CN210270109U - Battery pack insulation detection circuit - Google Patents
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- CN210270109U CN210270109U CN201920376671.6U CN201920376671U CN210270109U CN 210270109 U CN210270109 U CN 210270109U CN 201920376671 U CN201920376671 U CN 201920376671U CN 210270109 U CN210270109 U CN 210270109U
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- 238000001514 detection method Methods 0.000 title claims abstract description 21
- 239000004576 sand Substances 0.000 claims abstract description 22
- 238000009421 internal insulation Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000032683 aging Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 230000005669 field effect Effects 0.000 description 1
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Abstract
The application discloses battery package insulation detection circuitry, this circuit includes: the adjustable resistance module is connected between the negative electrode of the battery pack and the electric chassis; the control unit is used for acquiring voltage values of the adjustable resistance module under two different resistance values, and listing the current resistance value of the adjustable resistance module, the voltage value of the adjustable resistance module under the current resistance value and the relative electric chassis of the insulation weak point of the battery pack before and after the resistance value of the adjustable resistance module is changed according to the kirchhoff voltage lawResistance value R ofsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a According to the voltage of each string of batteries in the battery pack and UsTo locate the weak point of insulation of the battery pack. The application realizes the accurate positioning of the internal insulation weak point of the battery pack and the acquisition of the resistance value of the insulation weak point relative to the electric chassis.
Description
Technical Field
The utility model relates to a power electronic technology field, more specifically say, relate to an insulating detection circuitry of battery package.
Background
The battery pack is formed by assembling and packaging a plurality of batteries and is used for providing higher voltage and capacity, for example, the battery pack of an electric automobile provides hundreds of volts and dozens of ampere hours by connecting the plurality of batteries in series and in parallel.
As can be seen from the battery pack insulation resistance model of an electric vehicle shown in fig. 1, insulation resistance exists between each series connection point between batteries and an electric chassis (reference ground), resistance values of all insulation resistances are close to infinity under ideal conditions, and insulation aging or mechanical damage may cause a great decrease in resistance values of individual insulation resistances (the series connection point with too small resistance value of the insulation resistance is an insulation weak point), thereby threatening safety of people and vehicles. Therefore, the insulation condition of the battery pack needs to be monitored on line, the insulation weak point in the battery pack is accurately positioned, and a foundation is laid for follow-up work of maintenance personnel.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an insulating detection circuitry of battery package to the inside insulating weak point of accurate positioning battery package learns the resistance on the relative electric chassis of insulating weak point.
A battery pack insulation detection circuit comprising:
the adjustable resistance module is connected between the negative electrode of the battery pack and the electric chassis;
a control unit for obtaining the voltage values of the adjustable resistance module under two different resistance values and then determining the voltage value according to kirchhoff voltageThe current resistance value of the adjustable resistance module, the voltage value of the adjustable resistance module under the current resistance value, and the resistance value R of the battery pack insulation weak point relative to the electric chassis (reference ground) before and after the resistance value of the adjustable resistance module is changed are listedsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a Then according to the voltage of each string of batteries in the battery pack and the UsTo locate the weak point of insulation of the battery pack.
A battery pack insulation detection circuit comprising:
the adjustable resistance module is connected between the positive electrode of the battery pack and the electric chassis;
the control unit is used for acquiring voltage values of the adjustable resistance module under two different resistance values, and listing the current resistance value of the adjustable resistance module, the voltage value of the adjustable resistance module under the current resistance value and the resistance value R of the battery pack insulation weak point relative to the electric chassis before and after the resistance value of the adjustable resistance module is changed according to the kirchhoff voltage lawsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a Then according to the voltage of each string of batteries in the battery pack and the UsTo locate the weak point of insulation of the battery pack.
Optionally, the adjustable resistance module includes a first measuring resistor, a second measuring resistor, and a first switch, where the second measuring resistor is connected in series with the first switch and then connected in parallel with the first measuring resistor.
Optionally, the adjustable resistance module includes a third measuring resistor, a fourth measuring resistor, and a second switch, where the fourth measuring resistor is connected in parallel with the second switch and then connected in series with the third measuring resistor.
Optionally, the control unit is configured to control the adjustable resistance module to adjust the resistance value of the adjustable resistance module by sending a control instruction to the adjustable resistance module.
