Power battery assembly

Abstract

The utility model discloses a power battery assembly which comprises a box body and battery modules, a plurality of battery cavities are arranged in the box body, the battery modules are positioned in the battery cavities, a channel is arranged between two adjacent battery cavities, and nano-particle suspension liquid is stored in the channels. According to the power battery assembly disclosed by the utility model, when the box body is impacted by an external force and the external force is transmitted to the battery cavity, the nano-particle suspension has a non-Newtonian fluid characteristic when the nano-particle suspension is impacted by the external force, so that the acting force on the battery cavity is reduced, and the service life of the battery is further prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, and in particular relates to a power battery assembly. Background Technology

[0002] The performance of the power battery in a new energy vehicle directly determines the vehicle's driving range. When the battery temperature is too high, the battery life decreases, the battery capacity degrades, and it may even lead to battery damage; when the battery temperature is too low, the activity of the active materials decreases, the battery capacity degrades, and the driving range is reduced.

[0003] In existing technologies, new energy battery modules are usually placed in a box to protect the internal battery modules. However, when the box is subjected to a large external impact, part of the force is transferred to the internal battery modules, which can easily lead to damage to the internal battery modules and a reduction in their service life. Therefore, this needs to be improved.

[0004] Chinese patent application number 202210014309.0 discloses a power battery assembly, including a lower housing, an upper housing, and multiple cell stacks. The lower housing and the upper housing are fastened and fixedly connected. The cell stacks are disposed in the cavity formed by the fastening of the lower housing and the upper housing and are disposed on the surface of a cooling plate. The cell stack includes a cell group, and the cell group includes multiple cells. The sides and bottom of the cell group are exposed, and the cells of the cell group are in contact with the cooling plate.

[0005] The goal is to provide an improved power battery assembly, particularly regarding how to increase its lifespan. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a power battery assembly with the purpose of improving its service life.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a power battery assembly, including a housing and a battery module, wherein multiple battery chambers are provided in the housing, the battery module is located in the battery chamber, and a channel is provided between two adjacent battery chambers, wherein a nanoparticle suspension is stored in the channel.

[0008] The battery cavity is made of carbon fiber composite material.

[0009] The power battery assembly also includes a cover, which is disposed on the housing. A cooling module is disposed on the cover, and the cooling module includes multiple cooling units, each corresponding to a battery cavity.

[0010] The cooling unit is movable and is configured to switch between a contact state and a separation state with the battery cavity.

[0011] The cooling unit is connected to the drive mechanism.

[0012] The cooling unit is filled with a refrigerant.

[0013] The power battery assembly of this invention exhibits non-Newtonian properties when the housing is impacted by an external force and the force is transmitted to the battery cavity. This reduces the force on the battery cavity and extends the battery's lifespan. Furthermore, by incorporating a movable cooling module, when the battery temperature rises abnormally, the cooling module descends to contact the battery module and cools it down. Attached Figure Description

[0014] This manual includes the following figures, which illustrate the following:

[0015] Figure 1 This is a schematic diagram of the combined structure of the box and the battery cavity;

[0016] Figure 2 This is a schematic diagram of the combined structure of the cover and the cooling module assembly;

[0017] The following are labeled in the diagram: 1. Box body; 2. Battery cavity; 3. Separating membrane; 4. Nanoparticle suspension; 5. Cover; 6. Cooling unit. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of this utility model, and to facilitate its implementation.

[0019] like Figure 1 and Figure 2 As shown, this utility model provides a power battery assembly, including a housing 1 and battery modules. The housing 1 contains battery chambers 2 for housing the battery modules. Separating membranes 3 are provided on the four inner walls and bottom of the housing 1. Multiple battery chambers 2 are provided, all arranged in a honeycomb pattern. The battery chambers 2 are made of carbon fiber composite material, possessing excellent specific stiffness, specific strength, and specific energy absorption, and are also insulating, preventing mutual interference between battery cells. Their structure has a periodic topological distribution characteristic, resulting in strong load-bearing capacity, ingenious construction, material savings, and more rational space utilization, thus reducing the overall weight of the battery pack and achieving lightweight design.

