Electric vehicle battery pack capable of being quickly charged

Abstract

The utility model discloses an electromobile battery pack capable of fast charging, which comprises a box body, a PTC (Positive Temperature Coefficient) element, a module and a box cover which are sequentially distributed from bottom to top, the box body and the box cover are hermetically and fixedly connected, a sealed cavity is formed between the box body and the box cover, and the module, a fast charging plug-in, a BMS (Battery Management System) module, the PTC element and a BDU (Battery Device Unit) module are all positioned in the cavity. The box body or the box cover is provided with a fast-charging plug-in through hole matched with the fast-charging plug-in, the fast-charging plug-in is electrically connected with the module through the BDU module, the module comprises a plurality of batteries, and the device is reasonable in design, simple in structure, light in weight, high in energy density, good in structural strength, high in safety performance, fast to operate and low in production cost, and the space of the battery box body is utilized to the maximum extent.

Description

Technical Field

[0001] The utility model relates to a fast-chargeable electric vehicle battery pack, belonging to the technical field of pure electric vehicles. Background Art

[0002] The new energy vehicle industry is developing rapidly, and more and more people are starting to use electric vehicles, especially in cargo transportation and commuting. Pure electric vehicles have great development and economic benefits. As the core component of new energy vehicles, battery packs have higher and higher requirements for safety performance and economy. Conventional battery packs charge slowly and need to be improved. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a fast-chargeable electric vehicle battery pack. The utility model comprises a box body, a PTC element, a module and a box cover, which are arranged from bottom to top in sequence. The box body and the box cover are sealed and fixedly connected. A sealed chamber is formed between the box body and the box cover. The module, the fast-charging plug-in, the BMS module, the PTC element and the BDU module are all located in the chamber. A fast-charging plug-in through hole matching the fast-charging plug-in is provided on the box body or the box cover. The fast-charging plug-in is electrically connected to the module through the BDU module. The module comprises several batteries. The device has a reasonable design, a simple structure, a light weight, and maximizes the use of the space of the battery box. It also has high energy density, good structural strength, high safety performance, quick operation and low production cost.

[0004] In the first aspect, the utility model provides a fast-chargeable electric vehicle battery pack, including a case, a module, a fast-charging plug-in, a case cover, a BMS module, a PTC element and a BDU module. The case, the PTC element, the module and the case cover are distributed from bottom to top in sequence, the case and the case cover are sealed and fixedly connected, a sealed chamber is formed between the case and the case cover, the module, the fast-charging plug-in, the BMS module, the PTC element and the BDU module are all located in the chamber, a fast-charging plug-in through hole matching the fast-charging plug-in is provided on the case or the case cover, the fast-charging plug-in is electrically connected to the module through the BDU module, and the module includes a plurality of batteries.

[0005] Preferably, the fast charging plug-in includes a fast charging high-pressure plug-in and a fast charging low-pressure plug-in, which are fixedly arranged in the chamber, and a fast charging high-pressure plug-in through hole matching the fast charging high-pressure plug-in is opened on the box body or the box cover, and a fast charging low-pressure plug-in through hole matching the fast charging low-pressure plug-in is opened on the box body or the box cover.

[0006] Preferably, the module includes a plurality of second-layer boards and a plurality of module mounting beams, batteries are fixedly arranged between the plurality of module mounting beams, the plurality of second-layer boards are fixedly connected to the plurality of module mounting beams, and the BMS module and the BDU module are fixedly mounted on the module mounting beams.

[0007] Preferably, it comprises a copper bar which is fixedly arranged on a plurality of module mounting beams and electrically connects the modules.

[0008] Preferably, a sealing ring is included, and the sealing ring is fixedly arranged between the box body and the box cover.

[0009] Preferably, a waterproof and breathable valve is included, and the waterproof and breathable valve is fixedly arranged at the front end of the box body or the box cover.

[0010] Preferably, it comprises a plurality of tie rods, one end of each of the tie rods is fixedly connected to a plurality of module mounting beams or a plurality of second-layer plates, and the other end of each of the tie rods is fixedly connected to a box body or a box cover.

[0011] Preferably, it comprises a plurality of aluminum plates and a foam layer, and the plurality of aluminum plates are fixedly arranged on the box body through the foam layer.

[0012] Beneficial effects achieved by the utility model:

[0013] The utility model includes a box body, a PTC element, a module and a box cover which are distributed from bottom to top in sequence. The box body and the box cover are sealed and fixedly connected. A sealed chamber is formed between the box body and the box cover. The module, fast charging plug-in, BMS module, PTC element and BDU module are all located in the chamber. A fast charging plug-in through hole matching the fast charging plug-in is provided on the box body or the box cover. The fast charging plug-in is electrically connected to the module through the BDU module. The module includes a plurality of batteries. The device has a reasonable design, a simple structure, and a light weight. It maximizes the use of the space of the battery box body, and has high energy density, good structural strength, high safety performance, quick operation, and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 is a structural diagram of some embodiments of the present application;

[0016] The meaning of the reference numerals are: 1-box body, 2-sealing ring, 3-second layer board, 4-module, 5-fast charging high-pressure plug-in, 6-box cover, 7-copper busbar, 8-fast charging low-pressure plug-in, 9-BMS module, 10-waterproof breathable valve, 11-module mounting beam, 12-PTC element, 13-BDU module, 14-pull rod, 15-aluminum plate. DETAILED DESCRIPTION

[0017] To facilitate the technical solution of the application, some concepts involved in the application are first explained below.

