Lithium ion battery charging system - Google Patents
Lithium ion battery charging system Download PDFInfo
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- CN211018351U CN211018351U CN201922432858.6U CN201922432858U CN211018351U CN 211018351 U CN211018351 U CN 211018351U CN 201922432858 U CN201922432858 U CN 201922432858U CN 211018351 U CN211018351 U CN 211018351U
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Abstract
The utility model discloses a lithium ion battery charging system, including the battery anchor clamps that are used for pressing from both sides dress battery, be provided with the needle bed charging device that is used for convenient charging head with the battery on the battery anchor clamps, battery anchor clamps's outside is provided with and is used for providing the electric energy and charges and conveniently detect the charge detection circuit of charge volume to the battery with needle bed charging device electric connection, the utility model discloses overall structure is simple, easy operation, low cost to strong adaptability improves application range, and overall device conveniently assembles, and area is little, and battery anchor clamps simple structure can increase the station that charges rapidly, facilitates the use, and then can increase substantially the production efficiency of enterprise, and then improves enterprise economic income.
Description
Technical Field
The utility model relates to a charging system, specific theory relates to a simple and easy system suitable for square metal casing lithium ion battery carries out charging, overall structure is simple, and the preparation is convenient zero, easy operation, and low cost can charge the lithium ion battery of multiple model, and strong adaptability's lithium ion battery charging system belongs to new forms of energy battery technical field.
Background
In recent years, with the increasing scarcity of petroleum resources, new energy industries are increasingly seen, and the new energy industries become national key research projects.
The battery carries out several times charge-discharge and carries out inside active material fully activation and capacity calibration in the indispensable needs of production in-process, and the present adopts lithium cell component to divide the capacitance cabinet to charge when charging the battery in battery production process, and it is big to change the integral structure of cabinet, and the structure is complicated to manufacturing and selling cost are high, seriously restrict the economic benefits of enterprise.
And many enterprises have limited lithium battery formation component containers due to capital problems, and the charging and discharging time of each battery is fixed, so that the whole capacity is restricted.
Therefore, in order to solve the above problems, there is a need for a system for charging a metal-casing lithium ion battery, which is simple to manufacture, easy to operate, low in cost, adaptable to various types of batteries, and strong in adaptability.
SUMMERY OF THE UTILITY MODEL
The to-be-solved main technical problem of the utility model is to provide a simple and easy system suitable for carry out charging to square metal casing lithium ion battery, overall structure is simple, and the preparation is convenient zero, easy operation, and low cost can charge the lithium ion battery of multiple model, strong adaptability's lithium ion battery charging system.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a lithium ion battery charging system, is provided with the needle bed charging device that is used for making things convenient for the head of charging to be connected with the battery including the battery anchor clamps that are used for pressing from both sides the dress battery on the battery anchor clamps, and the outside of battery anchor clamps is provided with and is used for providing the electric energy to charge and conveniently detect the charge detection circuit of charging amount with needle bed charging device electric connection.
The following is the utility model discloses to above-mentioned technical scheme's further optimization:
the needle bed charging device comprises a needle bed fixing block arranged on the battery clamp, two groups of mounting grooves are formed in the needle bed fixing block, and probe assemblies are movably arranged in the mounting grooves respectively.
Further optimization: the probe assembly comprises a probe fixing block, an overcurrent probe and a data acquisition probe are movably connected to the probe fixing block, and a flexible connecting assembly is arranged between the overcurrent probe and the data acquisition probe and between the overcurrent probe and the probe fixing block and between the data acquisition probe and the probe fixing block.
Further optimization: the flexible connecting assembly comprises springs which are respectively sleeved outside the overcurrent probe and the data acquisition probe, and two ends of each spring are respectively abutted against the lower ends of the overcurrent probe and the data acquisition probe and the probe fixing block.
Further optimization: the overcurrent probe and the data acquisition probe are provided with thread sections, two nuts are connected to the thread sections in a threaded mode, and a copper nose is clamped between the two nuts.
