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CN207381468U - electrode lead-out structure and energy storage device - Google Patents

electrode lead-out structure and energy storage device Download PDF

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Publication number
CN207381468U
CN207381468U CN201721506769.6U CN201721506769U CN207381468U CN 207381468 U CN207381468 U CN 207381468U CN 201721506769 U CN201721506769 U CN 201721506769U CN 207381468 U CN207381468 U CN 207381468U
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China
Prior art keywords
hole
energy storage
storage device
collection sheet
flow collection
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CN201721506769.6U
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Inventor
祝建勋
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Shandong Shengquan Amperex Technology Limited
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Jinan Shengquan Group Share Holding Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model discloses a kind of electrode lead-out structure and energy storage devices, belong to energy storage device technical field.The electrode lead-out structure includes connecting the flow collection sheet of core and the extraction lid as anode, the end set of the flow collection sheet has blind hole, the extraction lid gap inserting is in the blind hole, for gap inserting in the endoporus of outer casing end, end, the end of extraction lid of the flow collection sheet are used to once be welded to connect with the end of shell the outer rim of the flow collection sheet.The utility model not only can guarantee its reliability and stability, service life, but also can improve its production efficiency and reduce processing, testing cost.

Description

Electrode lead-out structure and energy storage device
Technical field
The utility model is related to energy storage device technical fields, and in particular to a kind of electrode lead-out structure and energy storage device.
Background technology
Battery or ultracapacitor are widely used in the fields such as industry, the energy, military affairs as energy storage device.Wherein electrode Extension primarily serves the effect of connection inner core and external equipment, as the key link of connection, using which kind of electrode Deriving structure not only has a major impact the resistance of energy storage device, also most important to the reliability and service life of monomer.
Currently used electrode lead-out structure has following two structure types, the first electrode lead-out structure such as Fig. 1 institutes Showing, extraction pole 3 and the shell of energy storage device are structure as a whole, wherein, it is adopted between the flow collection sheet 2 and extraction pole 3 that are connected with core 1 Be attached with the mode of interference fit, the outside of extraction pole 3 by flow collection sheet 2 and extraction pole 3 using ultrasonic wave/magnetic field impulse into Row circumferencial direction welds, general to be arranged using 3-6 welding point uniform, so as to extraction electrode.The connection of the electrode lead-out structure Mode is reliable, compact dimensions, but its generally can only utilize metal thermal expansion and contraction principle, need to cool down to component before assembling or Heating pretreatment, is assembled by hot charging or cold charge mode, adds assembly cost;And due to the company using interference fit Mode is connect, it is more demanding to the dimensioned precision of 3 coupling part of flow collection sheet 2 and extraction pole, add difficulty of processing;In addition, After ultrasonic wave/magnetic pulse welding, the welding slag that spot position is welded on extraction pole 3 can be uneven, influences presentation quality, to remove, Then increase by a procedure, assembly cost increases therewith;Meanwhile in ultrasonic wave/magnetic pulse welding process, since core 1 has Certain softness, can generate certain deformation after being squeezed, core 1 deform latter aspect can make its internal organizational structure generate variation after And the properties of product of energy storage device are influenced, flow collection sheet 2 on the other hand can be caused to cause welding quality bad because of no rigid support, Cause rosin joint.
Currently used second of electrode lead-out structure is as shown in Fig. 2, the shell of extraction pole 6 and energy storage device is also one Structure, wherein being first pre-positioned using transition cooperation between the flow collection sheet 5 and extraction pole 6 that are connected with core 4, afterwards to drawing The external of pole 6 carries out slot rolling to realize being fixedly connected between the two, so as to extraction electrode.The connection side of the electrode lead-out structure Formula is simple, and assembling is easily achieved.But due to the connection mode using transition cooperation, to 6 coupling part of flow collection sheet 5 and extraction pole Dimensioned precision requirement it is also higher, add difficulty of processing;In addition, the electrode lead-out structure is also needed to extraction pole 6 Outside carries out slot rolling processing, adds manufacturing procedure and difficulty of processing, and can generate pressure to core 4 during slot rolling, easily causes 4 internal organizational structure of core deforms, so as to influence the properties of product of energy storage device.
In summary, above two electrode lead-out structure not only generates the properties of product of energy storage device certain do not know Property, simultaneously because higher fit precision and excessive manufacturing procedure, also increase production difficulty and processing, testing cost, drop Low production efficiency.
Utility model content
