Double-layer soft package liquid cooling module structure

Abstract

The utility model discloses a double-layer soft package liquid cooling module structure which comprises a battery module, the battery module comprises side plates, the side plates are arranged on the two sides of the battery module, fixing plates are arranged at the top and the bottom of the battery module, fixing end plates are arranged at the two ends of the battery module, and a liquid cooling plate is arranged between the fixing end plates. The top end and the bottom end of the liquid cooling plate are provided with cell stacks, the liquid cooling plate is internally provided with a flow channel, two ends of the liquid cooling plate are provided with sealing strips, and the sealing strips are used for sealing the flow channel; by adopting the double-layer battery cell arrangement, the longitudinal height of the battery cell is reduced, the temperature control of the battery in the high-rate charging and discharging process is facilitated, the service life of the battery cell is not shortened due to overlarge temperature difference, and the alarm misjudgment in the battery using process due to distortion of collected temperature is not easily caused; and the energy density is improved.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion batteries, and in particular to a double-layer soft-pack liquid-cooled module structure. Background Technology

[0002] A battery module is a group of batteries composed of several individual cells and related mounting structures. A standard battery module structure has multiple individual cells, and different battery modules use different numbers and sizes of cells.

[0003] Existing battery modules use a single-layer cell arrangement, which results in excessively high vertical cell height. This makes it difficult to control the battery temperature during high-rate charging and discharging, and the cell lifespan is easily reduced due to excessive temperature differences. It is also prone to false alarms during battery use due to distortion of temperature data. In addition, the single-layer cell arrangement reduces the number of cells in the battery module, reduces energy density, and makes it less practical.

[0004] To address these issues, we propose a double-layer soft-pack liquid-cooled module structure. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a double-layer soft-pack liquid-cooled module structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A double-layer soft-pack liquid-cooled module structure includes a battery module, the battery module including side plates disposed on both sides of the battery module, fixing plates disposed on the top and bottom of the battery module, fixing end plates disposed at both ends of the battery module, a liquid-cooling plate disposed between the fixing end plates, a cell stack disposed at the top and bottom of the liquid-cooling plate, a flow channel disposed inside the liquid-cooling plate, and sealing strips disposed at both ends of the liquid-cooling plate to seal the flow channel.

[0008] More preferably, thermal insulation foam is provided between the battery cell stack and the fixing plate, and the thermal insulation foam is fixed to the battery cell stack and the fixing plate by thermally conductive structural adhesive.

[0009] More preferably, a water inlet is provided on one side of the fixed end plate, and the water inlet is connected to the fixed end plate and the liquid cooling plate.

[0010] More preferably, the liquid cooling plate is provided with a limiting roller, and the limiting roller is in the shape of a cuboid.

[0011] More preferably, the spacing between the limiting rollers is consistent, and the shape of the limiting rollers is consistent.

[0012] More preferably, the sealing strip is symmetrically arranged with the liquid cooling plate as the center, and the sealing strip is inserted into the flow channel.

[0013] More preferably, the fixed end plate is hollow inside, and the liquid cooling plate is located in the middle of the fixed end plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] By adopting a double-layer cell arrangement, the vertical height of the cells is reduced, which facilitates temperature control of the battery during high-rate charging and discharging. This prevents the cell lifespan from being reduced due to excessive temperature differences and reduces the likelihood of false alarms caused by temperature data distortion. At the same time, the double-layer cell arrangement increases the number of cells in the battery module, improves energy density, and enhances practicality. Attached Figure Description

[0016] Figure 1 This is an overall structural diagram of a double-layer soft-pack liquid cooling module structure proposed in this utility model;

[0017] Figure 2 This is an exploded structural diagram of a double-layer soft-pack liquid-cooled module structure proposed in this utility model;

[0018] Figure 3 This is a schematic diagram of an explosion of a liquid cooling plate structure.

[0019] In the diagram: 1. Battery module; 2. Side plate; 3. Fixed end plate; 4. Water inlet; 5. Fixing plate; 6. Cell stack; 7. Thermal insulation foam; 8. Liquid cooling plate; 9. Flow channel; 10. Sealing strip; 11. Limiting roller. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figure 1-3 A double-layer soft-pack liquid-cooled module structure includes a battery module 1. The battery module 1 includes a side plate 2, which is disposed on both sides of the battery module 1. The side plate 2 can provide pre-tightening force for the lateral stack of battery cells 6, and can prevent the battery cells 6 from sliding out from the side of the battery module 1.

[0022] The battery module 1 is provided with fixing plates 5 at the top and bottom, and fixing end plates 3 at both ends. The fixing end plates 3 can provide pre-tightening force at the top and bottom of the cell stack 6, and can effectively fix the cell stack 6. The fixing end plates 3 and fixing plates 5 are fixed by laser welding, which can effectively improve the stability of the battery module 1.

