CN213660575U - Battery module and vehicle with same - Google Patents
Battery module and vehicle with same Download PDFInfo
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- CN213660575U CN213660575U CN202022149078.3U CN202022149078U CN213660575U CN 213660575 U CN213660575 U CN 213660575U CN 202022149078 U CN202022149078 U CN 202022149078U CN 213660575 U CN213660575 U CN 213660575U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model is suitable for a power battery and vehicle technical field disclose a battery module and have vehicle of this battery module. The battery module comprises a battery cell array, side plates and end plates, wherein the side plates are arranged on two sides of the battery cell array in a first direction, the end plates are arranged on two sides of the battery cell array in a second direction, the battery module also comprises a connecting piece and a locking piece, the connecting piece is provided with a first welding wall and a second welding wall which are perpendicular to each other, the first welding wall and the second welding wall are respectively positioned on the outer side surfaces of the end plates in the first direction and the second direction, and the side plates are attached and welded with the first welding wall or/and the second welding wall; the end plate is provided with and is used for supplying locking piece male locking hole, and the connecting piece is equipped with upset portion, the retaining member passes upset portion inserts locking downthehole, with will the connecting piece with the end plate is fixed. The vehicle is provided with the battery module. The utility model provides a battery module and have vehicle of this battery module, end plate and curb plate can reliably be connected, and low in production cost.
Description
Technical Field
The utility model belongs to the technical field of power battery and vehicle, especially, relate to a battery module and have vehicle of this battery module.
Background
The battery module used as the power battery is generally provided with a peripheral frame, and an end plate and a side plate play a role in restraining and fixing each battery unit, and the connection mode of the end plate and the side plate is related to the structural reliability of the battery module. At present, the connection mode of the end plate and the side plate of the battery module mainly comprises welding, screw connection or rivet connection. The choice of the connection mode is often determined by the materials of the end plates and the side plates. When the end plates and the side plates are made of the same material, if the end plates and the side plates are made of aluminum or steel, the end plates and the side plates can be welded or bolts/rivets can be adopted. When the end plate and the side plate are made of different materials, such as an aluminum end plate and a steel side plate, the two materials cannot be welded due to large melting point difference (the melting point of aluminum is 660 ℃, and the melting point of steel is about 1500 ℃), and generally, the two materials can only be fixed through screw/rivet connection, and the connection reliability is poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of above-mentioned technical problem at least, provide a battery module and have vehicle of this battery module, its end plate and curb plate can reliably be connected, and low in production cost.
The technical scheme of the utility model is that: a battery module comprises a battery cell array, side plates and end plates, wherein the side plates are arranged on two sides of the battery cell array in a first direction, the end plates are arranged on two sides of the battery cell array in a second direction, the first direction is perpendicular to the second direction, the battery module further comprises a connecting piece and a locking piece, the connecting piece is provided with a first welding wall and a second welding wall which are perpendicular to each other, the first welding wall is located on the outer side surface of the end plate in the first direction, the second welding wall is located on the outer side surface of the end plate in the second direction, and the side plates are in adhesion welding with the first welding wall or/and the second welding wall; the end plate is provided with and is used for supplying locking piece male locking hole, the connecting piece is equipped with and is located the upset portion of locking hole top, the retaining member passes upset portion inserts in the locking is downthehole, with incite somebody to action the connecting piece with the end plate is fixed.
Optionally, the first welding wall is welded to one side of the side plate facing the cell array; and/or the side plate is provided with a bent edge attached to the outer side of the second welding wall, and the bent edge is welded to the second welding wall.
Optionally, the end plate is provided with an embedded groove along the height direction, the connecting piece is provided with an embedded portion, and the embedded portion is inserted in the embedded groove.
Optionally, every the end plate is provided with two the embedded groove, two the embedded groove is close to respectively the end plate is along the both ends of first direction, the embedded groove is followed the direction of height of end plate link up to the lower terminal surface from the up end, the medial surface of end plate towards in the electricity core array, the embedded groove still with the lateral surface of end plate communicates with each other.
Optionally, every the end plate is provided with two locking hole, two locking hole is followed first direction respectively and is close to in the both ends of end plate, locking hole certainly the up end of end plate runs through to the lower terminal surface.
The side plates and the connecting piece are made of steel; and/or the end plate is made of aluminum.
Optionally, the first welding wall is welded to one side of the side plate facing the cell array; and/or the side plate is provided with a bent edge attached to the outer side of the second welding wall, and the bent edge is welded to the second welding wall.
