Lithium battery heating device for new energy automobile under high-voltage platform

Abstract

The utility model relates to a lithium battery heating device of a new energy automobile under a high-voltage platform, and aims to provide an efficient and safe thermal management solution. The device comprises heating devices on the two sides of the lithium battery pack, each heating device is composed of a heat conduction shell, symmetrically-distributed heating plates, a buffer plate and a heating assembly, at least one heating element is arranged in each heating assembly, and each heating assembly is connected with a battery management system through a wire, receives a control signal and adjusts the heating power. A protective shell and an insulating plate are arranged outside the heating device, heat dissipation pipelines are distributed on the insulating plate, and cooling liquid circulates in the insulating plate to absorb redundant heat. The buffer plate is made of an elastic material, absorbs thermal expansion and prevents mechanical stress on the battery pack. And the fixed connecting piece comprises a fixed bracket and a fastener, so that the heating device is convenient to maintain and replace. The battery management system automatically adjusts the working state of the heating element according to data of the temperature sensor, and intelligent temperature control is achieved.

Description

Technical Field

[0001] This utility model provides a lithium battery heating device, belonging to the field of new energy vehicle technology, and particularly relates to a lithium battery heating device under the high voltage platform of new energy vehicles. Background Technology

[0002] Lithium batteries in high-voltage platforms for new energy vehicles refer to lithium-ion batteries used in high-voltage electrical architectures. These batteries have a higher voltage platform, enabling them to provide greater power output and longer driving range, while also supporting faster charging speeds to meet the application scenarios of modern new energy vehicles that require high energy density and high power.

[0003] In existing new energy vehicles, lithium batteries experience slower charging speeds during winter or in low temperatures. This is because low temperatures cause the electrolyte inside the battery to become viscous, slowing the movement of lithium ions and resulting in performance degradation, reduced charge and discharge capacity, and consequently, decreased driving range. Furthermore, low temperatures degrade the kinetic performance of the positive and negative electrodes, increasing electrolyte viscosity, decreasing conductivity, and reducing the migration activity of lithium ions between the electrodes. Using high-current charging under these conditions can lead to a large accumulation of lithium atoms on the negative electrode surface, causing lithium dendrites to precipitate. This not only results in battery capacity loss and performance degradation but can also, in severe cases, puncture the separator, leading to a safety accident. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this application provides a lithium battery heating device under the high voltage platform of new energy vehicles, which solves the problems of low charging efficiency and poor discharge performance of lithium batteries in low temperature environments.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a lithium battery heating device under a high-voltage platform for new energy vehicles, including a lithium battery pack, heating devices are provided on both sides of the lithium battery pack, the heating device includes a heat-conducting shell, symmetrically distributed heating plates are provided inside the heat-conducting shell, the heating plate is connected to the heating component through a buffer plate, and the heating device is covered with a protective shell corresponding to itself.

[0006] Preferably, the protective shell has an insulating plate on the side near the heating device, and the insulating plate has several evenly distributed heat dissipation pipes.

[0007] Preferably, the lithium battery pack has corresponding fixing connectors on both sides, which are also connected to the heat-conducting outer shell.

[0008] Preferably, the heating assembly includes at least one heating element, which is connected to the battery management system via wires to receive control signals and adjust the heating power.

[0009] Preferably, the heat dissipation pipe contains coolant, which absorbs and removes excess heat during the heating process, keeping the temperature of the heating device within a safe range.

[0010] Preferably, the fixing connector includes a fixing bracket and a fastener. The fixing bracket matches the outer casing of the lithium battery pack, and the fastener is used to tightly fix the heat-conducting outer casing to the fixing bracket.

[0011] Preferably, the buffer plate is made of an elastic material to absorb the thermal expansion generated during the heating process and prevent mechanical stress on the lithium battery pack.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0013] This invention effectively solves the problems of low charging efficiency and poor discharge performance of lithium batteries in low-temperature environments by installing heating devices on both sides of the lithium battery pack under the high-voltage platform of new energy vehicles. The heating device consists of a heat-conducting outer shell with symmetrically distributed heating plates inside. These heating plates are connected to the heating assembly through an inner buffer plate. After receiving control signals from the battery management system, the heating assembly can adjust the heating power to uniformly heat the lithium battery pack. This design not only improves heating efficiency but also absorbs thermal expansion through the use of buffer plates, reducing mechanical stress on the lithium battery pack and protecting it from damage caused by low temperatures. Simultaneously, the outer protective shell of the heating device provides additional protection, ensuring the stability and safety of the heating device.

[0014] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of a lithium battery heating device under a high-voltage platform for new energy vehicles according to the present invention.

[0016] Figure 2 This is an exploded view of a lithium battery heating device under a high-voltage platform for new energy vehicles according to this utility model.