[0020] like Figure 1As shown, a channel is provided between two adjacent battery chambers 2, and the channel stores a suspension of nanoparticles. A water pump is installed outside the housing 1. One end of the water pump is connected to the water inlet of the housing 1, and the other end of the water pump is connected to a storage tank. The storage tank is used to store the nanoparticle suspension. The water outlet of the housing 1 is connected to the storage tank, which is located outside the housing 1. The channel inside the housing 1 communicates with the water inlet and the water outlet. After the water pump is running, the nanoparticle suspension can circulate between the housing 1 and the storage tank.

[0021] like Figure 1 and Figure 2 As shown, the power battery also includes a cover 5, which is fixedly mounted on the housing 1. The cover 5 is used to seal the battery cavity 2 and the housing 1. A cooling module is installed on the cover 5, which includes multiple cooling units 6, each corresponding to a battery cavity 2. The cooling units 6 are movable and can switch between a contact state and a separation state with the battery cavity 2. When the cooling unit 6 is in contact with the battery cavity 2, it can cool the battery module; when the cooling unit 6 is separated from the battery cavity 2, it cannot cool the battery module.

[0022] The cooling module consists of multiple cooling units 6, which are connected to a drive mechanism. The drive mechanism controls the linear movement of each cooling unit 6, enabling contact and separation between the cooling unit 6 and the battery cavity 2 and the battery module. The drive mechanism mainly includes actuators, with multiple actuators, each connected to one cooling unit 6. The actuators are retractable components, such as electric cylinders. The number of cooling units 6 is the same as the number of battery cavities 2, with each cooling unit 6 corresponding to one battery cavity 2. The movement of the cooling unit 6 is controlled by the extension and retraction of the actuators, thereby achieving contact and separation between the cooling unit 6 and the battery cavity 2.

[0023] In this invention, contact cooling is employed. By setting up a cooling module, when the temperature of the power battery reaches a certain range, the cooling module extends and comes into close contact with the battery to cool it down.

[0024] If a battery catches fire, or if an external impact causes the battery to catch fire, the cooling module, which is close to the battery, can isolate and protect the battery.

[0025] The cooling module uses a cold storage agent, which is filled in the cooling unit 6. The cold storage agent is a semi-transparent (or opaque), viscous gel-like mixture composed of organic or inorganic compounds. It can absorb and store a large amount of cold energy at low temperatures and release a large amount of cold energy when the external temperature is high. It can maintain a low-temperature environment in itself and a small area around it for a long time.

[0026] In this invention, by adopting the above-mentioned technical solution, when the housing 1 is impacted by an external force and the force is transmitted to the battery cavity 2, the nanoparticle suspension exhibits non-Newtonian properties under the external force, thereby reducing the force on the battery cavity 2 and extending the battery's lifespan. When the battery experiences an abnormal temperature rise, the cooling module descends to contact the battery and cools it down.

[0027] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A power battery assembly, comprising a housing and battery modules, characterized in that: The box contains multiple battery chambers, with the battery module located within each chamber. A channel is provided between two adjacent battery chambers, and the channel stores a suspension of nanoparticles.

2. The power battery assembly according to claim 1, characterized in that: The battery cavity is made of carbon fiber composite material.

3. The power battery assembly according to claim 1, characterized in that: It also includes a cover, which is disposed on the box body. A cooling module is disposed on the cover, and the cooling module includes multiple cooling units, each of which corresponds to a battery cavity.

4. The power battery assembly according to claim 3, characterized in that: The cooling unit is movable and is configured to switch between a contact state and a separation state with the battery cavity.

5. The power battery assembly according to claim 4, characterized in that: The cooling unit is connected to the drive mechanism.

6. The power battery assembly according to claim 4, characterized in that: The cooling unit is filled with a refrigerant.

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