Optionally, the turning part is integrally formed on the first welding wall or the second welding wall in a bending mode, the turning part is attached to the end face of the end plate where the locking hole is located, and the turning part is provided with a through hole for the locking piece to penetrate through.
Optionally, the locking member includes a bolt and a nut, the bolt passes through the through hole and the locking hole, and the nut is in threaded connection with the bolt and locked to the lower end surface of the locking hole.
Optionally, the turnover part is integrally formed at the upper end of the first welding wall in a bending mode, the turnover part is perpendicular to the first welding wall and the second welding wall, and the embedding part is integrally formed on one side of the second welding wall.
Optionally, the side plates, the connecting members and the end plates are made of steel;
or; the side plates and the connecting pieces are made of steel, and the end plates are made of aluminum.
Optionally, the cross section of the embedded groove along the first direction is bent, and the shape of the cross section of the embedded portion along the first direction is matched with the shape of the embedded groove.
The utility model also provides a vehicle, the vehicle has foretell battery module.
The utility model provides a battery module and have vehicle of this battery module, the first welding wall and the second welding wall of connecting piece can satisfy different welding demands to the curb plate of difference, the connecting piece be provided with by the retaining member passes and the upset portion of locking. The embedded part can insert the embedded groove along the direction of height, and through the retaining member that sets up upset portion and correspond, can make the connecting piece spacing in longitudinal direction more reliable, even long-term, acutely shake, jolt the environment under, the connecting piece still can be reliably with end plate remain stable to be connected, the battery module meets and is difficult for the roll-off dislocation when vibration is violent from top to bottom, the reliability of battery module is good, and connecting piece and end plate can need not machine tooling, low in production cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic perspective view illustrating a battery module according to an embodiment of the present invention;
fig. 2 is a partially enlarged schematic view of a battery module of fig. 1;
fig. 3 is a schematic exploded perspective view of an end plate, a connecting member and a locking member of a battery module according to an embodiment of the present invention;
fig. 4 is a schematic perspective view illustrating a connecting member in a battery module according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of another view angle of a connecting member in a battery module according to an embodiment of the present invention;
fig. 6 is a schematic perspective view of an end plate in a battery module according to an embodiment of the present invention;
fig. 7 is a top view of an end plate in a battery module according to an embodiment of the present invention;
fig. 8 is a schematic perspective view illustrating an assembled battery module (side plate having a bending edge) according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It should be noted that the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, directly disposed or connected, or indirectly disposed or connected through intervening elements or intervening structures.
In addition, in the embodiments of the present invention, if there are terms of orientation or positional relationship indicated by "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., it is based on the orientation or positional relationship shown in the drawings or the conventional placement state or use state, and it is only for convenience of description and simplification of description, but does not indicate or imply that the structures, features, devices or elements referred to must have a specific orientation or positional relationship, nor must be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The various features and embodiments described in the detailed description may be combined in any suitable manner, for example, different embodiments may be formed by combining different features/embodiments, and various combinations of features/embodiments are not separately described in order to avoid unnecessary repetition in the present disclosure.
As shown in fig. 1 to 4, an embodiment of the present invention provides a battery module, which includes a cell array 90, a side plate 10 and end plates 20, two of the side plates 10 are respectively disposed on two sides of a first direction of the cell array 90 (e.g., two sides of an X direction in fig. 1), two of the end plates 20 are respectively disposed on two sides of a second direction of the cell array 90 (e.g., two sides of a Y direction in fig. 1), the battery module further includes a connecting member 30 and a locking member 40, the connecting member 30 has a first welding wall 31 and a second welding wall 32 perpendicular to each other, the first welding wall 31 is located on an outer side surface of the end plate 20 in the first direction, the second welding wall 32 is located on an outer side surface of the end plate 20 in the second direction, and the side plate 10 is attached and welded to the first welding wall 31 or/and the second welding wall 32 The inner side surfaces are defined by one surfaces of the end plates 20 and the connecting members 30 facing the cell array 90, the outer side surfaces of the side plates 10, the end plates 20 and the connecting members 30 are correspondingly outer side surfaces, the outer side surface of the first welding wall 31 can be a first welding surface 311, the outer side surface of the second welding wall 32 can be a second welding surface 321, the first welding surface 311 can be perpendicular to the second welding surface 321, the connecting members 30 can provide two welding surfaces, and the first welding wall 31 and the second welding wall 32 can meet different welding requirements for different side plates 10. The end plate 20 is provided with and is used for supplying locking member 40 male locking hole 202, the connecting piece 30 is equipped with and is located the upset portion 33 of locking hole 202 top, the retaining member 40 passes upset portion 33 inserts in locking hole 202, with will the connecting piece 30 with the fixed upset portion of end plate 20. Through setting up upset portion 33 and retaining member 40 that corresponds, can make the spacing of connecting piece 30 more reliable, even under long-term, violent vibrations, the jolt environment, connecting piece 30 still can be reliably with end plate 20 remain stable connection, the difficult roll-off dislocation of vibration about the battery module meets when violent, the reliability of battery module is good.
