CN113140861B - Battery case and battery pack - Google Patents
Battery case and battery pack Download PDFInfo
- Publication number
- CN113140861B CN113140861B CN202110443615.1A CN202110443615A CN113140861B CN 113140861 B CN113140861 B CN 113140861B CN 202110443615 A CN202110443615 A CN 202110443615A CN 113140861 B CN113140861 B CN 113140861B
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- battery pack
- frame
- battery
- cavity
- sealing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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 invention relates to the field of electric automobiles, in particular to a battery pack shell and a battery pack for balancing pressure of a power battery pack and preventing condensation. The battery pack shell consists of a battery tray, an upper cover, a connecting piece, an explosion-proof vent valve and a sealing piece; the anti-explosion vent valve is characterized in that a sealing element is arranged on the mounting surface of the anti-explosion vent valve, the sealing element is mounted on the rear end plane of the battery tray and realizes the sealing of a matching interface, the upper cover is mounted on the battery tray through a connecting piece, the sealing of the matching interface is realized through the sealing element, and the inner cavity of the battery pack shell can only exchange gas with the outside through the anti-explosion vent valve. The explosion-proof ventilation valve plays a role in gas exchange so that the air pressure of the inner cavity of the rear frame is equal to the air pressure outside the battery shell. The invention has the advantages of stable performance and low cost.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a battery pack shell and a battery pack for balancing pressure of a power battery pack and preventing condensation.
Background
In order to ensure the service life and safety of the power battery, the power battery pack installed outside the passenger compartment of the electric vehicle needs to have good waterproof and dustproof performances, and a sealed space is usually constructed for the power battery by a shell component and a sealing element; due to the influence of factors such as heating of a battery core and change of the external environment of the whole vehicle in the charging and discharging processes of the battery, the sealed battery pack can ensure the balance of the internal and external pressures of the box body only by realizing breathing with the outside, so that the reliability of a sealing structure is ensured; in the prior art, the exchange of gas inside and outside a battery pack is generally realized by adopting a waterproof breathable film, and although the waterproof breathable film can prevent liquid water from entering the battery pack, the waterproof breathable film cannot prevent external water vapor from entering the battery pack; condensation can be generated along with the reduction of the temperature of the battery pack under the condition of high air humidity inside the battery pack, so that corrosion and insulation problems and even short circuit risks are brought;
CN107994181A proposes a ventilation valve solution with a desiccant, which absorbs water vapor in the battery pack, but needs to detect the state of the desiccant and replace the desiccant periodically, resulting in cumbersome operation and high use cost.
CN211480119U proposes to integrate the evaporimeter at battery package breather valve, for the gas dehumidification in battery package breathing range, has the problem that the structure is complicated and with high costs.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a battery pack shell which can balance air pressure and prevent external water vapor from entering, and provides a battery pack with the shell, so that the pressure difference between the inside and the outside of the battery pack and the humidity in the battery pack can be maintained in a proper range. Meanwhile, a structure and a working principle for realizing internal air pressure balance and humidity control are disclosed. The specific technical scheme is as follows:
the invention provides a battery pack shell: the battery pack shell consists of a battery tray, an upper cover, a connecting piece, an explosion-proof vent valve and a sealing piece; the anti-explosion vent valve is characterized in that a sealing element is arranged on the mounting surface of the anti-explosion vent valve, the sealing element is mounted on the rear end plane of the battery tray and realizes the sealing of a matching interface, the upper cover is mounted on the battery tray through a connecting piece, the sealing of the matching interface is realized through the sealing element, and the inner cavity of the battery pack shell can only exchange gas with the outside through the anti-explosion vent valve.
Furthermore, the battery tray consists of a front frame, a rear frame, a left frame, a right frame, longitudinal beams, a plurality of cross beams, a bottom plate, an electrical panel and an isolation assembly; the connecting interface sealing is realized by the front frame, the rear frame, the left frame, the right frame, the longitudinal beam, the plurality of cross beams and the bottom plate, the longitudinal beam is arranged in the middle of an inner cavity formed by the four frames, the cross beams are arranged on two sides of the longitudinal beam, an upper cavity and a lower cavity are formed in the longitudinal beam, and holes are formed in the lapping sections of the front frame and the rear frame and the longitudinal beam to realize that the inner cavities of the front frame and the rear frame are communicated with the cavity in the longitudinal beam; the front frame is provided with a mounting hole for assembling an electric panel, the electric panel is mounted on the front end face of the front frame through a fastener to realize sealing of a matching interface, and the inner cavity of the front frame is communicated with the inner space of the battery tray through the mounting hole of the electric panel.
