阅读说明：本技术 一种新型高能量密度长寿命动力电池系统 (Novel high energy density long-life power battery system ) 是由 陈哲敏 于 2019-10-30 设计创作，主要内容包括：本发明提供了一种新型高能量密度长寿命动力电池系统,属于锂离子电池技术领域。本系统包括机箱本体、内置于机箱本体的固定支架、多组锂离子电池组、高压电源；锂离子电池组与高压电源连接且均固定于固定支架上；还包括内置于机箱本体的电池管理系统、高压控制系统；电池管理系统、高压控制系统均固定于固定支架上；电池管理系统与锂离子电池组连接；高压控制系统与锂离子电池组连接；锂离子电池组的外侧设有电芯支架；锂离子电池组的上端两侧均设有软连接件；电芯支架、软连接件均内置于机箱本体且固定于固定支架上。本系统克服了传统动力电池系统的低寿命、质量重、体积大、污染严重等问题,从技术上实现高能量密度、长寿命。(The invention provides a novel power battery system with high energy density and long service life, and belongs to the technical field of lithium ion batteries. The system comprises a case body, a fixed support arranged in the case body, a plurality of groups of lithium ion battery packs and a high-voltage power supply; the lithium ion battery pack is connected with the high-voltage power supply and is fixed on the fixed bracket; the battery management system and the high-voltage control system are arranged in the case body; the battery management system and the high-voltage control system are fixed on the fixed bracket; the battery management system is connected with the lithium ion battery pack; the high-voltage control system is connected with the lithium ion battery pack; a cell bracket is arranged on the outer side of the lithium ion battery pack; soft connecting pieces are arranged on two sides of the upper end of the lithium ion battery pack; the battery cell support and the soft connecting piece are arranged in the case body and fixed on the fixed support. The system overcomes the problems of low service life, heavy mass, large volume, serious pollution and the like of the traditional power battery system, and technically realizes high energy density and long service life.)

1. A novel power battery system with high energy density and long service life comprises a case body (6), a fixed support (61) arranged in the case body (6), a plurality of groups of lithium ion battery packs (1) and a high-voltage power supply; the lithium ion battery pack (1) is connected with a high-voltage power supply and is fixed on the fixing support (61); the method is characterized in that: the battery management system (2) and the high-voltage control system (5) are arranged in the case body (6); the battery management system (2) and the high-voltage control system (5) are fixed on the fixed support (61); the battery management system (2) is connected with the lithium ion battery pack (1) and is used for monitoring and managing the lithium ion battery pack (1); the high-voltage control system (5) is connected with the lithium ion battery pack (1) and is used for controlling a high-voltage power supply of the lithium ion battery pack (1); a battery cell bracket (3) is arranged on the outer side of the lithium ion battery pack (1); the battery cell bracket (3) is used for fixing a battery chip in the lithium ion battery pack (1); both sides of the upper end of the lithium ion battery pack (1) are provided with soft connecting pieces (4); the soft connecting piece (4) is used for electrically connecting a plurality of groups of lithium ion battery packs (1); the battery cell support (3) and the flexible connecting piece (4) are both arranged in the case body (6) and fixed on the fixing support (61).

2. The novel high energy density long life power battery system of claim 1, wherein: the multiple groups of lithium ion battery packs (1) adopt multiple groups of lithium ion battery standard modules which are connected in series.

3. The novel high energy density long life power battery system of claim 2, wherein: the standard lithium ion battery module is formed by connecting 20 lithium ion battery chips in series and in parallel; the lithium ion battery chip adopts a 36Ah ternary lithium battery.

4. The novel high energy density long life power battery system of claim 2, wherein: an aluminum sheet is arranged on the outer side of a battery chip in the lithium ion battery pack (1) for heat dissipation.

5. The novel high energy density long life power battery system of claim 1, wherein: the flexible connecting piece (4) adopts automobile-level components and connecting elements, and the redundancy of electrical parameter indexes is more than 150%.

6. The novel high energy density long life power battery system of claim 5, wherein: the soft connecting piece (4) adopts a soft copper bar for electrical connection.

7. The novel high energy density long life power battery system of claim 1, wherein: the outer side of the case body (6) is provided with a commercial power input port; and the commercial power input port is connected with the lithium ion battery pack (1) in the case body (6) for supplying power.

8. The novel high energy density long life power battery system of claim 1, wherein: a plurality of groups of symmetrical fixing seats are arranged on the outer side of the case body (6).