Specifically, the first welding surface 311 on the outer side of the first welding wall 31 is located on the side surface of the battery module in the first direction, the second welding surface 321 on the outer side of the second welding wall 32 is located on the side surface of the battery module in the second direction, and the first welding surface 311 of the first welding wall 31 is welded to the side plate 10 facing the cell array (i.e., the first welding surface 311 is welded to the inner side of the side plate 10), and of course, as another alternative embodiment, the first welding surface 311 may also be optionally welded to the outer side of the side plate 10; as shown in fig. 8, if the side plate 10 has a bent side 11 attached to the outer side (the second welding surface 321) of the second welding wall 32, the bent side 11 can be welded to the second welding surface 321 of the second welding wall 32. The welding can be performed at the first welding wall 31 or the second welding wall 32, or can be performed at the first welding wall 31 or the second welding wall 32 at the same time.
Specifically, the end plate 20 is provided with an insertion groove 201 along a height direction (Z direction in fig. 1), in this embodiment, a first direction, a second direction and a height direction (longitudinal direction) are perpendicular to each other, the connecting member 30 is provided with an insertion portion 34, and the insertion portion 34 is inserted into the insertion groove 201; the embedding part 34 can be inserted into the embedding groove 201 along the height direction, and the assembling is convenient and the structure is reliable.
Specifically, as shown in fig. 5 and 6, each of the end plates 20 is provided with two of the insertion grooves 201, two of the insertion grooves 201 are respectively close to both side ends of the end plate 20 along a first direction (X direction in fig. 1), the insertion grooves 201 are penetrated to a lower end surface along a height direction (Z direction in fig. 1) from the upper end surface of the end plate 20, and the insertion grooves 201 are further communicated with the outer side surface of the end plate 20, that is, each of both sides of the end plate 20 is provided with the connecting member 30 and the corresponding locking member 40.
Specifically, as shown in fig. 1, 6 and 7, each of the end plates 20 is provided with two locking holes 202, the two locking holes 202 are respectively close to two side ends of the end plate 20 along a first direction (X direction in fig. 1), and the locking holes 202 can penetrate from an upper end surface to a lower end surface of the end plate 20. The connecting members 30 and the locking members 40 may be provided in pairs, and in this embodiment, the end plate 20 is provided with two, and the connecting members 30 and the locking members 40 are provided with four, respectively.
The side panels 10 and the connecting members 30 may be made of the same or different materials, and in particular, the end panels 20 may be made of aluminum or other materials, and the side panels may be made of steel or other materials. In this embodiment, the end plate 20 may be an aluminum profile, which has high structural strength and light weight. The side plate 10 can be a steel plate, and the connecting member 30 can be formed by integrally stamping and bending steel, that is, the side plate 10 and the connecting member 30 can be both made of steel so as to be convenient for welding.
Specifically, as shown in fig. 1, 4 and 5, the turned portion 33 is integrally formed on the first welding wall 31 or the second welding wall 32 by bending, in this embodiment, the turned portion 33 is integrally formed on the upper end of the first welding wall 31 by bending, the turned portion 33 is perpendicular to the first welding wall 31 and the second welding wall 32, the embedded portion 34 is integrally formed on one side of the second welding wall 32, the other side of the second welding wall 32 is integrally connected to the first welding wall 31, and a fillet transition may be provided at a connection between the first welding wall 31 and the second welding wall 32 to avoid stress concentration. The upset portion 33 paste in the place on the terminal surface of the locking hole 202 of end plate 20, just the upset portion 33 is provided with and is used for supplying through-hole 331 that retaining member 40 passed, the upset portion 33 can be cyclic annular promptly, and structural reliability is high, and upset portion 33 is difficult to the pine and takes off. It is to be understood that the turning part 33 may have a suitable shape such as a semicircular shape or an open frame shape.
Specifically, as shown in fig. 1 to 4, the locking member 40 includes a bolt 41 and a nut 42, the turning portion 33 is attached to the upper end surface of the locking hole 202, the bolt 41 passes through the through hole 331 and the locking hole 202, the head of the bolt 41 presses the turning portion 33 against the upper end surface of the locking hole 202, the nut 42 is in threaded connection with the bolt 41 and is locked to the lower end surface of the locking hole 202, washers may also be added between the nut 42 and the lower end surface of the locking hole 202 and between the head of the bolt 41 and the turning portion 33, the washers may be elastic washers, and one or more washers may be provided.