Furthermore, the barrier piece is composed of an isolation plate and a sealing ring, and the front-end space and the rear-end space inside the cavity of the longitudinal beam are isolated by the isolation assembly; the isolation component can move in the cavity inside the longitudinal beam under the driving of stress.
Furthermore, before the isolation assembly is installed, a proper amount of lubricant is coated on the periphery of the sealing ring, so that the sealing ring of the isolation assembly is matched with the inner surface of the longitudinal beam in a low-friction mode.
Furthermore, the isolation assembly is an isolation sleeve made of elastic materials or a folding telescopic bag made of high polymer materials, one end of the isolation assembly is connected with the longitudinal beam, and the front section space and the rear end space inside the cavity of the longitudinal beam are isolated.
Further, the isolation assembly and the longitudinal beam are connected and sealed through bonding, hot melting or crimping.
Further, the front frame, the rear frame, the left frame, the right frame and the longitudinal beam of the battery tray are made of aluminum alloy materials and are formed through an extrusion process to form the thin-wall section with the cavity inside.
Furthermore, the front frame, the rear frame, the left frame, the right frame, the longitudinal beams, the cross beams and the bottom plate structure realize the sealing of a connecting interface through welding, screwing, riveting or bonding.
The invention also provides a battery pack, which adopts the battery pack shell, and a battery module is arranged in the battery tray.
Further, the interstitial space in the battery pack is filled with argon, nitrogen or carbon dioxide gas.
The inner space of the battery pack is communicated with the front section cavity of the longitudinal beam separated by the isolation assembly through the inner cavity of the front frame to form an isobaric cavity, the inner cavity of the rear frame of the battery pack is communicated with the rear section cavity of the longitudinal beam separated by the isolation assembly to form an isobaric cavity, and the explosion-proof vent valve plays a role in gas exchange to enable the gas pressure of the inner cavity of the rear frame to be equal to the gas pressure outside the battery pack shell. The battery pack with the structure realizes the working principle of internal air pressure balance and humidity control; when the inside atmospheric pressure of battery package is greater than outside atmospheric pressure, the effort that the inside atmospheric pressure of battery package was applyed on isolation assembly can be greater than the effort that outside atmospheric pressure was applyed on isolation assembly, can promote isolation assembly and remove toward battery package rear in the longeron, thereby the inside gaseous volume of battery package increases pressure reduction, has some gas to discharge to the outside from explosion-proof ventilation valve in the frame behind the battery package, and isolation assembly can keep static to battery package inside and outside atmospheric pressure balanced state. When the internal air pressure of the battery pack is smaller than the external air pressure, the acting force of the external air pressure of the battery pack exerted on the isolation assembly can be larger than the acting force of the internal air pressure exerted on the isolation assembly, the isolation assembly can be pushed to move towards the front of the battery pack in the longitudinal beam, the volume of the internal air of the battery pack is reduced, the pressure is increased, part of the internal air can enter the rear frame of the battery pack from the outside through the explosion-proof ventilation valve, and the isolation assembly can keep static when the internal air pressure and the external air pressure of the battery pack are balanced. Thereby carry out the in-process that gaseous exchange realized inside and outside pressure balance at battery package casing and outside, the external gas only gets into the longeron back end cavity space divided by isolation component, and the external gas does not get into the battery package inner space of the longeron front end cavity space intercommunication divided by isolation component, so the humidity state of external gas can not influence the air humidity in the battery package to low cost, the mode of exempting from to maintain is with the inside atmospheric pressure of battery package and humidity control in appropriate within range.
The invention has the beneficial effects that: the cost is low: compared with the method that the humidity in the battery pack is controlled by the drying agent, the technical scheme of the invention is a maintenance-free design, and compared with the method that the drying agent is replaced periodically, the cost and the complex operation are reduced; the performance is stable: the invention avoids the external water vapor from entering the battery pack from the source, and has better reliability compared with the technical scheme of absorbing the water vapor entering the battery pack in a complex mode or pre-treating the air entering the battery pack so as to control the humidity.
