Soft package lithium battery pack of electric vehicle

Abstract

The utility model discloses an electric vehicle soft package lithium battery pack, which comprises a shell and a core body, the core body is arranged in the shell, the core body comprises a plurality of soft package batteries and an isolation plate, the plurality of soft package batteries are collinearly arranged, the two ends of each soft package battery are connected with tabs, the surface of the isolation plate is uniformly provided with isolation grooves, and the isolation grooves are communicated with the shell. The isolation plates are arranged at tabs at the two ends of the soft package batteries, the tabs at the ends of the soft package batteries penetrate through isolation grooves in the surfaces of the isolation plates, the ends of the tabs at the ends of the upper and lower adjacent soft package batteries are connected end to end in a welding mode, and the outer sides of the soft package batteries and the isolation plates are covered with flame-retardant laminates. A power supply protection mainboard is fixed on the outer side of the flame-retardant laminate at one end of the soft package battery at the end part, and the power supply protection mainboard is electrically connected with the soft package battery; the shell comprises a battery cylinder, one end of the battery cylinder is provided with a battery upper cover, and the other end of the battery cylinder is provided with a battery lower cover.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a soft-pack lithium battery pack for electric vehicles. Background Art

[0002] With the development of the economy and technology, the country has also put forward higher requirements for environmental protection. Lithium batteries, as an emerging clean energy source, are gradually being recognized by the market. Currently, the internal wiring layout of existing lithium battery pack designs is particularly complicated, which not only increases the complexity of operation and maintenance, but also poses significant safety risks. Under the same specifications, smaller lithium battery packs have poor heat dissipation and overly dense components due to the compact internal space design, which significantly increases safety risks. For larger lithium battery packs, although their spatial layout is more flexible, it reduces the risk of overheating and short circuits to a certain extent, providing relatively high safety. However, this design also means that they cannot fully meet the diverse needs of the current market in terms of portability and cost-effectiveness. Therefore, how to balance market demand and portability while ensuring safety is a major challenge that needs to be solved in current lithium battery pack design. Therefore, the utility model proposes a soft-pack lithium battery pack for electric vehicles, which realizes a small size, high capacity and safe lithium battery pack.

[0003] Currently, no effective solutions have been proposed for the problems in related technologies. Utility Model Content

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a soft-pack lithium battery pack for electric vehicles, comprising an outer shell and a core, the core being installed inside the outer shell, the core comprising a plurality of soft-pack batteries and an isolation plate, the plurality of soft-pack batteries being collinearly arranged, both ends of the soft-pack batteries being connected with tabs, the surface of the isolation plate being evenly provided with isolation grooves, the isolation plate being arranged at the tabs at both ends of the soft-pack batteries, the tabs at the ends of the soft-pack batteries passing through the isolation grooves on the surface of the isolation plate, and the tab ends of the upper and lower adjacent soft-pack batteries being connected end to end by welding, the outer sides of the soft-pack batteries and the isolation plate being covered with a flame-retardant layer plate, the outer side of the flame-retardant layer plate at one end of the soft-pack batteries being fixed with a power protection mainboard, the power protection mainboard being electrically connected to the soft-pack batteries;

[0005] The shell includes a battery canister, a battery upper cover is installed at one end of the battery canister, and a battery lower cover is installed at the other end of the battery canister. The battery upper cover is respectively installed with a charging plug and a discharging plug, and the charging plug and the discharging plug are respectively electrically connected to the soft-pack battery.

[0006] As a preferred technical solution of the present invention, the number of the soft-pack batteries is consistent with the number of the isolation grooves on the surface of the isolation plate.

[0007] As a preferred technical solution of the present invention, the isolation plate and the flame-retardant layer are both made of flame-retardant resin plate, and the battery tube is made of aluminum alloy.

[0008] As a preferred technical solution of the present invention, the battery upper cover and the battery lower cover are respectively fastened to the ends of the battery tube by screws.

[0009] As a preferred technical solution of the present invention, a safety lock is installed between the battery cover and the battery can.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] This utility model adopts a design of soft-pack batteries and tabs connecting electrodes, which significantly improves the capacity and portability of the battery. With its large capacity and compact size, the soft-pack battery effectively reduces the overall size of the battery pack, allowing for more room for spatial layout. To further improve safety, the exterior of the battery pack is covered with a flame-retardant laminate to form a sturdy shell, while the interior is treated with glue to effectively enhance heat dissipation. In addition, one end of the battery pack is equipped with a power protection motherboard, which automatically activates the protection mechanism in the event of abnormal charging and discharging, quickly disconnecting the circuit, thereby ensuring the safe and stable operation of the battery pack and effectively reducing the risk of overheating and short circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is an exploded view of the utility model;

[0015] Figure 3 This is a front view of the soft pack battery and the separator in the utility model;

[0016] In the figure: 1. Soft-pack battery; 2. Isolation plate; 3. Tab; 4. Isolation groove; 5. Flame-retardant layer; 6. Power protection main board; 7. Battery upper cover; 8. Battery lower cover; 9. Charging plug; 10. Discharging plug; 11. Safety lock; 12. Battery canister. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example

