CN204333071U - For battery casing assembly and there is its battery - Google Patents
For battery casing assembly and there is its battery Download PDFInfo
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- CN204333071U CN204333071U CN201420827616.1U CN201420827616U CN204333071U CN 204333071 U CN204333071 U CN 204333071U CN 201420827616 U CN201420827616 U CN 201420827616U CN 204333071 U CN204333071 U CN 204333071U
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- battery
- cover plate
- casing assembly
- internal layer
- casing
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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
Utility model discloses a kind of casing assembly for battery and has its battery, and the described casing assembly for battery comprises: battery container and cover plate.The open at one end of battery container and the other end are closed, battery container comprises outer casing and internal layer shell, internal layer shell nested arrangement is in outer casing, and it is spaced apart between internal layer shell and outer casing, and between internal layer shell and outer casing, limit the first insulated space of sealing, for vacuum or be filled with insulation medium in the first insulated space.One end that cover plate capping battery container opens wide.According to the casing assembly for battery of the present utility model, decrease the temperature of the inner space of extraneous environmental impact casing assembly, be supplied to a good running environment to parts such as the pole pieces be arranged in casing assembly.
Description
Technical field
The utility model relates to energy technology field, particularly a kind of casing assembly for battery and have the battery of this casing assembly.
Background technology
In the use procedure of battery, the impact of temperature on the life-span of battery and energy conversion rate is larger, battery be easy to when working at too high or too low temperature to cause the lost of life of battery or energy conversion rate low, reason is the performance of the battery core of too high or too low ambient temperature effect battery.There is the shortcomings such as heat insulation effect difference or complex structure in the battery of correlation technique.
Utility model content
The utility model is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, the utility model is to propose a kind of casing assembly for battery, and heat-proof quality is good.
According to the casing assembly for battery of the present utility model, comprising: battery container and cover plate.The open at one end of described battery container and the other end are closed, described battery container comprises outer casing and internal layer shell, described internal layer shell nested arrangement is in described outer casing, and it is spaced apart between described internal layer shell and described outer casing, and between described internal layer shell and described outer casing, limit the first insulated space of sealing, for vacuum or be filled with insulation medium in described first insulated space.One end that battery container described in described cover plate capping opens wide.
According to the casing assembly for battery of the present utility model, battery container is double Shell, and in this double Shell, form vacuum or stuffed heat insulated medium.Therefore, casing assembly is made to have good heat-proof quality, decrease the temperature of the inner space of extraneous environmental impact casing assembly, a good running environment is supplied to parts such as the pole pieces be arranged in casing assembly, make the battery with this casing assembly have extremely wide serviceability temperature scope, and also can keep good chemical property under extreme severe cold or extreme hot environment.
In addition, the casing assembly for battery above-mentioned according to the utility model, can also have following additional technical characteristic:
Described cover plate comprises outer cover plate and internal layer cover plate, described outer cover plate and described internal layer cover plate spaced apart, and limit the second insulated space between described outer cover plate and described internal layer cover plate, for vacuum or be filled with insulation medium in described second insulated space.
Liquefied ammonia is filled with in described second insulated space.
Ringwise, and described cover plate is provided with rivet to described cover plate, and described rivet and described cover plate are riveted and closed the central through hole of described cover plate.
Week of the open end of described battery container along and described cover plate by laser welding to seal the gap between described battery container and described cover plate.
Liquefied ammonia is filled with in described first insulated space.
Described battery container also comprises closed-loop, described outer casing and described internal layer shell be one end close and the other end open wide cylindrical shape, the week of the inner edge of described closed-loop and the open end of described internal layer shell, the periphery of described closed-loop was along the week with the open end of described outer casing along being tightly connected along being tightly connected.
The utility model also proposed a kind of battery, and comprise casing assembly, be sealed in pole piece in described casing assembly and electrolyte, described casing assembly is the aforesaid casing assembly for battery of the utility model.Battery of the present utility model have employed the aforesaid casing assembly for battery of the utility model, and battery container adopts double Shell, and in this double Shell, form vacuum or stuffed heat insulated medium.Therefore, casing assembly is made to have good heat-proof quality, decrease extraneous ambient temperature to the impact of pole piece etc., thus make to be arranged in the parts such as the pole piece in casing assembly there is a good running environment, make battery have extremely wide serviceability temperature scope, and also can keep good chemical property under extreme severe cold or extreme hot environment.
