Multi-surface liquid-cooled battery module structure

Abstract

The utility model discloses a multi-surface liquid-cooled battery module structure which comprises a plurality of single battery cells arranged side by side left and right and a bottom liquid-cooled plate arranged at the bottoms of the single battery cells, and a vertical liquid-cooled plate is arranged between every two adjacent single battery cells. According to the utility model, through the parallel design of bottom liquid cooling and large-surface liquid cooling, the bottom liquid cooling plate and the vertical liquid cooling plate are used for simultaneously carrying out bottom liquid cooling and large-surface liquid cooling on the battery cell, compared with the traditional scheme, the rapid cooling of the battery cell can be completed, the temperature of the battery cell can be rapidly reduced to 25-35 DEG C, the refrigeration speed and efficiency are high, and the liquid cooling effect is greatly improved. The liquid cooling effect of a battery cell with a long size in the width direction is improved more obviously, the temperature rise of the battery cell can be controlled at a lower level, so that the battery cell is always in a comfortable temperature range, the service life of the battery cell can be prolonged, the potential safety hazard is reduced, and the heat dissipation requirement of the high-capacity and high-rate battery cell can be met; and the problem of overlarge heating value under the high-power working condition is solved.

Description

Technical Field

[0001] This utility model relates to the field of lithium-ion battery manufacturing technology, and in particular to a multi-faceted liquid-cooled battery module structure. Background Technology

[0002] With the rapid development of energy storage technology, the capacity of individual battery cells is increasing, and the heat generation is also increasing, making the requirements for thermal management more and more stringent. Common liquid cooling methods on the market include bottom liquid cooling, large-area liquid cooling, bottom liquid cooling + top liquid cooling, and bottom liquid cooling + side liquid cooling, with bottom liquid cooling being the most common. This liquid cooling method is easy to manufacture and the technology is relatively mature; however, it is limited by the heat dissipation area, and there is an upper limit to the heat dissipation of the battery cell, which cannot meet the heat dissipation requirements of large-capacity, high-rate battery cells.

[0003] Bottom liquid cooling has a small heat dissipation area, and its heat removal capacity is limited.

[0004] Currently, the demand in the frequency modulation market is increasing, requiring large-capacity battery cells while also maintaining high charging and discharging rates. Generally, 1P and 2P charging and discharging power are the main types. High charging and discharging rates bring higher heat generation. When combined with large-capacity battery cells, the heat generation of the system increases even more significantly, and ordinary heat dissipation methods can no longer meet the requirements. Utility Model Content

[0005] This utility model provides a multi-faceted liquid-cooled battery module structure that can meet the heat dissipation requirements of large-capacity, high-rate battery cells to solve the technical problems existing in the prior art.

[0006] The technical solution adopted by this utility model to solve the technical problems existing in the prior art is: a multi-faceted liquid-cooled battery module structure, including multiple individual battery cells arranged side by side and a bottom liquid-cooled plate arranged at their bottom, with a vertical liquid-cooled plate between two adjacent individual battery cells.

[0007] All the vertical liquid cooling plates have their inlets connected in parallel to the inlet-side water collection pipe and their outlets connected in parallel to the return-side water collection pipe. The inlet of the inlet-side water collection pipe and the inlet of the bottom liquid cooling plate are connected to the structural water inlet through an inlet-outlet water divider. The outlet of the return-side water collection pipe and the outlet of the bottom liquid cooling plate are connected to the structural return-side water inlet through a return-side water collector.

[0008] The inlet water divider is composed of an inlet water diversion channel, and the return water collector is composed of an outlet water collection channel. The inlet water diversion channel and the outlet water collection channel are arranged inside the water distribution plate, which is vertically arranged at one end of the module structure.

[0009] The water distribution plate has an inlet end and a return end. The inlet end has an internal water inlet channel with one inlet and two outlets. The inlet of the water inlet channel is connected to the structural inlet, which is connected to the outside of the water distribution plate. The two outlets of the water inlet channel are arranged vertically. An upper outlet interface is connected to the upper outlet of the water inlet channel, and this upper outlet interface is connected to the inlet of the water inlet-side collection pipe via pipe I. The lower outlet of the water inlet channel is connected to the bottom liquid cooling plate. The inlet of the water collection channel is connected to the outlet of the water collection channel. The outlet of the water collection channel has one outlet and two inlets. The outlet of the outlet of the water collection channel is connected to the structural return water inlet. The structural return water inlet is connected to the outside of the water distribution plate. The two inlets of the outlet of the water collection channel are arranged vertically. An upper return water inlet is connected to the upper inlet of the outlet of the water collection channel. The upper return water inlet is connected to the outlet of the return water side collection pipe through pipe II. The lower inlet of the outlet of the water collection channel is connected to the outlet of the bottom liquid cooling plate.

