Battery heat dissipation structure

Abstract

The utility model relates to the technical field of battery heat dissipation, and particularly provides a battery heat dissipation structure which comprises a mounting part and a heat conduction part, an accommodating cavity is formed in the mounting part; the plurality of battery cells are sequentially arranged and distributed in the accommodating cavity; an air duct is further arranged in the mounting part; a plurality of evaporation ends and a plurality of condensation ends are arranged on the heat conduction part; the plurality of evaporation ends are respectively arranged between every two adjacent battery cells, and each condensation end is inserted into the air duct. The heat can be introduced into the air duct through the plurality of evaporation ends and the plurality of condensation ends, and along with high-rate discharge of the battery cell, the power is improved, and the speed is increased, so that the air speed in the air duct is increased to dissipate heat. The original mode that a driving device needs to be independently arranged to provide driving force for cooling is replaced, the occupied space is saved, the size and settable number of the battery cells are increased, the situation that the electric quantity of the battery cells is consumed is avoided, and the probability of operation faults is reduced while the performance of the battery cells is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery heat dissipation, and in particular relates to a battery heat dissipation structure. Background Art

[0002] Power batteries have a wide range of applications, encompassing multiple fields of use. During use, a power battery's temperature can continue to rise, easily impacting its normal operation. Therefore, maintaining the battery's temperature within a reasonable range is crucial for ensuring its continued normal operation.

[0003] Existing power batteries generally use natural cooling, forced air cooling, or liquid cooling to cool the battery, thereby maintaining the battery temperature within a reasonable range. However, the efficiency of cooling the power battery through natural cooling is too low, which greatly affects the operating efficiency of the power battery. When cooling the power battery through forced air cooling or liquid cooling, a separate drive device is required to provide the driving force for cooling the power battery. This not only takes up space that could be used to install the power battery and limits the size of the power battery, but the operation of the drive device also consumes the power of the power battery, which greatly affects the performance of the power battery. At the same time, especially with liquid cooling, there is a risk of leakage due to the complex piping of the liquid cooling plate.

[0004] Therefore, it is difficult to cool down existing power batteries while ensuring performance. Utility Model Content

[0005] In view of the above problems, the present invention proposes a battery heat dissipation structure, comprising:

[0006] an installation portion, wherein a receiving cavity is provided in the installation portion;

[0007] A plurality of battery cells are sequentially arranged and distributed in the accommodating cavity;

[0008] An air duct is also provided in the installation portion;

[0009] a heat conducting portion, wherein the heat conducting portion is provided with a plurality of evaporation ends and a plurality of condensation ends;

[0010] A plurality of evaporation ends are respectively arranged between every two adjacent battery cells, and each condensation end is inserted into the air duct.

[0011] In some specific embodiments, there are multiple accommodating cavities, and the multiple accommodating cavities are arranged in sequence;

[0012] The air duct is extended along the arrangement direction of the plurality of accommodating cavities.

[0013] In some specific embodiments, the mounting portion includes:

[0014] A box body, wherein a plurality of longitudinal beams are arranged in the box body;

[0015] A bottom guard plate, wherein the bottom guard plate cover is provided on one side of the box body, and the air duct is provided in the bottom guard plate;

[0016] The box body, the longitudinal beam and the bottom guard plate together form a plurality of accommodating cavities.

[0017] In some specific embodiments, the bottom guard plate is a profile plate.

[0018] In some specific embodiments, the heat conducting portion includes:

[0019] A heat conducting plate, wherein there are multiple heat conducting plates, and the multiple heat conducting plates are respectively arranged between every two adjacent battery cells;

[0020] Heat pipes, wherein there are multiple heat pipes, and the multiple heat pipes are arranged in a one-to-one correspondence with the multiple heat conducting plates;

[0021] One end of the heat pipe forms the evaporation end and is connected to the heat conduction plate, and the other end of the heat pipe forms the condensation end and is inserted into the air duct.

[0022] In some specific embodiments, the evaporation end of the heat pipe is arranged along the outer side of the heat conducting plate and wrapped around the heat conducting plate.

[0023] In some specific embodiments, the condensing end of the heat pipe is provided with fins.