Further optimization: the battery clamp comprises a bottom plate, a supporting plate used for jacking the lower end of the battery is movably arranged on the bottom plate, and the supporting plate is connected with the bottom plate through a connecting assembly.
Further optimization: the charging detection circuit comprises a charging loop and a detection loop, the charging loop comprises a charger, and the positive and negative output ends of the charger are electrically connected with the copper noses on the corresponding overcurrent probes through charging wires respectively.
Further optimization: the charging line of the charging loop is provided with an emergency stop switch, a fuse and a relay in series, and the control end of the relay is electrically connected with the detection loop.
Further optimization: the detection loop comprises a BMS control unit, and the detection ends of the BMS control unit are electrically connected with the copper noses on the corresponding data acquisition probes through BMS detection lines respectively.
Further optimization: the signal output end of the BMS control unit is electrically connected with the control end of the relay, a charging cut-off voltage preset threshold value is arranged in the BMS control unit, and the relay is controlled to be disconnected when the BMS control unit monitors that the battery voltage is equal to or greater than the charging cut-off voltage preset threshold value.
The above technical scheme is adopted in the utility model, when using, according to the whole size of the battery of treating charging, the upper and lower position of adjustment backup pad and the distance position between overcurrent probe and the data acquisition probe.
The adjustment criteria were: a battery to be charged is flatly placed on a bottom plate of a battery clamp, positive and negative charging heads of the battery are respectively contacted with corresponding overcurrent probes and data acquisition probes, the battery presses the overcurrent probes and the data acquisition probes towards a probe fixing block, the spring is stressed and compressed to deform at 1/3-1/2 of the total length of the spring, the bottom of the battery is aligned with the upper part of a supporting plate, the battery is just installed in the battery clamp, and the battery is optimal at the moment and is fixed after adjustment is completed.
After the battery clamp is adjusted, a battery to be charged is installed, positive and negative charging heads of the battery are directly contacted with corresponding overcurrent probes and data acquisition probes respectively and extrude the probe compression springs, then the bottom of the battery is aligned with the upper portion of the supporting plate, fixed installation is completed, after installation is completed, the BMS control unit is opened, charging cut-off voltage is set, then a charger is started to set charging current, charging is started, the voltage of the battery can be displayed in real time through a display screen on the BMS control unit, when the voltage of the battery to be charged reaches the set charging cut-off voltage, the BMS control unit can reach an instruction, a relay in a charging loop receives a signal to cut off the charging loop, and charging is completed.
The above technical scheme is adopted in the utility model, think about ingenious, rational in infrastructure, overall structure is simple, easy operation, low cost to the position through adjustment needle bed charging device and backup pad can be applicable to and charge to the battery of multiple model, strong adaptability improves application range, and the convenient equipment of integrated device, and area is little, and battery anchor clamps simple structure can increase the station that charges rapidly, facilitates the use, and then can increase substantially enterprise production efficiency, and then improves enterprise economic profit.
The present invention will be further explained with reference to the drawings and examples.
Drawings
Fig. 1 is a schematic view of the overall structure of an embodiment of the present invention;
fig. 2 is a schematic structural view of a battery clamp according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a needle bed charging device according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a needle bed fixing block in an embodiment of the present invention;
FIG. 5 is a schematic structural view of a needle bed assembly in an embodiment of the present invention;
fig. 6 is a schematic structural view of a probe fixing block in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a probe according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a charging cabinet composed of a plurality of lithium ion battery charging systems.
In the figure: 1-a charger; 11-a charging wire; 2-a BMS control unit; 21-BMS detection lines; 3-a relay; 4-emergency stop switch; 5-a battery clamp; 51-a base plate; 52-a support plate; 53-bolt fastening holes; 54-bolt holes; 55-a baffle plate; 6-a fuse; 7-a battery; 8-needle bed fixed blocks; 81-fixed notch; 82-a probe fixing block; 83-overcurrent probe; 84-a data acquisition probe; 85-over current probe punch through; 86-data acquisition probe perforation; 87-a fixation hole; 88-a spring; 89-a nut; 9-copper nose; 10-outer frame.
