Battery module with high heat exchange efficiency

Abstract

The utility model discloses a battery module with high heat exchange efficiency, which comprises a shell, a plurality of battery cells are arranged in the shell, the plurality of battery cells are divided into a plurality of groups, a gap is reserved between two adjacent groups of battery cells to form a heat dissipation main channel, and at least one end of the heat dissipation main channel is provided with a current collecting cover. And a fan communicated with the flow collecting cover is arranged on the shell. According to the utility model, by arranging the heat dissipation main channel and the current collecting cover, cold air uniformly flows through each battery cell, so that the heat exchange efficiency is remarkably improved, local overheating is prevented, and the heat dissipation effect is improved. In addition, the heat dissipation main channel is formed by gaps reserved in the battery cell group, no additional heat dissipation channel needs to be arranged, the structure is simple, and the cost is saved. In addition, the flow collecting cover enhances the centrality and directionality of air flow, reduces energy loss, and further improves the heat dissipation effect. The heat dissipation mechanism of the battery module is high in heat dissipation efficiency, the service life of the battery module is guaranteed, and the overall operation stability and safety of an energy storage system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery pack heat dissipation, and more specifically, to a battery module with high heat exchange efficiency. Background Art

[0002] As battery energy density continues to increase and application scenarios have increasingly stringent performance requirements, the heat generated by battery modules during operation has become increasingly prominent. In order to effectively manage this heat and prevent battery overheating from causing performance degradation or even safety risks, most battery module designs use air cooling. Figure 1 As shown, fans are installed at both ends of the battery module shell, one end serves as an air inlet to blow in cold air, and the other end serves as an air outlet to draw out hot air, thereby forming air circulation in the shell, accelerating gas flow, and promoting heat dissipation to a certain extent, providing basic heat dissipation guarantee for the battery module.

[0003] However, since the gas often flows randomly inside the shell, it is impossible to ensure that every cell surface can evenly and effectively receive cooling air. Especially in battery modules with closely arranged cells and limited space, some cells may not be able to fully contact the cooling air, resulting in local overheating, which in turn affects the performance stability and service life of the entire battery module.

[0004] The above shortcomings need to be improved. Summary of the invention

[0005] In order to solve or alleviate the problems of uneven heat dissipation and low heat dissipation efficiency of existing battery modules, the utility model provides a battery module with high heat exchange efficiency.

[0006] The technical solution of the utility model is as follows:

[0007] A battery module with high heat exchange efficiency comprises a shell, in which a plurality of battery cells are arranged, the plurality of battery cells are divided into a plurality of groups, gaps are left between two adjacent groups of battery cells to form a heat dissipation channel, at least one end of the heat dissipation channel is provided with a collecting cover, and the shell is provided with a fan connected to the collecting cover.

[0008] Furthermore, a heat dissipation branch is provided between adjacent battery cells, and the heat dissipation branch is connected to the heat dissipation main channel.

[0009] Furthermore, a heat dissipation plate is provided in the heat dissipation branch, a heat dissipation channel is provided on the heat dissipation plate along the airflow direction of the heat dissipation branch, and a surface of the heat dissipation plate is in contact with a surface of an adjacent battery cell.

[0010] Furthermore, reinforcing ribs and heat dissipation fins are provided in the heat dissipation channel.

[0011] Furthermore, air inlets are provided on both sides of the shell, and the air inlets are directly opposite to the ends of the heat dissipation plate.

[0012] Furthermore, the collecting cover includes a first air outlet connected to the fan and a second air outlet connected to the heat dissipation trunk channel, and a ventilation area of ​​the first air outlet is not less than a ventilation area of ​​the second air outlet.

[0013] Furthermore, the collector is provided with a first connection hole on one side of the first air outlet, the first connection hole is connected to the shell, and the collector is provided with a second connection hole on one side of the second air outlet, the second connection hole is connected to the fan.

[0014] Furthermore, a fan is provided at one end of the heat dissipation trunk channel, and the fan is an exhaust fan.

