Filling heat conduction structure at bottom of battery pack module

Abstract

The utility model discloses a filling heat conduction structure at the bottom of a battery pack module, belongs to the technical field of accessory structures of power batteries on electric automobiles, and is used for solving the technical problem of poor adhesion of heat conduction pads in battery packs in the prior art. The utility model relates to a filling heat conduction structure at the bottom of a battery pack module, which is filled in a battery pack assembly. The lower box body is provided with a liquid cooling plate, the upper cover covers the upper part of the lower box body, a module is arranged in an inner cavity of the lower box body and is positioned above the liquid cooling plate, and the surface of the liquid cooling plate is filled with heat-conducting gel with a continuous path and is used for being in contact with the lower surface of the module. The battery can be protected when the battery is impacted or vibrated, spontaneous combustion or fusion of the battery cell and the electrode is avoided, and the stability and reliability of the battery pack are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of accessory structures of power batteries on electric vehicles, and particularly relates to a filling and heat-conducting structure at the bottom of a battery pack module. Background Art

[0002] At present, new energy vehicles are an important direction for the future development of vehicles. As the power source of new energy vehicles, most of the power battery packs use lithium-ion battery cells, which have advantages such as high energy density and long service life, but there are also relatively large potential safety hazards. During the normal driving process of an electric vehicle, when the temperature is too low, the overall vehicle cruising range will be significantly affected, and even the battery may not work properly; when the temperature is too high, the battery cells cannot work properly, affecting the operation of the battery and even the entire vehicle. At present, a heat-conducting pad is generally used as the heat-conducting material in terms of heat transfer. Its structure is that the heat-conducting pad is laid between the module and the liquid-cooling plate. Due to the cumulative dimensional tolerances of the module mounting surface of the box body and the surface of the liquid-cooling plate, the heat-conducting pad cannot compensate for the interface dimensional tolerances, and air bubbles are likely to occur during the laying of the heat-conducting pad, resulting in poor fitting between the bottom of the module and the liquid-cooling plate, causing too large a temperature difference during low-temperature heating, too long a heating time, and large heat energy loss. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the defects existing in the prior art, and provide a filling and heat-conducting structure at the bottom of a battery pack module that can solve the problem of poor fitting of the heat-conducting pad in the battery pack.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A filling and heat-conducting structure at the bottom of a battery pack module disclosed by the utility model is filled inside a battery pack assembly, and the battery pack assembly includes;

[0006] A lower box body with a liquid-cooling plate, and an upper cover covering the upper part of the lower box body. A module is installed above the liquid-cooling plate in the inner cavity of the lower box body. Among them, the surface of the liquid-cooling plate is filled with a heat-conducting gel with a continuous path for contacting the lower surface of the module.

[0007] Further, the continuous path of the heat-conducting gel extends continuously from one end of the battery to the other end in a folded-back manner along the width direction of the module battery.

[0008] Further, a gap is formed between the edge position of the liquid-cooling plate and the folded-back end of the continuous path.

[0009] Further, the form of the heat-conducting gel is paste-like.

[0010] Further, a sealing ring is installed at the top edge position of the lower box body, and is in sealing contact with the upper cover through the sealing ring.

[0011] Furthermore, the liquid cooling plate and the lower box body are of an integral structure.

[0012] In the above technical solution, for a filling and heat-conducting structure at the bottom of a battery pack module provided by the present utility model, the beneficial effects are as follows:

[0013] The present utility model designs a filling and heat-conducting structure at the bottom of a battery pack module, which uses heat-conducting gel to fill the gap between the module and the lower box body. By utilizing the deformation ability and filling ability of the heat-conducting gel, it can protect the battery when the battery is impacted or vibrated, avoid spontaneous combustion or melting of the battery core and electrodes, and enhance the stability and reliability of the battery pack; provide excellent heat-conducting performance and low thermal resistance, improve the efficiency of heat conduction, effectively transfer the heat generated inside the battery, help maintain the stability of the battery temperature, prevent the battery from overheating, thereby extending the battery life and improving the performance; its good durability, good heat resistance, cold resistance and aging resistance can maintain the original performance and life cycle under different temperature and climate conditions, and extend the service life of the battery pack; the most important characteristic is its non-adhesiveness, which plays a key role in battery pack maintenance, complete removal of the after-sales module, and reuse of the heat-conducting gel. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0015] Figure 1 is an overall structural schematic diagram of a filling and heat-conducting structure at the bottom of a battery pack module disclosed by the present utility model;

[0016] Figure 2 is a top view of a filling and heat-conducting structure at the bottom of a battery pack module disclosed by the present utility model, showing the heat-conducting gel attached to the surface of the lower box body.

