Module structure for cooling pole piece

Abstract

The utility model belongs to the technical field of batteries, and discloses a module structure for cooling a pole piece, which comprises a box cover, a liquid cooling plate assembly, a heat-conducting glue layer, a battery cell module and a box body which are sequentially arranged from top to bottom. An independent cooling space is formed for each pole piece through the grid type design of the integrated cover plate, the space is filled with the multiple heat-conducting glue units, heat transfer is achieved, meanwhile, the heat is transferred to the top liquid cooling plate through contact between the pole pieces and heat-conducting glue, seamless connection is achieved, a heat dissipation channel is formed, and the heat dissipation efficiency is improved. And finally, cooling of the battery cell pole piece is achieved through top liquid cooling, the structure is obvious in heat dissipation effect, the heat dissipation requirement of the high-rate battery cell can be met, and the situation that the temperature rise of the pole piece is too high due to high-rate charging is effectively reduced. The heat transfer of the pole piece to the battery cell during high-rate charging is reduced, the risk of high temperature of the battery cell is reduced, and the service life of the battery cell is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of batteries, and in particular relates to a module structure for cooling a pole piece. Background Art

[0002] With the rapid development of new energy vehicles, the temperature environment of each battery cell in the battery pack throughout its life cycle is one of the most critical external factors affecting its lifespan. The current market demand for high-rate fast charging of battery cells is gradually increasing. Currently, the fast charging rate is mainly concentrated between 2C-4C, which will cause the electrode to overcurrent and generate a lot of heat. If cooling measures are not taken, the high-temperature electrode may transfer heat to the battery cell, causing the battery cell temperature to rise and create risks. Therefore, how to make each battery cell work in a suitable temperature environment has become a thermal management technology problem that technicians in this industry need to solve. Among various thermal management solutions, top liquid cooling and bottom immersion cooling solutions are very effective, but they are also more difficult. Utility Model Content

[0003] In view of the above problems, the present invention proposes a module structure for pole piece cooling, which includes a box cover, a liquid cooling plate assembly, a thermal conductive adhesive layer, a battery cell module and a box body arranged in sequence from top to bottom.

[0004] Furthermore, the battery cell module includes pole pieces, an integrated cover plate, battery cells, and end plates. The multiple battery cells are arranged sequentially in the length and width directions. The two end plates are arranged at both ends of the battery cell arrangement direction. The integrated cover plate is installed on one side of the multiple battery cells with poles, and the multiple pole pieces are installed on the other side of the integrated cover plate and are respectively connected to the poles on the multiple battery cells.

[0005] Furthermore, the integrated cover plate is in a grid shape, and the plurality of pole pieces are respectively integrated in the grids of the integrated cover plate, and each pole piece forms a separate cooling space.

[0006] Furthermore, the thermal conductive adhesive layer is composed of a plurality of thermal conductive adhesive units, and the plurality of thermal conductive adhesive units are in one-to-one contact with the plurality of electrode pieces respectively.

[0007] Furthermore, the battery cell module also includes a pole piece current input terminal and a pole piece current output terminal, the pole piece current input terminal and the pole piece current output terminal are located on the same side, the pole piece current input terminal is connected to the pole piece at one end, and the pole piece current output terminal is connected to the pole piece at the other end.

[0008] Furthermore, the liquid cooling plate assembly includes a liquid cooling plate, a liquid cooling plate water inlet and a liquid cooling plate water outlet. The liquid cooling plate is arranged on the top of the thermal conductive adhesive layer. The liquid cooling plate water inlet and the liquid cooling plate water outlet are arranged on the liquid cooling plate and are located on the same side. The liquid cooling plate water inlet and the liquid cooling plate water outlet are arranged at intervals.

[0009] Furthermore, a battery cell cooling module is provided between the battery cell module and the box body.

[0010] Furthermore, the battery cell cooling module includes an immersion coolant, and the immersion coolant is arranged between the battery cell module and the box.

[0011] Furthermore, the battery cell cooling module also includes a second liquid cooling plate assembly, and the liquid cooling plate is arranged between the battery cell module and the box.

[0012] Furthermore, the immersion coolant includes fluorinated liquid, hydrocarbons, lipids, silicone oils or water-based liquids.

