CN214797542U

CN214797542U - Box structure of 48V start-stop battery

Info

Publication number: CN214797542U
Application number: CN202121910242.6U
Authority: CN
Inventors: 李祥俊; 刘长来; 夏诗忠; 孙光忠; 程聪
Original assignee: Camel Group New Energy Battery Co Ltd
Current assignee: Camel Group New Energy Battery Co Ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2021-11-19
Anticipated expiration: 2031-08-16

Abstract

A box body structure of a 48V start-stop battery comprises a shell, wherein the shell is an open groove enclosed by four side walls and a bottom wall, a battery cell module is arranged in the shell and consists of a plurality of soft-packaged battery cells with positive and negative electrode lugs which are stacked in parallel, the positive and negative electrode lugs of each soft-packaged battery cell face to the open side of the upper end of the shell, the soft-packaged battery cells are connected into a whole through heat-conducting glue and/or phase-change materials, and epoxy plates are respectively pasted on the outer side surfaces of two soft-packaged battery cells at the outermost side of the battery cell module; a plurality of fins are uniformly distributed on the outer peripheral wall of the shell and extend along the length direction of the shell; the shell is also filled with heat-conducting glue. The structure design is reasonable and simple, the cost is lower, and the heat dissipation effect is obviously improved.

Description

Box structure of 48V start-stop battery

Technical Field

The utility model belongs to the technical field of open and stop battery PACK, concretely relates to box structure that 48V opened and stops the battery.

Background

The internal heat dissipation effect of the existing 48V battery box is poor, when the battery is used on an automobile, the internal temperature of the battery box is over 60 ℃, the BMS of the 48V battery system heat management system can control the output power of the battery, and when the output power is small, the kinetic energy is insufficient, so that the customer experience effect is possibly poor; and the temperature difference consistency among the electric cores in the existing 48V battery box body is poor, the local temperature often exceeds 60 ℃, and at the moment, the BMS of the 48V battery system heat management system can also perform misoperation according to the temperature to control the output power of the battery, so that the customer experience is seriously influenced.

Disclosure of Invention

The utility model aims at overcoming not enough in the above-mentioned technique, and provide a 48V and open the box structure of opening the battery, structural design is reasonable, simple, and the cost is lower, and the radiating effect obviously improves.

The technical scheme of the utility model is that: a box body structure of a 48V start-stop battery comprises a shell, wherein the shell is an open groove enclosed by four side walls and a bottom wall, a battery cell module is arranged in the shell and consists of a plurality of soft-packaged battery cells with positive and negative electrode lugs which are stacked in parallel, the positive and negative electrode lugs of each soft-packaged battery cell face to the open side of the upper end of the shell, the soft-packaged battery cells are connected into a whole through heat-conducting glue and/or phase-change materials, and epoxy plates are respectively pasted on the outer side surfaces of two soft-packaged battery cells at the outermost side of the battery cell module; a plurality of fins are uniformly distributed on the outer peripheral wall of the shell and extend along the length direction of the shell; the shell is also filled with heat-conducting glue.

The liquid level of the heat-conducting glue in the shell is 70-80% of the height of the shell. The whole shell is not filled up with the heat-conducting glue, and a space is reserved for the heating expansion of the battery cell module.

The battery cell module is located between a plurality of adjacent soft-packaged battery cores at middle part and is connected with phase change material through heat conduction glue, is located between a plurality of adjacent soft-packaged battery cores at both ends and is connected with each other through heat conduction glue. The soft-packaged battery cell at the middle part is far away from the shell, the heat dissipation is slow, and the phase-change material is added at the middle part to balance the temperature difference between the middle soft-packaged battery cell and the end soft-packaged battery cell.

The shell is made of aluminum alloy materials.

Every the epoxy board is close to the open end of casing and is equipped with the draw-in groove, and the extension board top at plastic carrier both ends is equipped with the trip of fixing with the draw-in groove cooperation, and the extension board is perpendicular with plastic carrier, and to the inside vertical extension of casing.

The utility model discloses a radiating fin, heat-conducting glue and the phase change material locating place of casing make electric core monomer highest temperature be less than or equal to 60 ℃, the difference in temperature requirement between the electric core is less than or equal to 5 ℃, restrain the battery limit merit effectively.

The utility model discloses a carrier not only can be supported to two epoxy boards, can completely cut off the contact of the soft-packaged electrical core at both ends and casing simultaneously, prevents that electricity core module both ends heat dissipation too fast, effectively guarantees the inside difference in temperature of battery.

The utility model discloses remove the heat dissipation aluminum sheet in the conventional design of module, the carrier is direct to be supported through the epoxy board, removes and supports the boss, and the cost is practiced thrift in the lightweight design, helps improving the efficiency in groups and the energy density of module simultaneously.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the explosion structure of the present invention;

in the figure: 1. the shell, 3, soft package electricity core, 4, phase change material, 5, epoxy board.

