CN201758151U - Novel battery module - Google Patents

Abstract

The utility model belongs to the field of batteries, and in particular relates to a lithium ion battery module, which includes a lithium ion battery and a battery box. The top of the lithium ion battery is provided with a positive pole ear and a negative pole ear. The battery box is composed of four side plates and a bottom plate. There is a base on the bottom plate, a groove is arranged in the base, a lithium-ion battery is inserted in each groove, a gap is set between every two lithium-ion batteries, and a side plate perpendicular to the plane where the gap is located is set. There is a fan, and there is a ventilation hole on the other side plate parallel to the side plate where the fan is located. The positive tab of each lithium-ion battery is fixed on a connector to form the positive pole of the battery module. The negative pole tab is fixed on another connector to form the negative pole of the battery module. The lithium-ion battery module not only has a simple structure, but also has good heat dissipation performance, which can improve the consistency between lithium-ion batteries and the service life of the whole battery module, and has broad market prospects.

Description

A new type of battery module

technical field

The utility model belongs to the field of batteries, in particular to a novel battery module suitable for electric vehicles and energy storage systems.

Background technique

As primary energy such as oil, natural gas and other resources become more and more scarce, human beings are faced with severe challenges that the living environment may continue to deteriorate. In order to reduce energy costs and realize the sustainable development of the world, countries all over the world have carried out research on electric vehicles and energy storage technology. The idea is to use batteries with high power capacity as the power system and energy storage system. Therefore, choosing the right battery has become one of the keys to the development of electric vehicle energy storage technology.

Currently, the batteries used in electric vehicles and energy storage systems are mainly high-capacity lithium-ion batteries. Lithium-ion batteries have the advantages of high energy density, long life, no memory effect, and no pollution. They have been widely used in electric vehicles and energy storage systems. Soft-pack lithium-ion batteries have become the mainstream product of lithium-ion power batteries due to their good safety and low production cost. However, due to their soft shells, when the batteries are used in different mechanical environments, they are easy to scratch Broken surface shell. In addition, the shell of the soft package cannot effectively prevent the expansion of the battery during charging and discharging, resulting in unstable electrochemical performance during long-term use, and the service life of the battery is reduced. Therefore, when flexible packaging lithium-ion batteries are used in groups, it is necessary to apply a certain compressive force on the outside of the battery in a direction perpendicular to the plane of the positive and negative electrodes of the battery, so that the expansion of the battery is limited.

Since high-voltage and high-capacity battery packs are required in electric vehicles and energy storage systems, lithium-ion batteries need to be connected in series and parallel before they can be used. Lithium-ion batteries generate heat during the charging and discharging process. When the batteries are connected in series and parallel, due to the small gap between the batteries and the insufficient ventilation of the box, there will be a large temperature difference between the cells. Lithium-ion batteries are greatly affected by temperature. When the battery temperature is different, it will cause inconsistencies in the whole box of batteries, which will affect the service life of the whole battery pack and leave potential safety hazards. In the existing battery modules, all the batteries are usually placed side by side in the battery box and clamped and fixed by the battery separator. The battery module with this structure has a poor heat dissipation effect, and it is difficult to ensure the consistency of the service conditions of all batteries.

Utility model content

In order to overcome the above-mentioned defects of the prior art, the purpose of this utility model is to provide a new type of battery module with good ventilation and heat dissipation, and can improve the safety and service life of the battery module.

The utility model is achieved through the following technical solutions:

A new type of battery module, including a battery pack composed of batteries and a battery box arranged outside the battery pack, the top of the battery is provided with a positive tab and a negative tab, the battery box is composed of four side plates and a bottom plate, It is characterized in that: the bottom plate of the battery box is provided with a base, the base is provided with a groove, and a battery is inserted in each groove, and a gap is provided between every two lithium-ion batteries, and the gap is located A fan is provided on one side plate perpendicular to the plane, and a ventilation hole is provided on the other side plate parallel to the side plate where the fan is located. The positive tab of each battery is fixed on a connector to form the positive pole of the battery module. Fixing the negative tab of each battery on another connector constitutes the negative pole of the battery module.

Wherein, the battery is composed of a soft-packed lithium-ion battery and a hard insulating shell sheathed outside it.

Wherein, the connecting piece adopts a strip-shaped copper bar, and the lower end of the copper bar is provided with an inner groove, and each inner groove is provided with a through hole, and the positive tab and the negative tab are provided with mounting holes. The positive and negative tabs are bent and snapped into the corresponding inner grooves, and the positive tabs of each battery are connected to one connecting piece and the negative tabs are connected to the other connecting piece with fasteners.

Wherein, the battery box is in the shape of a cube with an upper opening.

The beneficial effects of the utility model are:

1) In the utility model, all the batteries are fixed in the battery box through a base with a groove, which increases the gap between the batteries. The heat dissipation of each battery is very uniform and the working environment is kept uniform, which makes the heat dissipation performance of the battery pack better, which not only improves the consistency among all batteries, but also prolongs the service life of the entire battery module;

2) The utility model wraps a layer of hard insulating shell on the outside of each soft-packed lithium-ion battery, which plays a good role in protecting all soft-packed lithium-ion batteries and improves the safety of the battery module during use;

Description of drawings

Figure 1 is a schematic structural view of a soft-pack lithium-ion battery;

Figure 2 is a schematic structural view of a single battery;

Fig. 3 is the structural representation of base;

Fig. 4 is the structural representation of connector;

Fig. 5 is a schematic diagram of the internal structure of the battery module of the present invention after removing the side plate with ventilation holes;

Fig. 6 is a schematic diagram of the front structure of the battery module of the present invention;

Fig. 7 is a schematic diagram of the rear structure of the battery module of the present invention;

In the figure, 1-lithium-ion battery, 2-positive ear, 3-negative ear, 4-battery box, 5-base, 6-groove, 7-gap, 8-fan, 9-ventilation hole, 10-connector , 11-soft packaging lithium-ion battery, 12-hard insulating shell, 13-inner groove, 14-through hole, 15-installation hole, 16-terminal.

