Battery pack structure

Abstract

The present invention discloses a battery pack structure, including a shell and a battery module arranged in the shell, a heat-conducting structure is arranged inside the shell, the heat-conducting structure is used to extract the heat generated by the battery module, a liquid cooling pipe is arranged outside the shell, the heat extracted by the heat-conducting structure is transferred to the liquid cooling pipe through the shell, and the heat is taken away by the cooling medium circulating in the liquid cooling pipe. The battery pack structure provided by the present invention has a heat-conducting structure arranged inside the shell to extract the heat generated by the battery module, and a liquid cooling pipe is arranged outside the shell, the heat-conducting structure transfers the heat to the cold liquid pipe through the shell, and the heat is taken away by the coolant circulating in the liquid cooling pipe, so that the heat dissipation effect of the battery pack is better. In addition, the liquid cooling pipe and the battery module are arranged outside and inside the shell respectively, and the shell isolates the battery module and the liquid cooling pipe to prevent the leakage of the liquid cooling pipe from damaging the battery module.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a battery pack structure. Background Art

[0002] Existing battery packs usually use air cooling, or liquid cooling with liquid cooling tubes placed inside the battery box, and heat pipes are arranged between the batteries to cool the batteries, preventing the temperature from being too high during the charging and discharging process of the batteries.

[0003] However, the cooling structures of the above-mentioned battery packs have problems such as low air cooling efficiency, complex process of installing liquid cooling tubes inside the battery box, and reduction of the safety of the battery pack caused by the rupture of the cold liquid tubes, which are not conducive to improving the performance of the batteries. Summary of the Invention

[0004] In view of this, one of the purposes of the present invention is to provide a battery pack structure that can improve the heat dissipation performance and safety performance.

[0005] The present invention provides a battery pack structure, including a housing and a battery module arranged inside the housing. An endothermic structure is arranged inside the housing, and the heat conduction structure is used to absorb the heat generated by the battery module.

[0006] A liquid cooling tube is arranged outside the housing. The heat absorbed by the heat conduction structure is transferred to the liquid cooling tube through the housing, and the heat is taken away by the cooling medium flowing inside the liquid cooling tube.

[0007] Preferably, the housing includes a box body and a cover body, and the heat conduction structure includes:

[0008] A first heat conduction tube arranged on the inner wall of the box body, and / or a second heat conduction tube arranged on the cover body.

[0009] Preferably, the first heat conduction tube is embedded into the box body, and / or the second heat conduction tube is embedded into the cover body.

[0010] Preferably, the liquid cooling tube is arranged on the box body and / or the cover body.

[0011] Preferably, the heat conduction structure further includes:

[0012] A first heat conduction plate, the first heat conduction plate is in contact with the battery module and the first heat conduction tube, and the first heat conduction plate transfers the heat generated by the battery module to the first heat conduction tube; and / or,

[0013] A second heat conduction plate, the second heat conduction plate is in contact with the battery module and the second heat conduction tube, and the second heat conduction plate transfers the heat generated by the battery module to the second heat conduction tube.

[0014] Preferably, the first heat conduction plate and / or the second heat conduction plate are configured as plate-like structures capable of being attached to the battery module.

[0015] Preferably, both ends of the first heat conduction tube are in contact with the cover body, and the heat absorbed by the first heat conduction tube is transferred to the cover body.

[0016] Preferably, the liquid cooling tube is arranged on the cover body, so that the heat absorbed by the first heat conduction tube and the second heat conduction tube is transferred to the liquid cooling tube through the cover body.

[0017] Preferably, the liquid cooling tube is embedded inside the cover body.

[0018] Preferably, heat dissipation fins are arranged on the cover body.

[0019] For the battery pack structure provided by the present invention, a heat conduction structure is arranged inside the housing to absorb the heat generated by the battery module, and a liquid cooling tube is arranged outside the housing. The heat conduction structure transfers the heat to the liquid cooling tube through the housing, and the heat is carried away by the coolant flowing inside the liquid cooling tube, so that the heat dissipation effect of the battery pack is better. Moreover, by separately arranging the liquid cooling tube and the battery module outside and inside respectively, the battery module and the liquid cooling tube can be isolated, avoiding damage to the battery module caused by leakage of the liquid cooling tube. Description of the Drawings

[0020] Through the following description of the embodiments of the present invention with reference to the drawings, the above and other objects, features and advantages of the present invention will become clearer. In the drawings:

[0021] Figure 1 An exploded structural schematic diagram of the battery pack structure provided by the present invention is shown;

[0022] Figure 2 A schematic diagram of the distribution of the liquid cooling tube on the cover body structure is shown;

[0023] Figure 3 、 4 A schematic diagram of the distribution of the second heat conduction tube on the cover body is shown. Detailed Embodiments

[0024] The following is a description of the present invention based on embodiments, but the present invention is not limited to these embodiments. Those of ordinary skill in the art should understand that the drawings provided herein are all for illustrative purposes and are not necessarily drawn to scale.