The technical problem to be solved by the present invention is to provide one kind not only can guarantee its reliability and stability, service life, but also Its production efficiency can be improved and reduce processing, the electrode lead-out structure of testing cost and energy storage device.
In order to solve the above technical problems, the utility model offer technical solution is as follows:
A kind of electrode lead-out structure, including being used to connect the flow collection sheet of core and extraction lid as anode, the afflux The end set of piece has blind hole, and in the blind hole, the outer rim of the flow collection sheet is inserted for gap for the extraction lid gap inserting It fits in the endoporus of outer casing end, the end of the flow collection sheet, the end for drawing lid are used for and the end of the shell once company of welding It connects.
Further, the end set for drawing lid has annular notch, step surface, the afflux of the annular notch End of the piece away from core is concordant with the end of shell.
Further, the lower end of the annular notch is provided with the boss as anode.
A kind of energy storage device, including shell, core and above-mentioned electrode lead-out structure, the core and flow collection sheet are arranged at institute It states in the endoporus of outer casing end, the collector coordinates with housing slot, the end of the flow collection sheet, the end for drawing lid and institute The end for stating shell is once welded to connect.
Further, the energy storage device further includes the collector being connected with the upper end of the core, the pole as cathode Column and the connecting column being arranged between the collector and pole, be provided on the connecting column for the pole gap The first through hole of cooperation, the lower end of the collector and the connecting column are welded to connect, in institute between the connecting column and pole The upper end for stating first through hole is welded to connect.
Further, it is logical more than described first to be provided with and diameter coaxial with the first through hole for the upper end of the connecting column Second through hole of bore dia, welding connects in the pole and the groove of the second through hole formation between the connecting column and pole It connects.
Further, the corresponding position of the second through hole is provided with annular notch, institute in the outer rim of the pole State the step of annular notch and the step flush of second through hole.
Further, the poles up position is provided with diameter of the diameter less than the annular notch in the upper end of annular notch Boss.
Further, it is logical less than described first to be provided with and diameter coaxial with the first through hole for the lower end of the connecting column The third through-hole of the diameter in hole, the collector are welded to connect with connecting column at the third through-hole.
Further, handled in the outer rim of the connecting column by flange and be provided with to place the annular that insulated enclosure covers Groove.
Further, negative cover is arranged in the annular groove of the connecting column, the outer rim of the negative cover is set in institute It states in the endoporus of outer casing end, the insulated enclosure set is set between the annular groove and negative cover, the insulated enclosure Set includes felt pad and O-ring, and the upper end of the felt pad rides upon appear on the stage terrace and the negative cover of the annular groove Upper surface between, the O-ring is arranged between the leave from office terrace of annular groove and the lower face of first through hole.
The utility model has the advantages that:
Compared with prior art, the electrode lead-out structure of the utility model and energy storage device individually designed drawing as anode Go out lid, and lid gap inserting will be drawn in the blind hole of flow collection sheet, three is attached by once welding, it is reliable to realize Purpose that is fixed and obtaining preferable electric conductivity.This practical new electrode lead-out structure and energy storage device are in assembling process In without be cooled down to parts or heated up and pre-determined bit processing, save the time, improve production efficiency;Also, this The assembling of the electrode lead-out structure of utility model and welding manner make its requirement to the machining accuracy of part relatively low, are easy to real It is existing, the qualification rate of product can be largely improved, reduces production and processing cost.In addition, welding is optimal in being conductively connected Connection mode can increase the contact area between parts, reduce contact internal resistance, so as to advantageously reduce in energy storage device Resistance, high temperature or low temperature environment, substantially without influence, thereby increase the reliability and stability of electrode lead-out mode, favorably to welding effect In the service life for extending energy storage device.
Description of the drawings
Fig. 1 is the structure diagram of the first electrode lead-out structure in the prior art;
Fig. 2 is the structure diagram of second of electrode lead-out structure in the prior art;
Fig. 3 is the structure diagram of the electrode lead-out structure of the utility model;
Fig. 4 is the close-up schematic view at I in Fig. 3;
Fig. 5 is the structure diagram of the energy storage device of the utility model;
Fig. 6 be the utility model energy storage device in positive electrode deriving structure structure diagram.
Specific embodiment
In order to make the technical problems, technical solutions and advantages to be solved by the utility model clearer, below in conjunction with attached drawing And specific embodiment is described in detail.