Described battery also comprises battery spacer ring, and described battery spacer ring to be located in described casing assembly and to limit container cavity in described casing assembly.
Described pole piece is located in described container cavity.
Described pole piece is formed by multiple single-stage core parallel combination or is formed by multiple single-stage core tandem compound.
Described electrolyte is filled in described container cavity.
The positive pole ear of described battery and negative lug are all connected on by supersonic welding on the cover plate of described casing assembly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the casing assembly for battery of the utility model embodiment.
Fig. 2 is the schematic diagram of the battery of the utility model embodiment.
Fig. 3 is the casing assembly of the battery of the utility model embodiment and the schematic diagram of battery spacer ring cooperation.
Fig. 4 is the result schematic diagram that embodiment 1 of the present utility model, embodiment 2, embodiment 3 and the battery shown in comparative example carry out high temperature circulation test.
Fig. 5 is the result schematic diagram that embodiment 1 of the present utility model, embodiment 2, embodiment 3 and the battery shown in comparative example carry out low-temperature circulating test.
Reference numeral: casing assembly 1, battery container 11, outer casing 111, internal layer shell 112, closed-loop 113, the first insulated space 101, cover plate 12, outer cover plate 121, internal layer cover plate 122, second insulated space 102, rivet 13, battery 100, battery spacer ring 2, pole piece 3, electrolyte 4, container cavity 103.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
As shown in Figure 1, according to the casing assembly 1 for battery of the utility model embodiment, comprising: battery container 11 and cover plate 12.
Specifically, the open at one end of battery container 11 and the other end are closed, battery container 11 comprises outer casing 111 and internal layer shell 112, internal layer shell 112 nested arrangement is in outer casing 111, and it is spaced apart between internal layer shell 112 and outer casing 111, and for vacuum or be filled with insulation medium in the first insulated space 101, first insulated space 101 limiting sealing between internal layer shell 112 and outer casing 111.One end that cover plate 12 capping battery container 11 opens wide.Thus the cavity of a sealing in being limited by cover plate 12 and battery container 11.
According to the casing assembly 1 for battery of the utility model embodiment, battery container is double Shell, and in this double Shell, form vacuum or stuffed heat insulated medium.Therefore, casing assembly 1 is made to have good heat-proof quality, decrease the temperature of the inner space of extraneous environmental impact casing assembly 1, a good running environment is supplied to parts such as the pole pieces be arranged in casing assembly 1, make the battery with this casing assembly 1 have extremely wide serviceability temperature scope, and also can keep good chemical property under extreme severe cold or extreme hot environment.
As shown in Figure 1, in embodiments more of the present utility model, also cover plate 12 can be arranged to the form of bilayer or multilayer cover plate, specifically, cover plate 12 comprises outer cover plate 121 and internal layer cover plate 122, outer cover plate 121 and internal layer cover plate 122 spaced apart, and to limit in the second insulated space 102, second insulated space 102 as vacuum between outer cover plate 121 and internal layer cover plate 122 or be filled with insulation medium.Cover plate 12 is made also to be provided with good heat-proof quality.
In conjunction with embodiment battery container 11 being arranged to double Shell, whole wall of casing assembly 1 is made all to be arranged to the form of bilayer or multilayer, and in the wall of casing assembly 1, be formed as vacuum or be filled with the insulated space of insulation medium, can effectively reduce the impact of external environment on the inner space of casing assembly 1 further.
Advantageously, liquefied ammonia is filled with in the second insulated space 102.Owing to being filled with liquefied ammonia, the problem of the pressure substantially exceeding the inner space of the second insulated space 102 due to ambient pressure environment can be avoided, not only can reduce the thickness of outer cover plate 121 and internal layer cover plate 122 to reduce consumptive material, but also the production of cover plate 12 can be facilitated, and improve the stability of cover plate 12.
Further, as shown in Figure 1, ringwise, and cover plate 12 is provided with rivet 13 to cover plate 12, and the central through hole of also closed cover 12 rivet by rivet 13 and cover plate 12.Therefore, the connection between cover plate 12 and battery container 11 can be facilitated, and improve the production efficiency with the battery of this casing assembly 1.
