Novel soft package battery cell module and battery pack

Abstract

The utility model relates to a novel soft package battery cell module and a battery pack in the field of battery modules. The novel soft package battery cell module comprises a soft package battery cell assembly, a busbar bracket, a busbar, an FPC (Flexible Printed Circuit), a bracket cover plate, a module lower shell, a heat-conducting structural adhesive, an epoxy plate, a heat-conducting silica gel pad and a module upper cover, the soft package battery cell assembly is formed by sequentially arranging and stacking a plurality of soft package battery cell units in the thickness direction of a battery cell, expansion foam is arranged between every two soft package battery cell units, the busbar support is connected with the module lower shell, an FPC is installed on the busbar support, and the soft package battery cell assembly and the module lower shell are connected through a heat conduction structural adhesive. The support cover plate is vertically arranged on the module lower shell, the module upper cover and the module lower shell are pre-fixed, the heat conduction silica gel pad is arranged between the module upper cover and the soft package battery cell assembly, and the epoxy plates are arranged on the outer side and the rear end of the soft package battery cell assembly. And the soft package battery cell and the C-shaped metal piece are bonded to form an integrated structure, so that the overall mechanical strength of the battery cell unit is enhanced, and the stability and reliability of the module are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery module, especially a novel soft package battery cell module and battery pack. BACKGROUND

[0002] With the rapid development of electric vehicles and energy storage systems, soft package lithium batteries are widely used due to their high energy density, flexible shape and other advantages. However, there are still some technical bottlenecks in the practical application of soft package battery cells, which restricts the further improvement of their performance:

[0003] 1. Poor mechanical properties of soft package battery cells, difficult to stack: soft package battery cells are packaged with aluminum plastic film, which has low structural strength and poor mechanical properties. During the stacking process, deformation and misalignment may occur, affecting the overall performance and reliability of the module;

[0004] 2. Low heat dissipation efficiency of traditional modules: traditional modules usually use single-sided heat dissipation at the bottom, which has limited heat dissipation area and cannot meet the heat dissipation requirements under high-power charging and discharging conditions, resulting in an increase in cell temperature and affecting battery life and safety;

[0005] 3. Low space utilization of traditional modules: traditional modules usually require installation end plates at both ends, which occupy a large space and are difficult to adapt to systems with limited module installation space, such as highly integrated battery packs or devices with limited space.

[0006] In order to solve the above problems, it is necessary to develop a new type of soft package battery cell module and battery pack to improve the mechanical properties, heat dissipation efficiency and space utilization of soft package battery cells, and meet the growing market demand. INVENTION CONTENTS

[0007] The utility model aims at the problems in the prior art and proposes a new type of soft package battery cell module and battery pack.

[0008] A new type of soft package battery cell module includes a soft package battery cell assembly, a bus bar support, a bus bar, an FPC, a support cover plate, a module lower shell, a heat conducting structural adhesive, an epoxy plate, a heat conducting silicone pad, and a module upper cover.

[0009] The soft package battery cell assembly is formed by arranging and stacking a plurality of soft package battery cell units in the thickness direction of the battery cell, and expansion foam is provided between two soft package battery cell units.

[0010] The bus bar support is connected to the module lower shell, and the FPC is installed on the bus bar support.

[0011] The soft package battery cell assembly and the module lower shell are connected by the heat conducting structural adhesive.

[0012] The bracket cover plate is erected on the module lower shell, and the module upper cover and the module lower shell are pre-fixed.

[0013] The heat-conducting silica gel pad is arranged between the module upper cover and the soft package battery cell assembly, and the epoxy plate is arranged on the outer side and the rear end of the soft package battery cell assembly.

[0014] Further, a novel soft package battery cell module, the soft package battery cell unit comprises a C-shaped metal piece, a fire-retardant double-sided adhesive, and a single battery cell.

[0015] The single battery cell is pasted to the inner side of the C-shaped metal plate through the fire-retardant double-sided adhesive.

[0016] Further, a novel soft package battery cell module, the bus bar support and the module lower shell are connected through bolts.

[0017] Further, a novel soft package battery cell module, the bus bar support is provided with a reinforcing rib higher than the bus bar, and the reinforcing rib is used for mounting an FPC.

[0018] Further, a novel soft package battery cell module, the module upper cover is provided with a U-shaped hole, the module upper cover is pre-fixed through the U-shaped hole and the module lower shell, and the module upper cover and the module lower shell are fixed to a battery pack mounting beam.

[0019] Further, a novel soft package battery cell module, the module lower shell is provided with a hoisting position for suspending a hook.

[0020] A novel soft package battery cell battery pack comprises a battery cell module and a battery pack box body.

[0021] The height of the transverse and longitudinal beams of the battery pack box body is lower than the height of the mounting position of the module lower shell.