On the one hand, the utility model provides a kind of electrode lead-out structure, as shown in Figure 3 and Figure 4, including being used to connect core 16 flow collection sheet 8 and the extraction lid 9 as anode, the end set of flow collection sheet 8 have blind hole 8-1, draw 9 gap inserting of lid blind In the 8-1 of hole, for the outer rim of flow collection sheet 8 for gap inserting in the endoporus of 7 end of shell, lid 9 is drawn in the end of flow collection sheet 8 End is used to once be welded to connect with the end of shell 7.
The individually designed extraction lid 9 as anode of electrode lead-out structure of the utility model, and 9 gap inserting of lid will be drawn In the blind hole of flow collection sheet 8, flow collection sheet 8 is also clearance fit with shell 7, by once welding to shell 7, flow collection sheet 8 and drawing The end for going out lid 9 is attached (in Fig. 3 shown in A), to realize the purpose for being reliably fixed and obtaining preferable electric conductivity.This reality With the new electrode lead-out structure of type in assembling process without be cooled down to parts or heated up and pre-determined bit handle, section The time has been saved, has improved production efficiency;Also, the assembling of the electrode lead-out structure of the utility model and welding manner make it to zero The requirement of the machining accuracy of part is relatively low, it is easy to accomplish, can largely improve the qualification rate of product, reduce production and processing into This.In addition, welding is connection mode optimal in being conductively connected, the contact area between parts can be increased, reduced in contact Resistance, so as to advantageously reduce the internal resistance of energy storage device, high temperature or low temperature environment to welding effect substantially without influence, thereby increases The reliability and stability of electrode lead-out mode is conducive to extend the service life of energy storage device.
After being once welded to connect and being ensured to weld between flow collection sheet 8, extraction 7 three of lid 9 and shell Aesthetics, the end set for drawing lid 9 have an annular notch 9-1, and the step surface of annular notch 9-1, flow collection sheet 8 are away from 16 body of core End is concordant with the end of shell 7.Flow collection sheet 8, extraction lid 9 and 7 three of shell are welded to connect at annular notch 9-1.
Further, the lower end of annular notch 9-1 is preferably provided with the boss 9-2 as anode.
Another aspect the utility model provides a kind of energy storage device, as shown in Figures 3 to 6, including shell 7,16 and of core Above-mentioned electrode lead-out structure, core 16 and flow collection sheet 8 are arranged in the endoporus of 7 end of shell, and flow collection sheet 8 is matched somebody with somebody with 7 gap of shell It closes, end, the end of extraction lid 9 and the end of shell 7 of flow collection sheet 8 are once welded to connect.
The individually designed extraction lid 9 as anode of energy storage device of the utility model, and collecting 9 gap inserting of lid is drawn In the blind hole of flow 8, flow collection sheet 8 is also clearance fit with shell 7, by once welding to shell 7, flow collection sheet 8 and drawing lid 9 End be attached (in Fig. 3 shown in A), be reliably fixed and obtain the purpose of preferable electric conductivity to realize.This is practical New energy storage device in assembling process without be cooled down to parts or heated up and pre-determined bit processing, when saving Between, improve production efficiency;Also, the assembling of the energy storage device of the utility model and welding manner make its processing essence to part The requirement of degree is relatively low, it is easy to accomplish, the qualification rate of product can be largely improved, reduces production and processing cost.In addition, welding It is connection mode optimal in being conductively connected, the contact area between parts can be increased, reduces contact internal resistance, so as to be conducive to The internal resistance of reduction energy storage device, high temperature or low temperature environment, substantially without influence, thereby increase electrode lead-out mode to welding effect Reliability and stability, be conducive to extend energy storage device service life.
Energy storage device in the utility model preferably includes ultracapacitor and battery.
As shown in figure 5, the energy storage device of the utility model further includes the negative electrode deriving structure for being arranged at 7 upper end of shell, Negative electrode deriving structure include be connected with the upper end of core 16 collector 15, as cathode pole 10 and be arranged at afflux Connecting column 11 between body 15 and pole 10,10 gap inserting of pole is in the first through hole 11-1 of connecting column 11, collector 15 It is welded to connect with the lower end of connecting column 11, is welded to connect between connecting column 11 and pole 10 in the upper end of first through hole 11-1.
Pole 10 is connected by negative electrode deriving structure by connecting column 11 with collector 15, collector 15 and connecting column 11 Lower end carries out soldering, is gap-matched between connecting column 11 and pole 10, afterwards by connecting column 11 and pole 10 the The upper end of one through hole 11-1 carries out soldering, without being cooled down to parts or being heated up and be pre-positioned in assembling process Processing, saves the time, improves production efficiency;And the requirement to the machining accuracy of part is relatively low, it is easy to accomplish, it can be compared with Big degree improves the qualification rate of product, reduces production and processing cost.