Preferably, the open end of battery container 11 week along and cover plate 12 by laser welding with the gap between sealed cell housing 11 and cover plate 12.Improve the sealing property of the junction of battery container 11 and cover plate 12.
In embodiments more of the present utility model, in the first insulated space 101, be filled with liquefied ammonia.Owing to being filled with liquefied ammonia, the problem of the pressure substantially exceeding the inner space of the first insulated space 101 due to ambient pressure environment can be avoided, not only can reduce the thickness of outer casing 111 and internal layer shell 112 to reduce consumptive material, but also the production of battery container 11 can be facilitated, and improve the stability of battery container 11.
As shown in Figure 1, in embodiments more of the present utility model, battery container 11 also comprises closed-loop 113, outer casing 111 and internal layer shell 112 be one end close and the other end open wide cylindrical shape, the week of the inner edge of closed-loop 113 and the open end of internal layer shell 112, the periphery of closed-loop 113 was along the week with the open end of outer casing 111 along being tightly connected along being tightly connected.Make the structure of battery container 11 simple, and make the good sealing effect of the first insulated space 101.
As shown in Figures 2 and 3, the utility model also proposed a kind of battery 100, comprising: casing assembly 1, be sealed in pole piece in casing assembly 1 and electrolyte, and casing assembly 1 is the casing assembly for battery according to the utility model previous embodiment.Battery 100 of the present utility model have employed the casing assembly 1 for battery described in the utility model previous embodiment, and battery container adopts double Shell, and in this double Shell, form vacuum or stuffed heat insulated medium.Therefore, casing assembly 1 is made to have good heat-proof quality, decrease extraneous ambient temperature to the impact of pole piece etc., thus make to be arranged in the parts such as the pole piece in casing assembly 1 there is a good running environment, make battery 100 have extremely wide serviceability temperature scope, and also can keep good chemical property under extreme severe cold or extreme hot environment.
In embodiments more of the present utility model, battery 100 also comprises battery spacer ring 2, and battery spacer ring 2 to be located in casing assembly 1 and to limit container cavity 103 in casing assembly 1.
Further, pole piece 3 is located in container cavity.
Advantageously, electrolyte 4 is filled in container cavity 103.
Pole piece 3 is formed by multiple single-stage core parallel combination or is formed by multiple single-stage core tandem compound.Such as, pole piece 3 is formed by four single-stage core parallel combinations.
Further, the positive pole ear of battery 100 and negative lug all by ultrasonic bonding on the cover plate 12 of casing assembly 11.
The utility model provides a kind of battery 100 with extremely wide serviceability temperature scope, this battery 100 is preferably lithium ion battery, described battery 100 can keep good chemical property under extreme severe cold or extreme hot environment, and has excellent useful life.Below by specific embodiment exemplarily and by reference to the accompanying drawings the utility model is described in further detail.
Embodiment 1: as shown in Figure 1, described battery 100 comprises battery container 11, cover plate 12, battery spacer ring 2, pole piece 3, electrolyte 4 etc., and wherein, battery container 11 is connected in laser welding mode with cover plate 12.Cover plate 12 is by outer cover plate 121 and internal layer cover plate 122 and run through outer cover plate 121 and combine 11 with the rivet 13 of internal layer cover plate 122 and form, the second insulated space 102, the second insulated space 102 for closing between outer cover plate 121 and internal layer cover plate 122 is interior is vacuum.Internal layer cover plate 122, outer cover plate 121 and rivet 13 adopt the mode of riveting to link together, and ensure the sealing between rivet 13 and internal layer cover plate 122, outer cover plate 121.Battery container 11 comprises outer casing 111 and internal layer shell 112, it is the first insulated space 101 between outer casing 111 and internal layer shell 112, be vacuum in first insulated space 101, and the outer surface of the inner surface of internal layer shell 112 and outer casing 111 all carry out Passivation Treatment.Pole piece 3 is 4 one pole cores, and parallel combination forms, and the both positive and negative polarity lug of pole piece is welded on cover plate combination part 1 by ultrasonic wave respectively; Each one pole core comprises positive plate, negative plate, diaphragm paper; Described positive plate comprises aluminium foil and is coated in the positive active material of aluminium foil surface; Described negative plate comprises Copper Foil and is coated in the negative electrode active material of copper foil surface.