[0024] In some specific embodiments, the large surfaces of each two adjacent battery cells are arranged facing each other;

[0025] The heat conducting plate is sandwiched between the large surfaces of the two corresponding battery cells.

[0026] In some specific embodiments, a tab is provided on the small face of each of the battery cells.

[0027] In some specific embodiments, pole pieces are respectively provided at both ends of the plurality of battery cells, the pole pieces are connected to the pole ears, and one end of the pole piece is bent away from the battery cell and extends to the box or the longitudinal beam.

[0028] The battery heat dissipation structure of the present invention can accommodate multiple battery cells through the accommodating cavity of the mounting portion. The heat of the multiple battery cells during operation can be extracted through the multiple evaporation ends of the heat conducting portion. Under the action of the multiple condensation ends of the heat conducting portion, the heat of the extracted multiple battery cells is introduced into the air duct provided in the mounting portion. As the multiple battery cells discharge at high rates, the power and speed increase, causing the wind speed in the air duct to increase as well, thereby dissipating the heat introduced into the air duct through the multiple condensation ends of the heat conducting portion. This replaces the original method of requiring a separate drive device to provide driving force for cooling, saves space, increases the size and number of battery cells that can be set, avoids the situation of consuming the power of the battery cells, and reduces the probability of operational failure while improving the performance of the battery cells.

[0029] 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 and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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.

[0031] Figure 1 A schematic diagram of a battery heat dissipation structure in an embodiment of the present utility model is shown;

[0032] Figure 2 A schematic side view of a battery heat dissipation structure in an embodiment of the present utility model is shown;

[0033] Figure 3 A schematic diagram of a heat conducting portion in an embodiment of the present utility model is shown;

[0034] Figure 4 A partial side view schematic diagram of the battery heat dissipation structure in an embodiment of the present utility model is shown with the mounting portion removed.

[0035] In the figure, 100, mounting part; 110, box body; 120, bottom guard plate; 130, longitudinal beam; 200, heat conduction part; 210, heat conduction plate; 220, heat pipe; 230, fin; 300, battery cell; 310, tab; 320, pole piece. DETAILED DESCRIPTION

[0036] 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.

[0037] Reference Figure 1 The present invention provides a battery heat dissipation structure, comprising: a mounting portion 100 and a heat conducting portion 200. A receiving cavity is provided within the mounting portion 100. A plurality of battery cells 300 are sequentially arranged and distributed within the receiving cavity. An air duct is also provided within the mounting portion 100. The heat conducting portion 200 is provided with a plurality of evaporation terminals and a plurality of condensation terminals. The plurality of evaporation terminals are respectively provided between each two adjacent battery cells 300, and each condensation terminal is inserted into the air duct.

[0038] Specifically, a receiving cavity is provided in the installation portion 100, and a plurality of battery cells 300 are arranged and connected in sequence and arranged in the receiving cavity. An air duct is also provided in the installation portion 100. When power is supplied through the battery cells 300, it can provide power to the power device on which the battery cells 300 are installed, so that wind will continuously pass through the air duct as the power device runs. A plurality of evaporation ends and a plurality of condensation ends are provided on the heat conducting portion 200. The plurality of evaporation ends are all provided in the receiving cavity and connected to the plurality of battery cells 300. Each evaporation end is respectively located between each two adjacent battery cells 300, and any evaporation end can receive the heat emitted by the two battery cells 300 arranged adjacent to it. The plurality of condensation ends are all inserted in the air duct, and the plurality of condensation ends are connected one-to-one with the plurality of evaporation ends. When any evaporation end receives heat from two adjacent battery cells 300, the heat received by the evaporation end is transferred along the heat conducting portion 200 to the condensing end. Once the heat received by the evaporation end is transferred to the condensing end, the heat transferred to the condensing end is carried away by the wind continuously passing through the air duct, thereby dissipating heat and cooling the battery cells 300. The multiple evaporation ends can extract the heat from the multiple battery cells 300 during operation. The multiple condensing ends of the heat conducting portion 200 then introduce the extracted heat from the multiple battery cells 300 into the air duct. As the multiple battery cells 300 discharge at high rates, the power and speed of the power device equipped with the battery cells 300 increase, which in turn increases the wind speed passing through the air duct. This ensures that the discharge performance of the battery cells 300 matches the heat dissipation efficiency and maintains a normal temperature. It replaces the original method of requiring a separate driving device to provide driving force for cooling, saves space, increases the size and configurable number of battery cells 300, avoids the consumption of power of battery cells 300, and improves the performance of battery cells 300. At the same time, it ensures the normal temperature of battery cells 300 and reduces the probability of operating failures.