Specifically, as shown in fig. 1 to 7, a cross section of the insertion groove 201 in the first direction is bent, and a cross section of the insertion portion 34 in the first direction is matched with the shape of the insertion groove 201. For example, in the present embodiment, the cross section of the insertion groove 201 is "L" shaped, but the cross section of the insertion groove 201 may be "T" shaped, arc-shaped, linear, or the like.
The embodiment of the utility model provides a battery module, through setting up connecting piece 30 as the welding inserts, connecting piece 30 is connected in end plate 20, and connecting piece 30 welds with curb plate 10, realized welded fastening on the basis that the end plate 20 of different materials is connected with curb plate 10, connecting piece 30 can directly adopt punching press technology shaping, the structure is simpler, it is easier to assemble, connecting piece 30 has designed the upset portion 33 that has through-hole 331, and introduce bolt 41 as retaining member 40, when fixing battery module, realize fixing the direction of height (Z to) of connecting piece 30, increased the performance of resisting Z to vibration intensity; the limit convex part is prevented from being arranged on the connecting piece 30, the limit groove is arranged on the end plate 20, and the processing amount is reduced; steel side plates 10 may be used which can withstand greater cell expansion forces.
The utility model also provides a vehicle, the vehicle has foretell battery module. The vehicle can be a pure electric vehicle or a hybrid vehicle and the like.
The embodiment of the utility model provides a battery module and vehicle that has this battery module, battery module has about side (as the X direction in fig. 1), preceding rear end face (as the Y direction in fig. 1) and top surface bottom surface from top to bottom, two curb plates 10 set up in the side about the battery module, two end plates 20 set up the terminal surface around the battery module, four connecting pieces 30 are connected respectively in the left and right sides of two end plates 20, the both ends of curb plate 10 weld respectively in corresponding connecting piece 30, curb plate 10 and end plate 20 surround around electric core array 90. The end plate 20 is provided with an insertion groove 201 and a locking hole 202, and the end plate 20 has a first side surface 203 (corresponding to the side surface of the battery module) and a second side surface 204 (corresponding to the end surface of the battery module) perpendicular to each other. Specifically, the first side 203 and the second side 204 are in contact with the inner side of the first welding wall 31 and the inner side of the second welding wall 32 on the connecting member 30, respectively, to provide support for the welding area. The connection member 30 is assembled by being inserted into the insertion groove 201 of the end plate 20 in the module height direction, and is fixed in the height direction (Z direction) by the bolt 41 (e.g., a bolt of M6). The end plate 20 may be made of extruded aluminum and machined, and the connecting member 30 may be formed by press molding, and is typically made of steel. The connecting member 30 mainly has an insertion portion 34, a first welding surface 311 and a second welding surface 321, and is provided with a turning portion 33 at the top portion perpendicular to the body direction and a through hole 331 at the turning portion 33, wherein the through hole 331 is aligned with the locking hole 202. As shown in fig. 1, the first welding surface 311 and the second welding surface 321 may contact the side plate 10, and both may serve as welding surfaces. When the side plate 10 has no bent side 11, the first welding surface 311 may be used as a welding surface to weld the side surface of the end plate 20 in the first direction. As shown in fig. 8, when the side plate 10 is provided with the bent side 11, the second welding surface 321 may be used as a welding joint surface to weld the side surface of the end plate 20 in the second direction; the insertion portion 34 is inserted into the insertion groove 201, and restrains the expansion of the battery by engaging with the end plate 20. The lower surface of the turnover part 33 is in contact with the end plate 20, and then the connecting member 30 (solder insert) is fixed in the height direction (Z direction in fig. 1) by the bolt 41 through the through hole 331. The connecting piece 30 and the embedded groove 201 have lower requirement on positioning precision and are easy to assemble; the connecting member 30 and the end plate 20 generally do not require additional machining, and the machining process is simple, thereby being beneficial to reducing the cost and improving the production efficiency.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the present invention.