[0013] Compared with the prior art, this application has the following beneficial effects:

[0014] This application proposes a module structure for electrode cooling. A separate cooling space is formed for each electrode through the grid design of the integrated cover plate. The space is filled with multiple thermal conductive adhesive units to achieve heat transfer. At the same time, the contact between the electrode and the thermal conductive adhesive is used to transfer heat to the top liquid cooling plate, achieving a seamless connection to form a heat dissipation channel. Finally, the top liquid cooling is used to cool the battery cell electrode. This structure has a significant heat dissipation effect and can meet the heat dissipation requirements of high-rate batteries. It effectively reduces the excessive temperature rise of the electrode caused by high-rate charging. It reduces the heat transfer from the electrode to the battery cell during high-rate charging, reduces the risk of high temperature in the battery cell, and extends the service life of the battery cell.

[0015] At the same time, the bottom of the battery module can be used with immersion coolant or a variety of cooling methods such as liquid cooling plates. This can achieve synchronous cooling of the top electrode and the battery cell, significantly reducing the temperature of the module and ensuring the temperature consistency of the battery cell. This module structure proves to be suitable for multiple cooling methods and can effectively achieve synchronous cooling of the top electrode and the battery cell, thereby reducing the temperature of the electrode during high-rate charging and reducing its impact on the battery cell.

[0016] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be achieved and obtained by the structures indicated in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 An exploded view of the module structure for cooling the pole piece in an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram of a battery cell module in an embodiment of the present invention is shown;

[0020] Figure 3 A schematic diagram of an integrated cover plate in an embodiment of the present utility model is shown;

[0021] Figure 4 A schematic diagram of an integrated cover plate coated with thermally conductive adhesive in an embodiment of the present invention is shown;

[0022] Figure 5 A schematic diagram showing the use of a battery cell module in conjunction with a top liquid cooling plate assembly in an embodiment of the present invention is shown;

[0023] Figure 6 A schematic diagram of dual cooling of the pole piece and the battery cell of the battery cell module in an embodiment of the present utility model is shown.

[0024] In the figure, 1. Box cover; 2. Liquid cooling plate assembly; 21. Liquid cooling plate; 22. Liquid cooling plate water inlet; 23. Liquid cooling plate water outlet; 3. Thermal conductive adhesive layer; 4. Battery cell module; 41. Pole piece; 42. Integrated cover plate; 43. Battery cell; 44. End plate; 45. Pole piece current input terminal; 46. Pole piece current output terminal; 5. Box body; 6. Battery cell cooling module. DETAILED DESCRIPTION

[0025] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0026] like Figure 1 As shown, a module structure for electrode cooling includes a box cover 1, a liquid cooling plate assembly 2, a thermal conductive adhesive layer 3, a battery cell module 4 and a box body 5 arranged in sequence from top to bottom.

[0027] The battery cell module 4 is placed at the bottom of the box body 5 and the box cover 1 is closed to form a complete battery pack. Since the battery pack will generate heat during use, the temperature environment of each battery cell 43 in the battery pack during its entire life cycle is one of the most critical external factors affecting its life. If cooling measures are not taken, the high-temperature electrode 41 may transfer heat to the battery cell 43, causing the temperature of the battery cell 43 to rise, thereby creating risks. Therefore, a cold liquid plate assembly 2 is set on the top of the battery cell module 4 to cool the battery cell module 4. In order to better transfer the heat of the battery cell module 4 to the cold liquid plate assembly 2, a thermal conductive adhesive layer 3 is set between the cold liquid plate assembly 2 and the battery cell module 4.

[0028] Therefore, the heat generated by the battery core module 4 during use is transferred to the liquid cooling plate assembly 2 through the thermal conductive adhesive layer 3 for cooling.

[0029] like Figure 2 As shown, the battery cell module 4 includes a pole piece 41, an integrated cover plate 42, a battery cell 43, and an end plate 44. The multiple battery cells 43 are arranged in sequence, and the two end plates 44 are arranged at both ends of the arrangement direction of the battery cells 43. The integrated cover plate 42 is installed on the side where the multiple battery cells 43 have poles, and the multiple pole pieces 41 are installed on the other side of the integrated cover plate 42 and are respectively connected to the poles on the multiple battery cells 43.

[0030] The multiple battery cells 43 are arranged sequentially in the length and width directions, and two end plates 44 are provided at both ends of the arrangement direction of the battery cells 43. The purpose of the end plates 44 is to make the arrangement of the multiple battery cells 43 more stable and fixed, and to effectively connect the multiple battery cells 43. The end plates 44 serve as an external protective layer for the battery cells 43, which can, to a certain extent, prevent the battery cells 43 from being damaged by external impact or extrusion, thereby improving the safety of the battery module. At the same time, the end plates 44 also have excellent heat dissipation properties, which can help the heat generated by the battery cells 43 during operation to be quickly dissipated, reducing the temperature of the battery cells 43, extending the service life of the battery cells 43, and reducing safety hazards caused by overheating. At the same time, it improves safety and optimizes space utilization, thereby improving the overall performance and reliability of the battery module.