[0022] A plurality of battery cell module mounting positions are arranged staggered in the battery pack box body.

[0023] The utility model discloses the beneficial effect:

[0024] 1. Improve mechanical strength, solve the stacking problem: the soft package battery cell and the C-shaped metal piece form an integrated structure through bonding, which significantly enhances the overall mechanical strength of the battery cell unit, effectively solves the problems of easy deformation and misplacement during the stacking of the soft package battery cell, and improves the stability and reliability of the module.

[0025] 2. Enhance the heat dissipation performance, and guarantee the use safety: the C-shaped metal piece acts as a heat-conducting medium, and the heat generated during the charging and discharging of the battery cell is efficiently dissipated through the upper and lower double-sided high-efficiency heat conduction, which greatly improves the heat dissipation efficiency of the module, effectively reduces the working temperature of the battery cell, reduces the risk of thermal runaway, and improves the safety and service life of the battery system.

[0026] 3. Optimizing structural design, improving energy density: the module cancels the traditional end plate structure, adopts the design scheme with less type and light weight of structural parts, effectively reduces the weight of the module, improves the mass energy density of the module, at the same time, the module installation position is staggered, the space of the battery box is maximized, and the overall volume energy density of the battery pack is improved;

[0027] 4. Simplify the installation process and improve production efficiency: the module installation position is arranged at the upper position of the module, which is convenient for the production personnel to align and install, simplifies the installation process, reduces the operation difficulty, and effectively improves the production efficiency;

[0028] 5. Improve the utilization rate of parts and reduce production cost: the battery box mounting beam not only plays the role of installing the module, but also can replace the module end plate to resist the swelling pressure of the soft package battery cell, realizes the multifunctional utilization of the parts, reduces the number of parts, reduces the production cost, and improves the grouping efficiency of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural exploded view of a new type of soft package battery cell module.

[0030] Figure 2 It is a structural view of a new type of soft package battery cell module.

[0031] Figure 3 It is a structural exploded view of a soft package battery cell unit.

[0032] Figure 4 It is a structural exploded view of a new type of soft package battery cell battery pack.

[0033] Figure 5 It is a schematic view of the staggered arrangement of the module installation position.

[0034] In the figure: 1-soft package battery cell assembly, 2-bus support, 3-bus, 4-FPC, 5-support cover plate, 6-module lower shell, 7-heat conducting structural adhesive, 8-epoxy plate, 9-heat conducting silicone pad, 10-module upper cover;

[0035] 11-soft package battery cell unit, 111-C-shaped metal part, 112-flame-retardant double-sided adhesive, 113-single battery cell;

[0036] 12-battery cell module, 13-battery pack box. DETAILED DESCRIPTION

[0037] In order to have a clearer understanding of the technical features, purposes and effects of the present application, the specific embodiments of the present application will be described with reference to the drawings.

[0038] As shown in the accompanying Figures 1-2As shown, a new soft package battery cell module includes a soft package battery cell assembly 1, a busbar support 2, a busbar 3, an FPC 4, a support cover plate 5, a module lower shell 6, a heat-conducting structural adhesive 7, an epoxy plate 8, a heat-conducting silica gel pad 9, and a module upper cover 10.

[0039] The soft package battery cell assembly 1 is formed by arranging and stacking a plurality of soft package battery cell units 11 in the thickness direction of the battery cell, and an expansion foam is arranged between two soft package battery cell units 11.

[0040] The busbar support 2 is connected with the module lower shell 6, and the busbar support 2 is provided with the FPC 4.

[0041] The soft package battery cell assembly 1 is connected with the module lower shell 6 through the heat-conducting structural adhesive 7.

[0042] The support cover plate 5 is erected on the module lower shell 6, and the module upper cover 10 and the module lower shell 6 are pre-fixed.

[0043] The heat-conducting silica gel pad 9 is arranged between the module upper cover 10 and the soft package battery cell assembly 1, and the epoxy plate 8 is arranged on the outer side and the rear end of the soft package battery cell assembly 1.

[0044] As shown in the accompanying drawings, Figure 3 A new soft package battery cell module includes a soft package battery cell unit 11, which includes a C-shaped metal piece 111, a flame-retardant double-sided adhesive 112, and a single battery cell 113.

[0045] The single battery cell 113 is adhered to the inner side of the C-shaped metal plate 111 through the flame-retardant double-sided adhesive 112.

[0046] Further, a new soft package battery cell module includes a busbar support 2 and a module lower shell 6 connected through a bolt.

[0047] Further, a new soft package battery cell module includes a busbar support 2 provided with a reinforcing rib higher than the busbar 3, and the reinforcing rib is used for mounting the FPC 4.

[0048] Further, a new soft package battery cell module includes a module upper cover 10 provided with a U-shaped hole, and the module upper cover 10 is pre-fixed with the module lower shell 6 through the U-shaped hole and is fixed with the module lower shell 6 to a battery pack mounting beam.