In order to increase the welding contact area between connecting column 11 and pole 10, the upper end of connecting column 11 be preferably provided with First through hole 11-1 is coaxial and diameter is more than the second through hole 11-4 of first through hole 11-1 diameters, between connecting column 11 and pole 10 It is welded to connect in the groove formed in pole 10 with the second through hole 11-4.
In addition, annular notch 10- can also be provided with the second corresponding positions of through hole 11-4 in the outer rim of pole 10 1, the step flush of the step of annular notch 10-1 and the second through hole 11-4 with further increase connecting column 11 and pole 10 it Between welding contact area.
Further, the upper end that annular notch 10-1 is located on pole 10 is preferably provided with diameter less than annular notch 10-1 Diameter boss 10-2.Boss 10-2 is for the exit as negative electrode deriving structure.
Preferably, the lower end of connecting column 11 can be provided with and diameter coaxial with first through hole 11-1 less than first through hole The third through-hole 11-3 of the diameter of 11-1, collector 15 are welded to connect with connecting column 11 at third through-hole 11-3, to realize collection Fluid 15 is fixedly connected with connecting column 11.
Further, preferably handled in the outer rim of connecting column 11 by flange and be provided with to place the ring that insulated enclosure covers Connected in star 11-2.
Preferably, negative cover 14 can be arranged in the annular groove 11-2 of connecting column 11, the outer rim of negative cover 14 is arranged In the endoporus of 7 end of shell, insulated enclosure set is set between annular groove 11-2 and negative cover 14, and insulated enclosure set includes Felt pad 12 and O-ring 13, the upper end of felt pad 12 ride upon appear on the stage terrace and the upper end of negative cover 14 of annular groove 11-2 Between face, O-ring 13 is arranged between the leave from office terrace of annular groove 11-2 and the lower face of first through hole 11-1.Negative cover 14 So that insulated enclosure set with shell 7 without being directly connected to, this structure allow insulated enclosure set as preparatory process into The outer operation of line, and without carrying out slot rolling processing to shell 7, production process and assembly process are simplified, when having saved assembling Between, improve production efficiency.The utility model is in a manner that felt pad 12 and O-ring 13 are separately handled so that felt pad 12 with electrolyte contacts, and felt pad 12 can meet insulating requirements using general material, and sealing ring 13 is general-purpose device, and Model is smaller, reduces cost.
The installation step of the energy storage device of the utility model is as follows:
Step 1:Collector 15 and flow collection sheet 8 are respectively welded on the upper/lower terminal face for being fixed on core 16, afterwards by three Person is integrally nested in the endoporus of shell 7;
Step 2:Felt pad 12 is placed in the endoporus of negative cover 14, and the upper end of felt pad 12 is made to ride upon negative cover On 14 upper surface, the two is integrally nested with getting out of a predicament or an embarrassing situation in the annular groove 11-2 in the connecting column 11 for being placed with O-ring 13 On face, the flange carried out by the upper end to connecting column 11 toward outer is handled, and the upper surface of connecting column 11 is made to form annular groove The terrace of appearing on the stage of appear on the stage terrace and the annular groove 11-2 of 11-2 are pressed on the upper end of felt pad 12, thus by negative cover 14, Felt pad 12, O-ring 13 and connecting column 11, which are attached to fix, forms cap assemblies, while O-ring 13 generates compressive deformation and realizes Sealing;
Step 3:Cap assemblies in step 2 are integrally positioned at the endoporus of shell 7, while the bottom surface of connecting column 11 compresses On the upper surface of collector 15, negative cover 14 and shell 7 are welded and fixed in the end of shell 7 afterwards, in connecting column Welding is carried out at 11 endoporus 11-1 with collector 15 to achieve a fixed connection;
Step 4:Pole 10 is nested in the first half of the endoporus 11-1 of connecting column 11, in the upper end of connecting column 11 by connecting column 11 and pole 10 be welded and fixed, thus draw energy storage device negative electrode;
Step 5:Lid 9 will be drawn to be nested in the blind hole 8-1 of flow collection sheet 8, and end, the end of flow collection sheet 8 to extraction lid 9 Portion and the end of shell 7 are once welded and fixed, and thus draw the positive electrode of energy storage device.
In conclusion during being assembled using above-mentioned assembly technology to the energy storage device of the utility model, it is not required to To be cooled down to each parts or the processing such as be heated up and be pre-positioned, saved the time, improve production efficiency;And to zero The requirement on machining accuracy of part is relatively low, realization easy to process, can largely improve the qualification rate of product, reduce production and processing into This;Meanwhile core 16 in assembling process from the extruding of external force, can be good at ensureing the constant of its internal organizational structure Shape is conducive to extend the service life of energy storage device.
The above are the preferred embodiments of the utility model, it is noted that for those skilled in the art For, on the premise of the utility model principle is not departed from, several improvements and modifications can also be made, these improvements and modifications It should be regarded as the scope of protection of the utility model.