OptionallyThe control unit is also used for judging to obtain RsAnd when the temperature is lower than the preset value, sending an alarm signal.
According to the above technical scheme, the utility model discloses insert adjustable resistance module between arbitrary utmost point (negative pole or positive pole) of battery package and electric chassis, change return circuit current through the resistance that changes this adjustable resistance module, measure the voltage value around this adjustable resistance module resistance changes, again based on kirchhoff's voltage law row binary primary equation group to solve the resistance R who obtains the relative electric chassis of the insulating weak point of battery packagesAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsFinally, according to the voltage of each string of batteries in the battery pack and the UsCome the position of confirming the insulating weak point of battery package, like this the utility model discloses just realize accurate positioning insulating weak point and know the resistance on the relative electric chassis of insulating weak point.
Drawings
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, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating distribution of insulation resistance in a battery pack according to the prior art;
fig. 2 is a schematic diagram of a structure of a battery pack insulation detection circuit disclosed in an embodiment of the present invention;
FIG. 3 is a schematic diagram of a tunable resistance module used in FIG. 2;
FIG. 4 is a schematic diagram of another adjustable resistance module applied to FIG. 2;
fig. 5 is a schematic diagram of a structure of another battery pack insulation detection circuit disclosed in the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 2, the embodiment of the utility model discloses battery package insulation detection circuitry, include:
an adjustable resistance module 100 connected between the negative pole of the battery pack and the electrical chassis (referenced to ground);
and a control unit (not shown in the figure);
the control unit is used for acquiring voltage values of the adjustable resistance module 100 under two different resistance values, and listing the current resistance value of the adjustable resistance module 100, the voltage value of the adjustable resistance module 100 under the current resistance value, and the resistance value R of the battery pack insulation weak point relative to the electric chassis before and after the resistance value of the adjustable resistance module 100 is changed according to kirchhoff's voltage lawsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a Then according to the voltage of each string of batteries in the battery pack and the UsTo locate the weak point of insulation of the battery pack.
The operation of the embodiment shown in fig. 2 will be described in detail with reference to fig. 1 and 2.
As shown in fig. 1, the battery pack is formed by assembling and packaging a plurality of batteries, an insulation resistor exists between each series connection contact between the batteries and the electric chassis, and ideally, the resistance values of all the insulation resistors are close to infinity; for convenience of description, in FIG. 1, n (n.gtoreq.2) strings of cells connected in series are defined as a cell E in turn1～EnEach battery string can be a single battery or a parallel combination of a plurality of single batteries, and a battery Ei(i-1, 2, …, n-1) positive electrode connected to battery Ei+1Negative electrode of, battery EiThe insulation resistance of the negative electrode relative to the electric chassis is RiBatteriesEnThe insulation resistance of the negative electrode relative to the electric chassis is RnCell EnThe insulation resistance of the anode relative to the electric chassis is Ri+1. R may be caused by insulation aging or mechanical damage1To Rn+1The resistance of any one of the insulation resistors is greatly reduced, assuming that R iss(s is more than or equal to 1 and less than or equal to n +1) is the resistance of the insulation weak point, then RsA large leakage current flows.
While the embodiment shown in fig. 2 is on the negative electrode (i.e., E) of the battery pack1Negative pole) and the electric chassis, changing the current flowing on the adjustable resistance module 100 by changing the resistance value of the adjustable resistance module 100, and measuring the voltage of the adjustable resistance module 100 before and after the resistance value is changed;
assuming that the initial resistance value of the adjustable resistor module 100 is the first resistance value a, and a is a known value, the voltage value U corresponding to the adjustable resistor module 100 under the first resistance value a is obtained through measurementmThen, according to kirchhoff's voltage law, we can obtain:
next, the resistance value of the adjustable resistor module 100 is adjusted to a second resistance value b, b is a known value, and a voltage value U 'corresponding to the adjustable resistor module 100 under the second resistance value b is obtained through measurement'mThen, according to kirchhoff's voltage law, we can obtain:
the two formulas are combined to obtain:
according to the voltage of each string of batteries in the battery pack and UsCan determine RsE.g. Us＝E1+E2Then R issIs R3That is to say thatBattery E2And a battery E3The series connection point between the two points is the insulation weak point. Thus, the point of weakness of the insulation can be accurately located and the resistance of the point of weakness of the insulation with respect to the electrical chassis can be known.