Drawings
Fig. 1 is a schematic view of a battery pack according to embodiment 1 of the present application;
fig. 2 is a top view of a battery pack according to embodiment 1 of the present application;
fig. 3 is a left side view of the battery pack according to embodiment 1 of the present application;
FIG. 4 is a sectional view taken along the line A of FIG. 2
FIG. 5 is an enlarged view of a portion of FIG. 4 at D;
FIG. 6 is an enlarged view of a portion of FIG. 4 at E;
FIG. 7 is a sectional view taken along line B of FIG. 3;
FIG. 8 is a cross-sectional view taken along line C of FIG. 2;
FIG. 9 is an enlarged view of a portion of FIG. 8 at F;
fig. 10 is a schematic view of the internal gas expansion condition of the battery pack according to embodiment 1 of the present application;
fig. 11 is a schematic view of the internal gas contraction condition of the battery pack in embodiment 1 of the present application;
fig. 12 is a schematic view illustrating a rapid pressure relief working condition of a battery pack in embodiment 1 of the present application;
FIG. 13 is an enlarged view of a portion of FIG. 12 at G;
FIG. 14 is a schematic structural view of example 2 of the present application;
fig. 15 is a partial enlarged view of fig. 14 at H.
Reference numerals:
1-battery tray, 2-upper cover, 3-connecting piece, 4-explosion-proof vent valve, 5-sealing piece, 10-connecting piece, 11-electric panel, 12-right frame, 13-cross beam, 14-longitudinal beam, 15-left frame, 16-front frame, 17-rear frame, 18-isolation component, 19-bottom plate, 141-upper cavity, 142-lower cavity, 143-front space, 144-rear space 144, 161-inner cavity, 171-inner cavity, 181-isolation plate and 182-sealing ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Fig. 1, 2, 3, 4, 5, 6 and 7 show a battery pack case structure according to an embodiment of the present application; the battery pack shell consists of a battery tray 1, an upper cover 2, a connecting piece 3, an explosion-proof ventilation valve 4 and a sealing piece 5; the above battery can case is designed to be capable of gas exchange with the outside only through the explosion-proof vent valve 4. The explosion-proof vent valve 4 is designed to meet the waterproof and venting functions, and when the internal pressure of the battery pack shell exceeds a set value, the explosion-proof vent valve 4 can open a pressure relief channel. The battery tray 1 is composed of a front frame 16, a rear frame 17, a left frame 15, a right frame 12, longitudinal beams 14, a plurality of cross beams 13, a bottom plate structure 19, an electric panel 11, an isolation assembly 18 and a plurality of connecting pieces 10, and battery modules (not shown) can be installed in the battery tray 1. Considering that the battery tray 1 is advantageously manufactured in a mass-production and low-cost manner, the front frame 16, the rear frame 17, the left frame 15, the right frame 12, and the side members 14 are preferably formed of an aluminum alloy material by an extrusion process, so that the front frame 16, the rear frame 17, the left frame 15, the right frame 12, and the side members 14 are configured as thin-walled profiles having cavities inside.
As shown in fig. 8 and 9, 2 isolation assemblies 18 are respectively assembled in an upper cavity 141 and a lower cavity 142 inside the longitudinal beam 14; the isolation component 18 is composed of an isolation plate 181 and a sealing ring 182, and the isolation component 18 isolates a front space 143 and a rear space 144 in the cavity of the longitudinal beam 14; preferably, before the isolation assembly 18 is installed, a proper amount of lubricant is coated on the periphery of the sealing ring 182, so that the sealing ring 182 of the isolation assembly 18 is matched with the inner surface of the longitudinal beam 14 in a low-friction mode; the isolation assembly 18 is driven by a force to move within the cavity within the stringer 14.
The front frame 16, the rear frame 17, the left frame 15, the right frame 12, the longitudinal beam 14, the cross beam 13 and the bottom plate structure 19 are connected and sealed at a connecting interface through one or more of welding, screwing, riveting, bonding and the like or other prior art, the inner cavity 161 of the front frame 16 is communicated with the upper cavity 141 and the lower cavity 142 inside the longitudinal beam 14 by opening holes in the overlapping interface of the front frame 16 and the longitudinal beam 14, and the inner cavity 171 of the rear frame 17 is communicated with the upper cavity 141 and the lower cavity 142 inside the longitudinal beam 14 by opening holes in the overlapping interface of the rear frame 17 and the longitudinal beam 14. Since the isolation assembly 18 isolates the front space 143 from the rear space 144 within the cavity of the side rail 14, it will be appreciated that the interior cavity 161 of the front frame 16 is not in communication with the interior cavity 171 of the rear frame 17.
