CN108063202B - Battery box - Google Patents
Battery box Download PDFInfo
- Publication number
- CN108063202B CN108063202B CN201711290153.4A CN201711290153A CN108063202B CN 108063202 B CN108063202 B CN 108063202B CN 201711290153 A CN201711290153 A CN 201711290153A CN 108063202 B CN108063202 B CN 108063202B
- Authority
- CN
- China
- Prior art keywords
- box body
- lower box
- mounting
- keel
- module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims abstract description 27
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 17
- 230000003014 reinforcing effect Effects 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 6
- 238000005728 strengthening Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Body Structure For Vehicles (AREA)
Abstract
The invention relates to a battery box body, which comprises an upper cover, a sealing strip, a module and a lower box body, wherein an upper boss and a lower boss are respectively arranged on the upper surface and the lower surface of the sealing strip, mounting angles are arranged on two opposite side surfaces of the module, the mounting angles on the two side surfaces of the module are arranged in a staggered manner, and the horizontal height of the mounting angles and the gravity center of the module are in the same horizontal plane; the lower box body is internally provided with a supporting keel and a mounting bracket with a shape like a Chinese character 'ji', the modules are hoisted between two adjacent mounting brackets in the lower box body, the mounting angles of the two adjacent modules are horizontally staggered and mounted on the mounting brackets, and the sealing strip is arranged between the upper cover and the lower box body and seals the upper cover and the lower box body through bolt connection. According to the invention, the pull-apart damage of moment to the box body is reduced, the volume density of the battery box body is improved by adopting staggered installation, the tightness of the battery box body is improved by designing the boss on the sealing strip, and the structural strength of the battery box body is enhanced by the matched design of the keel and the mounting bracket.
Description
Technical Field
The invention belongs to the technical field of power battery equipment, and particularly relates to a battery box body.
Background
With the increasing maturity and perfection of electric automobile technology, electric automobile is widely used in daily life, and power battery box is as electric automobile's core part, and its manufacturing process includes: a plurality of batteries are connected in series and/or in parallel to form a battery module, and then a plurality of battery modules are connected in series and/or in parallel to form a battery box. Because the electric automobile can not avoid jolting up and down and wading road surfaces when running, two major problems which plague the development of a power battery system are caused: 1. when the electric automobile jolts up and down, the module and the box body are subjected to inertial force, and the current module and the box body are fixed by arranging a mounting angle at the bottom of the module, and the horizontal height of the fixed point and the gravity center of the module are not in the same plane, so that moment caused by the addition of a moment arm is larger, and finally the box body and the module are broken by pulling; 2. when the existing modules are installed in the box body, the installation angles of the adjacent modules are all installed in a butt joint mode, so that the space of the box body is greatly increased, and the improvement of the energy density of the system is not facilitated; 3. at present, most of the sealing of the battery box is achieved by arranging outward flanges at the edges of an upper cover of the battery box and a lower box body of the battery box, sealing gaskets are added between the flanges, the battery box is sealed by fasteners, but the sealing strips are in whole large-plane contact with the upper cover and the lower box body, the sealing performance is poor, and the sealing performance of the battery box body is seriously affected by lower strength of sealing parts.
Patent CN206179912U discloses a battery module fixed knot constructs, and the module fixed subassembly of this patent traverses the whole terminal surface of module, and fixed subassembly design is in the bottom of module or be close to the bottom, and this not only causes box space utilization low, reduces system volume density, and the moment is great extremely easily causes the stretch-breaking of box and module moreover.
Patent CN205452396U discloses a battery box with a waterproof structure, which improves the sealability of the box body of the battery, but the design strength of the box body is lower, and the sealing strip still adopts the whole large plane contact between the upper cover and the lower box body, so that the sealability is poor.
Disclosure of Invention
The invention provides a battery box body, which aims to solve the problems of easy cracking and damage, low volume energy density and poor tightness of the battery box body under the inertia force.