Optionally, the adjustable resistance module 100 comprises a first measuring resistor RmAnd a second measurement resistance R'mAnd a first switch K1, wherein a second measured resistance R'mIs connected in series with a first switch K1 and then is connected with a first measuring resistor RmIn parallel as shown in fig. 3. Rm、R'mThe resistance values of the adjustable resistance module 100 can be changed by controlling the on-off of the K1.
Alternatively, the adjustable resistance module 100 comprises a third measuring resistance RkFourth measurement resistance R'kAnd a second switch K2, wherein a fourth measured resistance R'kIs connected with a third measuring resistor R after being connected with a second switch K2 in parallelkIn series as shown in fig. 4. Rk、R'kThe resistance values of the adjustable resistance module 100 can be changed by controlling the on-off of the K2.
Of course, the adjustable resistance module 100 may also adopt other types of circuit topologies, and is not limited to fig. 3 and 4.
As can be seen from the above description, in the embodiment shown in fig. 2, the adjustable resistor module 100 is connected between the negative electrode of the battery pack and the electrical chassis, the loop current is changed by changing the resistance of the adjustable resistor module 100, the voltage value before and after the resistance of the adjustable resistor module 100 is changed is measured, and then the resistance R of the insulation weak point of the battery pack relative to the electrical chassis is obtained by solving based on the kirchhoff voltage law series primary binary equation setsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsFinally, according to the voltage of each string of batteries in the battery pack and the UsThe location of the insulation weak point of the battery pack is determined, so that accurate location of the insulation weak point and knowledge of the resistance value of the insulation weak point relative to the electrical chassis are achieved.
Referring to fig. 5, the embodiment of the utility model discloses still another battery package insulation detection circuit, include:
an adjustable resistance module 200 connected between the positive pole of the battery pack and the electrical chassis (referenced to ground);
and a control unit (not shown in the figure);
the control unit is used for acquiring voltage values of the adjustable resistance module 200 under two different resistance values, and listing the current resistance value of the adjustable resistance module 200, the voltage value of the adjustable resistance module 200 under the current resistance value and the resistance value R of the battery pack insulation weak point relative to the electric chassis before and after the resistance value of the adjustable resistance module 200 is changed according to the kirchhoff voltage lawsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a According to the voltage of each string of batteries in the battery pack and UsTo locate the weak point of insulation of the battery pack.
The operation of the embodiment shown in fig. 5 will be described in detail with reference to fig. 1 and 5.
As shown in fig. 1, the battery pack is formed by assembling and packaging a plurality of batteries, and the batteries may be single batteries, or may be a series, parallel or series-parallel combination of a plurality of single batteries; an insulation resistor exists between each series connection contact between the batteries and the electric chassis, and the resistance values of all the insulation resistors are close to infinity under an ideal condition; for convenience of description, in FIG. 1, n (n.gtoreq.2) strings of cells connected in series are defined as a cell E in turn1～EnEach battery string can be a single battery or a parallel combination of a plurality of single batteries, and a battery Ei(i-1, 2, …, n-1) positive electrode connected to battery Ei+1Negative electrode of, battery EiThe insulation resistance of the negative electrode relative to the electric chassis is RiCell EnThe insulation resistance of the negative electrode relative to the electric chassis is RnCell EnThe insulation resistance of the anode relative to the electric chassis is Ri+1. R may be caused by insulation aging or mechanical damage1To Rn+1The resistance of any one of the insulation resistors is greatly reduced, assuming that R iss(s is more than or equal to 1 and less than or equal to n +1) is the resistance of the insulation weak point, then RsA large leakage current flows.
While figure shows5 in the positive electrode of the battery pack (i.e., E)nPositive pole) and the electric chassis, changing the current flowing on the adjustable resistance module 200 by changing the resistance value of the adjustable resistance module 200, and measuring the voltage of the adjustable resistance module 200 before and after the resistance value is changed;
assuming that the initial resistance value of the adjustable resistor module 200 is the first resistance value a, and a is a known value, the voltage value corresponding to the adjustable resistor module 200 under the first resistance value a is obtained as U through measurementoTotal voltage of the battery pack is UrThen, according to kirchhoff's voltage law, we can obtain:
next, the resistance value of the adjustable resistor module 200 is adjusted to a second resistance value b, b is a known value, and the voltage value corresponding to the adjustable resistor module 200 under the second resistance value b is obtained as U 'through measurement'oThen, according to kirchhoff's voltage law, we can obtain:
the two formulas are combined to obtain:
according to the voltage of each string of batteries in the battery pack and UsCan determine RsE.g. Us＝E1+E2Then R issIs R3That is to say battery E2And a battery E3The series connection point between the two points is the insulation weak point. Thus, the point of weakness of the insulation can be accurately located and the resistance of the point of weakness of the insulation with respect to the electrical chassis can be known.