[0010] The water distribution plate, the bottom liquid cooling plate, the inlet water collection pipe, and the return water collection pipe are connected by friction stir welding.

[0011] The outlet of the inlet-side water collection pipe is connected to the inlet of the vertical liquid cooling plate via pipe III; the inlet of the return-side water collection pipe is connected to the outlet of the vertical liquid cooling plate via pipe IV.

[0012] The advantages and positive effects of this invention are as follows: Through a parallel design of bottom liquid cooling and large-area liquid cooling, the bottom and vertical liquid cooling plates simultaneously cool the battery cell. Compared to traditional solutions, this allows for rapid cooling of the battery cell, quickly reducing its temperature to the range of 25-35°C. The cooling speed is fast, the efficiency is high, and the liquid cooling effect is significantly improved. For battery cells with a longer width, the improvement in liquid cooling effect is even more significant, keeping the cell temperature rise at a low level and ensuring the cell remains within a comfortable temperature range. This extends the battery cell's lifespan, reduces safety hazards, meets the heat dissipation requirements of large-capacity, high-rate battery cells, and solves the problem of excessive heat generation under high-power conditions. By using a water distribution plate for flow diversion, two parallel loops can be connected, solving the problems of excessively long single-loop flow channels, pressure drop, and flow resistance. It also saves costs, requiring only one inlet and inlet diversion channel to achieve two-way water intake functionality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2This is a schematic diagram of the water distribution plate structure of this utility model;

[0015] Figure 3 This is a schematic diagram of the bottom liquid cooling plate structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the vertical liquid cooling plate structure of this utility model.

[0017] In the diagram: 1. Water distribution plate; 1-1. Structural water inlet; 1-2. Water inlet distribution channel; 1-3. Upper water outlet; 1-4. Water inlet of the bottom liquid cooling plate; 1-5. Structural water return outlet; 1-6. Water outlet collection channel; 1-7. Upper water return inlet; 1-8. Water outlet of the bottom liquid cooling plate; 2. Bottom liquid cooling plate; 3. Vertical liquid cooling plate; 3-1. Water inlet of the vertical liquid cooling plate; 3-2. Water outlet of the vertical liquid cooling plate; 3-3. Flow channel of the vertical liquid cooling plate; 4. Water inlet side collection pipe; 5. Water return side collection pipe; 6. Pipe I; 7. Pipe III; 8. Pipe IV; 9. Pipe II; 10. Individual battery cell. Detailed Implementation

[0018] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided, and detailed descriptions are given below in conjunction with the accompanying drawings:

[0019] Please see Figures 1-4 A multi-faceted liquid-cooled battery module structure includes multiple individual battery cells 10 arranged side by side and a bottom liquid-cooled plate 2 disposed at their bottom, with a vertical liquid-cooled plate 3 disposed between two adjacent individual battery cells 10.

[0020] The main function of the bottom liquid cooling plate is to complete the liquid cooling cycle at the bottom of the cell, while the main function of the vertical liquid cooling plate is to complete the liquid cooling cycle on the large surface of the cell. By simultaneously performing bottom liquid cooling and large surface liquid cooling on the cell through the bottom liquid cooling plate and the vertical liquid cooling plate, the problem of excessive heat generation under high power conditions can be solved, allowing the cell to operate in a comfortable temperature range and extending the cell's service life.

[0021] The more preferred solution in this embodiment is as follows:

[0022] All the vertical liquid cooling plates 3 have their inlets connected in parallel to the inlet-side water collection pipe 4 and their outlets connected in parallel to the return-side water collection pipe 5. The inlet of the inlet of the inlet-side water collection pipe 4 and the inlet of the bottom liquid cooling plate 2 are connected to the structural inlet 1-1 through an inlet-outlet water divider. The outlet of the return-side water collection pipe 5 and the outlet of the bottom liquid cooling plate 2 are connected to the structural return outlet 1-5 through a return-side water collector.

[0023] The bottom liquid cooling, the large-area liquid cooling, and the internal parallel structure of the large-area liquid cooling system can achieve rapid cooling of the battery cell, quickly reducing the cell temperature to the range of 25-35℃. The cooling speed is fast and the efficiency is high.

[0024] The inlet water divider is composed of inlet water diversion channels 1-2, and the return water collector is composed of outlet water collection channels 1-6. The inlet water diversion channels 1-2 and the outlet water collection channels 1-6 are arranged inside the water distribution plate 1. The water distribution plate 1 is vertically arranged at one end of the module structure, and the structure is compact and stable.