[0023] A liquid cooling plate 8 is provided between the fixed end plates 3. The liquid cooling plate 8 can effectively dissipate heat from the battery cells. The top and bottom of the liquid cooling plate 8 are provided with battery cell stacks 6. By adopting a double-layer battery cell arrangement, the vertical height of the battery cells is reduced, which facilitates the temperature control of the battery during high-rate charging and discharging. The battery cell life will not be reduced due to excessive temperature difference, and the battery will not be prone to false alarms during use due to temperature distortion. At the same time, the number of battery cells in the battery module 1 is increased by the double-layer battery cell arrangement, the energy density is improved, and the practicality is strong.

[0024] The liquid cooling plate 8 has a flow channel 9 inside, and the cooling also flows through the flow channel 9. It can absorb the heat generated by the battery cell stack 6 for effective heat dissipation. The liquid cooling plate 8 has sealing strips 10 at both ends, which seal the flow channel 9 to prevent the cooling from leaking out of the flow channel 9. At the same time, it can be easily disassembled and the flow channel 9 can be easily cleaned.

[0025] A heat-insulating foam 7 is provided between the battery cell stack 6 and the fixing plate 5. The heat-insulating foam 7 is fixed to the battery cell stack 6 and the fixing plate 5 by thermally conductive structural adhesive. The heat-insulating foam 7 can isolate external heat and keep the battery cell stack 6 warm in cold environments. It can reduce the impact of external temperature difference on the battery cell stack 6 and improve the service life of the battery cell stack 6.

[0026] A water inlet 4 is provided on one side of the fixed end plate 3. The water inlet 4 is connected to the fixed end plate 3 and the liquid cooling plate 8. Coolant is injected into the liquid cooling plate 8 through the water inlet 4. At the same time, the water inlet 4 can be connected to an external coolant circulation device to realize the function of circulating the coolant in the liquid cooling plate 8.

[0027] The liquid cooling plate 8 is equipped with limiting rollers 11, which can limit the position of the battery cell stack 6. Some of the battery cells are placed inside the two limiting rollers 11, which can reduce the impact of the battery cells bulging during use. The limiting rollers 11 are cuboid in shape, which has good stability. The spacing between the limiting rollers 11 is consistent, and the shape of the limiting rollers 11 is consistent, which can further improve the stability of the battery cell stack 6.

[0028] The sealing strip 10 is symmetrically arranged around the liquid cooling plate 8, thereby improving the sealing performance of the sealing strip 10. The sealing strip 10 is inserted into the flow channel 9 and the joint is sealed with glue, which can further improve the sealing performance and prevent coolant leakage from causing short circuit and fire in the battery cell stack 6.

[0029] The fixed end plate 3 is hollow inside, which facilitates the flow of coolant into the liquid cooling plate 8. The liquid cooling plate 8 has the fixed end plate 3 in the middle position, which can improve stability.

Claims

1. A double-layer soft-pack liquid-cooled module structure, comprising a battery module, the battery module including side plates disposed on both sides of the battery module, fixing plates disposed at the top and bottom of the battery module, and fixing end plates disposed at both ends of the battery module, characterized in that, A liquid cooling plate is provided between the fixed end plates. A cell stack is provided at the top and bottom of the liquid cooling plate. A flow channel is provided inside the liquid cooling plate. Sealing strips are provided at both ends of the liquid cooling plate to seal the flow channel.

2. The double-layer soft-pack liquid-cooled module structure according to claim 1, characterized in that, Thermal insulation foam is provided between the battery cell stack and the fixing plate, and the thermal insulation foam is fixed to the battery cell stack and the fixing plate by thermally conductive structural adhesive.

3. The double-layer soft-pack liquid-cooled module structure according to claim 1, characterized in that, A water inlet is provided on one side of the fixed end plate, and the water inlet is connected to the fixed end plate and the liquid cooling plate.

4. The double-layer soft-pack liquid-cooled module structure according to claim 1, characterized in that, The liquid cooling plate is provided with a limiting roller, which is in the shape of a cuboid.

5. The double-layer soft-pack liquid-cooled module structure according to claim 4, characterized in that, The spacing between the limiting rollers is consistent, and the shape of the limiting rollers is consistent.

6. The double-layer soft-pack liquid-cooled module structure according to claim 1, characterized in that, The sealing strip is symmetrically arranged around the liquid cooling plate and is inserted into the flow channel.

7. The double-layer soft-pack liquid-cooled module structure according to claim 1, characterized in that, The fixed end plate is hollow inside, and the liquid cooling plate is located in the middle of the fixed end plate.

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