[0019] See also Figure 1-3 The utility model provides the following technical solutions: A soft-pack lithium battery pack for electric vehicles, comprising an outer shell and a core, wherein the core is installed inside the outer shell, and the core comprises a plurality of soft-pack batteries 1 and an isolation plate 2, wherein these soft-pack batteries 1 are arranged in a collinear manner, and each soft-pack battery 1 is equipped with a pole ear 3 at both ends. Isolation grooves 4 are evenly distributed on the surface of the isolation plate 2, and the number matches the soft-pack batteries 1. The isolation plate 2 is cleverly arranged at the pole ears 3 at both ends of the soft-pack battery 1 to ensure that the pole ears 3 at the ends of the soft-pack battery 1 can accurately pass through the isolation grooves 4 on the surface of the isolation plate 2, thereby ensuring that the soft-pack battery 1 is fixed. In addition, the pole ears 3 at the ends of the upper and lower adjacent soft-pack batteries 1 are connected end to end by welding, thereby ensuring the stable transmission of current. In order to enhance the safety performance of the battery pack, the outer sides of the soft-pack battery 1 and the isolation plate 2 are covered with a flame-retardant layer 5. A power protection motherboard 6 is fixed to the outside of the flame-retardant layer 5 at the end of the battery pack. This motherboard 6 is electrically connected to the soft-pack battery 1, providing effective power protection for the battery pack. In the event of abnormal charging or discharging, it can automatically protect itself and disconnect the circuit, making the battery pack safer. The outer shell consists of a battery can 12, a battery cover 7, and a battery cover 8, forming a closed and stable structure. The battery cover 7 is equipped with a charging plug 9 and a discharging plug 10, respectively, which electrically connect to the soft-pack battery 1, facilitating charging and discharging operations of the battery pack.

[0020] In order to protect materials and structures from damage by fire, in this embodiment, as a preferred technical solution of the present invention, the isolation plate 2 and the flame-retardant layer plate 5 are both made of flame-retardant resin plate, and the battery can 12 is made of aluminum alloy.

[0021] In order to facilitate the disassembly and assembly of the battery housing, in this embodiment, as a preferred technical solution of the present invention, the battery upper cover 7 and the battery lower cover 8 are respectively fastened to the ends of the battery tube 12 by screws.

[0022] In order to make the battery pack safer, in this embodiment, as a preferred technical solution of the present invention, a safety lock 11 is installed between the battery cover 7 and the battery can 12.

[0023] In summary, with the help of the above technical solution of the present invention, the present invention bends the pole ear 3 of the soft-pack battery 1 at the bending machine according to the set size, and then inserts it into the flame-retardant resin isolation plate 2 in sequence, wherein the flame-retardant resin isolation plate 2 mainly fixes the interval of the soft-pack battery 1 and prevents the pole ear 3 on the soft-pack battery 1 from hitting the soft-pack battery 1 body during welding, preventing the risk of short circuit. After determining the position, the flame-retardant resin isolation plate 2 is wrapped around the soft-pack battery 1 group to play a supporting role, and then the assembled soft-pack battery 1 group is sent to the laser welding place for welding the pole ear. After the welding is completed, the power protection mainboard 6 is fixed to one end of the soft-pack battery 1 group. The cable is connected to the corresponding tab 3 of the soft-pack battery 1, and the power protection mainboard 6 can protect itself and disconnect the circuit when the soft-pack battery 1 is abnormally charged or discharged, making the battery pack safer. After completion, glue filling is carried out, and the glue filling can increase the heat dissipation, thereby further ensuring the safety of the battery. After the glue dries, it is waterproofed, and the battery barrel 12 and the battery lower cover 8 are fixed with screws. Then, the soft-pack battery 1 is assembled into the battery barrel 12, and the battery upper cover 7, discharge plug 10, charging plug 9 and safety lock 11 are assembled and fastened with screws. The charging plug 9 adopts the new national standard fast charging port, which can be charged quickly and greatly shorten the charging time.

[0024] Finally, it should be noted that in the present invention, unless otherwise clearly stipulated and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0025] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A soft-pack lithium battery pack for an electric vehicle, comprising a housing and a core, wherein the core is mounted inside the housing, and characterized in that: The core comprises a plurality of soft-pack batteries (1) and an isolation plate (2), wherein the plurality of soft-pack batteries (1) are collinearly arranged, both ends of the soft-pack batteries (1) are connected with pole ears (3), the surface of the isolation plate (2) is evenly provided with isolation grooves (4), the isolation plate (2) is arranged at the pole ears (3) at both ends of the soft-pack batteries (1), the pole ears (3) at the ends of the soft-pack batteries (1) pass through the isolation grooves (4) on the surface of the isolation plate (2), and the pole ears (3) at the ends of the upper and lower adjacent soft-pack batteries (1) are connected end to end by welding, the outer sides of the soft-pack batteries (1) and the isolation plate (2) are covered with a flame-retardant layer (5), the outer side of the flame-retardant layer (5) at one end of the soft-pack batteries (1) is fixed with a power protection mainboard (6), and the power protection mainboard (6) and the soft-pack batteries (1) are electrically connected; The housing comprises a battery canister (12), one end of the battery canister (12) is mounted with a battery upper cover (7), the other end of the battery canister (12) is mounted with a battery lower cover (8), the battery upper cover (7) is mounted with a charging plug (9) and a discharging plug (10), and the charging plug (9) and the discharging plug (10) are electrically connected to the soft-pack battery (1) respectively.

2. The electric vehicle soft-pack lithium battery pack according to claim 1, characterized in that: The number of the soft-pack batteries (1) is consistent with the number of the isolation grooves (4) on the surface of the isolation plate (2).

3. The electric vehicle soft-pack lithium battery pack according to claim 1, characterized in that: The isolation plate (2) and the flame-retardant layer plate (5) are both made of flame-retardant resin plates, and the battery cylinder (12) is made of aluminum alloy.

4. The electric vehicle soft-pack lithium battery pack according to claim 1, characterized in that: The battery upper cover (7) and the battery lower cover (8) are respectively fastened to the ends of the battery barrel (12) by screws.

5. The electric vehicle soft-pack lithium battery pack according to claim 1, characterized in that: A safety lock (11) is installed between the battery upper cover (7) and the battery barrel (12).

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