Battery module with high cooling efficiency, battery and equipment

Abstract

The utility model relates to the technical field of batteries, in particular to a battery module with high cooling efficiency, a battery and equipment, which comprises a battery cell group and cooling components, the cooling components are arranged on two sides of the battery cell group and connected with the battery cell group, and cooling channels for cooling media to flow are arranged in the cooling components. Discontinuous fins which are arranged at intervals are arranged in the cooling channel; therefore, the fins are arranged in the cooling channel, the fins are divided into a plurality of discontinuous sections by the oblique notches in the fins, the cooling channel is divided into a plurality of sub-flow channels by the fins, when the cooling medium flows through the oblique notches, flowing dispersion can be generated, and the cooling medium is mixed with cooling media in other sub-flow channels, so that the temperature of the cooling medium is balanced, and the service life of the cooling medium is prolonged. Therefore, uniform cooling of the whole surface is realized, and the problem of local overheating or insufficient cooling of the battery is avoided. And the contact area between the cooling medium and the fins is also increased, the temperature consistency is high, and the heat dissipation and cooling efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery module, a battery and a device with high cooling efficiency. Background Art

[0002] Lithium-ion batteries have the advantages of high energy density, low self-discharge rate, long life and no memory effect, and are widely used in electric vehicles and other fields; however, lithium batteries are very sensitive to temperature. Too high battery temperature will reduce battery performance and even cause thermal runaway, while too low battery temperature will shorten battery range and battery life. In addition, large temperature differences will also have an adverse effect on battery stability.

[0003] In order to prevent the performance of the battery from being affected by temperature, most liquid cooling solutions are used to provide efficient, stable and lightweight heat dissipation for the battery, which helps to improve the performance and safety of the battery system. For example, the patent application with publication number CN219106291U discloses a battery module and a battery. The liquid-cooled side plates in the disclosed technical solution all adopt a harmonica tube-like design. The harmonica tube is a representative of a straight flow channel. The straight flow channel liquid-cooled side plate directly contacts the lithium battery and sets a flow channel inside it, so that the cooling medium flows through the heat source component to absorb heat. Subsequently, the cooling medium with heat flows out of the straight channel liquid-cooled side plate and enters the cooling system for heat dissipation. The cooled liquid circulates through the straight channel liquid-cooled side plate again. This cycle continuously removes heat from the lithium battery, reduces the operating temperature of the lithium battery, and improves performance and reliability.

[0004] Although the above technical solution can dissipate heat from the battery to a certain extent, the shape of the harmonica tube is relatively uniform, and the improvement effect of convective heat transfer is limited when the fluid flows inside it; and a straight flow channel may more easily form a thermal boundary layer, resulting in an increase in the resistance of convective heat transfer, affecting the heat dissipation effect.

[0005] It should be noted that the information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as an admission or suggestion in any form that the information constitutes prior art already known to a person skilled in the art. Utility Model Content

[0006] In order to solve the technical problem that the conventional liquid-cooled side plate has poor heat dissipation effect, the utility model provides a battery module with high cooling efficiency, the battery module includes a battery cell group;

[0007] A cooling component is arranged on both sides of the battery cell group and connected to the battery cell group. A cooling channel for the flow of cooling medium is provided in the cooling component. Discontinuous fins arranged at intervals from each other are provided in the cooling channel. The fins divide the cooling channel into a plurality of sub-channels.

[0008] Furthermore, the arrangement direction of the fins is the same as the arrangement direction of the cooling channels.

[0009] Furthermore, the cooling assembly includes a liquid-cooled side plate, a first connecting member and a second connecting member, the liquid-cooled side plate is connected to the battery cell group, the cooling channel is located inside the liquid-cooled side plate, the first connecting member is provided with a liquid filling port, the second connecting member is provided with a liquid outlet, the first connecting member is connected to one end of the liquid-cooled side plate, and the second connecting member is connected to the other end of the liquid-cooled side plate.

[0010] Furthermore, a first liquid storage tank is provided in the first connecting member, a second liquid storage tank is provided in the second connecting member, the liquid injection port is connected to the cooling channel through the first liquid storage tank, and the liquid outlet is connected to the cooling channel through the second liquid storage tank.

[0011] Furthermore, the width of the first liquid storage tank and the second liquid storage tank is equal to the width of the cooling channel.

[0012] Furthermore, the liquid injection port and the liquid outlet are symmetrically arranged, and the first liquid storage tank and the second liquid storage tank are symmetrically arranged.

[0013] Furthermore, the first connecting member and the second connecting member are L-shaped.

[0014] Furthermore, the cooling channel is S-shaped.

[0015] The utility model also provides a battery, comprising at least one battery module with high cooling efficiency as described in any one of the above items.

[0016] The utility model also provides a device, comprising the battery as described above.