Detailed Description
Example (b): as shown in fig. 1 to 7, a lithium ion battery charging system includes a battery clamp 5 for clamping a battery, a needle bed charging device for conveniently connecting with a charging head of the battery is movably disposed on the battery clamp 5, and a charging detection circuit electrically connected with the needle bed charging device and used for providing electric energy to charge the battery and conveniently detecting a charging amount is disposed outside the battery clamp 5.
The battery clamp 5 comprises a bottom plate 51, a support plate 52 used for abutting against the lower end of the battery is movably arranged on the bottom plate 51, and the support plate 52 is connected with the bottom plate 51 through a connecting assembly.
The connecting assembly comprises a plurality of groups of bolt fixing hole groups arranged on the bottom plate 51, and the plurality of groups of bolt fixing hole groups are respectively arranged along the length direction of the bottom plate 51.
Each group of bolt fixing holes is two bolt fixing holes 53, and the two bolt fixing holes 53 are respectively and symmetrically arranged on the bottom plate 51.
The support plate 52 is provided with bolt holes 54 corresponding to the bolt fixing holes 53, the bolt holes 54 are bolted with bolts, and the bolts sequentially penetrate through the bolt holes 54 and the bolt fixing holes 53 to fix the support plate 52 on the bottom plate 51.
By the design, the supporting plate 52 can be fixed on the bottom plate 51 by sequentially penetrating the bolt holes 54 and the bolt fixing holes 53 through bolts, the bolt fixing holes 53 are distributed along the length direction of the bottom plate 51, the position of the supporting plate 52 on the bottom plate 51 can be adjusted through the bolts, the fixing position of the battery can be adjusted, and the battery clamp 5 can be suitable for batteries of various types and is improved in adaptability.
The positions, close to the two sides, of the bottom plate 51 are symmetrically provided with baffle plates 55 respectively, and the two baffle plates 55 are used for limiting the positions of the batteries and facilitating the taking and placing of the batteries on the battery clamp 5.
The bottom plate 51 of the battery clamp 5 is made of stainless steel, the whole thickness is 3-5mm, and the battery clamp cannot deform or crack after long-term use.
The needle bed charging device comprises a needle bed fixing block 8 fixedly installed at the upper end of a bottom plate 51, two groups of installation grooves with rectangular empty grooves in cross section shapes are formed in the needle bed fixing block 8, and probe assemblies are movably arranged in the installation grooves respectively.
The upper end face of the needle bed fixing block 8 is provided with a fixing notch 81 communicated with the mounting groove, and the whole fixing notch 81 is a rectangular groove body.
And a bolt fastener is arranged in the fixing notch 81 and connected with the probe assembly for fixing the position of the probe assembly in the mounting groove.
Design like this, accessible bolt fastener is connected with the probe subassembly and is used for fixed probe subassembly to be located the position of mounting groove, and probe subassembly sliding connection in the mounting groove, and then accessible bolt fastener is used for adjusting the position that the probe subassembly is located the mounting groove, realizes adjusting the interval between two sets of probe subassemblies, makes this probe subassembly adapt to not unidimensional battery.
The probe assembly comprises a probe fixing block 82, an overcurrent probe 83 and a data acquisition probe 84 are movably connected to the probe fixing block 82, and a flexible connecting assembly is arranged between the overcurrent probe 83 and the data acquisition probe 84 and the probe fixing block 82.
The number of the over-current probes 83 is two, and the two over-current probes 83 are respectively symmetrically arranged on the probe fixing block 82 and close to the two sides.
The data acquisition probe 84 is one, and the data acquisition probe 84 is disposed on the probe fixing block 82 between the two overcurrent probes 83.
The probe fixing block 82 is provided with an overcurrent probe through hole 85 and a data acquisition probe through hole 86 for conveniently mounting the overcurrent probe 83 and the data acquisition probe 84.
One ends of the overcurrent probe 83 and the data collecting probe 84 are slidably connected in the overcurrent probe through hole 85 and the data collecting probe through hole 86, respectively.
The overcurrent probe penetration hole 85 has an inner diameter equal to or larger than an outer diameter of the overcurrent probe 83, and the data collection probe penetration hole 86 has an inner diameter equal to or larger than an outer diameter of the data collection probe 84.