[0025] Unless the context clearly requires otherwise, the words "including", "comprising" and similar words throughout the specification and claims should be construed in an inclusive sense rather than an exclusive or exhaustive sense; that is, the meaning of "including but not limited to".

[0026] In the description of the present invention, it should be understood that terms such as "first", "second", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0027] The present invention provides a battery pack structure, as Figure 1 shown, including a box body 1, a cover body 2 and a battery module 3. The cover body 2 is covered on the box body 1 to form the housing of the battery pack. An accommodation space is formed inside the housing, and the battery module 3 is arranged in the accommodation space. A positive electrode interface 12, a negative electrode interface 13, a communication interface 14 and an explosion-proof valve 15 are arranged on the box body 1. The positive electrode interface 12 and the negative electrode interface 13 are respectively connected to the positive electrode and the negative electrode of the battery module 3. The explosion-proof valve 15 is used for rapid pressure relief to prevent explosion due to excessive pressure inside the box body 1. A control module 31 connected to the battery module 3 is also arranged inside the box body 1. The control module 31 is used to control the battery module 3, such as controlling the charging and discharging speed of the battery module 3. The communication interface 14 is connected to the control module 31, enabling the control module 31 to be connected to an external control component, thereby realizing the control of the battery module 3.

[0028] A heat conduction structure is provided inside the housing, and the heat conduction structure is used to conduct the heat generated by the battery module 3. The heat conduction structure includes a first heat conduction pipe 11 disposed in the box body 1. The first heat conduction pipe 11 is used to absorb the heat generated during the charging and discharging process of the battery module 3. A plurality of the first heat conduction pipes 11 are provided, and the plurality of first heat conduction pipes 11 are in contact with the battery module 3. Preferably, the first heat conduction pipe 11 is embedded inside the box body 1. Alternatively, the heat conduction structure further includes a first heat conduction plate 41 disposed between the first heat conduction pipe 11 and the battery module 3. The first heat conduction pipe 41 is in contact with the battery module 3 and the first heat conduction pipe 11. The heat generated by the battery module 3 is transferred to the first heat conduction pipe 11 through the first heat conduction plate 41. The contact area between the first heat conduction plate 41 and the battery module 3 is larger, so as to ensure that the heat generated by each part of the battery module 3 can be absorbed more evenly. Preferably, the first heat conduction plate 41 is made of a material with good heat conduction performance. For example, the first heat conduction plate 41 can be a phase change material with high heat conductivity and insulation, and specifically, paraffin composite material, graphite phase change composite material, etc. can be selected, and graphite phase change composite material is preferably selected. Further, the structure of the first heat conduction plate 41 is a plate-like structure adapted to the surface shape of the battery module 3, so that the first heat conduction plate 41 can be attached to the battery module 3. In this embodiment, the first heat conduction plate 41 is configured as a flat plate structure and attached to the bottom wall of the battery module 3. In other embodiments, the first heat conduction plate 41 can also be in contact with the bottom wall and the side wall of the battery module 3 at the same time to increase the heat absorption area.

[0029] The cover body 2 is covered on the box body 1, and the box body 1 and the cover body 2 are in contact. The box body 1 is preferably made of a material with good heat conduction performance, and the box body 1 is preferably a metal material, such as an aluminum alloy material. The contact between the cover body 2 and the box body 1 enables the heat absorbed by the first heat conduction pipe 11 to be transferred to the cover body 2 through the box body 1. Alternatively, the two ends of the first heat conduction pipe 11 are extended to the surface in contact with the cover body 2, so that the heat absorbed by the first heat conduction pipe 11 can be more conveniently transferred to the cover body 2.

[0030] The cover body 2 is made of a material with good heat conduction performance. The cover body 2 is preferably a metal material, such as an aluminum alloy material. A liquid cooling pipe is provided outside the housing, such as Figure 1 、 2As shown, the liquid cooling pipe 21 is disposed on the cover body 2. The liquid cooling pipe 21 includes an inlet end 211 and an outlet end 212. The inlet end 211 and the outlet end 212 are communicated with a coolant circulation pipeline, so that the coolant can flow in the liquid cooling pipe 21 to take away heat. The liquid cooling pipe 21 is disposed on the surface of the cover body 2 away from the box body 1, that is, the liquid cooling pipe 21 is located outside the accommodation cavity formed by the cover body 2 and the box body 1, so as to ensure that when a failure such as leakage occurs in the liquid cooling pipe 21, the battery module 3 will not be damaged. As Figure 2 shown, the liquid cooling pipe 21 is arranged in a serpentine shape on the cover body 2 to increase the length thereof arranged on the cover body 2. Preferably, the liquid cooling pipe 21 is embedded in the cover body 2 to increase the contact area between the liquid cooling pipe 21 and the cover body 2. Further, fins are arranged on the liquid cooling pipe 21 to further increase its heat dissipation effect. Alternatively, a heat dissipation fin or other structure capable of increasing the heat dissipation area can also be arranged on the cover body 2 to increase the contact area between the cover body 2 and the air.