Embodiment 2: battery 100 and the previous embodiment 1 of this embodiment are individual layer unlike cover plate 12, and on single laying of plank covering 12, riveted joint has rivet.
Embodiment 3: the battery 100 of this embodiment and previous embodiment 2 unlike, the first insulated space 101 is filled by by the liquefied ammonia compressed.
Comparative example (comparative example): the battery 100 of comparative example as different from Example 1: battery container is single hull, and Passivation Treatment is carried out on the surface, inner side and outer side of housing, and cover plate is riveted by single laying of plank covering and rivet combination and formed.
For studying this battery chemical property at different ambient temperatures, to the above embodiments and comparative example, temperature shock test (table 1), high temperature circulation test (Fig. 4), low-temperature circulating test (Fig. 5) are carried out respectively to the battery of aforesaid embodiment and comparative example.Wherein following table 1 illustrates the test result of temperature shock test.
Specifically, temperature shock: battery is placed in temperature shock case after being full of electricity with SEC standard charging pattern, keeps after 2 hours, keeps 2 hours, and then get back to-40 DEG C, and repeat 20 times under 85 DEG C of environment under-40 DEG C of environment.
High temperature circulation: lithium ion battery is placed after more than 24 hours under 75 DEG C of environment, carries out charge/discharge cycle with the electric current of 1C.
Low-temperature circulating: lithium ion battery is placed after more than 24 hours under-40 DEG C of environment, carries out charge/discharge cycle with the electric current of 0.1C.
Table 1 temperature shock test result
The technical scheme that the utility model adopts directly uses the structural member with double Shell, instead of at the additional servicing unit of battery, fundamentally solve ambient temperature to the impact of battery.Adopt in this way, there is lower input, and the available temperature range of lithium ion battery can be promoted greatly.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In description of the present utility model, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, the concrete meaning of above-mentioned term in the utility model can be understood as the case may be.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present utility model or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment, revises, replace and modification in scope of the present utility model.
Claims (13)
1. for a casing assembly for battery, it is characterized in that, comprising:
Battery container, the open at one end of described battery container and the other end are closed, described battery container comprises outer casing and internal layer shell, described internal layer shell nested arrangement is in described outer casing, and it is spaced apart between described internal layer shell and described outer casing, and between described internal layer shell and described outer casing, limit the first insulated space of sealing, for vacuum or be filled with insulation medium in described first insulated space;
Cover plate, one end that battery container described in described cover plate capping opens wide.
2. the casing assembly for battery according to claim 1, it is characterized in that, described cover plate comprises outer cover plate and internal layer cover plate, described outer cover plate and described internal layer cover plate spaced apart, and limit the second insulated space between described outer cover plate and described internal layer cover plate, for vacuum or be filled with insulation medium in described second insulated space.
3. the casing assembly for battery according to claim 2, is characterized in that, is filled with liquefied ammonia in described second insulated space.
4. the casing assembly for battery according to any one of claim 1-3, is characterized in that, ringwise, and described cover plate is provided with rivet to described cover plate, and described rivet and described cover plate are riveted and closed the central through hole of described cover plate.
5. the casing assembly for battery according to any one of claim 1-3, is characterized in that, week of the open end of described battery container along and described cover plate by laser welding to seal the gap between described battery container and described cover plate.
6. the casing assembly for battery according to claim 1, is characterized in that, is filled with liquefied ammonia in described first insulated space.
7. the casing assembly for battery according to claim 1, it is characterized in that, described battery container also comprises closed-loop, described outer casing and described internal layer shell be one end close and the other end open wide cylindrical shape, the week of the inner edge of described closed-loop and the open end of described internal layer shell, the periphery of described closed-loop was along the week with the open end of described outer casing along being tightly connected along being tightly connected.
8. a battery, is characterized in that, comprise casing assembly, be sealed in pole piece in described casing assembly and electrolyte, described casing assembly is the casing assembly for battery according to any one of claim 1-7.
9. battery according to claim 8, is characterized in that, described battery also comprises battery spacer ring, and described battery spacer ring to be located in described casing assembly and to limit container cavity in described casing assembly.
10. battery according to claim 9, is characterized in that, described pole piece is located in described container cavity.