[0015] Furthermore, fans are provided at both ends of the heat dissipation trunk channel, the fan at the first end of the heat dissipation trunk channel is an exhaust fan, and the fan at the second end of the heat dissipation trunk channel is a blower fan.

[0016] Furthermore, a gap is left between the battery core and the shell.

[0017] The utility model according to the above scheme has the beneficial effect that the utility model limits the flow path of cold air by setting a heat dissipation main channel and a collector, so that the cold air flows evenly through each battery cell, significantly improving the heat exchange efficiency, preventing local overheating, and improving the heat dissipation effect. In addition, the heat dissipation main channel is formed by the gap left by the battery cell group, and there is no need to set up an additional heat dissipation channel, which has a simple structure and saves costs. In addition, the collector enhances the concentration and directionality of air flow, reduces energy loss, and further improves the heat dissipation effect. The heat dissipation mechanism of the battery module has high heat dissipation efficiency, ensures the service life of the battery module, and improves the overall operation stability and safety of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of the prior art;

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 3 It is a schematic diagram of the internal structure of the utility model;

[0022] Figure 4 This is a front structural schematic diagram of the wind guide cover in the utility model;

[0023] Figure 5 This is a schematic diagram of the back structure of the wind guide cover in the utility model

[0024] Figure 6 It is a structural schematic diagram of the heat dissipation plate in the utility model.

[0025] Among them, the reference numerals in the figure are: 1, shell; 101, air inlet; 2, battery cell; 3, heat dissipation main channel; 4, collecting cover; 401, first air outlet; 402, second air outlet; 403, first connecting hole; 404, second connecting hole; 5, fan; 6, heat dissipation branch; 7, heat sink; 701, reinforcement rib; 702, heat dissipation fin. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] It should be noted that when a component is referred to as being "fixed" or "set" or "connected" to another component, it may be located directly or indirectly on the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and should not be construed as limitations on the present technical solution. The terms "first", "second", etc. are only used for the convenience of description and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0028] like Figures 2 to 5 As shown, a battery module with high heat exchange efficiency described in one embodiment of the utility model includes a shell 1, in which a plurality of battery cells 2 are arranged, the plurality of battery cells 2 are divided into a plurality of groups, and a gap is left between two adjacent groups of battery cells 2 to form a heat dissipation channel 3, a collecting cover 4 is arranged at least at one end of the heat dissipation channel 3, and a fan 5 connected to the collecting cover 4 is arranged on the shell 1.

[0029] Fans 5 are provided at both ends of the heat dissipation channel 3. The fan 5 at the first end of the heat dissipation channel 3 is an exhaust fan, and the fan 5 at the second end of the heat dissipation channel 3 is a blowing fan.

[0030] During the operation of the battery module, the fan 5 is started to draw the external cold air into the housing 1, and the cold air is collected through the collector 4, and then enters the heat dissipation channel 3 from the first end of the heat dissipation channel 3. The heat dissipation channel 3 is arranged between two adjacent groups of battery cells 2 to ensure that the cooling air can directly and evenly flow through the surface of each battery cell 2. As the air flows in the heat dissipation channel 3, the heat generated by the battery cell 2 during operation is effectively absorbed, and then the air is collected from the second end of the heat dissipation channel 3 through another collector 4, and is drawn out of the housing 1 by the fan 5 to complete the heat release.

[0031] The battery module is provided with a heat dissipation channel 3 and a collector 4 to limit the flow path of the cold air, so that the cold air flows evenly through each battery cell 2, significantly improving the heat exchange efficiency, preventing local overheating, and improving the heat dissipation effect. In addition, the heat dissipation channel 3 is formed by the gap left by the battery cell 2 group, and there is no need to set up additional heat dissipation pipes, which has a simple structure and saves costs. In addition, the collector 4 enhances the concentration and directionality of the air flow, reduces energy loss, and further improves the heat dissipation effect. The heat dissipation system of the battery module has high heat dissipation efficiency, ensures the service life of the battery module, and improves the overall operation stability and safety of the energy storage system.