Claims (10)

1. a kind of electrode lead-out structure, which is characterized in that including being used to connect the flow collection sheet of core and extraction lid as anode, The end set of the flow collection sheet has blind hole, and in the blind hole, the outer rim of the flow collection sheet is used for the extraction lid gap inserting In gap inserting in the endoporus of outer casing end, the end of lid is drawn for the end one with shell in the end of the flow collection sheet It is secondary to be welded to connect.
2. electrode lead-out structure according to claim 1, which is characterized in that the end set for drawing lid has annular to lack Mouthful, the end of step surface, the flow collection sheet away from core of the annular notch is concordant with the end of shell.
3. electrode lead-out structure according to claim 2, which is characterized in that the lower end of the annular notch is provided with conduct The boss of anode.
4. a kind of energy storage device, which is characterized in that drawn including any electrode in shell, core and claims 1 to 3 Structure, the core and flow collection sheet are arranged in the endoporus of the outer casing end, and the flow collection sheet coordinates with housing slot, described The end of the end of flow collection sheet, the end for drawing lid and the shell is once welded to connect.
5. energy storage device according to claim 4, which is characterized in that the energy storage device further includes upper with the core Hold the collector, the pole as cathode and the connecting column that is arranged between the collector and pole of connection, the switching It is provided on column for the first through hole with the pole clearance fit, the lower end welding of the collector and the connecting column connects It connects, is welded to connect between the connecting column and pole in the upper end of the first through hole.
6. energy storage device according to claim 5, which is characterized in that the upper end of the connecting column is provided with and described first Through hole is coaxial and diameter is more than the second through hole of the first through hole diameter, between the connecting column and pole the pole with It is welded to connect in the groove that second through hole is formed.
7. energy storage device according to claim 6, which is characterized in that in the outer rim of the pole with the second through hole phase Corresponding position is provided with annular notch, the step flush of the step and second through hole of the annular notch.
8. energy storage device according to claim 7, which is characterized in that the poles up position is set in the upper end of annular notch There is the boss that diameter is less than the diameter of the annular notch.
9. energy storage device according to claim 5, which is characterized in that the lower end of the connecting column is provided with and described first Through hole is coaxial and diameter is less than the third through-hole of the diameter of the first through hole, and the collector is with connecting column in the threeway It is welded to connect at hole.
10. energy storage device according to claim 5, which is characterized in that handled in the outer rim of the connecting column by flange It is provided with to place the annular groove that insulated enclosure covers.
CN201721506769.6U 2017-11-13 2017-11-13 electrode lead-out structure and energy storage device Active CN207381468U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721506769.6U CN207381468U (en) 2017-11-13 2017-11-13 electrode lead-out structure and energy storage device