[0017] Description of the Reference Numerals:

[0018] 1. Upper cover; 2. Sealing ring; 3. Module; 4. Liquid cooling plate; 5. Heat-conducting gel; 6. Lower box body. Detailed Embodiments

[0019] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0020] See Figure 1 as shown;

[0021] Utility model: A filling and heat-conducting structure at the bottom of a battery pack module, which is filled inside the battery pack assembly. The battery pack assembly includes a lower box body 6 with a liquid cooling plate 4 and an upper cover 1 covering the upper part of the lower box body 6. Inside the cavity of the lower box body, a module 3 is installed above the liquid cooling plate 4. Among them, a heat-conducting gel 5 with a continuous path is filled on the surface of the liquid cooling plate 4 for contacting the lower surface of the module 3. Specifically, the form of the heat-conducting gel 5 is paste-like;

[0022] See Figure 2 as shown:

[0023] Preferably, the continuous path of the heat-conducting gel 5 extends continuously from one end of the battery to the other end along the width direction of the module 3 battery in a folded-back manner.

[0024] Preferably, a gap is formed between the edge position of the liquid cooling plate 4 and the folded-back end of the continuous path. Through the gap, when the module 3 contacts the heat-conducting gel 5, squeezing the heat-conducting gel 5 can prevent the heat-conducting gel 5 from overflowing from the liquid cooling plate 4 when the module 3 is installed.

[0025] Preferably, the liquid cooling plate 4 and the lower box body 6 are of an integral structure, and a sealing ring 2 is installed at the top edge position of the lower box body 6 for sealing contact with the upper cover 1.

[0026] See Figure 2 as shown. In the above technical solution, for a filling and heat-conducting structure at the bottom of a battery pack module provided by the present utility model, when filling the heat-conducting gel 5, the colloid of the heat-conducting gel 5 is perpendicular to the internal battery cells of the module 3, and a continuous path is rhythmically and regularly formed by using an external glue application device and coated on the surface of the liquid cooling plate 4. The module 3 is placed on the heat-conducting gel 5. When the module 3 is bolted and tightened, the module 3 squeezes the heat-conducting gel 5, which plays a role in filling the gap between the module 3 and the lower box body 6. When the battery pack works, the heat-conducting gel serves as a heat conduction medium to transfer the heat inside the battery pack, and can also transfer heat to the module through the liquid cooling plate, ensuring the stable operation of the battery pack, thereby enhancing the service life and stability of the battery pack.

[0027] Only some exemplary embodiments of the present utility model are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. A filling and heat-conducting structure at the bottom of a battery pack module, which is filled inside the battery pack assembly, and is characterized in that The battery pack assembly includes: A lower box (6) having a liquid cooling plate (4) and an upper cover (1) covering the lower box (6); an inner cavity of the lower box (6) is located above the liquid cooling plate (4) and a module (3) is installed thereon; wherein the surface of the liquid cooling plate (4) is filled with a continuous path of heat-conducting gel (5) for contacting the lower surface of the module (3).

2. The filling and heat-conducting structure at the bottom of the battery pack module according to claim 1, It is characterized by: The continuous path of the thermally conductive gel (5) extends continuously from one end of the battery to the other end in a folded manner along the width direction of the battery of the module (3).

3. The filling and heat-conducting structure at the bottom of the battery pack module according to claim 2, characterized in that ； A gap is formed between the edge of the liquid cooling plate (4) and the return end of the continuous path.

4. The filling and heat-conducting structure at the bottom of the battery pack module according to claim 1, characterized in that ； The thermal conductive gel (5) is in the form of a paste.

5. A thermally conductive filling structure at the bottom of a battery pack module according to any one of claims 1 to 4, It is characterized by: A sealing ring (2) is installed at the top edge of the lower box body (6), and is in sealing contact with the upper cover (1) through the sealing ring (2).

6. A filling and heat-conducting structure at the bottom of a battery pack module according to any one of claims 1-4, characterized in that ； The liquid cooling plate (4) and the lower box (6) are an integrated structure.

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