[0039] In some specific embodiments of the present invention, refer to Figure 2 There are multiple accommodating cavities, and the multiple accommodating cavities are arranged in sequence. The air duct extends along the arrangement direction of the multiple accommodating cavities. Specifically, there are multiple accommodating cavities, and the multiple accommodating cavities are arranged in sequence. The multiple battery cells 300 are respectively arranged in the multiple accommodating cavities. The number of battery cells 300 can be differentiated by the multiple accommodating cavities, thereby avoiding too many battery cells 300 in a single accommodating cavity, preventing the structural stress of the box body 110 from being too large, and also avoiding excessive temperature and difficulty in heat dissipation caused by too many battery cells 300 in a single accommodating cavity, thereby ensuring the effect of heat dissipation and cooling. The two ends of the air duct extend along the arrangement direction between the multiple accommodating cavities, so that the wind that continuously passes through the air duct can pass through the location of each accommodating cavity in sequence, ensuring the uniformity of the heat dissipation and cooling amplitude of the multiple battery cells 300.

[0040] In some specific embodiments of the present invention, refer to Figure 2 The mounting portion 100 includes: a box body 110 and a bottom guard plate 120. A plurality of longitudinal beams 130 are arranged in the box body 110. The bottom guard plate 120 cover is arranged on one side of the box body 110, and the air duct is arranged in the bottom guard plate 120. The box body 110, the longitudinal beams 130 and the bottom guard plate 120 are enclosed into a plurality of accommodating cavities. Specifically, the bottom guard plate 120 cover is arranged at the bottom of the box body 110, and the plurality of longitudinal beams 130 are evenly arranged along the length direction of the box body 110. The two ends of each longitudinal beam 130 extend along the width direction of the box body 110 and are connected to the inner wall of the box body 110, so that the box body 110, the bottom guard plate 120 and the plurality of longitudinal beams 130 can be enclosed into a plurality of accommodating cavities arranged in sequence along the length direction of the box body 110. The air duct is located within the bottom guard plate 120, with both ends extending along the length of the bottom guard plate 120 (and therefore the length of the housing 110), allowing air within the duct to pass through each chamber in sequence. The evaporation end of the heat transfer unit 200 is located within the chamber, while the condensation end of the heat transfer unit 200 is inserted through the outer wall of the bottom guard plate 120 and inserted into the air duct. This flexible and simple structure ensures heat dissipation and cooling while facilitating installation and use.

[0041] Furthermore, the bottom guard plate 120, the box body 110 and the plurality of longitudinal beams 130 are an integrated structure, thereby ensuring the installation stability of the overall structure.

[0042] In some specific embodiments of the present invention, refer to Figure 1 The bottom guard plate 120 is a profile plate. By opening the air duct on the profile plate, the side force performance of the air duct and the overall structural rigidity after assembly can be guaranteed.