Detailed Description

In fig. 1 and fig. 2, the utility model discloses a box assembly comprises aluminum alloy casing 1, square laminate polymer core 3, phase change material 4, epoxy 5, and casing 1 is an uncovered recess by wall and diapire besieged city, and the equipartition has a plurality of fins on casing 1's the periphery wall, and a plurality of fins extend along casing 1's length direction. The fins serve to dissipate heat from the battery and may serve to reinforce the strength of the case 1. The battery core module is formed by stacking 14 square soft-packaged battery cores 3 in parallel, two-component heat conduction glue is adhered between the adjacent soft-packaged battery cores 3, phase change materials 4 are further attached between the No. 5-10 soft-packaged battery cores 3 positioned at the middle part, the battery cores after being grouped are connected into a whole, the vibration resistance is high, the phase change materials 4 and the heat conduction glue are insulating heat conduction materials, the heat of the battery core module can be led out, and the connection fixing effect is achieved. The phase-change material 4 is used for replacing a heat-radiating aluminum plate, the heat radiation in the battery can be accelerated due to the better heat conduction effect of the phase-change material 4, and meanwhile, the phase-change material 4 is lighter than the heat-radiating aluminum plate in weight; because the soft-packaged electrical core 3 of middle part is far away from casing 1, increase phase change material 4 between several soft-packaged electrical cores in the middle of can balance the difference in temperature between soft-packaged electrical core in the middle of and the tip soft-packaged electrical core, simultaneously under the prerequisite of guaranteeing the radiating effect, only increase phase change material 4 in the middle of can save the cost. Electric core module is installed in casing 1, an epoxy board 5 has respectively been placed at both ends about electric core module, every epoxy board 5 is close to casing 1 open end and is equipped with the draw-in groove, the extension board top at plastic carrier both ends is equipped with the trip fixed with the draw-in groove cooperation, it is perpendicular with the plastic carrier to extend the board, and to the inside vertical extension of casing, electric core module just, negative pole utmost point ear passes behind the groove of passing through on the plastic carrier, the draw-in groove on epoxy board 5 is hooked to the trip at plastic carrier middle part, epoxy board 5 is used for firstly supporting the plastic carrier, epoxy board 5 another effect is the contact of soft-packaged electric core 3 and casing 1 that can completely cut off both ends, prevent that electric core module both ends heat dissipation is too fast, effectively guarantee the inside difference in temperature of battery. After the lug of the battery cell module is installed on the plastic carrier, the lug of the battery cell module is rolled into 180 degrees through rolling equipment and is fixed on the plastic carrier. Battery core module is placed in aluminum alloy casing 1 in groups and is poured into 720 +/-10 g two-component heat-conducting glue and fix, and the liquid level that the heat-conducting glue was located 70~80% position department of casing 1 height, can effectually derive the inside heat of battery to aluminum alloy's casing 1 on, finally have aluminum alloy casing 1 to dispel the heat. Whole casing 1 is not filled up to the heat-conducting glue, has reserved the space for the battery core module inflation that generates heat. The card hole on the flexible line way board is spacing after 2 buckles are fully contacted with the plastic carrier, and the utmost point ear of electricity core module adopts the laser welding mode, can guarantee the reliability of electricity connection, can improve the efficiency and the mechanical properties in groups of module again.

Claims

1. The utility model provides a box structure of 48V opens and stops battery which characterized in that: the battery comprises a shell (1), wherein the shell (1) is an open groove formed by four side walls and a bottom wall in a surrounding manner, a battery cell module is arranged in the shell (1), the battery cell module is formed by stacking a plurality of soft-packaged battery cells (3) with positive and negative electrode tabs in parallel, each soft-packaged battery cell (3) is positive, the negative electrode tabs face the open side of the upper end of the shell (1), the soft-packaged battery cells (3) are connected into a whole through heat-conducting glue and/or phase-change materials (4), and epoxy plates (5) are respectively pasted on the outer side surfaces of two soft-packaged battery cells (3) at the outermost side of the battery cell module; a plurality of fins are uniformly distributed on the outer peripheral wall of the shell (1), and extend along the length direction of the shell (1); the shell (1) is filled with heat-conducting glue.

2. The box structure of a 48V start-stop battery of claim 1, which is characterized in that: the liquid level of the heat-conducting glue in the shell (1) is 70-80% of the height of the shell (1).

3. The box structure of the 48V start-stop battery according to claim 1 or 2, characterized in that: the battery cell module is located between a plurality of adjacent soft-packaged battery cores (3) at middle part and is connected with phase-change material (4) through heat-conducting glue, and is located between a plurality of adjacent soft-packaged battery cores (3) at both ends and is connected with each other through heat-conducting glue.

4. The box structure of the 48V start-stop battery according to claim 1 or 2, characterized in that: the shell (1) is made of an aluminum alloy material.

5. The box structure of a 48V start-stop battery of claim 1, which is characterized in that: every epoxy board (5) are close to the open end of casing (1) and are equipped with the draw-in groove, and the extension board top at plastic carrier both ends is equipped with the trip of fixing with the draw-in groove cooperation, and the extension board is perpendicular with plastic carrier, and to the inside vertical extension of casing.