Claims (11)
1. A battery module comprises a battery cell array, side plates and end plates, wherein the side plates are arranged on two sides of a first direction of the battery cell array, the end plates are arranged on two sides of a second direction of the battery cell array, the first direction is perpendicular to the second direction, the battery module is characterized by further comprising a connecting piece and a locking piece, the connecting piece is provided with a first welding wall and a second welding wall which are perpendicular to each other, the first welding wall is located on the outer side surface of the end plate in the first direction, the second welding wall is located on the outer side surface of the end plate in the second direction, and the side plates are attached to and welded with the first welding wall or/and the second welding wall; the end plate is provided with and is used for supplying locking piece male locking hole, the connecting piece is equipped with and is located the upset portion of locking hole top, the retaining member passes upset portion inserts in the locking is downthehole, with incite somebody to action the connecting piece with the end plate is fixed.
2. The battery module as set forth in claim 1, wherein the first welding wall is welded to a side of the side plate facing the cell array; and/or the side plate is provided with a bent edge attached to the outer side of the second welding wall, and the bent edge is welded to the second welding wall.
3. The battery module according to claim 1, wherein the end plates are provided with insertion grooves in a height direction, and the connecting members are provided with insertion portions inserted into the insertion grooves.
4. The battery module according to claim 3, wherein each of the end plates is provided with two of the insertion grooves, the two insertion grooves are respectively close to two ends of the end plate along the first direction, the insertion grooves penetrate from the upper end surface to the lower end surface along the height direction of the end plate, the inner side surface of the end plate faces the cell array, and the insertion grooves are further communicated with the outer side surface of the end plate.
5. The battery module according to claim 1, wherein each of the end plates is provided with two of the locking holes, the two locking holes are respectively adjacent to both ends of the end plate in the first direction, and the locking holes penetrate from the upper end surface to the lower end surface of the end plate.
6. The battery module according to any one of claims 1 to 5, wherein the turnover part is integrally formed on the first welding wall or the second welding wall in a bending manner, the turnover part is attached to the end face of the end plate where the locking hole is located, and the turnover part is provided with a through hole for the locking member to pass through.
7. The battery module according to claim 6, wherein the locking member includes a bolt passing through the through-hole and the locking hole and a nut threadedly coupled to the bolt and locked to a lower end surface of the locking hole.
8. The battery module according to claim 3 or 4, wherein the inverted portion is integrally formed at an upper end of the first welding wall, the inverted portion is perpendicular to the first welding wall and the second welding wall, and the insertion portion is integrally formed at one side of the second welding wall.
9. A battery module according to any one of claims 1 to 5,
the side plates, the connecting pieces and the end plates are made of steel;
or; the side plates and the connecting pieces are made of steel, and the end plates are made of aluminum.
10. The battery module according to claim 3, wherein the insertion groove is bent in a cross-sectional shape in the first direction, and the cross-sectional shape of the insertion portion in the first direction is matched with the shape of the insertion groove.
11. A vehicle characterized by having a battery module according to any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022149078.3U CN213660575U (en) | 2020-09-25 | 2020-09-25 | Battery module and vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022149078.3U CN213660575U (en) | 2020-09-25 | 2020-09-25 | Battery module and vehicle with same |
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| Publication Number | Publication Date |
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| CN213660575U true CN213660575U (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022149078.3U Active CN213660575U (en) | 2020-09-25 | 2020-09-25 | Battery module and vehicle with same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113764809A (en) * | 2021-07-22 | 2021-12-07 | 江苏塔菲尔新能源科技股份有限公司 | Composite end plate, battery module comprising same and energy storage equipment |
| CN115189084A (en) * | 2022-07-21 | 2022-10-14 | 天津市捷威动力工业有限公司 | Battery module end plate, battery module and power battery |
| CN115411441A (en) * | 2022-11-01 | 2022-11-29 | 江苏正力新能电池技术有限公司 | Battery module |
| WO2023134033A1 (en) * | 2022-01-14 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Battery, power consuming device, and battery manufacturing apparatus |
-
2020
- 2020-09-25 CN CN202022149078.3U patent/CN213660575U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113764809A (en) * | 2021-07-22 | 2021-12-07 | 江苏塔菲尔新能源科技股份有限公司 | Composite end plate, battery module comprising same and energy storage equipment |
| WO2023134033A1 (en) * | 2022-01-14 | 2023-07-20 | 宁德时代新能源科技股份有限公司 | Battery, power consuming device, and battery manufacturing apparatus |
| CN115189084A (en) * | 2022-07-21 | 2022-10-14 | 天津市捷威动力工业有限公司 | Battery module end plate, battery module and power battery |
| CN115189084B (en) * | 2022-07-21 | 2023-07-07 | 天津市捷威动力工业有限公司 | Battery module end plate, battery module and power battery |
| CN115411441A (en) * | 2022-11-01 | 2022-11-29 | 江苏正力新能电池技术有限公司 | Battery module |
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