The technical scheme adopted by the invention for realizing the aim is as follows:
a battery box body comprises an upper cover, a sealing strip, a module and a lower box body, and is characterized in that,
an upper boss and a lower boss are respectively arranged on the upper surface and the lower surface of the sealing strip;
the two opposite side surfaces of the module are respectively provided with 2 mounting angles, the mounting angles on the two side surfaces of the module are horizontally staggered, the mounting angles consist of a mounting surface and wedge-shaped edges on two sides of the mounting surface, the mounting surface is provided with a bolt hole A, the wedge-shaped edges are provided with lifting lugs, and the horizontal height of the mounting surface and the gravity center of the module are in the same horizontal plane;
the lower box body is internally provided with a support keel and a mounting bracket, the support keels are arranged on two opposite sides of the bottom of the lower box body, the mounting bracket is welded at the bottom of the lower box body along the direction vertical to the support keels, the mounting bracket is of a shape of a Chinese character 'ji' and is composed of a bracket welding surface, a bracket side surface and a supporting surface, and the supporting surface is provided with a rivet nut A corresponding to a bolt hole A on a mounting angle;
the module is hoisted between two adjacent installing supports in the lower box body, the bottom surface of the module is in direct contact with the bottom surface of the lower box body, the installing angles of two adjacent modules in the direction of the supporting keels are horizontally staggered and arranged above the supporting surfaces of the installing supports, the modules are fixed on the installing supports through bolts, and the sealing strip is arranged between the upper cover and the lower box body and seals the upper cover and the lower box body through the bolts.
The edge of the upper cover is provided with a step structure which is bent downwards twice and turned outwards once, a first upper cover lower bending, an upper cover turned-out edge and a second upper cover lower bending which are connected in sequence are formed, and a bolt hole B is formed in the upper cover turned-out edge.
The sealing strip is also provided with through holes B matched with the bolts, and the number of the upper bosses and the lower bosses is at least 2 respectively and is distributed on two sides of the through holes B.
The edge of the lower box body adopts a semi-closed square structure which is integrally turned inwards, then turned upwards, turned outwards and finally turned downwards, so that a lower box body turned inwards, a lower box body turned upwards, a lower box body turned outwards and a lower box body turned downwards which are sequentially connected are formed, and a rivet nut B matched with a bolt hole B on an upper cover is arranged on the lower box body turned outwards.
And a plurality of lightening holes B are formed in the side face of the support, and the welding face of the support is welded with the bottom face of the lower box body.
The support keel is of a step-shaped structure which is continuously bent for three times, a keel bottom edge, a keel upper bending part, a keel flanging part and a keel second upper bending part which are sequentially connected are formed, the keel bottom edge is welded with the bottom surface of the lower box body, the keel second upper bending part is welded with the side surface of the lower box body, and a plurality of lightening holes A are formed in the keel upper bending part.
The outside of lower box bottom surface is equipped with horizontal strengthening rib and vertical strengthening rib, horizontal strengthening rib sets up with the installing support interval, horizontal strengthening rib is the structure of falling several font, and the everting face on horizontal strengthening rib upper portion welds with lower box bottom, is equipped with lightening hole C on the contact surface of horizontal strengthening rib bottom, the position of vertical strengthening rib corresponds with the supporting joist.
The invention has the beneficial effects that: 1. the mechanical principle and the box body structure are combined, the horizontal height of the fixed point of the module and the box body and the gravity center of the module are arranged on the same plane, so that the tension crack damage of moment arm reduction moment to the box body is reduced; 2. the mounting angles of the two sides of the module are horizontally staggered, and the adjacent modules are staggered to fully utilize the assembly space, so that the volume density of the box body is improved; 3. the boss designed on the sealing strip greatly improves the sealing performance of the box body and has good waterproof effect; 4. the structural strength of the box body, especially the module installation position, is improved through the matching of the keels and the installation brackets in the box body.
Drawings
FIG. 1 is a schematic diagram of an explosive structure according to the present invention;
FIG. 2 is a partial schematic view of the upper cover;
FIG. 3 is a schematic view of a seal strip;
FIG. 4 is a top view of the module;
FIG. 5 is an isometric view of a module;
FIG. 6 is a schematic view of the structure of the mounting angle;
FIG. 7 is a schematic view of the structure of the inside of the lower case;
FIG. 8 is a schematic view of the structure of the outside of the lower case;
FIG. 9 is a top view of the lower housing;
FIG. 10 is a cross-sectional view A-A of the lower case;
FIG. 11 is a schematic view of the welding of the mounting bracket;
FIG. 12 is an isometric view of a mounting bracket;
FIG. 13 is a schematic view of the structure of the transverse stiffener;
FIG. 14 is a D-D sectional view of the lower case;
FIG. 15 is a partial enlarged view of the upper edge of the lower case;
fig. 16 is a schematic structural view of a keel;
FIG. 17 is an isometric view of a misplaced mounting of a module to a mounting bracket;
FIG. 18 is a top view of a staggered mounting of a module to a mounting bracket;
fig. 19 is an enlarged view of a portion of the offset mounting of the module to the mounting bracket.