Detailed ways

The lithium-ion battery module in the present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 2, the battery 1 in this example is composed of a soft-packed lithium-ion battery 11 and a hard insulating casing, the soft-packaged lithium-ion battery 11 is placed in a hard insulating casing 12, and the positive pole ear 2 and the negative pole ear 3 are exposed on the hard shell. Quality insulation shell 12 outside. The hard insulating case acts as a compressive force on the soft-packaged lithium-ion battery 11 to prevent the expansion of the soft-packaged lithium-ion battery during charging and discharging. The hard insulating case 12 can be made of a hard plastic plate. As shown in Figure 1, the soft-pack lithium-ion battery 11 is flat with a certain thickness, and has two tabs on its top: a positive tab 2 and a negative tab 3, and a circular mounting hole is opened on each tab. 15.

As shown in Figure 3, the base 5 placed at the bottom of the battery box is rectangular, and a groove 6 suitable for the battery is provided in it, and a battery 1 is inserted in each groove 6, and the groove acts on the bottom of the battery. fixation.

As shown in Figure 4, the connector 10 adopts a strip-shaped copper bar, and its lower end is provided with an inner groove 13 corresponding to the battery 1, and each inner groove is provided with a through hole 14 for connecting the tabs. , the connecting piece 10 is also provided with terminal posts 16 for realizing series and parallel connection between the battery modules.

As shown in Figure 5-7, the new battery module described in this example includes seven lithium-ion batteries 1 and a battery box 4, the battery box is a cube, which consists of four side plates and a bottom plate perpendicular to the side plates , the base plate in the battery box is provided with a base 5, and seven grooves 6 are arranged in the base, and a lithium-ion battery 1 is inserted in each groove. Since the grooves are separated by a certain distance, every two Each battery 1 is provided with a slit 7, a fan 8 is arranged on a side plate perpendicular to the plane where the slit is located, and a ventilation hole 9 is provided on the other side plate parallel to the side plate where the fan is located.

In actual use, the soft-pack lithium-ion battery 11 is first put into the hard insulating casing 12, and then inserted into the groove 6 of the base 5 in the battery box in sequence, and then the positive pole ears 2 of the seven batteries 1 are bent and then snapped into place. After being connected to the inner groove 13 of the connector, bolts are passed through the through hole 14 on the connector and the mounting hole 15 on the positive tab in sequence, and the positive tabs 2 of seven batteries 1 are fixed to one connector 10 to form a The positive pole of the battery module; similarly, bend the negative tabs 3 of the seven batteries 1 and clip them into the inner groove 13 of the connector, and use bolts to pass through the through holes 14 on the connector and the holes on the negative tab in turn. After the holes 15 are installed, fix the negative pole ears 3 of the seven batteries 1 to another connector 10 to form the negative pole of the battery module, and each of the two connectors 10 is provided with a binding post 16: it is installed on the connection of the positive pole ear. The one on the component 10 is called the positive terminal, and the one installed on the connecting piece 10 connected to the negative tab is called the negative terminal. The series and parallel connection between the battery modules can be realized through the positive and negative terminals. During use, the fan 8 blows air to the gaps between the batteries 1 in the battery box, so that the heat generated by the batteries 1 can be dissipated from the ventilation holes on the other side. The battery module adopting the above structure is not only simple in structure, but also has good heat dissipation performance, which not only improves the consistency among the batteries 2, but also prolongs the service life of the whole battery module, and has broad market prospects.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit them. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: it is still possible Any modification or equivalent replacement made to the specific implementation of the present utility model without departing from the spirit and scope of the present utility model shall be covered by the claims of the present utility model.

Claims (4)

1. novel battery module, comprise battery pack of forming by battery (1) and the battery case (4) that is located at the battery pack outside, the top of described battery (1) is provided with anode ear (2) and negative electrode lug (3), described battery case (4) is made up of four side plates and a base plate, it is characterized in that: the base plate of described battery case is provided with base (5), be provided with groove (6) in the described base, plug a battery (1) in each groove, be equipped with slit (7) between per two lithium ion batteries, a side plate perpendicular with plane, place, slit is provided with fan (8), another side plate that parallels with fan place side plate is provided with ventilation hole (9), the anode ear (2) of each battery (1) is fixed on the last positive pole that constitutes this battery module of a connection piece (10), the negative electrode lug (3) of each battery (1) is fixed on the negative pole of this battery module of the last formation of another connector (10).

2. novel battery module as claimed in claim 1 is characterized in that: described battery (1) by flexible packing lithium ion battery (11) and be set in its outside rigid insulation shell (12) form.

3. novel battery module as claimed in claim 1 or 2, it is characterized in that: described connector (10) adopts the strip copper bar, the lower end of described copper bar is provided with inner groovy (13), on each inner groovy, be equipped with a through hole (14), described anode ear (2) and negative electrode lug (3) are provided with installing hole (15), will anode ear (2) and negative electrode lug (3) bending after snap fit onto in the inner groovy corresponding (13) with it, with securing member the anode ear of each battery (1) is connected a connector (10) and goes up, negative electrode lug is connected on another connector (10).

4. novel battery module as claimed in claim 1 is characterized in that: described battery case (4) is the cube shaped of upper shed.

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