By adopting the design, the overcurrent probe 83 and the data acquisition probe 84 can be slidably connected to the probe fixing block 82 through the overcurrent probe through hole 85 and the data acquisition probe through hole 86, and when the overcurrent probe 83 and the data acquisition probe 84 of the two sets of probe assemblies are respectively contacted with the charging head of the battery placed on the battery clamp 5 for realizing electrical connection.
The probe fixing block 82 is arranged in a mounting groove of the needle bed fixing block 8, the fixing hole 87 corresponds to the fixing notch 81 on the needle bed fixing block 8, and a bolt fastener in the fixing notch 81 is in threaded connection with the fixing hole 87 on the probe fixing block 82 and is used for fixing the probe fixing block 82 in the mounting groove.
And loosening the bolt fastener can enable the probe fixing block 82 to be located in the installation groove of the needle bed fixing block 8 to move left and right, and after the probe fixing block is moved to a proper position, the bolt fastener is screwed down, so that the position of the probe fixing block 82 located in the installation groove of the needle bed fixing block 8 can be fixed.
The flexible connecting assembly comprises a spring 88 which is respectively sleeved on the overcurrent probe 83 and the data acquisition probe 84, and two ends of the spring 88 are respectively propped against the overcurrent probe 83, the lower end of the data acquisition probe 84 and the probe fixing block 82.
Due to the design, the overcurrent probe 83 and the data acquisition probe 84 can be respectively and elastically connected with the probe fixing block 82 through the spring 88, the lower ends of the overcurrent probe 83 and the data acquisition probe 84 are kept with downward elastic force, and the connectivity between the overcurrent probe 83 and the data acquisition probe 84 and a charging head of a battery is improved.
Threaded sections are arranged at the upper ends of the overcurrent probe 83 and the data acquisition probe 84 and above the probe fixing block 82, two nuts 89 arranged at intervals are connected to the threaded sections in a threaded mode, and a copper nose 9 is clamped between the two nuts 89 and outside the overcurrent probe 83 and the data acquisition probe 84.
The place on the bottom plate 51 corresponding to the positive and negative needle bed charging device is marked with a positive sign and a negative sign clearly, wherein the positive sign represents the positive pole, and the negative sign represents the negative pole.
By the design, the positive and negative charging heads of the battery to be charged respectively correspond to plus and minus, and further correspond to the positive and negative needle bed charging devices, so that the battery is conveniently charged.
The supporting plate 52, the probe fixing block 82 and the needle bed fixing block 8 of the needle bed charging device are all made of PET materials, and the supporting plate 52, the probe fixing block 82 and the needle bed fixing block 8 which are made of the PET materials are hard in overall structure, not prone to corrosion and not prone to deformation.
The charging detection circuit comprises a charging loop and a detection loop, the charging loop comprises a charger 1, and the positive and negative output ends of the charger 1 are respectively electrically connected with the copper noses 9 on the corresponding overcurrent probes 83 through charging wires 11.
By the design, the electric energy output by the charger 1 is transmitted to the copper nose 9 through the charging wire 11 and then transmitted to the corresponding overcurrent probes 83, the charged batteries are respectively clamped on the battery clamp 5, and the positive and negative charging heads of the batteries are respectively contacted with the corresponding overcurrent probes 83, so that the batteries are charged.
A charging wire 11 of the charging circuit is provided with an emergency stop switch 4 in series, and the emergency stop switch 4 is used for mechanically cutting off the charging circuit.
When special conditions occur, the emergency stop switch 4 can be manually operated by an operator, so that the charging loop can be cut off in time.
Fuse 6 is provided with in series on charging wire 11 of charging circuit, fuse 6 is overload protection, and charging current in the charging circuit appears unusually, the electric current can produce great heat, can fuse 6 by oneself when the temperature exceedes the certain limit, plays the guard action.
The charging circuit is characterized in that a relay 3 is connected in series on a charging wire 11 of the charging circuit, the control end of the relay 3 is electrically connected with the detection circuit, and the detection circuit sends a signal to control the relay 3 to be opened or closed.