As can be seen from the above description, the adjustable resistor module 200 is connected between the positive electrode of the battery pack and the electrical chassis in the embodiment shown in fig. 5, and the loop current is changed by changing the resistance of the adjustable resistor module 200, and then the loop current is measuredThe voltage values before and after the resistance value of the adjustable resistance module 200 is changed are solved based on a kirchhoff voltage law series binary linear equation set, so that the resistance value R of the insulation weak point of the battery pack relative to the electric chassis is obtainedsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsFinally, according to the voltage of each string of batteries in the battery pack and the UsThe location of the insulation weak point of the battery pack is determined, so that accurate location of the insulation weak point and knowledge of the resistance value of the insulation weak point relative to the electrical chassis are achieved.
The adjustable resistance module 200 in the embodiment shown in fig. 5 may have the same circuit topology as the adjustable resistance module 100.
Optionally, in any of the embodiments disclosed above, the control unit sends a control instruction to a switch in the adjustable resistance module to control the adjustable resistance module to adjust its own resistance value. In this case, the switch in the adjustable resistor module may be, for example, a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), an IGBT (Insulated Gate Bipolar Transistor), a triode, or the like, but is not limited thereto. The control unit periodically detects the insulation condition of the battery pack and can find whether the insulation of the battery pack is weak or not at the first time.
Optionally, in any embodiment disclosed above, the control unit is further configured to determine that R is obtained in the determinationsAnd when the temperature is lower than the preset value, sending an alarm signal to inform maintenance personnel of maintenance in the first time. The preset value is determined according to actual requirements.
To sum up, the utility model discloses insert the adjustable resistance module between arbitrary utmost point (negative pole or positive pole) of battery package and electric chassis, change return circuit current through the resistance that changes this adjustable resistance module, measure the voltage value around this adjustable resistance module resistance changes, be based on kirchhoff's voltage law row binary primary equation group again to solve and obtain the resistance R on the relative electric chassis of the insulating weak point of battery packagesAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsFinally according to the voltage of each string of batteries in the battery pack andUsthe location of the insulation weak point of the battery pack is determined, so that accurate location of the insulation weak point and knowledge of the resistance value of the insulation weak point relative to the electrical chassis are achieved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
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, the use of the verb "comprise a" to define an element does not exclude the presence of another, identical element in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use 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 embodiments of the invention. Thus, the present embodiments are not intended to be limited to the embodiments shown herein but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A battery pack insulation detection circuit, comprising:
the adjustable resistance module is connected between the negative electrode of the battery pack and the electric chassis;
a control unit for controlling the operation of the display unit,the device is used for obtaining voltage values of the adjustable resistance module under two different resistance values, and listing the current resistance value of the adjustable resistance module, the voltage value of the adjustable resistance module under the current resistance value and the resistance value R of the battery pack insulation weak point relative to the electric chassis before and after the resistance value of the adjustable resistance module is changed according to kirchhoff's voltage lawsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a According to the voltage of each string of batteries in the battery pack and UsTo locate the weak point of insulation of the battery pack.
2. The battery pack insulation detection circuit of claim 1, wherein the adjustable resistance module comprises a first measuring resistor, a second measuring resistor, and a first switch, wherein the second measuring resistor is connected in series with the first switch and then connected in parallel with the first measuring resistor.
3. The battery pack insulation detection circuit of claim 1, wherein the adjustable resistance module comprises a third measuring resistor, a fourth measuring resistor, and a second switch, wherein the fourth measuring resistor is connected in parallel with the second switch and then connected in series with the third measuring resistor.
4. The battery pack insulation detection circuit according to claim 1, wherein the control unit is configured to control the adjustable resistance module to adjust its resistance value by sending a control command to the adjustable resistance module.
5. The battery pack insulation detection circuit of claim 1, wherein the control unit is further configured to determine that R is obtainedsAnd when the temperature is lower than the preset value, sending an alarm signal.