[0017] Based on the above, the utility model provides a battery module, battery and equipment with high cooling efficiency. Compared with the prior art, by setting fins in the cooling channel, the oblique cuts on the fins divide the fins into multiple discontinuous sections, and the fins divide the cooling channel into several sub-channels. When the cooling medium flows through the oblique cuts, it can produce flow dispersion and mix with the cooling medium in other sub-channels to balance the temperature of the cooling medium, thereby achieving uniform cooling of the entire surface and avoiding the problem of local overheating or insufficient cooling of the battery. It also increases the contact area between the cooling medium and the fins, with high temperature consistency and high heat dissipation and cooling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the embodiments or the prior art descriptions. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work. The positional relationship described in the drawings in the following description is based on the direction of the components in the drawings unless otherwise specified.

[0019] Figure 1 A schematic structural diagram of a highly cooled battery module provided by an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of the structure of a cooling assembly provided in one embodiment of the utility model;

[0021] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0022] Figure 4 for Figure 3 Schematic diagram of the enlarged structure at N in the figure.

[0023] Reference numerals:

[0024] 10-battery cell group 20-cooling assembly 30-fin

[0025] 40-liquid injection port 50-liquid outlet 60-first liquid storage tank

[0026] 70-second liquid storage tank 21-liquid cooling side plate 22-first connecting piece

[0027] 23- second connecting piece 31- oblique cut DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof all mean "at least including".

[0030] See also Figure 1 and Figure 2 , Figure 1 A schematic structural diagram of a highly cooled battery module provided by an embodiment of the utility model; Figure 2 A schematic structural diagram of a cooling assembly provided in one embodiment of the utility model.

[0031] In order to solve the technical problem of poor heat dissipation effect of the conventional liquid-cooled side plate, or to achieve at least one of the above advantages or other advantages, an embodiment of the utility model provides a battery module with high cooling efficiency. As shown in the figure, the battery module includes a battery cell group 10 and a cooling assembly 20;

[0032] The cooling assembly 20 is arranged on both sides of the battery cell group 10 and connected to the battery cell group 10. In a specific implementation, two groups of cooling assemblies 20 are included, which are arranged on both sides of the battery cell group 10. It can be understood that the battery cell group 10 is composed of a plurality of battery cells arranged and combined, and the setting position of the cooling assembly 20 should be adjusted according to the arrangement direction and arrangement mode of the battery cells. For example, if the battery cells are arranged longitudinally, the cooling assembly 20 is arranged on the left and right sides of the battery cell group 10, so that each battery cell is in contact with the cooling assembly 20 to improve the heat dissipation consistency.

[0033] See also Figure 3 and Figure 4 As shown in the figure, a cooling channel for cooling medium to flow is provided inside the cooling assembly 20, and discontinuous fins 30 arranged at intervals are provided in the cooling channel, and the fins 30 divide the cooling channel into a plurality of sub-channels. Preferably, the cooling channel is S-shaped.

[0034] Specifically, the fin 30 is provided with a plurality of oblique cuts 31, which divide the fin 30 into multiple discontinuous sections. When the cooling medium flows through the oblique cuts 31, the cooling medium generates flow dispersion and mixes with the cooling medium in other sub-channels to balance the temperature of the cooling medium, thereby achieving uniform cooling of the entire surface of the battery cell group 10, avoiding the problem of local overheating or insufficient cooling. At the same time, the contact area between the cooling medium and the fin 30 is increased, further improving the heat transfer effect.

[0035] Preferably, the setting direction of the fin 30 is the same as the setting direction of the cooling channel, that is, the cooling channel is linear, S-shaped, etc., and the fin 30 also adopts a corresponding linear or S-shaped shape, etc., corresponding to the cooling channel.

[0036] On the basis of the above, the cooling assembly 20 includes a liquid cooling side plate 21, a first connector 22 and a second connector 23. The liquid cooling side plate 21 is connected to the battery cell group 10. Preferably, a thermal conductive glue or a thermal conductive pad is provided between the liquid cooling side plate 21 and the battery cell group 10 to improve the thermal conductivity efficiency.

[0037] A cooling channel for the flow of cooling medium is provided inside the liquid-cooled side plate 21. One end of the liquid-cooled side plate 21 is connected to the first connecting member 22, and the other end of the liquid-cooled side plate 21 is connected to the second connecting member 23. A liquid injection port 40 is provided on the first connecting member 22, and a liquid outlet 50 is provided on the second connecting member 23. The cooling medium can flow into the cooling channel through the liquid injection port 40 and flow out from the liquid outlet 50.

[0038] In some preferred embodiments, a first liquid storage tank 60 is provided in the first connecting member 22, a second liquid storage tank 70 is provided in the second connecting member 23, the liquid injection port 40 is connected to the cooling channel through the first liquid storage tank 60, and the liquid outlet 50 is connected to the cooling channel through the second liquid storage tank 70.

[0039] In specific implementation, the width of the first liquid storage tank 60 and the second liquid storage tank 70 is equal to the width of the cooling channel. When the cooling medium is injected from the liquid injection port 40, it flows through the first liquid storage tank 60 and then enters the cooling channel. At this time, the cooling medium liquid levels in the first liquid storage tank 60 and the cooling channel are consistent. When the liquid level reaches the top of the first liquid storage tank 60, the cooling medium liquid levels in each sub-channel will maintain the same height and rise to ensure the uniform distribution of the cooling medium in each sub-channel.

[0040] Preferably, the liquid injection port 40 and the liquid outlet 50 are symmetrically arranged, and the first liquid storage tank 60 and the second liquid storage tank 70 are symmetrically arranged.

[0041] It should be noted that the functions of the liquid injection port 40 and the liquid outlet port 50 can be flexibly exchanged according to the actual situation of the battery module, that is, when the top of the battery module has a large amount of heat and a poor heat dissipation capacity, the cooling medium can be injected from the liquid outlet port 50. At this time, the cooling medium first flows through the top to dissipate heat and then flows out through the liquid injection port 40. If the bottom of the battery module has a large amount of heat and a large heat dissipation capacity, the opposite is true.

[0042] In some preferred embodiments, the first connector 22 and the second connector 23 are L-shaped, so as to facilitate the arrangement of the coolant pipeline and the high and low pressure wiring harnesses while ensuring the volume of the first liquid reservoir 60 and the second liquid reservoir 70.

[0043] In some preferred embodiments, the present invention further provides a battery, comprising at least one battery module with high cooling efficiency as described in any one of the above items.

[0044] In some preferred embodiments, the utility model further provides a device, which comprises the above-mentioned battery for power supply.

[0045] In summary, the utility model provides a battery module, battery and equipment with high cooling efficiency. Compared with the prior art, by arranging fins in the cooling channel, the oblique cuts on the fins divide the fins into multiple discontinuous sections, and the fins divide the cooling channel into several sub-channels. When the cooling medium flows through the oblique cuts, it can produce flow dispersion and mix with the cooling medium in other sub-channels to balance the temperature of the cooling medium, thereby achieving uniform cooling of the entire surface, avoiding the problem of local overheating or insufficient cooling, and having high temperature consistency. It also increases the contact area between the cooling medium and the fins, and has high heat dissipation and cooling efficiency.

[0046] Although the terms such as battery pack, liquid cooling side plate, fin, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

[0047] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the utility model can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A battery module with high cooling efficiency, characterized in that: include: Battery cell group; A cooling component is arranged on both sides of the battery cell group and connected to the battery cell group. A cooling channel for the flow of cooling medium is provided in the cooling component. Discontinuous fins arranged at intervals from each other are provided in the cooling channel. The fins divide the cooling channel into a plurality of sub-channels.

2. The battery module with high cooling efficiency according to claim 1, characterized in that: The arrangement direction of the fins is the same as the arrangement direction of the cooling channels.

3. The battery module with high cooling efficiency according to claim 1, characterized in that: The cooling assembly includes a liquid-cooled side plate, a first connecting member and a second connecting member. The liquid-cooled side plate is connected to the battery cell group. The cooling channel is located inside the liquid-cooled side plate. The first connecting member is provided with a liquid injection port, and the second connecting member is provided with a liquid outlet. The first connecting member is connected to one end of the liquid-cooled side plate, and the second connecting member is connected to the other end of the liquid-cooled side plate.

4. The battery module with high cooling efficiency according to claim 3, characterized in that: A first liquid storage tank is provided in the first connecting member, a second liquid storage tank is provided in the second connecting member, the liquid injection port is connected to the cooling channel through the first liquid storage tank, and the liquid outlet is connected to the cooling channel through the second liquid storage tank.

5. The battery module with high cooling efficiency according to claim 4, characterized in that: The width of the first liquid storage tank and the second liquid storage tank is equal to the width of the cooling channel.

6. The battery module with high cooling efficiency according to claim 4, characterized in that: The liquid injection port and the liquid outlet are symmetrically arranged, and the first liquid storage tank and the second liquid storage tank are symmetrically arranged.

7. The battery module with high cooling efficiency according to claim 3, characterized in that: The first connecting member and the second connecting member are L-shaped.

8. The battery module with high cooling efficiency according to claim 1, characterized in that: The cooling channel is S-shaped.

9. A battery, characterized in that: The invention comprises at least one battery module with high cooling efficiency as claimed in any one of claims 1 to 8.

10. A device, characterized in that: Comprising the battery as claimed in claim 9.

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