[0043] In some specific embodiments of the present invention, refer to Figure 3The heat conducting part 200 includes: a heat conducting plate 210 and a heat pipe 220. There are multiple heat conducting plates 210, and the multiple heat conducting plates 210 are respectively arranged between each two adjacent battery cells 300. There are multiple heat pipes 220, and the multiple heat pipes 220 are arranged in a one-to-one correspondence with the multiple heat conducting plates 210. One end of the heat pipe 220 forms an evaporation end and is connected to the heat conducting plate 210, and the other end of the heat pipe 220 forms a condensation end and is inserted into the air duct. Specifically, there are multiple heat conducting plates 210, and the multiple heat conducting plates 210 are respectively arranged in multiple accommodating cavities, wherein each heat conducting plate 210 in each accommodating cavity is respectively located between each two adjacent battery cells 300 in the accommodating cavity, and is respectively abutted and connected with the two adjacent battery cells 300. Any heat conducting plate 210 can receive the heat emitted by the two battery cells 300 adjacent to it. There are multiple heat pipes 220, each corresponding to a plurality of heat conducting plates 210. One end of each heat pipe 220 is connected to the heat conducting plate 210, so that the end of the heat pipe 220 directly connected to the heat conducting plate 210 forms the evaporation end of the heat conducting portion 200. Heat emitted by two adjacent battery cells 300 and received by the heat conducting plate 210 passes through the evaporation end of the heat pipe 220 and enters the heat pipe 220 and is transferred along the heat pipe 220. The other end of the heat pipe 220 is inserted through the outer wall of the bottom guard plate 120 into the air duct provided within the bottom guard plate 120, so that the end of the heat pipe 220 inserted into the air duct forms the condensation end of the heat conducting portion 200. Heat transferred along the heat pipe 220 to the condensation end of the heat pipe 220 can be carried away by the wind continuously passing through the air duct, thereby achieving heat dissipation and cooling of the battery cells 300.

[0044] In some specific embodiments of the present invention, refer to Figure 3 The evaporation end of the heat pipe 220 is arranged along the outer edge of the heat conducting plate 210 and wrapped around the heat conducting plate 210. Specifically, the end of the heat pipe 220 directly connected to the heat conducting plate 210 is wrapped around the heat conducting plate 210 and connected to the heat conducting plate 210. This can increase the contact area between the heat pipe 220 and the heat conducting plate 210, facilitate the transfer of heat from the two adjacent battery cells 300 received by the heat conducting plate 210 to the heat pipe 220, improve the heat conduction efficiency, and thus ensure the heat dissipation and cooling effect on the battery cells 300.

[0045] Furthermore, the end of the heat pipe 220 directly connected to the heat conducting plate 210 is sequentially arranged along multiple outer edges of the heat conducting plate 210, thereby realizing the winding arrangement of the heat conducting plate 210. At the same time, the arrangement along multiple outer edges of the heat conducting plate 210 can not only ensure that there is sufficient contact area between the heat pipe 220 and the heat conducting plate 210, but also make the connection layout more reasonable, so that the heat conducting plate 210 wrapped with the heat pipe 220 is conveniently arranged between adjacent battery cells 300, thereby reducing the occupied space after assembly, allowing more battery cells 300 to be arranged, and ensuring the energy density of the assembled battery pack to provide sufficient power.

[0046] In some specific embodiments of the present invention, refer to Figure 3 The condensing end of the heat pipe 220 is provided with fins 230. There are multiple fins 230, which are arranged in sequence along the axial direction of the condensing end of the heat pipe 220, and there is a gap between each two adjacent fins 230. The multiple fins 230 can further increase the heat exchange area of ​​the condensing end of the heat pipe 220, making it easier for wind passing through the air duct to contact and remove heat, thereby improving the heat dissipation and cooling efficiency of the battery cell 300. At the same time, the structure is simple and the cost is low. While achieving heat dissipation and cooling, it greatly saves occupied space.

[0047] In some specific embodiments of the present invention, refer to Figure 4 The large surfaces of each two adjacent battery cells 300 are arranged facing each other. The heat conducting plate 210 is sandwiched between the large surfaces of the corresponding two battery cells 300. Specifically, the multiple battery cells 300 in each accommodating cavity are arranged in sequence along the width direction of the box body 110, so that the large surfaces of each two adjacent battery cells 300 are arranged facing each other. The corresponding heat conducting plate 210 is arranged between the large surfaces of the two adjacent battery cells 300, thereby clamping the corresponding heat conducting plate 210 through the large surfaces of the two adjacent battery cells 300. While completing the fixing of the heat conducting plate 210, the contact area between the battery cell 300 and the heat conducting plate 210 is increased, so that the heat conducting plate 210 can easily guide the heat dissipated by the battery cell 300 and ensure the heat dissipation efficiency of the battery cell 300. At the same time, the heat conducting plate 210 can also isolate the two adjacent battery cells 300, eliminating the need to set other protective materials between the two adjacent battery cells 300, thereby reducing the probability of thermal runaway of the battery cell 300.