In the figure: 1. upper cover 2, sealing strip 3, module 4, lower box 11, first upper cover is bent down
12. The upper cover flanging 13, the bolt hole B14, the second upper cover lower bending 21, the upper boss 22 and the lower boss
23. Through hole B31, mounting angle 311, mounting surface 312, bolt hole A313, wedge edge 314 and lifting lug
41. Support keel 42, mounting bracket 43, transverse reinforcing rib 44, vertical reinforcing rib 45 and lower box inner flanging
46. Lower box upper bend 47, lower box outer flange 48, lower box lower bend 49 pull rivet nut B
411. Keel bottom edge 412, keel upper bend 413, lightening hole A414, keel flanging
415. The keel is second upper bend 421, the bracket welding surface 422, the bracket side surfaces 423 and the supporting surface
424. Rivet nut a 425, lightening hole B431, eversion 432, contact surface 433, lightening hole C.
Detailed Description
The invention provides a battery box body, which aims to solve the problems of easy cracking and damage, low volume energy density and poor tightness of the battery box body under the inertia force. The invention is further elucidated below in connection with the drawings.
As shown in fig. 1, a battery case includes an upper cover (1), a sealing strip (2), a module (3), and a lower case (4).
As shown in fig. 2, the edge of the upper cover (1) has a step structure of twice bending downwards and once flanging outwards, so as to form a first upper cover bending downwards (11), an upper cover flanging (12) and a second upper cover (1) which are connected in sequence, and a bolt hole B (13) is arranged on the upper cover flanging (12).
As shown in fig. 3, the upper and lower surfaces of the sealing strip (2) are respectively provided with an upper boss (21) and a lower boss (22), the sealing strip (2) is also provided with a through hole B (23), and at least 2 upper bosses (21) and lower bosses (22) are respectively distributed on two sides of the through hole B (23).
As shown in fig. 4, 2 mounting angles (31) are respectively arranged on two opposite side surfaces of the module (3), the mounting angles (31) on two side surfaces of the module (3) are horizontally staggered, as shown in fig. 5 and 6, the mounting angles (31) are composed of a mounting surface (311) and wedge-shaped edges (313) on two sides of the mounting surface (311), bolt holes A (312) are formed in the mounting surface (311), lifting lugs (314) are arranged on the wedge-shaped edges (313), and the horizontal height of the mounting surface (311) and the gravity center of the module (3) are in the same horizontal plane.
As shown in fig. 7, a supporting keel (41) and a mounting bracket (42) are arranged in the lower box body (4), the supporting keel (41) is arranged on two opposite sides of the bottom of the lower box body (4), the mounting bracket (42) is welded on the bottom of the lower box body (4) along the direction perpendicular to the supporting keel (41), as shown in fig. 8, a transverse reinforcing rib (43) and a vertical reinforcing rib (44) are arranged on the outer side of the bottom surface of the lower box body (4), as shown in fig. 10, the transverse reinforcing rib (43) and the mounting bracket (42) are arranged at intervals, as shown in fig. 11 and 12, the mounting bracket (42) is in a shape of a Chinese character 'ji' composed of a bracket welding surface (421), a bracket side surface (422) and a supporting surface (423), a pulling nut A (424) corresponding to a bolt hole A (312) on a mounting angle (31) is arranged on the supporting surface (423), and a plurality of lightening holes B (425) are arranged on the bracket side surface (422), and the bracket welding surface (421) and the bottom surface of the lower box body (4) are riveted.
As shown in fig. 13, the transverse reinforcing rib (43) has an inverted-v-shaped structure, an everting surface (431) at the upper part of the transverse reinforcing rib (43) is welded with the bottom of the lower box body (4), and a weight reducing hole C (433) is arranged on a contact surface (432) at the bottom of the transverse reinforcing rib (43).