6. A battery pack insulation detection circuit, comprising:
the adjustable resistance module is connected between the positive electrode of the battery pack and the electric chassis;
the control unit is used for acquiring voltage values of the adjustable resistance module under two different resistance values, and listing the current resistance value of the adjustable resistance module, the voltage value of the adjustable resistance module under the current resistance value and the resistance value R of the battery pack insulation weak point relative to the electric chassis before and after the resistance value of the adjustable resistance module is changed according to the kirchhoff voltage lawsAnd the voltage value U of the insulation weak point of the battery pack relative to the negative electrode of the battery packsThe corresponding relation equation between the two elements forms a linear equation system of two elements, and R is obtained by solvingsAnd Us(ii) a According to the voltage of each string of batteries in the battery pack and UsTo locate the weak point of insulation of the battery pack.
7. The battery pack insulation detection circuit of claim 6, wherein the adjustable resistance module comprises a first measuring resistor, a second measuring resistor, and a first switch, wherein the second measuring resistor is connected in series with the first switch and then connected in parallel with the first measuring resistor.
8. The battery pack insulation detection circuit of claim 6, wherein the adjustable resistance module comprises a third measuring resistor, a fourth measuring resistor and a second switch, wherein the fourth measuring resistor is connected in parallel with the second switch and then connected in series with the third measuring resistor.
9. The battery pack insulation detection circuit according to claim 6, wherein the control unit is configured to control the adjustable resistance module to adjust its resistance value by sending a control command to the adjustable resistance module.
10. The battery pack insulation detection circuit of claim 6, wherein the control unit is further configured to determine that R is obtainedsAnd when the temperature is lower than the preset value, sending an alarm signal.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920376671.6U CN210270109U (en) | 2019-03-22 | 2019-03-22 | Battery pack insulation detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920376671.6U CN210270109U (en) | 2019-03-22 | 2019-03-22 | Battery pack insulation detection circuit |
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| CN210270109U true CN210270109U (en) | 2020-04-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752665A (en) * | 2019-03-22 | 2019-05-14 | 上海度普新能源科技有限公司 | A kind of battery pack insulation detecting circuit and detection method |
| CN117434408A (en) * | 2023-12-15 | 2024-01-23 | 珠海科创储能科技有限公司 | Battery insulation detection circuit, method and device, storage medium and electronic equipment |
-
2019
- 2019-03-22 CN CN201920376671.6U patent/CN210270109U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752665A (en) * | 2019-03-22 | 2019-05-14 | 上海度普新能源科技有限公司 | A kind of battery pack insulation detecting circuit and detection method |
| CN117434408A (en) * | 2023-12-15 | 2024-01-23 | 珠海科创储能科技有限公司 | Battery insulation detection circuit, method and device, storage medium and electronic equipment |
| CN117434408B (en) * | 2023-12-15 | 2024-03-29 | 珠海科创储能科技有限公司 | Battery insulation detection circuit, method and device, storage medium and electronic equipment |
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Address after: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee after: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee after: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. Address before: 201804 room 108, floor 1, building 1, No. 6988, Jiasong North Road, Anting Town, Jiading District, Shanghai J67 Patentee before: SHANGHAI DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. Patentee before: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. |
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Denomination of utility model: A battery pack insulation detection circuit Effective date of registration: 20220114 Granted publication date: 20200407 Pledgee: Industrial and Commercial Bank of China Limited Suzhou Wuzhong sub branch Pledgor: DuPu (Suzhou) New Energy Technology Co.,Ltd. Registration number: Y2022320010022 |
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Date of cancellation: 20230202 Granted publication date: 20200407 Pledgee: Industrial and Commercial Bank of China Limited Suzhou Wuzhong sub branch Pledgor: DuPu (Suzhou) New Energy Technology Co.,Ltd. Registration number: Y2022320010022 |
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Effective date of registration: 20231024 Address after: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee after: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee after: Volkswagen Automotive Co.,Ltd. Address before: Room 1001, 10 / F, office building, Shihu Jinling Plaza, 88 Nanxijiang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province, 215128 Patentee before: DuPu (Suzhou) New Energy Technology Co.,Ltd. Patentee before: JIANGSU DUPU NEW ENERGY TECHNOLOGY Co.,Ltd. |