[0017] Figure 3 This is an exploded view of the heating device of a lithium battery heating device under a high-voltage platform for new energy vehicles according to this utility model.

[0018] Figure 4 This is a three-dimensional schematic diagram of the heating component of a lithium battery heating device under a high-voltage platform for new energy vehicles according to this utility model.

[0019] As shown in the figure:

[0020] 1. Lithium battery pack;

[0021] 11. Protective casing; 12. Insulating board; 13. Heat dissipation pipes; 14. Fixing connectors;

[0022] 141. Fixed bracket; 142. Fastener;

[0023] 2. Heating device;

[0024] 21. Heat-conducting outer shell; 22. Heating plate; 23. Buffer plate; 24. Heating component. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] like Figure 1 and Figure 2As shown, a lithium battery heating device for a high-voltage platform in a new energy vehicle includes a lithium battery pack 1. Heating devices 2 are located on both sides of the lithium battery pack 1. Each heating device 2 includes a heat-conducting outer shell 21. Symmetrically distributed heating plates 22 are located inside the heat-conducting outer shell 21. A heating assembly 24 is connected to the inner side of the heating plates 22 via a buffer plate 23. The heating assembly 24 includes at least one heating element, which is connected to a battery management system via wires to receive control signals and adjust the heating power. A protective shell 11 is fitted around the heating device 2. An insulating plate 12 is located on the side of the protective shell 11 closest to the heating device 2. Several evenly distributed heat dissipation pipes 13 are provided on the insulating plate 12. Coolant flows inside the heat dissipation pipes 13 to absorb and remove excess heat during heating, maintaining the temperature of the heating device 2 within a safe range. The buffer plate 23 is made of an elastic material to absorb thermal expansion during heating, preventing mechanical stress on the lithium battery pack 1.

[0029] In this embodiment, the design of the heating device 2 fully considers the thermal management requirements of the lithium battery pack 1 under different temperature conditions. By setting the heating device 2 on both sides of the lithium battery pack 1, it is possible to ensure that the battery pack heats up quickly in low-temperature environments, improving its charging efficiency and discharge performance. The heat-conducting shell 21 not only protects the internal components but also helps to distribute heat evenly, making heating more efficient. The symmetrical distribution design of the heating plate 22 ensures that heat can be evenly transferred to every part of the lithium battery pack 1 during the heating process, avoiding problems such as local overheating or uneven heating. The heating elements inside the heating assembly 24 can precisely adjust the heating power according to the instructions of the battery management system, achieving precise temperature control of the lithium battery pack 1. The protective shell 11 and the insulating plate 12 provide additional physical protection and electrical isolation for the heating device 2, ensuring the safety and reliability of the entire system. The coolant circulation in the heat dissipation pipe 13 helps to remove excess heat in time during the heating process, preventing the heating device 2 from overheating, and also helps to cool the lithium battery pack 1 in high-temperature environments, further ensuring the thermal stability and service life of the battery pack. The use of buffer plate 23 effectively mitigates the impact of thermal expansion that may occur during the heating process on lithium battery pack 1, reduces mechanical stress, and protects the structural integrity of the battery pack.

[0030] like Figure 3 and Figure 4As shown, the lithium battery pack 1 has corresponding fixing connectors 14 on both sides, which are also connected to the heat-conducting outer shell 21. Each fixing connector 14 includes a fixing bracket 141 and a fastener 142. The fixing bracket 141 matches the outer shell of the lithium battery pack 1, and the fastener 142 securely fixes the heat-conducting outer shell 21 to the fixing bracket 141. The fixing connector 14 is designed for quick disassembly, facilitating the maintenance and replacement of the heating device 2. The battery management system can automatically adjust the operating state of the heating element based on the temperature data fed back by the temperature sensor of the lithium battery pack 1, achieving intelligent temperature control.

[0031] In this embodiment, the design of the fixing connector 14 further enhances the tightness and stability between the lithium battery pack 1 and the heating device 2. By matching the fixing bracket 141 with the outer casing of the lithium battery pack 1, it ensures that the heating device 2 can be securely installed on both sides of the battery pack. Simultaneously, the fastener 142 makes the connection between the heat-conducting outer casing 21 and the fixing bracket 141 even tighter, effectively preventing loosening or displacement problems that may occur during heating. The quick-release structure of the fixing connector 14 greatly facilitates the daily maintenance and replacement of the heating device 2, improving the maintainability and service life of the system.