Technical Field

The invention relates to a novel power battery system with high energy density and long service life, and belongs to the technical field of lithium ion batteries.

Background

In recent years, with the situation of increasingly severe energy and the continuous deterioration of global environment, energy exhaustion and environmental safety become increasingly worried problems of people, the living standard of people is continuously improved, high technology is continuously developed, energy conservation and environmental protection become common topics of people all over the world, and under the comprehensive consideration of energy transformation, curve overtaking in the automobile industry, reduction of fossil energy dependence, treatment and environmental protection, China starts to vigorously develop related industries of power batteries and new energy automobiles. The development of electric vehicles has many problems to be solved and perfected, such as motors, batteries and the like, and as a core energy source of the electric vehicles, the power batteries also have the problems of low energy density, short cycle life and the like at present. Meanwhile, the energy density and the service life of the power battery of the electric vehicle always influence and restrict the popularization and the application of the electric vehicle. The technical problem that the traditional power battery system is short in service life, heavy in mass, large in size and serious in pollution is urgently solved by people in the field, and the application of the novel power battery system with high energy density and long service life to electric automobiles is a necessary trend.

Disclosure of Invention

The invention aims to provide a novel high-energy-density long-service-life power battery system which can solve the problems of energy density and service life of a power battery.

The invention is realized by the following measures:

a novel power battery system with high energy density and long service life comprises a case body, a fixed support arranged in the case body, a plurality of groups of lithium ion battery packs and a high-voltage power supply; the lithium ion battery pack is connected with the high-voltage power supply and is fixed on the fixed support; the battery management system and the high-voltage control system are arranged in the case body; the battery management system and the high-voltage control system are both fixed on the fixed support; the battery management system is connected with the lithium ion battery pack and is used for monitoring and managing the lithium ion battery pack; the high-voltage control system is connected with the lithium ion battery pack and is used for controlling a high-voltage power supply of the lithium ion battery pack; a battery cell bracket is arranged on the outer side of the lithium ion battery pack; the battery cell bracket is used for fixing a battery chip in the lithium ion battery pack; soft connecting pieces are arranged on two sides of the upper end of the lithium ion battery pack; the soft connecting piece is used for electrically connecting a plurality of groups of lithium ion battery packs; the battery cell support and the flexible connecting piece are arranged in the case body and fixed on the fixing support.

As a further optimization scheme of the invention, the multiple groups of lithium ion battery packs adopt multiple groups of lithium ion battery standard modules which are connected in series.

As a further optimization scheme of the invention, the standard lithium ion battery module is formed by connecting 20 lithium ion battery chips in series and in parallel; the lithium ion battery chip adopts a 36Ah ternary lithium battery.

As a further optimization scheme of the invention, an aluminum sheet is arranged on the outer side of a battery chip in the lithium ion battery pack for heat dissipation.

As a further optimization scheme of the invention, the soft connecting piece adopts automobile-level components and connecting devices, and the redundancy of electrical parameter indexes is more than 150%.

As a further optimized scheme of the invention, the soft connecting piece adopts a soft copper bar for electrical connection.

As a further optimized scheme of the invention, the outer side of the case body is provided with a commercial power input port; and the commercial power input port is connected with a lithium ion battery pack in the case body to supply power.

As a further optimization scheme of the invention, a plurality of groups of symmetrical fixed seats are arranged on the outer side of the case body.

The invention has the beneficial effects that:

according to the technical scheme, the charge and discharge performance of the battery pack is protected through the battery management system, and the service life of the battery pack is more than 5 years due to the adoption of the ternary composite lithium battery; an aluminum plate heat conduction Pack structure is adopted, and the uniformity and good heat dissipation effect are guaranteed due to the internal temperature; the standard modular design idea is adopted, so that the installation and debugging are convenient; the electrical connection between the battery modules is carried out by adopting the flexible connection, so that the electrical safety and reliability are ensured; the automobile-level connector is adopted for external electrical connection of the battery pack, and meanwhile, the interlocking function is achieved, and safety and reliability of electrical connection are guaranteed.

Drawings

FIG. 1 is a schematic view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a schematic side view of the present invention;

FIG. 4 is a schematic diagram of a standard module of a lithium ion battery pack according to the present invention;

fig. 5 is a schematic view of a cell support according to the present invention;

in the drawings, 1-a lithium ion battery pack; 2-a battery management system; 3-cell support; 4-a flexible connector; 5-a high-voltage control system; 6-the cabinet body; and 61-fixing the bracket.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.