[0025] The water distribution plate 1 is provided with an inlet end and a return end. The inlet end is provided with an inlet water diversion channel 1-2 inside. The inlet water diversion channel 1-2 has one inlet and two outlets. The inlet of the inlet water diversion channel 1-2 is connected to the structural inlet 1-1. The structural inlet 1-1 is connected to the outside of the water distribution plate 1. The two outlets of the inlet water diversion channel 1-2 are arranged vertically. An upper outlet interface 1-3 is connected to the upper outlet of the inlet water diversion channel. The upper outlet interface 1-3 is connected to the inlet of the water collection pipe 4 on the inlet side through pipe I6. The lower outlet of the inlet water diversion channel is connected to the inlet 1-4 of the bottom liquid cooling plate.

[0026] The return water end is internally provided with the outlet water collection channel 1-6. The outlet water collection channel 1-6 has one outlet and two inlets. The outlet of the outlet water collection channel 1-6 is connected to the structural return water inlet 1-5. The structural return water inlet 1-5 is connected to the outside of the water distribution plate 1. The two inlets of the outlet water collection channel 1-6 are arranged vertically. An upper return water inlet 1-7 is connected to the upper inlet of the outlet water collection channel 1-6. The upper return water inlet 1-7 is connected to the outlet of the return water side collection pipe 5 through pipe II 9. The lower inlet of the outlet water collection channel 1-6 is connected to the outlet 1-8 of the bottom liquid cooling plate 2. The channel arrangement is reasonable and convenient for installation and maintenance.

[0027] The water distribution plate 1, the bottom liquid cooling plate 2, the inlet water collection pipe 4, and the return water collection pipe 5 are connected by friction stir welding, which can ensure both overall strength and the sealing of the flow channel, thus avoiding safety hazards caused by leakage.

[0028] The outlet of the water inlet side collection pipe 4 is connected to the water inlet 3-1 of the vertical liquid cooling plate through pipe III7; the inlet of the water return side collection pipe 5 is connected to the water outlet 3-2 of the vertical liquid cooling plate through pipe IV8. A flow channel 3-3 of the vertical liquid cooling plate is provided in the vertical liquid cooling plate 3. The structure is simple and the arrangement is reasonable.

[0029] Please see Figure 1 , Figure 1 This is just a schematic diagram of a single module structure. Liquid cooling of multiple modules can be achieved by adding water collection pipes and branch lines.

[0030] The working principle of this utility model:

[0031] The water distribution plate can realize the functions of splitting the inlet water into two and combining the return water into one, ensuring that the two circulations operate independently in parallel, and avoiding the impact on the consistency of temperature rise caused by excessive pressure drop and flow resistance due to the excessive circulation path of a single loop.

[0032] Bottom liquid cooling: Its main function is to cool the bottom of the battery cell. The coolant enters the bottom liquid cooling plate through the inlet and returns to the outlet manifold through the outlet to complete the entire circulation.

[0033] Large-area liquid cooling circulation of battery cells: Coolant flows into inlet pipe I from the upper outlet, then into the inlet-side collection pipe, and enters multiple vertical liquid cooling plates through parallel multi-pipe III. It flows through the flow channels of the vertical liquid cooling plates, flows out from the outlet of the vertical liquid cooling plates, and converges into the outlet-side collection pipe. Then it flows into the outlet collection channel through the upper return water inlets 1-7, completing the large-area liquid cooling circulation of battery cells.

[0034] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and these all fall within the protection scope of the present invention.

Claims

1. A multi-sided liquid-cooled battery module structure, characterized by, The module structure comprises a plurality of single battery cells arranged side by side and a bottom liquid cooling plate arranged at the bottom of the single battery cells, and a vertical liquid cooling plate is arranged between adjacent single battery cells. All the vertical liquid cooling plates are connected in parallel to the water inlet side water collecting pipe through the water inlet, and connected in parallel to the water return side water collecting pipe through the water outlet.

2. The multi-sided liquid-cooled battery module structure of claim 1, wherein, The water inlet distributor is composed of a water inlet shunt flow channel, and the water return collector is composed of a water outlet collecting flow channel.

3. The multi-sided liquid-cooled battery module structure of claim 2, wherein, The water inlet shunt flow channel and the water outlet collecting flow channel are arranged in a water distribution plate which is vertically arranged at one end of the module structure.

4. The multi-sided liquid-cooled battery module structure of claim 3, wherein, The water distribution plate is provided with a water inlet end and a water return end.

5. The multi-sided liquid-cooled battery module structure of claim 3, wherein, The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. The water distribution plate is provided with a water inlet end and a water return end. 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