[0018] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, they are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, if the descriptions of "first" and "second" etc. are involved in the present utility model, they are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0020] See also Figure 1 The present application discloses a fast-chargeable electric vehicle battery pack, including a box body 1, a module 4, a fast-charge plug-in, a box cover 6, a BMS module 9, a PTC element 12 and a BDU module 13. The box body 1, the PTC element 12, the module 4 and the box cover 6 are distributed from bottom to top in sequence. The box body 1 and the box cover 6 are sealed and fixedly connected. A sealed chamber is formed between the box body 1 and the box cover 6. The module 4, the fast-charge plug-in through hole matching the fast-charge plug-in is provided on the box body 1 or the box cover 6. The fast-charge plug-in is electrically connected to the module 4 through the BDU module 13. The module 4 includes a number of batteries. The box body and the box cover are connected by fixing bolts, and the installation is firm and stable. The box body is formed by welding rolled steel and a bottom plate, and has high structural strength and light weight. The BMS mounting bracket is connected to the box body, and its replaceability is strong, so that different BMS modules can be installed. The box cover is made of rolled steel, which has good strength, light weight, low cost and high production efficiency. The BDU module is placed on the front side of the module, which greatly reduces the use of copper bars, maximizes the use of the horizontal space of the battery pack, and reduces development costs. The BMS mounting bracket is a molded part of the Guoxuan microvan platform, which is highly replaceable and can realize the installation of different BMS modules. The PTC element is pasted on the bottom of the box to ensure the performance of the battery.

[0021] In an embodiment of the present application, the fast charging plug-in includes a fast charging high-voltage plug-in 5 and a fast charging low-voltage plug-in 8, which are fixedly arranged in the chamber, and a fast charging high-voltage plug-in through hole matching the fast charging high-voltage plug-in 5 is opened on the box body 1 or the box cover 6, and a fast charging low-voltage plug-in through hole matching the fast charging low-voltage plug-in 8 is opened on the box body 1 or the box cover 6.

[0022] In the embodiment of the present application, the module 4 includes a plurality of second-layer boards 3 and a plurality of module mounting beams 11, batteries are fixedly arranged between the plurality of module mounting beams 11, a plurality of second-layer boards 3 are fixedly connected to the plurality of module mounting beams 11, and the BMS module 9 and the BDU module 13 are fixedly mounted on the module mounting beams 11. The second-layer board 3 may be a rectangular rod, and the plurality of module mounting beams 11 may be a flat plate. The battery is fixed on the module mounting beam and the second-layer board, which maximizes the use of the space of the battery pack. The module is fixed on an aluminum plate to play a buffering and pressure-reducing role, and a foam layer is attached to the lower part of the aluminum plate. The module includes a rear-end module and a front-end module. The rear-end module is connected to the front-end module through a low-voltage plug-in, which can maximize the use of the lateral space of the battery pack, reduce the use of the acquisition harness, and reduce the development cost.

[0023] In the embodiment of the present application, a copper busbar 7 is included. The copper busbar 7 is fixedly arranged on a plurality of module mounting beams 11 , and the copper busbar 7 is electrically connected to the module 4 .

[0024] In the embodiment of the present application, a sealing ring 2 is included, and the sealing ring 2 is fixedly arranged between the box body 1 and the box cover 6. The sealing ring is pasted between the box body and the box cover, so that the box body and the box cover have good sealing performance.

[0025] In the embodiment of the present application, a waterproof breathable valve 10 is included, and the waterproof breathable valve 10 is fixedly arranged at the front end of the box body 1 or the box cover 6. The waterproof breathable valve is at the front end of the battery pack, and its safety is high.

[0026] In the embodiment of the present application, a plurality of tie rods 14 are included, one end of the plurality of tie rods 14 is fixedly connected to a plurality of module mounting beams 11 or a plurality of second-layer plates 3 , and the other end of the plurality of tie rods 14 is fixedly connected to the box body 1 or the box cover 6 .

[0027] In the embodiment of the present application, several aluminum plates 15 and foam layers are included, and the aluminum plates 15 are fixedly arranged on the box body 1 through the foam layer. The aluminum plate 15 can be a flat plate, and the foam layer is made of foam. The module is fixed on the aluminum plate to play a buffering and pressure reduction role. A certain amount of foam is attached to the lower part of the aluminum plate to maximize the safety of the battery pack.