[0031] A pole is embedded at one end of the battery cell 43 , one end is inside the battery cell 43 and electrically connected to the battery cell 43 , and the other end is connected to the pole piece 41 by welding or other means, thereby forming the positive and negative poles of the battery.

[0032] The primary function of the battery cell 43 is to convert chemical energy into electrical energy (discharging) or vice versa. The electrode 41 and battery cell 43 are tightly connected together through a specific connection method, forming the core of the battery. They each play a different role and function, and together they determine the battery's performance and reliability.

[0033] Multiple pole pieces 41 are integrated on the integrated cover plate 42, and the multiple pole pieces 41 are connected to the poles on the battery cells 43. The poles realize the electrical connection between the internal and external circuits of the battery through the connection with the battery cells 43 and the pole pieces 41, thereby ensuring the normal operation of the battery.

[0034] like Figure 3 As shown, the battery cell module 4 also includes a pole piece current input terminal 45 and a pole piece current output terminal 46, and the pole piece current input terminal 45 and the pole piece current output terminal 46 are located on the same side, the pole piece current input terminal 45 is connected to the pole piece 41 at one end, and the pole piece current output terminal 46 is connected to the pole piece 41 at the other end.

[0035] The electrode current input terminal 45 is the entrance for the battery module to receive external electrical energy. When the battery module 4 is connected to an external power source or charging device, electrical energy enters the battery module 4 through the electrode current input terminal 45, providing the battery module 4 with the electrical energy required for charging.

[0036] Inside the battery module 4, the electric energy received by the electrode current input terminal 45 is distributed to each battery cell 43 through internal conductive connectors (such as conductive sheets, copper busbars, etc.). In this process, the electrode current input terminal 45 plays a key role in electric energy distribution, ensuring that each battery cell 43 receives the appropriate amount of electric energy for charging.

[0037] In some intelligent battery management systems, the electrode current input terminal 45 also performs signal transmission. For example, when the battery module 4 establishes communication with an external charging device, the electrode current input terminal 45 can transmit battery status information (such as battery level, voltage, temperature, etc.) to the charging device, allowing the charging device to adjust the charging strategy based on the actual battery condition.

[0038] The electrode current output terminal 46 is the outlet for the battery module 4 to provide electric energy to external equipment. When the battery module 4 is connected to an external electrical device, the electric energy stored in the battery module 4 flows out of the battery module 4 through the electrode current output terminal 46 to provide the required electric energy for the external equipment.

[0039] During the discharge process of the battery module 4, the electrode current output terminal 46 controls the magnitude and direction of the current to ensure that the battery module 4 can stably and safely power external devices. During this process, the electrode current output terminal 46 needs to work closely with the battery management system (BMS) to dynamically adjust the current output based on the power demand of the external device and the actual condition of the battery module.

[0040] At the same time, the electrode current output terminal 46 also has some protection functions. For example, when the battery module 4 has an abnormal situation such as overcurrent or short circuit, the electrode current output terminal 46 can quickly cut off the current output to prevent the battery module 4 from being damaged or causing a safety accident.

[0041] like Figure 4 As shown, the integrated cover plate 42 is in a grid shape, and the plurality of pole pieces 41 are respectively integrated in the grids of the integrated cover plate 42 , and each pole piece 41 forms a separate cooling space.

[0042] Forming each pole piece 41 into a separate cooling space can achieve a better cooling effect.

[0043] The thermal conductive adhesive layer 3 is composed of a plurality of thermal conductive adhesive units, and the plurality of thermal conductive adhesive units are in one-to-one contact with the plurality of electrode pieces 41 .

[0044] Since each pole piece 41 has a separate cooling space, in order to better transfer the heat generated by each pole piece 41 to the cold liquid plate assembly 2, a thermal conductive adhesive unit is set on the top of each pole piece 41, which can achieve better heat transfer and can achieve cooling quickly and efficiently.

[0045] like Figure 5 As shown, the liquid cooling plate assembly 2 includes a liquid cooling plate 21, a liquid cooling plate water inlet 22 and a liquid cooling plate water outlet 23. The liquid cooling plate 21 is arranged on the top of the thermal conductive adhesive layer 3, and the liquid cooling plate water inlet 22 and the liquid cooling plate water outlet 23 are arranged on the liquid cooling plate 21 and are located on the same side. The liquid cooling plate water inlet 22 and the liquid cooling plate water outlet 23 are arranged at intervals.