Referring to fig. 1 to 5, a novel high energy density long life power battery system includes a case body 6, a fixing bracket 61 arranged in the case body, a plurality of lithium ion battery packs 1, and a high voltage power supply; the lithium ion battery pack 1 is connected with a high-voltage power supply and is fixed on the fixing bracket 61; the battery management system 2 and the high-voltage control system 5 are arranged in the case body 6; the battery management system 2 and the high-voltage control system 5 are both fixed on the fixed bracket 61; the battery management system 2 is connected with the lithium ion battery pack 1 and is used for monitoring and managing the lithium ion battery pack 1; the high-voltage control system 5 is connected with the lithium ion battery pack 1 and is used for controlling a high-voltage power supply of the lithium ion battery pack 1; a cell bracket 3 is arranged on the outer side of the lithium ion battery pack 1; the battery cell bracket 3 is used for fixing a battery chip in the lithium ion battery pack 1; both sides of the upper end of the lithium ion battery pack 1 are provided with soft connecting pieces 4; the soft connecting piece 4 is used for electrically connecting a plurality of groups of lithium ion battery packs 1; the battery cell support 3 and the flexible connecting piece 4 are both arranged in the case body 6 and fixed on the fixing support 61.

The multi-group lithium ion battery pack 1 adopts a plurality of groups of lithium ion battery standard modules which are connected in series. The standard lithium ion battery module is formed by connecting 20 lithium ion battery chips in series and in parallel; the lithium ion battery chip adopts a 36Ah ternary lithium battery. An aluminum sheet is arranged on the outer side of a battery chip in the lithium ion battery pack 1 for heat dissipation. The soft connecting piece 4 adopts automobile-level components and connecting devices, and the redundancy of electrical parameter indexes is more than 150%. The flexible connecting piece 4 adopts a flexible copper bar for electrical connection. The outer side of the case body 6 is provided with a commercial power input port; the commercial power input port is connected with the lithium ion battery pack 1 in the case body 6 for supplying power. A plurality of groups of symmetrical fixing seats are arranged on the outer side of the case body 6.

The lithium ion battery pack 1 is connected in series by adopting a lithium ion battery standard module, a voltage platform can be designed according to requirements, and high system efficiency is ensured. The battery management system 2 (BMS) effectively protects the electric devices by protecting the charge and discharge performance of the battery pack and monitoring the voltage, current, and charge and discharge temperature of each battery. The battery cell support 3 is used for fixing a battery chip and enhancing the structural safety. The soft connecting piece 4 releases the vibration stress, and ensures the electrical safety and reliability. The electrical flexible connection is used for series-parallel connection among the electric cores, series connection among the modules, connection of all devices among the high-voltage control systems, and connection of the modules and the high-voltage devices.

When the system is used, the batteries are sorted according to internal resistance, capacity and voltage, so that the indexes of the batteries used by the system are consistent; 4 parallel connections are carried out on the battery pack, and then 5 parallel connections are carried out to form a standard lithium ion battery module; adding a heat-conducting aluminum sheet at the side part of a battery chip in the lithium ion battery standard module, conducting heat among the battery chips to achieve balance, and conducting heat through the bottom of the case body 6 and outside air; the lithium ion battery standard modules are electrically and flexibly connected through the soft copper bars, so that the vibration stress is decomposed, and the electrical safety is ensured. A relay can be additionally arranged at the general negative end of the case body 6, so that the case body 6 is ensured to be uncharged outside after power failure. A maintenance switch can be installed in the case body 6, and the battery can be overhauled under a lower voltage, so that the operation safety of personnel is ensured.

When the lithium ion battery pack management system is used, mains supply provides power for the lithium ion battery pack 1 through the mains supply input port, the battery management system 2 conducts charging and discharging management on the lithium ion battery pack 1, and the high-voltage control system 5 manages high-voltage electrical equipment. The case body 6 completes the combination of the whole system, is convenient to move and also plays a role in safety protection. The multiple groups of symmetrical fixing seats on the outer side of the case body 6 can be fixedly connected with the outside.

The technical scheme of the invention can be applied to logistics vehicles and passenger vehicles and all mobile tools operated for 24 hours, including dock trailers, light trucks and the like. The power battery system is a 140Wh/Kg high energy density system, overcomes the problems of low energy density, short cycle life and the like of the traditional power battery, and can be widely applied to the field of new energy automobiles.

The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.