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4044332A2 (en) 2021-01-19 2022-08-17 LG Energy Solution, Ltd. Battery with current collector, battery pack and vehicle including such battery
US20220278431A1 (en) * 2021-02-19 2022-09-01 Lg Energy Solution, Ltd. Electrode assembly, battery, and battery pack and vehicle including the same
US12132227B2 (en) 2021-01-19 2024-10-29 Lg Energy Solution, Ltd. Battery, and battery pack and vehicle comprising the same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4044332A2 (en) 2021-01-19 2022-08-17 LG Energy Solution, Ltd. Battery with current collector, battery pack and vehicle including such battery
US12132227B2 (en) 2021-01-19 2024-10-29 Lg Energy Solution, Ltd. Battery, and battery pack and vehicle comprising the same
US12136706B2 (en) 2021-01-19 2024-11-05 Lg Energy Solution, Ltd. Battery, and battery pack and vehicle including the same
US12142734B2 (en) 2021-01-19 2024-11-12 Lg Energy Solution, Ltd. Battery, and battery pack and vehicle including the same
US20220278431A1 (en) * 2021-02-19 2022-09-01 Lg Energy Solution, Ltd. Electrode assembly, battery, and battery pack and vehicle including the same
US12125985B2 (en) 2021-02-19 2024-10-22 Lg Energy Solution, Ltd. Electrode assembly, battery, and battery pack and vehicle including the same
US12125986B2 (en) 2021-02-19 2024-10-22 Lg Energy Solution, Ltd. Battery and current collector applied thereto, and battery pack and vehicle including the same
US12132175B2 (en) 2021-02-19 2024-10-29 Lg Energy Solution, Ltd. Electrode assembly, battery, and battery pack and vehicle including the same
US12136707B2 (en) 2021-02-19 2024-11-05 Lg Energy Solution, Ltd. Battery and current collector applied thereto, and battery pack and vehicle including the battery
US12199247B2 (en) 2021-02-19 2025-01-14 Lg Energy Solution, Ltd. Battery and current collector applied thereto, and battery pack and vehicle including the same

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Effective date of registration: 20180615

Address after: 250204 Shandong province Ji'nan Zhangqiu District Diao town Ji'nan Holy Spring Company South

Patentee after: Shandong Shengquan Amperex Technology Limited

Address before: 250204 Industrial Development Zone, Diao Town, Zhangqiu, Ji'nan, Shandong

Patentee before: Shengquan Group Co., Ltd., Ji'nan City

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