11. batteries according to claim 10, is characterized in that, described pole piece is formed by multiple single-stage core parallel combination or formed by multiple single-stage core tandem compound.
12. batteries according to claim 9, is characterized in that, described electrolyte is filled in described container cavity.
13. batteries according to claim 8, is characterized in that, the positive pole ear of described battery and negative lug are all connected on by supersonic welding on the cover plate of described casing assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420827616.1U CN204333071U (en) | 2014-12-23 | 2014-12-23 | For battery casing assembly and there is its battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420827616.1U CN204333071U (en) | 2014-12-23 | 2014-12-23 | For battery casing assembly and there is its battery |
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| CN204333071U true CN204333071U (en) | 2015-05-13 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914317A (en) * | 2016-06-12 | 2016-08-31 | 长沙巨力电子科技股份有限公司 | High-altitude power supply system |
| CN110165091A (en) * | 2018-05-16 | 2019-08-23 | 北京机电工程研究所 | Thermal cell outer housing and thermal cell |
| CN111477792A (en) * | 2020-04-15 | 2020-07-31 | 中车资阳机车有限公司 | Battery pack of battery system of hybrid power locomotive and battery system |
| WO2020156334A1 (en) * | 2019-01-31 | 2020-08-06 | 武汉科技大学 | Metal-material heat insulation device and heat insulation method |
| CN111525049A (en) * | 2020-05-09 | 2020-08-11 | 中国工程物理研究院电子工程研究所 | Aerogel type heat preservation shell embedded in vacuum cavity for thermal battery and application of aerogel type heat preservation shell |
| CN111540920A (en) * | 2020-05-09 | 2020-08-14 | 中国工程物理研究院电子工程研究所 | Thermal battery vacuum full-coverage type heat insulation structure and application thereof |
| CN112993449A (en) * | 2019-12-16 | 2021-06-18 | 本田技研工业株式会社 | Accumulator battery |
| WO2023092529A1 (en) * | 2021-11-29 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Housing and manufacturing method and system therefor, battery cell, battery, and electrical device |
| WO2023097911A1 (en) * | 2021-11-30 | 2023-06-08 | 苏州中科瑞龙科技有限公司 | Low-temperature-resistant stainless steel lithium battery casing |
-
2014
- 2014-12-23 CN CN201420827616.1U patent/CN204333071U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105914317A (en) * | 2016-06-12 | 2016-08-31 | 长沙巨力电子科技股份有限公司 | High-altitude power supply system |
| CN110165091A (en) * | 2018-05-16 | 2019-08-23 | 北京机电工程研究所 | Thermal cell outer housing and thermal cell |
| WO2020156334A1 (en) * | 2019-01-31 | 2020-08-06 | 武汉科技大学 | Metal-material heat insulation device and heat insulation method |
| CN112993449A (en) * | 2019-12-16 | 2021-06-18 | 本田技研工业株式会社 | Accumulator battery |
| CN111477792A (en) * | 2020-04-15 | 2020-07-31 | 中车资阳机车有限公司 | Battery pack of battery system of hybrid power locomotive and battery system |
| CN111477792B (en) * | 2020-04-15 | 2022-08-09 | 中车资阳机车有限公司 | Battery pack of battery system of hybrid power locomotive and battery system |
| CN111525049A (en) * | 2020-05-09 | 2020-08-11 | 中国工程物理研究院电子工程研究所 | Aerogel type heat preservation shell embedded in vacuum cavity for thermal battery and application of aerogel type heat preservation shell |
| CN111540920A (en) * | 2020-05-09 | 2020-08-14 | 中国工程物理研究院电子工程研究所 | Thermal battery vacuum full-coverage type heat insulation structure and application thereof |
| CN111525049B (en) * | 2020-05-09 | 2022-08-02 | 中国工程物理研究院电子工程研究所 | Aerogel type heat preservation shell embedded in vacuum cavity for thermal battery and application of aerogel type heat preservation shell |
| WO2023092529A1 (en) * | 2021-11-29 | 2023-06-01 | 宁德时代新能源科技股份有限公司 | Housing and manufacturing method and system therefor, battery cell, battery, and electrical device |
| WO2023097911A1 (en) * | 2021-11-30 | 2023-06-08 | 苏州中科瑞龙科技有限公司 | Low-temperature-resistant stainless steel lithium battery casing |
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