[0032] In use, under the high-voltage platform of new energy vehicles, a high-efficiency lithium battery heating device is designed to meet the thermal management requirements of lithium battery packs under different temperature conditions. This device includes a lithium battery pack 1 and heating devices 2 on both sides. The heating device 2 consists of a heat-conducting outer shell 21, with symmetrically distributed heating plates 22 inside. The inner side of the heating plates 22 is connected to a heating assembly 24 via a buffer plate 23. The heating assembly 24 contains at least one heating element, which is connected to the battery management system via wires, enabling it to receive control signals and adjust the heating power as needed. A protective shell 11 covers the heating device 2, and an insulating plate 12 is located near the heating device 2. Heat dissipation pipes 13 are evenly distributed on the insulating plate 12, through which coolant flows. These pipes absorb and remove excess heat during heating, ensuring the temperature of the heating device 2 remains within a safe range. Simultaneously, the buffer plate 23 is made of an elastic material to absorb thermal expansion during heating, preventing mechanical stress on the lithium battery pack 1. By installing heating devices 2 on both sides of the lithium battery pack 1, rapid heating of the battery pack can be ensured in low-temperature environments, improving charging efficiency and discharge performance. The heat-conducting outer shell 21 not only protects the internal components but also helps to distribute heat evenly, improving heating efficiency. The symmetrical distribution design of the heating plates 22 ensures that heat can be evenly transferred to every part of the lithium battery pack 1, avoiding local overheating or uneven heating. At the same time, the heating elements inside the heating assembly 24 can precisely adjust the heating power according to the instructions of the battery management system, achieving precise temperature control of the lithium battery pack 1. The protective shell 11 and the insulating plate 12 provide additional physical protection and electrical isolation for the heating devices 2, ensuring the safety and reliability of the system. The coolant circulation in the heat dissipation pipe 13 not only helps to prevent the heating devices 2 from overheating but also helps to cool the lithium battery pack 1 in high-temperature environments, further ensuring the thermal stability and service life of the battery pack. Furthermore, fixed connectors 14 are connected to both sides of the lithium battery pack 1. Each fixed connector 14 includes a fixed bracket 141 and a fastener 142. The fixed bracket 141 matches the outer shell of the lithium battery pack 1, and the fastener 142 securely fixes the heat-conducting outer shell 21 to the fixed bracket 141. The fixed connector 14 is designed for quick disassembly, facilitating the maintenance and replacement of the heating device 2, thus improving the maintainability and lifespan of the system. The battery management system can automatically adjust the operating state of the heating element based on the temperature data fed back by the temperature sensor of the lithium battery pack 1, achieving intelligent temperature control. This further enhances the system's adaptability to extreme environments, ensuring that the lithium battery pack is always within its optimal operating temperature range, improving the overall performance of the new energy vehicle, and reducing the risk of damage to the battery pack caused by temperature fluctuations.

[0033] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the claims.

Claims

1. A lithium battery heating device under a new energy vehicle high-voltage platform, comprising a lithium battery pack (1), characterized in that: Both sides of the lithium battery pack (1) are provided with heating devices (2), the heating device (2) comprises a heat-conducting shell (21), the inside of the heat-conducting shell (21) is provided with symmetrically distributed heating plates (22), the inside of the heating plate (22) is connected with a heating assembly (24) through a buffer plate (23), and the outside of the heating device (2) is sleeved with a protective shell (11) corresponding to itself.

2. The lithium battery heating device under the high-voltage platform of new energy vehicles according to claim 1, characterized in that: The protective shell (11) is provided with an insulating plate (12) on the side close to the heating device (2), and the insulating plate (12) is provided with a plurality of uniformly distributed heat dissipation pipelines (13).

3. The lithium battery heating device under the high-voltage platform of new energy vehicles according to claim 1, characterized in that: Both sides of the lithium battery pack (1) are correspondingly connected with fixed connecting pieces (14) corresponding to the heat-conducting shell (21).

4. The lithium battery heating device under the high-voltage platform of new energy vehicles according to claim 1, characterized in that: The heating assembly (24) comprises at least one heating element, the heating element is connected with a battery management system through a wire, is used for receiving a control signal and adjusting a heating power.

5. The lithium battery heating device under the high-voltage platform of new energy vehicles according to claim 2, characterized in that: The heat dissipation pipeline (13) circulates cooling liquid inside, is used for absorbing and taking away excess heat in the heating process, and keeps the temperature of the heating device (2) in a safe range.

6. The lithium battery heating device under the high-voltage platform of new energy vehicles according to claim 3, characterized in that: The fixed connecting piece (14) comprises a fixed support (141) and a fastener (142), the fixed support (141) is matched with the shell of the lithium battery pack (1), and the fastener (142) is used for tightly fixing the heat-conducting shell (21) and the fixed support (141).

7. The lithium battery heating device under the high-voltage platform of new energy vehicles according to claim 1, characterized in that: The buffer plate (23) is made of elastic material and is used for absorbing thermal expansion generated in the heating process, preventing mechanical stress on the lithium battery pack (1).

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