[0032] In practical application, a fan 5 can be provided at one end of the heat dissipation channel 3. The fan 5 is an exhaust fan, which can also improve the heat dissipation effect. The fans 5 at both ends of the heat dissipation channel 3 can be provided according to comprehensive considerations such as heat dissipation requirements, layout space, and production costs.

[0033] like Figure 3 As shown, in a preferred embodiment, a heat dissipation branch 6 is provided between adjacent battery cells 2 , and the heat dissipation branch 6 is connected to the heat dissipation main channel 3 .

[0034] The heat dissipation branch 6 serves as an auxiliary channel and is interconnected with the heat dissipation main channel 3 to form a heat dissipation network. When the fan 5 is started, the external cold air enters the heat dissipation main channel 3 through the collector 4 and flows rapidly therein. At the same time, part of the cold air will flow into the heat dissipation branch 6 and into the space between the battery cells 2, thereby increasing the contact area between the cold air and the battery cells 2. In the heat dissipation branch 6, the cold air exchanges heat by contacting the surface of the battery cell 2, and after absorbing heat, it is then merged into the heat dissipation main channel 3 or directly flows to the air outlet through other paths.

[0035] In this embodiment, by adding a heat dissipation branch 6 and connecting it to the heat dissipation main channel 3, the heat exchange efficiency between the air and the battery cell 2 is improved, so that heat can be transferred from the inside of the battery cell 2 to the outside more quickly and quickly discharged through the heat dissipation system, effectively reducing the operating temperature of the battery module.

[0036] like Figure 3 and Figure 6As shown, in a preferred embodiment, a heat sink 7 is provided in the heat sink branch 6 , a heat sink 7 is provided with a heat sink channel along the airflow direction of the heat sink branch 6 , and a surface of the heat sink 7 is in contact with a surface of an adjacent battery cell 2 .

[0037] Reinforcement ribs 701 and heat dissipation fins 702 are provided in the heat dissipation channel.

[0038] The surface of the heat sink 7 is closely attached to the surface of the adjacent battery cell 2. On the one hand, the battery cell 2 exchanges heat with the heat sink 7, and on the other hand, it supports two adjacent battery cells 2 to maintain the distance between the battery cells 2. The cold air flows in the heat dissipation branch 6 through the heat dissipation channel of the heat sink 7 and exchanges heat with the heat sink 7. The reinforcing ribs 701 not only improve the structural strength of the heat sink 7, but also increase the heat exchange area. At the same time, the heat dissipation fins 702 also increase the contact area with the air, so that the heat can be taken away more quickly.

[0039] like Figure 2 and Figure 3 As shown, in a preferred embodiment, air inlets 101 are provided on both sides of the housing 1 , and the air inlets 101 are directly opposite to the ends of the heat dissipation plate 7 .

[0040] When fan 5 is started, the airflow Figure 3 In the direction of the middle arrow, external cold air is sucked into the shell 1 through the air inlets 101 on both sides of the shell 1, and then enters the heat dissipation channel inside the heat dissipation plate 7 to fully exchange heat with the heat dissipation plate 7.

[0041] In this embodiment, by opening air inlets 101 on both sides of the shell 1 facing the ends of the heat sink 7, the air intake volume is increased on the one hand, and the air intake path can be shortened on the other hand, reducing energy loss, thereby optimizing the heat dissipation performance of the battery module.

[0042] like Figure 4 and Figure 5 As shown, in a preferred embodiment, the collecting cover 4 includes a first air outlet 401 connected to the fan 5 and a second air outlet 402 connected to the heat dissipation channel 3, and the ventilation area of ​​the first air outlet 401 is not less than the ventilation area of ​​the second air outlet 402.

[0043] The collector 4 is provided with a first connection hole 403 on one side of the first air outlet 401 , and the first connection hole 403 is connected to the housing 1 . The collector 4 is provided with a second connection hole 404 on one side of the second air outlet 402 , and the second connection hole 404 is connected to the fan 5 .