As shown in fig. 14 and 15, the edge of the lower box body (4) adopts a semi-closed mouth-shaped structure that the whole is turned inwards, then turned outwards and finally turned downwards, so as to form a lower box body turned inwards (45), a lower box body turned upwards (46), a lower box body turned outwards (47) and a lower box body turned downwards (48) which are connected in sequence, and a rivet nut B (49) matched with the bolt hole B (13) on the upper cover (1) is arranged on the lower box body turned inwards (47).
As shown in fig. 14, the position of the vertical reinforcing rib (44) corresponds to that of the supporting keel (41), as shown in fig. 16, the supporting keel (41) is of a step-shaped structure which is continuously bent three times, a keel bottom edge (411), a keel upper bending (412), a keel flanging (414) and a keel second upper bending (415) which are sequentially connected are formed, the keel bottom edge (411) is welded with the bottom surface of the lower box body (4), the keel second upper bending (415) is welded with the side surface of the lower box body (4), and a plurality of lightening holes A (413) are formed in the keel upper bending (412).
As shown in fig. 17, 18 and 19, the module (3) is hoisted between two adjacent mounting brackets (42) in the lower box body (4), the bottom surface of the module (3) is in direct contact with the bottom surface of the lower box body (4), the mounting angles (31) of two adjacent modules (3) along the direction of the supporting keels (41) are horizontally staggered above the supporting surfaces (423) of the mounting brackets (42), the module (3) is fixed on the mounting brackets (42) through bolts, and the sealing strip (2) is arranged between the upper cover (1) and the lower box body (4) and seals the upper cover (1) and the lower box body (4) through bolt connection.
The invention has the beneficial effects that: 1. the mechanical principle and the box body structure are combined, the horizontal height of the fixed point of the module and the box body and the gravity center of the module are arranged on the same plane, so that the tension crack damage of moment arm reduction moment to the box body is reduced; 2. the mounting angles of the two sides of the module are horizontally staggered, and the adjacent modules are staggered to fully utilize the assembly space, so that the volume density of the box body is improved; 3. the boss designed on the sealing strip greatly improves the sealing performance of the box body and has good waterproof effect; 4. the structural strength of the box body, especially the module installation position, is improved through the matching of the keels and the installation brackets in the box body.
Claims (4)
1. The battery box body comprises an upper cover (1), a sealing strip (2), a module (3) and a lower box body (4), and is characterized in that an upper boss (21) and a lower boss (22) are respectively arranged on the upper surface and the lower surface of the sealing strip (2); 2 mounting angles (31) are respectively arranged on two opposite side surfaces of the module (3), the mounting angles (31) on the two side surfaces of the module (3) are horizontally staggered, the mounting angles (31) are composed of a mounting surface (311) and wedge-shaped edges (313) on two sides of the mounting surface (311), bolt holes A (312) are formed in the mounting surface (311), lifting lugs (314) are arranged on the wedge-shaped edges (313), and the horizontal height of the mounting surface (311) and the gravity center of the module (3) are in the same horizontal plane; the lower box body (4) is internally provided with a supporting keel (41) and a mounting bracket (42), the supporting keel (41) is arranged on two opposite sides of the bottom of the lower box body (4), the mounting bracket (42) is welded at the bottom of the lower box body (4) along the direction perpendicular to the supporting keel (41), the mounting bracket (42) is of a shape of a Chinese character 'ji' and is composed of a bracket welding surface (421), a bracket side surface (422) and a supporting surface (423), and the supporting surface (423) is provided with a rivet nut A (424) corresponding to the bolt hole A (312) on the mounting angle (31); the module (3) is hoisted between two adjacent mounting brackets (42) in the lower box body (4), the bottom surface of the module (3) is in direct contact with the bottom surface of the lower box body (4), the mounting angles (31) of the two adjacent modules (3) along the direction of the supporting keels (41) are horizontally staggered above the supporting surfaces (423) of the mounting brackets (42), the module (3) is fixed on the mounting brackets (42) through bolts, and the sealing strip (2) is arranged between the upper cover (1) and the lower box body (4) and is connected with the upper cover (1) and the lower box body (4) through bolts;
the edge of the upper cover (1) is provided with a step structure which is bent downwards twice and turned outwards once, a first upper cover lower bent part (11), an upper cover turned-out edge (12) and a second upper cover (1) which are connected in sequence are formed, and a bolt hole B (13) is formed in the upper cover turned-out edge (12);
the edge of the lower box body (4) adopts a semi-closed square structure which is integrally turned inwards, then turned upwards, turned outwards and finally turned downwards, and the lower box body internal turned edge (45), the lower box body upper turned edge (46), the lower box body external turned edge (47) and the lower box body lower turned edge (48) which are sequentially connected are formed, and the lower box body external turned edge (47) is provided with a rivet nut B (49) matched with the bolt hole B (13) on the upper cover (1).