[0048] In some specific embodiments of the present invention, refer to Figure 4 , each battery cell 300 is provided with a tab 310 on its small face. The tabs 310 are respectively provided on two small faces in the length direction of each battery cell 300 to facilitate connection and assembly.

[0049] In some specific embodiments of the present invention, refer to Figure 4, a pole piece 320 is provided at each end of the multiple battery cells 300, and the pole piece 320 is connected to the pole ear 310. One end of the pole piece 320 is bent away from the battery cell 300 and extends to the box body 110 or the longitudinal beam 130. Among the multiple battery cells 300 in each accommodating cavity, a pole piece 320 is provided on one of the small faces in the body length direction of two battery cells 300 arranged on both sides in the body width direction close to the box body 110. One end of the pole piece 320 is fixedly provided on the small face of the corresponding battery cell 300, and the other end is bent and extended in the direction away from the battery cell 300, so that the end of the pole piece 320 away from the battery cell 300 can be supported on the outer wall of the box body 110 or the outer wall of the longitudinal beam 130, which is convenient for connection and use.

[0050] 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 battery heat dissipation structure, characterized in that: include: A mounting portion (100), wherein a receiving cavity is provided in the mounting portion (100); A plurality of battery cells (300) are sequentially arranged and distributed in the accommodating cavity; An air duct is also provided in the mounting portion (100); A heat conducting portion (200), wherein the heat conducting portion (200) is provided with a plurality of evaporation ends and a plurality of condensation ends; A plurality of evaporation ends are respectively arranged between each two adjacent battery cells (300), and each condensation end is inserted into the air duct.

2. The battery heat dissipation structure according to claim 1, characterized in that: There are multiple accommodating cavities, and the multiple accommodating cavities are arranged in sequence; The air duct is extended along the arrangement direction of the plurality of accommodating cavities.

3. The battery heat dissipation structure according to claim 2, characterized in that: The mounting portion (100) comprises: A box body (110), wherein a plurality of longitudinal beams (130) are arranged in the box body (110); A bottom guard plate (120), the bottom guard plate (120) being arranged on one side of the box body (110), and the air duct being arranged in the bottom guard plate (120); The box body (110), the longitudinal beam (130) and the bottom guard plate (120) are combined to form a plurality of accommodating cavities.

4. The battery heat dissipation structure according to claim 3, characterized in that: The bottom guard plate (120) is a profile plate.

5. The battery heat dissipation structure according to claim 3, characterized in that: The heat conducting portion (200) comprises: a heat conducting plate (210), wherein the heat conducting plates (210) are multiple, and the multiple heat conducting plates (210) are respectively arranged between each two adjacent battery cells (300); A heat pipe (220), wherein the heat pipe (220) is multiple, and the multiple heat pipes (220) are arranged in a one-to-one correspondence with the multiple heat conducting plates (210); One end of the heat pipe (220) forms the evaporation end and is connected to the heat conducting plate (210), and the other end of the heat pipe (220) forms the condensation end and is inserted into the air duct.

6. The battery heat dissipation structure according to claim 5, characterized in that: The evaporation end of the heat pipe (220) is arranged along the outer side of the heat conducting plate (210) and wrapped around the heat conducting plate (210).

7. The battery heat dissipation structure according to claim 5, characterized in that: The condensation end of the heat pipe (220) is provided with a fin (230).

8. The battery heat dissipation structure according to any one of claims 5 to 7, characterized in that: The large surfaces of each two adjacent battery cells (300) are arranged facing each other; The heat conducting plate (210) is sandwiched between the large surfaces of the two corresponding battery cells (300).

9. The battery heat dissipation structure according to claim 8, characterized in that: A tab (310) is provided on the small face of each battery cell (300).

10. The battery heat dissipation structure according to claim 9, characterized in that: Both ends of the plurality of battery cells (300) are respectively provided with pole pieces (320), the pole pieces (320) are connected to the pole tabs (310), and one end of the pole piece (320) is bent in a direction away from the battery cell (300) and extends to the box (110) or the longitudinal beam (130).

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