The detection loop comprises a BMS control unit 2, and the detection ends of the BMS control unit 2 are electrically connected with the copper noses 9 on the corresponding data acquisition probes 84 through BMS detection lines 21 respectively.
The BMS control unit 2 is electrically connected with a display screen, and the BMS control unit 2 is used for monitoring the voltage of the battery in real time through the BMS detection line 21 and displaying the real-time voltage through the display screen.
And the signal output end of the BMS control unit 2 is electrically connected with the control end of the relay 3 through a control line.
Be provided with the preset threshold value of cut-off voltage that charges in BMS the control unit 2, when BMS the control unit 2 monitoring battery voltage equals or is greater than the preset threshold value of cut-off voltage that charges, BMS the control unit 2 sends signal control relay 3 disconnection charging circuit, realizes cutting off charging.
The charging wire 11 and the BMS detection wire 21 are respectively installed in a wire groove for hidden wiring, so that short circuit caused by mistaken touch in the operation process of workers can be prevented to a limited extent.
The charging wire 11 and the BMS detection wire 21 are separately wired, and the maintenance can be convenient.
The charger 1, the BMS control unit 2, the relay 3, the emergency stop switch 4 and the fuse 6 are finished products in the prior art and are directly purchased from the market.
As shown in fig. 8, a plurality of the above-mentioned lithium ion battery charging systems may be sequentially arranged on the external frame 10 at intervals to form a charging cabinet, the overall structure of the external frame 10 is made of stainless steel, and the external surface thereof is uniformly coated with an insulating paint to prevent short circuit caused by carelessness when installing the battery.
When in use, whether the joints of all lines are loosened or not is checked, and if the joints are loosened, the joints are immediately screwed, so that normal use is ensured.
In use, the up-down position of the support plate 52 and the distance position between the overcurrent probe 83 and the data collecting probe 84 are adjusted according to the overall size of the battery 7 to be charged.
The adjustment criteria were: the battery 7 to be charged is flatly placed on the bottom plate 51 of the battery clamp 5, the positive and negative charging heads of the battery 7 are respectively contacted with the corresponding overcurrent probe 83 and data acquisition probe 84, the battery 7 presses the overcurrent probe 83 and the data acquisition probe 84 towards the probe fixing block 82, the spring 88 is stressed and compressed to deform at 1/3-1/2 of the total length of the spring 88, the bottom of the battery 7 is aligned with the upper part of the supporting plate 52, the battery 7 is just installed in the battery clamp 5, and the battery is optimally fixed after adjustment is completed.
After the battery clamp 5 is adjusted, the battery 7 to be charged is installed, the positive and negative charging heads of the battery 7 are directly contacted with the corresponding overcurrent probes 83 and the corresponding data acquisition probes 84 and extrude the probe compression springs 88, then the bottom of the battery 7 is aligned with the upper part of the support plate 52, fixed installation is completed, after installation is completed, the BMS control unit 2 is opened, charging cut-off voltage is set, the charger 1 is started to set charging current, charging is started, the voltage of the battery 7 can be displayed in real time through a display screen on the BMS control unit 2, when the voltage of the battery 7 to be charged reaches the set charging cut-off voltage, the BMS control unit 2 can make an instruction, a relay 3 in a charging loop receives a signal to cut off the charging loop, and charging is completed.
The above technical scheme is adopted in the utility model, think about ingenious, rational in infrastructure, the preparation is easy, easy operation, through the needle bed charging device and the backup pad that can adjust, can make its battery that is applicable to multiple model, improve application range.
In addition, the charger, the BMS control unit, the relay and the like used in the system are all the existing devices normally sold in the market, so that the whole structure is simple, the assembly and the safety are convenient, and the system is very suitable for charging and using under the condition that an enterprise needs to greatly increase production temporarily and lacks charging and discharging equipment.
For those skilled in the art, based on the teachings of the present invention, changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.