[0046] The liquid cooling plate water inlet 22 is the entrance for the coolant to enter the liquid cooling system. The coolant is introduced into the liquid cooling plate 21 and begins its circulation process. This step is the basis for the liquid cooling system to achieve its heat dissipation function.

[0047] The cooling plate outlet 23 is where the coolant is discharged from the interior of the cooling plate 21. As the coolant flows through the cooling plate 21, it absorbs and removes heat. By the time the coolant is discharged from the cooling plate outlet 23, it has already removed the absorbed heat, achieving heat dissipation.

[0048] like Figure 6 As shown, a cell cooling module 6 is provided between the cell module 4 and the box 5 .

[0049] In order to achieve a better cooling effect for the battery cell module 4, in addition to cooling the electrode 41 at the top of the battery cell module 4, the battery cell 43 at the bottom of the battery cell module 4 can also be cooled, and double cooling can be achieved at the same time to achieve a better cooling effect.

[0050] The battery cell cooling module 6 includes an immersion coolant, and the immersion coolant is arranged between the battery cell module 4 and the box 5 .

[0051] The battery cell cooling module 6 also includes a second liquid cooling plate assembly, which is arranged between the battery cell module 4 and the box 5

[0052] The top electrode 41 of the battery cell module 4 can be cooled by the cold liquid plate assembly 2, and the battery cell 43 at the bottom of the battery cell module 4 can be cooled by setting an immersion coolant or setting a second liquid cooling plate assembly, which can effectively achieve synchronous cooling of the top electrode 41 and the battery cell 43, thereby reducing the temperature of the electrode 41 during high-rate charging and reducing its impact on the battery cell 43.

[0053] The immersion cooling liquid includes fluorinated liquid, hydrocarbon, grease, silicone oil or water-based liquid.

[0054] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A module structure for cooling a pole piece, characterized by: It comprises a box cover (1), a liquid cooling plate assembly (2), a thermal conductive adhesive layer (3), a battery module (4) and a box body (5) which are arranged in sequence from top to bottom; The battery module (4) comprises a pole piece (41), an integrated cover plate (42), a battery cell (43), and an end plate (44); a plurality of the battery cells (43) are sequentially arranged in the length direction and the width direction; two end plates (44) are arranged at both ends of the battery cell (43) arrangement direction; the integrated cover plate (42) is installed on one side of the plurality of battery cells (43) having poles; and a plurality of pole pieces (41) are installed on the other side of the integrated cover plate (42) and are respectively connected to the poles on the plurality of battery cells (43); The integrated cover plate (42) is in a grid shape, and the plurality of pole pieces (41) are respectively integrated in the grids of the integrated cover plate (42), with each pole piece (41) forming a separate cooling space.

2. The pole piece cooling module structure according to claim 1, characterized in that: The thermal conductive adhesive layer (3) is composed of a plurality of thermal conductive adhesive units, and the plurality of thermal conductive adhesive units are in one-to-one contact with the plurality of pole pieces (41).

3. The pole piece cooling module structure according to claim 1, characterized in that: The battery core module (4) further comprises a pole piece current input terminal (45) and a pole piece current output terminal (46), wherein the pole piece current input terminal (45) and the pole piece current output terminal (46) are located on the same side, the pole piece current input terminal (45) is connected to the pole piece (41) at one end, and the pole piece current output terminal (46) is connected to the pole piece (41) at the other end.

4. The pole piece cooling module structure according to claim 1, characterized in that: The liquid cooling plate assembly (2) comprises a liquid cooling plate (21), a liquid cooling plate water inlet (22) and a liquid cooling plate water outlet (23); the liquid cooling plate (21) is arranged on the top of the thermal conductive adhesive layer (3); the liquid cooling plate water inlet (22) and the liquid cooling plate water outlet (23) are arranged on the liquid cooling plate (21) and are located on the same side; the liquid cooling plate water inlet (22) and the liquid cooling plate water outlet (23) are arranged at intervals.

5. The pole piece cooling module structure according to claim 1, characterized in that: A battery core cooling module (6) is provided between the battery core module (4) and the box (5).

6. The pole piece cooling module structure according to claim 5, characterized in that: The battery core cooling module (6) comprises an immersion-type cooling liquid, and the immersion-type cooling liquid is arranged between the battery core module (4) and the box (5).

7. The pole piece cooling module structure according to claim 5, characterized in that: The battery core cooling module (6) further comprises a second liquid cooling plate assembly, wherein the liquid cooling plate is arranged between the battery core module (4) and the box (5).

8. The pole piece cooling module structure according to claim 6, characterized in that: The immersion cooling liquid includes fluorinated liquid, hydrocarbon, grease, silicone oil or water-based liquid.

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