CN111834576A - A kind of cell hybrid parallel battery - Google Patents

Abstract

The invention discloses an electric core hybrid parallel battery, which aims to provide an electric core hybrid parallel battery with high space utilization rate and improved battery capacity. The present invention includes a battery casing, a protective plate and at least one set of battery modules are arranged in the battery casing, and the battery module includes a connector, a first battery and a second battery, and the first battery is connected to the protection board, and the second battery core is arranged on the protection board through the connecting piece. The present invention is applied to the technical field of batteries.

Description

A kind of cell hybrid parallel battery

technical field

The invention relates to an electric core hybrid parallel battery.

Background technique

In recent years, with the thinner and lighter shape design of notebook computers, the size and space of batteries are becoming more and more compact, and the requirements for special-shaped batteries are gradually increasing. In the context of the current bottleneck in the improvement of cell energy density, the requirements for space utilization of battery packaging design are getting higher and higher. At present, the notebook battery industry mainly uses the same type of cells for parallel design. In this form, when the battery packaging size is more complex, the battery design is not compact enough in overall space, and the space utilization rate is seriously insufficient. The capacity is low and cannot meet the needs of customers.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and to provide a cell hybrid parallel battery with high space utilization and improved battery capacity.

The technical solution adopted by the present invention is as follows: the present invention includes a battery casing, wherein a protective plate and at least one set of battery cell modules are arranged in the battery casing, and the battery core modules include a connector, a first battery core and a second battery core. A battery cell, the first battery core is connected to the protection board, and the second battery cell is arranged on the protection board through the connecting piece.

Further, the ratio of the capacity of the first cell to the capacity of the second cell is inversely proportional to the ratio of the internal resistance of the first cell to the internal resistance of the second cell.

Further, the capacity of the first battery cell is not more than twice the capacity of the second battery cell.

Further, the connecting member is a wire or a bus bar.

Further, the first battery core is disposed on the second battery core through double-sided tape.

Further, the number of the battery core modules is two groups, and the two groups of the battery core modules are respectively connected on both sides of the protection board.

Further, the battery casing includes a plastic frame and a cover plate, the cover plate is arranged on the plastic frame, the lower end surface of the plastic frame is provided with a first film layer, and the plastic frame has two openings , the opening is provided with a second film layer, the two groups of the battery core modules are respectively arranged on the two second film layers, and are arranged between the plastic frame and the cover plate, the A second textured paper is arranged on the protection plate, a first textured paper is arranged on the connecting piece, and a second double-sided tape is arranged between the cover plate and the battery core module.

Further, the second battery cell is welded on the connector by laser, and the connector is welded on the protection plate by laser.

Further, the first battery cell and the second battery core select an appropriate circuit breaker according to the temperature rise of the parallel shunt.

The beneficial effects of the present invention are: compared to the deficiencies of the prior art, in the present invention, the first battery cell and the second battery core are batteries of the same material voltage system, the same energy density and different external dimensions, The arrangement of the second battery cell on the protection board through the connecting piece enables the second battery cell to be placed in a space far away from the protection board, so that the first battery cell and the The second battery cell can effectively utilize the battery space, so that the space utilization rate is increased by more than 30%, and the capacity is increased by more than 30%. Therefore, the present invention has the advantages of high space utilization rate and improved battery capacity.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of the present invention;

Fig. 2 is an exploded view of the present invention;

Fig. 3 is the plane structure schematic diagram of the present invention;

FIG. 4 is a schematic three-dimensional structure diagram of the present invention from another perspective.

Detailed ways

As shown in FIG. 1 to FIG. 4 , in this embodiment, the present invention includes a battery casing 1 . The battery casing 1 is provided with a protective plate 4 and at least one set of battery modules 5 . The battery modules 5 It includes a connector 2 , a first cell 6 and a second cell 7 , the first cell 6 is connected to the protection board 4 , and the second cell 7 is arranged on the On the protection board 4 , the first cell 6 is arranged on the second cell 7 . Compared with the deficiencies of the prior art, in the present invention, the first battery cell 6 and the second battery cell 7 are the same material and voltage system, the same energy density and different external dimensions of the battery cells, the second battery cell The arrangement of the core 7 on the protection board 4 through the connection piece 2 enables the second battery cell 7 to be placed in a space away from the protection board 4 , so that the first battery cell 6 can be placed in a space away from the protection board 4 And the second battery cell 7 can effectively utilize the battery space, so that the space utilization rate is increased by more than 30%, and the capacity is increased by more than 30%, so that the present invention has the advantages of high space utilization rate and improved battery capacity.

In this embodiment, the ratio of the capacity of the first cell 6 to the capacity of the second cell 7 and the internal resistance of the first cell 6 and the internal resistance of the second cell 7 The ratio is inversely proportional. According to Ohm's law of a parallel circuit, when the capacity ratio of the first cell 6 and the second cell 7 is 1:2, the internal resistance ratio of the first cell 6 and the second cell 7 It should be 2:1, and this setting can realize that the first battery cell 6 and the second battery cell 7 can perform current charging and discharging at the same rate.