[0028] The box body 1 is a box-type structure with an upper groove on the upper surface, and the box cover 6 is a box-type structure with a lower groove on the lower surface. There are many models of sealing ring 2, fast charging high-pressure plug-in 5, copper bus 7, fast charging low-pressure plug-in 8, fast charging plug-in, BMS module 9, waterproof breathable valve 10, pull rod 14, PTC element 12 and BDU module 13 that can be used in the prior art. Technical personnel in this field can choose according to actual needs, and no examples are given in this embodiment.

[0029] PTC is the abbreviation of Positive Temperature Coefficient, which means positive temperature coefficient. It generally refers to semiconductor materials or components with a large positive temperature coefficient. BMS battery system is commonly known as battery nanny or battery butler. It is mainly for intelligent management and maintenance of each battery unit, monitoring the status of the battery, preventing the battery from overcharging and over-discharging, so as to extend the service life of the battery. BDU stands for Battery energy Distribution Unit, which refers to the battery energy distribution unit, which is an important component of the high-voltage circuit of electric vehicles. BDU, also known as Battery Disconnect Unit, is an important accessory in the high-voltage circuit of new energy vehicles. It controls the power-on and power-off process, pre-charging process, and charging process of the high-voltage electrical circuit. Whether the characteristic parameters of the BDU product meet the qualified conditions has an important impact on the service life, control strategy and high-voltage electrical safety of the entire vehicle.

[0030] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0031] Those skilled in the art will readily come up with other embodiments of the present invention after considering the specification and practicing the utility model herein. This application is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art that are not invented by the present invention. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0032] The above specific implementation methods further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above are only specific implementation methods of the present application and are not used to limit the protection scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the present application should be included in the protection scope of the present application.

Claims

1. A fast-chargeable electric vehicle battery pack, characterized in that: The invention comprises a box body (1), a module (4), a fast charging plug-in, a box cover (6), a BMS module (9), a PTC element (12) and a BDU module (13); the box body (1), the PTC element (12), the module (4) and the box cover (6) are arranged in sequence from bottom to top; the box body (1) and the box cover (6) are sealed and fixedly connected; a sealed chamber is formed between the box body (1) and the box cover (6); the module (4), the fast charging plug-in, the BMS module (9), the PTC element (12) and the BDU module (13) are all located in the chamber; a fast charging plug-in through hole matching the fast charging plug-in is provided on the box body (1) or the box cover (6); the fast charging plug-in is electrically connected to the module (4) through the BDU module (13); and the module (4) comprises a plurality of batteries.

2. A fast-chargeable electric vehicle battery pack according to claim 1, characterized in that: The fast-charging plug-in comprises a fast-charging high-voltage plug-in (5) and a fast-charging low-voltage plug-in (8), wherein the fast-charging high-voltage plug-in (5) and the fast-charging low-voltage plug-in (8) are fixedly arranged in a chamber, and a fast-charging high-voltage plug-in through hole matching the fast-charging high-voltage plug-in (5) is provided on the box body (1) or the box cover (6), and a fast-charging low-voltage plug-in through hole matching the fast-charging low-voltage plug-in (8) is provided on the box body (1) or the box cover (6).

3. The fast-chargeable electric vehicle battery pack according to claim 1, characterized in that: The module (4) package comprises a plurality of second-layer boards (3) and a plurality of module mounting beams (11), batteries are fixedly arranged between the plurality of module mounting beams (11), the plurality of second-layer boards (3) are fixedly connected to the plurality of module mounting beams (11), and the BMS module (9) and the BDU module (13) are fixedly mounted on the module mounting beams (11).

4. A fast-chargeable electric vehicle battery pack according to claim 3, characterized in that: It comprises a copper busbar (7), which is fixedly arranged on a plurality of module mounting beams (11), and the copper busbar (7) is electrically connected to the module (4).

5. The fast-chargeable electric vehicle battery pack according to claim 1, characterized in that: It comprises a sealing ring (2), wherein the sealing ring (2) is fixedly arranged between the box body (1) and the box cover (6).

6. The fast-chargeable electric vehicle battery pack according to claim 1, characterized in that: It comprises a waterproof breathable valve (10), which is fixedly arranged at the front end of the box body (1) or the box cover (6).

7. The fast-chargeable electric vehicle battery pack according to claim 3, characterized in that: It comprises a plurality of tie rods (14), one end of the plurality of tie rods (14) is fixedly connected to a plurality of module mounting beams (11) or a plurality of second-layer plates (3), and the other end of the plurality of tie rods (14) is fixedly connected to a box body (1) or a box cover (6).

8. The fast-chargeable electric vehicle battery pack according to claim 1, characterized in that: It comprises a plurality of aluminum plates (15) and a foam layer, wherein the plurality of aluminum plates (15) are fixedly arranged on the box body (1) via the foam layer.

Images