The mounting surface of the electrical panel 11 is provided with a sealing member (not shown), the front frame 16 is provided with a hole for mounting the electrical panel 11, the electrical panel 11 is mounted on the front end plane of the front frame 16 through a fastening member while realizing a mating interface seal, and the internal cavity 161 of the front frame 16 is communicated with the internal space of the battery tray 1 through an electrical panel mounting hole. The mounting surface of the explosion-proof ventilation valve 4 is provided with a sealing element (not shown), and the sealing element is mounted on the rear end plane of the rear frame 17 to realize the sealing of a matching interface. The upper cover 2 is arranged on the battery tray 1 through a connecting piece 3, and the matching interface sealing is realized through a sealing piece 5.
The inner space of the battery pack is communicated with the front section space 143 in the cavity of the longitudinal beam 14 partitioned by the isolation assembly 18 through the inner cavity 161 of the front frame 16 to form an equal pressure cavity, the inner cavity 171 of the rear frame 17 of the battery pack is communicated with the rear section space 144 in the cavity of the longitudinal beam 14 partitioned by the isolation assembly 18 to form an equal pressure cavity, and the explosion-proof vent valve 4 performs a gas exchange function to enable the static gas pressure of the inner cavity 171 of the rear frame 17 to be equal to the external gas pressure of the battery pack shell.
As shown in fig. 10, when the internal air pressure of the battery pack is greater than the external air pressure, the acting force exerted on the isolation assembly 18 by the internal air pressure of the battery pack is greater than the acting force exerted on the isolation assembly 18 by the external air pressure, and the resultant force F exerted on the front end of the isolation assembly 18 pushes the isolation assembly 18 to move in the cavity of the longitudinal beam 14 toward the rear of the battery pack; the volume of the front end space 143 in the cavity of the longitudinal beam 14 is increased, the volume of the rear end space 144 in the cavity of the longitudinal beam 14 is reduced, the front end space 143 in the cavity of the longitudinal beam 14 is communicated with the inside of the battery pack, the volume of gas in the battery pack is increased, the pressure is reduced, meanwhile, part of gas in the inner cavity 171 of the rear frame 17 of the battery pack is discharged to the outside from the explosion-proof vent valve 4, and the isolation assembly 18 is kept static in a state of balancing the internal pressure and the external pressure of the battery pack.
As shown in fig. 11, when the internal air pressure of the battery pack is less than the external air pressure, the acting force exerted on the isolation assembly 18 by the external air pressure of the battery pack is greater than the acting force exerted on the isolation assembly 18 by the internal air pressure, and the resultant force F exerted on the rear end of the isolation assembly 18 pushes the isolation assembly 18 to move forward in the cavity of the longitudinal beam 14; the volume of the front end space 143 in the cavity of the longitudinal beam 14 is reduced, the volume of the rear end space 144 in the cavity of the longitudinal beam 14 is increased, the front end space 143 in the cavity of the longitudinal beam 14 is communicated with the inside of the battery pack, the volume of the gas in the battery pack is reduced, the pressure is improved, meanwhile, the external gas enters the inner cavity 171 of the rear frame 17 of the battery pack through the explosion-proof breather valve 4, and the isolation assembly 18 keeps static when the internal pressure and the external pressure of the battery pack are balanced.
In the process of balancing the internal pressure and the external pressure by exchanging the air between the battery pack shell and the outside, the external air only enters the rear end space 144 in the cavity of the longitudinal beam 14 partitioned by the isolation assembly 18, and the external air does not enter the internal space of the battery pack communicated with the front end space 143 in the cavity of the longitudinal beam 14 partitioned by the isolation assembly 18, so that the humidity state of the external air does not affect the air humidity in the battery pack, and the internal air pressure and humidity of the battery pack are controlled in a proper range in a low-cost and maintenance-free manner.