In this embodiment, the capacity of the first battery cell 6 is not greater than twice the capacity of the second battery cell 7 . The arrangement that the capacity of the first battery cell 6 is not greater than twice the capacity of the second battery cell 7 can improve the space utilization rate and the battery capacity.

In this embodiment, the connector 2 is a wire or a bus bar, and when the impedance matching between the first cell 6 and the second cell 7 is difficult to satisfy, the connector 2 can be modified during design to optimize the impedance matching between the second cell 6 and the second cell 7 . The internal resistance of the bus bar or wire should be impedance matched with the first cell 6 and the second cell 7, and the ratio of the impedance to the capacity of the first cell 6 and the second cell 7 is not equal. During coordination, the internal resistance ratio of the cells can be optimized by changing the internal resistance of the wires or bus bars connected in series to the second cell 7 .

In this embodiment, the first battery core 6 is disposed on the second battery core 7 through double-sided tape.

In this embodiment, the number of the battery core modules 5 is two groups, and the two groups of the battery core modules 5 are respectively connected on both sides of the protection board 4 .

In this embodiment, the battery case 1 includes a plastic frame 9 and a cover plate 10 , the cover plate 10 is cooperatively arranged on the plastic frame 9 , and a first film layer 11 is disposed on the lower end surface of the plastic frame 9 , the plastic frame 9 is provided with two openings 12, the openings 12 are provided with a second film layer 13, and the two groups of the battery modules 5 are respectively arranged on the two second film layers 13, and is arranged between the plastic frame 9 and the cover plate 10 , a second masking paper 14 is arranged on the protection plate 4 , a first masking paper 15 is arranged on the connecting member 2 , and the cover A second double-sided adhesive tape 32 is disposed between the board 10 and the cell module 5 .

In this embodiment, the second battery cell 7 is welded on the connecting member 2 by laser welding, and the connecting member 2 is welded on the protection plate 4 by laser welding.

In this embodiment, the first cell 6 and the second cell 7 need to select respective suitable breakers according to the temperature rise of the parallel shunt to avoid malfunction of the breaker.

Although the embodiments of the present invention are described in terms of actual solutions, they do not constitute a limitation on the meaning of the present invention. For those skilled in the art, modifications to the embodiments and combinations with other solutions are obvious to those skilled in the art according to this specification. .

Claims (9)

1. A cell hybrid parallel battery, characterized in that it comprises a battery casing (1), wherein a protective plate (4) and at least one set of cell modules (5) are provided in the battery casing (1), so that The cell module (5) includes a connector (2), a first cell (6) and a second cell (7), and the first cell (6) is connected to the protection board (4) , the second battery cell (7) is arranged on the protection plate (4) through the connecting piece (2). 2. The hybrid parallel battery according to claim 1, characterized in that: the ratio of the capacity of the first battery (6) to the capacity of the second battery (7) is the same as the ratio of the capacity of the first battery (6) to the capacity of the second battery (7). The ratio of the internal resistance of a cell (6) to the internal resistance of the second cell (7) is inversely proportional. 3 . The hybrid parallel battery with cells according to claim 1 , wherein the capacity of the first cell ( 6 ) is not greater than twice the capacity of the second cell ( 7 ). 4 . 4 . The hybrid parallel battery with cells according to claim 1 , wherein the connecting member ( 2 ) is a wire or a bus bar. 5 . 5 . The hybrid parallel battery with cells according to claim 1 , wherein the first cell ( 6 ) is arranged on the second cell ( 7 ) through a first double-sided adhesive tape ( 31 ). 6 . superior. 6 . The hybrid parallel battery according to claim 1 , wherein the number of the battery modules ( 5 ) is two groups, and the two groups of the battery modules ( 5 ) are respectively connected to both sides of the protection plate (4). 7. The hybrid parallel battery according to claim 6, characterized in that: the battery casing (1) comprises a plastic frame (9) and a cover plate (10), and the cover plate (10) is arranged in coordination On the plastic frame (9), a first film layer (11) is provided on the lower end surface of the plastic frame (9), and two openings (12) are opened on the plastic frame (9). (12) is provided with a second film layer (13), and two groups of the cell modules (5) are respectively arranged on the two second film layers (13) and are arranged on the plastic frame (9) ) and the cover plate (10), a second textured paper (14) is arranged on the protection plate (4), and a first textured paper (15) is arranged on the connecting member (2), A second double-sided adhesive tape (32) is arranged between the cover plate (10) and the battery core module (5). 8 . The hybrid parallel battery with cells according to claim 1 , wherein the second cell ( 7 ) is welded on the connector ( 2 ) by laser welding, and the connector ( 2 ) on the protective plate (4) by laser welding. 9 . The hybrid parallel battery of claim 1 , wherein the first battery ( 6 ) and the second battery ( 7 ) are selected according to the temperature rise of the parallel shunt. 10 . breaker.

Images