[0031] As Figure 3 , 4 shown, the heat conduction structure further includes a second heat conduction pipe 22 disposed on the surface of the cover body 2 close to the battery module 3, that is, the second heat conduction pipe 22 is located inside the accommodation cavity formed by the cover body 2 and the box body 1. The second heat conduction pipe 22 is used to absorb the heat dissipated by the battery module 3, and the second heat conduction pipe 22 is embedded inside the cover body 2. The second heat conduction pipes 22 can be arranged in multiple numbers parallel to each other as shown in Figure 3 , and the multiple second heat conduction pipes 22 extend linearly. Alternatively, the second heat conduction pipe 22 can also be arranged as a pipe with a bent or folded structure as shown in Figure 4 , and can be an L-shaped structure or any other shape structure. Preferably, as Figure 1As shown, a second heat conducting plate 42 is disposed between the cover body 2 and the battery module 3. The second heat conducting plate 42 is in contact with the second heat conducting tube 22 and the battery module 3. The second heat conducting plate 42 is used to transfer the heat generated by the battery module 3 to the second heat conducting tube 22. The contact area between the second heat conducting plate 42 and the battery module 3 is larger, so as to ensure that the heat generated by each part of the battery module 3 can be absorbed more uniformly. Preferably, the second heat conducting plate 42 is made of a material with good heat conducting performance. For example, the second heat conducting plate 42 can be a phase change material with high heat conductivity and insulation, and specifically, paraffin composite material, graphite phase change composite material, etc. can be selected, and preferably graphite phase change composite material. Further, the structure of the second heat conducting plate 42 is a plate-like structure adapted to the surface shape of the battery module 3, so that the second heat conducting plate 42 can be attached to the battery module 3. In this embodiment, the second heat conducting plate 42 is configured as a flat plate structure and attached to the top wall of the battery module 3.

[0032] Preferably, in order to further improve the heat dissipation performance of the battery pack, a cold liquid tube can also be provided on the box body 1, and the heat of the first heat conducting tube 11 is absorbed through the liquid cooling tube on the box body 1.

[0033] The battery pack structure provided by the present invention arranges the liquid cooling tube outside the box body, isolating it from the battery module, so as to avoid damage to the battery module when a failure such as leakage occurs in the liquid cooling tube. Moreover, by utilizing the heat conducting performance of the cover body, the heat absorbed by the first heat conducting tube and the second heat conducting tube can be absorbed by the coolant in the liquid cooling tube, achieving the effect of heat dissipation and improving the heat dissipation effect of the battery pack.

[0034] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above preferred solutions can be freely combined and superimposed.

[0035] It should be understood that the above embodiments are merely exemplary and not restrictive. Without departing from the basic principle of the present invention, various obvious or equivalent modifications or substitutions made by those skilled in the art to the above details will all be included within the scope of the claims of the present invention.

Claims

1. A battery pack structure, characterized in that, it includes a housing and a battery module disposed within the housing, a heat conduction structure is provided inside the housing, and the heat conduction structure is used to conduct the heat generated by the battery module, a liquid cooling pipe is provided outside the housing, and the heat conducted by the heat conduction structure is transferred to the liquid cooling pipe through the housing, and the heat is carried away by the cooling medium flowing inside the liquid cooling pipe; the housing includes a box body and a cover body, and the heat conduction structure includes: a first heat conduction pipe disposed on the inner wall of the box body, and a second heat conduction pipe disposed on the cover body; the heat conduction structure further includes: a first heat conduction plate, the first heat conduction plate is in contact with the battery module and the first heat conduction pipe, and the first heat conduction plate transfers the heat generated by the battery module to the first heat conduction pipe; and a second heat conduction plate, the second heat conduction plate is in contact with the battery module and the second heat conduction pipe, and the second heat conduction plate transfers the heat generated by the battery module to the second heat conduction pipe; the first heat conduction plate and / or the second heat conduction plate is configured as a plate-like structure capable of fitting with the battery module; the first heat conduction pipe is embedded in the box body, and / or, the second heat conduction pipe is embedded in the cover body.

2. The battery pack structure according to claim 1, characterized in that, the liquid cooling pipe is provided on the box body and / or the cover body.

3. The battery pack structure according to claim 1, characterized in that, both ends of the first heat conduction pipe are in contact with the cover body, and the heat absorbed by the first heat conduction pipe is transferred to the cover body.

4. The battery pack structure according to claim 3, characterized in that, the liquid cooling pipe is provided on the cover body, so that the heat absorbed by the first heat conduction pipe and the second heat conduction pipe is transferred to the liquid cooling pipe through the cover body.

5. The battery pack structure according to claim 4, characterized in that, the liquid cooling pipe is embedded inside the cover body.

6. The battery pack structure according to any one of claims 1-5, characterized in that, heat dissipation fins are provided on the cover body.

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