Fig. 12 and 13 show an emergency exhaust state of the battery pack, and due to the fact that the air pressure in the battery pack rises sharply, the resultant force F applied to the front end of the isolation assembly 18 pushes the isolation assembly 18 to move towards the rear of the battery pack in the cavity of the longitudinal beam 14 until the isolation assembly 18 is pushed out of the longitudinal beam 14 to the inner cavity 171 of the rear frame 17 of the battery pack, so that the inner cavity 161 of the front frame 16 is communicated with the inner cavity 171 of the rear frame 17; the gas in the battery pack flows to the upper cavity 141 and the lower cavity 142 inside the longitudinal beam 14 through the inner cavity 161 of the front frame 16, then flows to the inner cavity 171 of the rear frame 17, and is discharged to the outside through the exhaust passage of the explosion-proof vent valve 4.
Example 2
Fig. 14 and 15 show another embodiment of the spacer assembly, and the other structure is the same as embodiment 1.
The isolation assembly 18 is preferably an isolation sleeve made of an elastic material or a folding flexible bag made of a high polymer material, one end of the isolation assembly 18 is connected with the longitudinal beam 14 and isolates a front space 143 and a rear space 144 inside a cavity of the longitudinal beam 14, and particularly, the isolation assembly 18 and the longitudinal beam 14 can be connected and sealed through bonding, hot melting, crimping and other processes. When the internal pressure of the battery pack is greater than the external pressure, the acting force exerted on the isolation assembly 18 by the internal pressure of the battery pack is greater than the acting force exerted on the isolation assembly 18 by the external pressure, and the resultant force exerted on the inside of the isolation assembly 18 pushes the isolation assembly 18 to expand; the volume of the front end space 143 in the cavity of the longitudinal beam 14 is increased, the volume of the rear end space 144 in the cavity of the longitudinal beam 14 is reduced, the front end space 143 in the cavity of the longitudinal beam 14 is communicated with the inside of the battery pack, the volume of gas in the battery pack is increased, the pressure is reduced, meanwhile, part of gas in the inner cavity 171 of the rear frame 17 of the battery pack is discharged to the outside from the explosion-proof vent valve 4, and the isolation assembly 18 is kept static in a state of balancing the internal pressure and the external pressure of the battery pack. When the internal air pressure of the battery pack is lower than the external air pressure, the acting force exerted on the isolation assembly 18 by the external air pressure of the battery pack is larger than the acting force exerted on the isolation assembly 18 by the internal air pressure, and the resultant force exerted on the outside of the isolation assembly 18 pushes the isolation assembly 18 to contract; the volume of the front end space 143 in the cavity of the longitudinal beam 14 is reduced, the volume of the rear end space 144 in the cavity of the longitudinal beam 14 is increased, the front end space 143 in the cavity of the longitudinal beam 14 is communicated with the inside of the battery pack, the volume of the gas in the battery pack is reduced, so that the pressure is improved, meanwhile, the external gas enters the inner cavity 171 of the rear frame 17 of the battery pack through the explosion-proof ventilation valve 4, and the isolation assembly 18 keeps static when the internal pressure and the external pressure of the battery pack are balanced.
Example 3
There is provided a battery pack including a battery module and the battery pack case according to the above aspect, preferably, the gap space in the battery pack is filled with argon gas, nitrogen gas or carbon dioxide gas. Understandably, the external air exhausted or sucked from the battery pack through the explosion-proof vent valve 4 automatically balances the internal and external pressure difference, and the external air does not enter the area for accommodating the battery module in the process; consequently, the humidity of outside air can not influence the inside gaseous humidity of filling of battery package, and the dry gas of battery package inside can not take place the condensation to corrosion, the short circuit risk that the comdenstion water caused have been reduced.
Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.