[0044] The first air outlet 401 of the collector 4 is connected to the fan 5, and the second air outlet 402 is connected to the heat dissipation trunk 3, which is used to draw external cold air into the heat dissipation trunk 3 or blow the hot air flow after heat exchange out of the heat dissipation trunk 3. In particular, the ventilation area of ​​the first air outlet 401 is not less than the ventilation area of ​​the second air outlet 402, so that the first air outlet 401 can be arranged with multiple fans 5 or large-diameter fans 5 to provide sufficient air flow to meet the heat dissipation requirements. At the same time, the collector 4 can be firmly connected to the housing 1 through the first connection hole 403, and connected to the fan 5 through the second connection hole 404, which ensures the stability of the structure and facilitates installation and maintenance.

[0045] like Figure 3 As shown, in a preferred embodiment, a gap is left between the battery core 2 and the housing 1 .

[0046] When the fan 5 is started, cold air enters the housing 1 through the air inlet 101, and mainly flows along the heat dissipation branch 6 and the heat dissipation main channel 3. Part of the air will escape into the gap between the battery cell 2 and the housing 1, exchange heat with the battery cell 2, and absorb the heat generated by the battery cell 2. Subsequently, the hot air can be discharged through the collector 4 and the hot air flow in the heat dissipation main channel 3. The gap between the battery cell 2 and the housing 1 increases the contact area between the air and the battery cell 2, and promotes the rapid transfer and dissipation of heat.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery module with high heat exchange efficiency, characterized in that: It comprises a shell, in which a plurality of battery cells are arranged, the plurality of battery cells are divided into a plurality of groups, a gap is left between two adjacent groups of battery cells to form a heat dissipation channel, at least one end of the heat dissipation channel is provided with a collecting cover, and the shell is provided with a fan connected to the collecting cover.

2. A battery module with high heat exchange efficiency according to claim 1, characterized in that: A heat dissipation branch is provided between adjacent battery cells, and the heat dissipation branch is communicated with the heat dissipation trunk.

3. A battery module with high heat exchange efficiency according to claim 2, characterized in that: A heat dissipation plate is arranged in the heat dissipation branch, a heat dissipation channel is arranged on the heat dissipation plate along the airflow direction of the heat dissipation branch, and a surface of the heat dissipation plate is in contact with a surface of an adjacent battery cell.

4. A battery module with high heat exchange efficiency according to claim 3, characterized in that: The heat dissipation channel is provided with reinforcing ribs and heat dissipation fins.

5. A battery module with high heat exchange efficiency according to claim 3, characterized in that: Air inlets are provided on both sides of the shell, and the air inlets are directly opposite to the ends of the heat dissipation plate.

6. A battery module with high heat exchange efficiency according to claim 1, characterized in that: The collecting cover comprises a first air outlet communicated with the fan and a second air outlet communicated with the heat dissipation trunk channel, and a ventilation area of ​​the first air outlet is not less than a ventilation area of ​​the second air outlet.

7. A battery module with high heat exchange efficiency according to claim 6, characterized in that: The collector is provided with a first connection hole on one side of the first air outlet, and the first connection hole is connected to the shell. The collector is provided with a second connection hole on one side of the second air outlet, and the second connection hole is connected to the fan.

8. A battery module with high heat exchange efficiency according to claim 1, characterized in that: A fan is arranged at one end of the heat dissipation trunk channel, and the fan is an exhaust fan.

9. A battery module with high heat exchange efficiency according to claim 1, characterized in that: Fans are provided at both ends of the heat dissipation trunk channel. The fan at the first end of the heat dissipation trunk channel is an exhaust fan, and the fan at the second end of the heat dissipation trunk channel is a blowing fan.

10. A battery module with high heat exchange efficiency according to claim 1, characterized in that: A gap is left between the battery core and the shell.

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