2. A battery box according to claim 1, wherein the bracket side (422) is provided with a plurality of lightening holes B (425), and the bracket welding surface (421) is welded to the bottom surface of the lower box (4).
3. A battery box according to claim 1, wherein the supporting keel (41) is of a step-shaped structure which is continuously bent three times, a keel bottom edge (411), a keel upper bending (412), a keel flanging (414) and a keel second upper bending (415) which are sequentially connected are formed, the keel bottom edge (411) is welded with the bottom surface of the lower box (4), the keel second upper bending (415) is welded with the side surface of the lower box (4), and a plurality of lightening holes a (413) are formed in the keel upper bending (412).
4. The battery box body according to claim 1, wherein a transverse reinforcing rib (43) and a vertical reinforcing rib (44) are arranged on the outer portion of the bottom surface of the lower box body (4), the transverse reinforcing rib (43) and the mounting bracket (42) are arranged at intervals, the transverse reinforcing rib (43) is of an inverted-V-shaped structure, an eversion surface (431) on the upper portion of the transverse reinforcing rib (43) is welded with the bottom of the lower box body (4), a lightening hole C (433) is formed in a contact surface (432) on the bottom of the transverse reinforcing rib (43), and the position of the vertical reinforcing rib (44) corresponds to that of the supporting keel (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711290153.4A CN108063202B (en) | 2017-12-08 | 2017-12-08 | Battery box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711290153.4A CN108063202B (en) | 2017-12-08 | 2017-12-08 | Battery box |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108063202A CN108063202A (en) | 2018-05-22 |
| CN108063202B true CN108063202B (en) | 2023-11-14 |
Family
ID=62135475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711290153.4A Active CN108063202B (en) | 2017-12-08 | 2017-12-08 | Battery box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108063202B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209183581U (en) * | 2018-12-29 | 2019-07-30 | 宁德时代新能源科技股份有限公司 | Battery case |
| CN109587991A (en) * | 2019-01-02 | 2019-04-05 | 南京创源天地动力科技有限公司 | A kind of new energy box body sealing structure |
| CN109888148A (en) * | 2019-04-10 | 2019-06-14 | 江西安驰新能源科技有限公司 | A kind of Battery case |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015023029A (en) * | 2013-07-22 | 2015-02-02 | 新普科技股▲分▼有限公司 | Battery module-sealed structure |
| CN204441346U (en) * | 2014-12-31 | 2015-07-01 | 重庆长安汽车股份有限公司 | A kind of battery modules fixed frame |
| CN105609680A (en) * | 2016-03-02 | 2016-05-25 | 合肥国轩高科动力能源有限公司 | Battery box with waterproof structure |
| CN205452396U (en) * | 2016-03-02 | 2016-08-10 | 合肥国轩高科动力能源有限公司 | Battery box with waterproof construction |
| CN207624760U (en) * | 2017-12-08 | 2018-07-17 | 江西安驰新能源科技有限公司 | A kind of Battery case for preventing drawing crack from destroying |
-
2017
- 2017-12-08 CN CN201711290153.4A patent/CN108063202B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015023029A (en) * | 2013-07-22 | 2015-02-02 | 新普科技股▲分▼有限公司 | Battery module-sealed structure |
| CN204441346U (en) * | 2014-12-31 | 2015-07-01 | 重庆长安汽车股份有限公司 | A kind of battery modules fixed frame |
| CN105609680A (en) * | 2016-03-02 | 2016-05-25 | 合肥国轩高科动力能源有限公司 | Battery box with waterproof structure |
| CN205452396U (en) * | 2016-03-02 | 2016-08-10 | 合肥国轩高科动力能源有限公司 | Battery box with waterproof construction |
| CN207624760U (en) * | 2017-12-08 | 2018-07-17 | 江西安驰新能源科技有限公司 | A kind of Battery case for preventing drawing crack from destroying |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108063202A (en) | 2018-05-22 |
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