Claims (8)
1. Battery package casing, its characterized in that: the battery pack shell consists of a battery tray (1), an upper cover (2), a connecting piece (3), an explosion-proof ventilation valve (4) and a sealing piece (5); the mounting surface of the explosion-proof vent valve (4) is provided with a sealing element which is mounted on the rear end plane of the battery tray (1) and realizes the sealing of a matching interface, the upper cover (2) is mounted on the battery tray (1) through a connecting element (3), the sealing of the matching interface is realized through the sealing element (5), and the inner cavity of the battery pack shell can only exchange gas with the outside through the explosion-proof vent valve (4);
the battery tray (1) is composed of a front frame (16), a rear frame (17), a left frame (15), a right frame (12), longitudinal beams (14), a plurality of cross beams (13), a bottom plate (19), an electric panel (11) and an isolation assembly (18); the connecting interface sealing is realized by the front frame (16), the rear frame (17), the left frame (15), the right frame (12), the longitudinal beams (14), the cross beams (13) and the bottom plate (19), the longitudinal beams (14) are arranged in the middle of an inner cavity formed by the four frames, the cross beams (13) are arranged on two sides of the longitudinal beams (14), an upper cavity (141) and a lower cavity (142) are formed in the longitudinal beams (14), and holes are formed in the overlapping sections of the front frame (16) and the rear frame (17) and the longitudinal beams (14) to realize that the inner cavities of the front frame (16) and the rear frame (17) are communicated with the cavity in the longitudinal beams (14); the front frame (16) is provided with mounting holes for assembling the electric panel (11), the electric panel (11) is mounted on the front end face of the front frame (16) through fasteners to realize matching interface sealing, and the internal cavity of the front frame (16) is communicated with the internal space of the battery tray (1) through the mounting holes of the electric panel (11);
the isolation assembly (18) is composed of an isolation plate (181) and a sealing ring (182), and the isolation assembly (18) isolates a front space (143) and a rear space (144) in the cavity of the longitudinal beam (14); the isolation component (18) can move in the inner cavity of the longitudinal beam (14) under the driving of stress; the isolation component (18) is an isolation sleeve made of elastic materials or a folding telescopic bag made of high polymer materials.
2. The battery pack housing of claim 1, wherein: before the isolation assembly (18) is installed, a proper amount of lubricant is coated on the periphery of the sealing ring (182), so that the sealing ring (182) of the isolation assembly (18) is matched with the inner surface of the longitudinal beam (14) in a low-friction mode.
3. The battery pack housing of claim 2, wherein: one end of the isolation component (18) is connected with the longitudinal beam (14) and realizes the isolation of the front space (143) and the rear space (144) inside the cavity of the longitudinal beam (14).
4. The battery pack housing of claim 2, wherein: the isolation assembly (18) is connected and sealed with the longitudinal beam (14) through bonding, hot melting or crimping.
5. The battery pack housing according to any one of claims 2-4, wherein: the front frame (16), the rear frame (17), the left frame (15), the right frame (12) and the longitudinal beam (14) of the battery tray (1) are made of aluminum alloy materials and are formed through an extrusion process to form a thin-wall section with a cavity inside.
6. The battery pack housing according to any one of claims 2-4, wherein: the front frame (16), the rear frame (17), the left frame (15), the right frame (12), the longitudinal beam (14), the cross beam (13) and the bottom plate (19) are welded, screwed, riveted or bonded to realize sealing of connecting interfaces.
7. A battery pack, comprising: use of a battery pack housing according to any of claims 1-6, with a battery module mounted in the battery tray (1).
8. The battery pack according to claim 7, wherein: the interstitial space in the battery pack is filled with argon, nitrogen or carbon dioxide gas.
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| CN202110443615.1A CN113140861B (en) | 2021-04-23 | 2021-04-23 | Battery case and battery pack |
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| CN202110443615.1A CN113140861B (en) | 2021-04-23 | 2021-04-23 | Battery case and battery pack |
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| CN113140861B true CN113140861B (en) | 2022-06-24 |
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| CN211629253U (en) * | 2020-01-14 | 2020-10-02 | 苟绍玲 | Explosion-proof new forms of energy battery box |
| CN111584786A (en) * | 2020-05-14 | 2020-08-25 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Power battery module |
| CN212412144U (en) * | 2020-09-04 | 2021-01-26 | 江铃汽车股份有限公司 | Battery pack box cover and power battery pack assembly |
| CN212587624U (en) * | 2020-09-04 | 2021-02-23 | 江铃汽车股份有限公司 | Power battery pack |
| CN112670679A (en) * | 2020-12-21 | 2021-04-16 | 湖南久森新能源有限公司 | Flame-retardant and explosion-proof shell for lithium ion battery |
| CN214754017U (en) * | 2021-04-23 | 2021-11-16 | 江铃汽车股份有限公司 | Battery pack shell and battery pack |
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| CN113140861A (en) | 2021-07-20 |
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