[0049] As shown in the accompanying drawings, Figures 4-5 A new soft package battery cell module includes a module lower shell 6 provided with a lifting position for hooking and suspending.

[0050] A new soft package battery cell battery pack includes a battery cell module 12 and a battery pack box 13.

[0051] The horizontal and vertical beam height of the battery pack box 13 is lower than the mounting position height of the module lower shell 6.

[0052] A plurality of battery cell modules 12 are arranged staggeredly in the battery pack box 13.

[0053] A novel soft package battery cell module and battery pack, the principle is:

[0054] One piece of expanded foam is arranged between the two soft package battery cell units 11 to absorb the expansion force of the battery cell, the soft package battery cell assembly 1 and the lower shell 6 of the module are connected by using heat-conducting structural adhesive 7, the overall strength and heat dissipation performance of the module are enhanced, the bus support 2 and the lower shell 6 of the module are connected by using bolts, the vibration and pulling of the bus support 2 on the tab are effectively avoided, the tab is prevented from being broken, the outer side and the rear end of the soft package battery cell assembly 1 are provided with epoxy plates 8, the soft package battery cell assembly 1 is conveniently installed into the lower shell 6 of the module, the height of the horizontal and vertical beams is slightly lower than the height of the installation position of the lower shell 6 of the module, and the soft package battery cell assembly 1 is installed into the cavity.

[0055] The scheme is characterized in that: the soft package battery cell is bonded with a C-shaped metal piece, the overall mechanical strength is enhanced, and the stacking problem is solved; the C-shaped metal piece is heat-conductive on both sides, the heat dissipation efficiency of the module is improved, the risk of thermal runaway is reduced, and the safety is improved; the end plate structure is cancelled, the types and quality of the structural parts are reduced, and the quality energy density of the module is improved; the module installation position is arranged at the middle and upper positions, the alignment and installation are facilitated, and the production efficiency is improved; the module installation positions are arranged staggeredly, the occupied space is reduced, and the volume energy density of the battery pack is improved; the battery box mounting beam has the functions of installation and resistance to battery cell expansion, and the utilization rate of parts and the grouping efficiency are improved.

[0056] The basic principle and main features of the utility model and the advantages of the utility model are shown and described. It should be understood by those skilled in the art that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A novel soft pack battery cell module, characterized by, It comprises a soft package battery cell assembly (1), a busbar support (2), a busbar (3), an FPC (4), a support cover plate (5), a module lower shell (6), a heat-conducting structural adhesive (7), an epoxy plate (8), a heat-conducting silica gel pad (9), and a module upper cover (10). The soft package battery cell assembly (1) is formed by arranging and stacking a plurality of soft package battery cell units (11) along the thickness direction of the battery cell. The busbar support (2) is connected with the module lower shell (6), and the busbar support (2) is provided with the FPC (4). The soft package battery cell assembly (1) is connected with the module lower shell (6) through the heat-conducting structural adhesive (7). The support cover plate (5) is erected on the module lower shell (6), and the module upper cover (10) and the module lower shell (6) are pre-fixed. The heat-conducting silica gel pad (9) is arranged between the module upper cover (10) and the soft package battery cell assembly (1), and the epoxy plate (8) is arranged on the outer side and the rear end of the soft package battery cell assembly (1).

2. The novel soft-pack battery cell module of claim 1, wherein, The soft package battery cell unit (11) comprises a C-shaped metal piece (111), a flame-retardant double-sided adhesive (112), and a single battery cell (113). The single battery cell (113) is adhered to the inner side of the C-shaped metal piece (111) through the flame-retardant double-sided adhesive (112).

3. The novel soft-pouch battery cell module of claim 1, wherein, The busbar support (2) is connected with the module lower shell (6) through bolts.

4. The novel soft-pouch battery cell module of claim 1, wherein, The busbar support (2) is provided with a reinforcing rib higher than the busbar (3), and the reinforcing rib is used for mounting the FPC (4).

5. The novel soft-pouch battery cell module of claim 1, wherein, The module upper cover (10) is provided with a U-shaped hole, the module upper cover (10) is pre-fixed with the module lower shell (6) through the U-shaped hole, and the module upper cover (10) and the module lower shell (6) are fixed to a battery pack mounting beam.

6. The novel soft-pouch battery cell module of claim 1, wherein, The module lower shell (6) is provided with a hoisting position for suspending a hook.

7. A new type of soft package battery cell package, based on a new type of soft package battery cell module according to any one of claims 1-6, characterized in that, It comprises a battery cell module (12) and a battery pack box body (13). The height of the transverse and longitudinal beams of the battery pack box body (13) is lower than the height of the mounting position of the module lower shell (6). A plurality of battery cell module (12) mounting positions are arranged staggered in the battery pack box body (13).

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