Claims (10)
1. A lithium ion battery charging system, characterized by: the battery detection device comprises a battery clamp (5) for clamping a battery, wherein a needle bed charging device which is used for being conveniently connected with a charging head of the battery is arranged on the battery clamp (5), and a charging detection circuit which is electrically connected with the needle bed charging device and is used for providing electric energy to charge the battery and conveniently detecting the charging amount is arranged outside the battery clamp (5).
2. The system of claim 1, wherein: the needle bed charging device comprises a needle bed fixing block (8) arranged on the battery clamp (5), two groups of mounting grooves are formed in the needle bed fixing block (8), and probe assemblies are movably arranged in the mounting grooves respectively.
3. The system of claim 2, wherein: the probe assembly comprises a probe fixing block (82), an overcurrent probe (83) and a data acquisition probe (84) are movably connected to the probe fixing block (82), and a flexible connecting assembly is arranged between the overcurrent probe (83), the data acquisition probe (84) and the probe fixing block (82).
4. A lithium ion battery charging system according to claim 3, wherein: the flexible connecting assembly comprises springs (88) which are respectively sleeved on the overcurrent probe (83) and the data acquisition probe (84), and two ends of each spring (88) are respectively abutted against the lower ends of the overcurrent probe (83) and the data acquisition probe (84) and the probe fixing block (82).
5. The system of claim 4, wherein: the overcurrent probe (83) and the data acquisition probe (84) are provided with a threaded section, the threaded section is in threaded connection with two nuts (89), and a copper nose (9) is clamped between the two nuts (89).
6. The system of claim 5, wherein: the battery clamp (5) comprises a bottom plate (51), a supporting plate (52) used for being connected with the lower end of the battery in a propping mode is movably arranged on the bottom plate (51), and the supporting plate (52) is connected with the bottom plate (51) through a connecting assembly.
7. The system of claim 6, wherein: the charging detection circuit comprises a charging loop and a detection loop, the charging loop comprises a charger (1), and the positive and negative output ends of the charger (1) are electrically connected with the copper noses (9) on the corresponding overcurrent probes (83) through charging wires (11).
8. The system of claim 7, wherein: charging circuit's charging wire (11) is gone up to establish ties and is provided with scram switch (4), fuse (6), relay (3), and the control end and the detection return circuit electric connection of relay (3).
9. The system of claim 8, wherein: the detection loop comprises a BMS control unit (2), and the detection ends of the BMS control unit (2) are electrically connected with the copper noses (9) on the corresponding data acquisition probes (84) through BMS detection lines (21) respectively.
10. The system of claim 9, wherein: the signal output end of the BMS control unit (2) is electrically connected with the control end of the relay (3), a charging cut-off voltage preset threshold value is arranged in the BMS control unit (2), and the relay (3) is controlled to disconnect a charging loop when the BMS control unit (2) monitors that the battery voltage is equal to or greater than the charging cut-off voltage preset threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922432858.6U CN211018351U (en) | 2019-12-30 | 2019-12-30 | Lithium ion battery charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922432858.6U CN211018351U (en) | 2019-12-30 | 2019-12-30 | Lithium ion battery charging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211018351U true CN211018351U (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922432858.6U Active CN211018351U (en) | 2019-12-30 | 2019-12-30 | Lithium ion battery charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211018351U (en) |
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2019
- 2019-12-30 CN CN201922432858.6U patent/CN211018351U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201021 Address after: 261000 No.2 workshop, No.9, hatching 1st lane, Yuqing community, Xincheng street, high tech Zone, Weifang City, Shandong Province Patentee after: Shandong Juneng lithium battery technology Co., Ltd Patentee after: Weifang Energy-accumulating Battery Co.,Ltd. Address before: 261100 intersection of Bohai Road and Xiangjiang East 2nd Street, Yangzi street, Binhai District, Weifang City, Shandong Province Patentee before: Weifang Energy-accumulating Battery Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A lithium ion battery charging system Effective date of registration: 20220323 Granted publication date: 20200714 Pledgee: Weifang Bank Co.,Ltd. Xincheng sub branch Pledgor: Weifang Energy-accumulating Battery Co.,Ltd. Registration number: Y2022980002981 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |