An energy storage device

Abstract

This invention discloses an energy storage device, including a battery module and a temperature regulation device. The battery module includes a housing, battery components, and a ventilation circulation system. The battery components are disposed within the housing. The ventilation circulation system includes a ventilation circuit and a return air circuit. The ventilation circuit runs through the battery module and is used to heat or cool the battery module. The return air circuit surrounds the battery module and is used for secondary heating or cooling of the battery module. The temperature regulation device is installed on the outside of the housing and is used to deliver hot or cold air into the ventilation circulation system. This invention aims to solve the problem of uneven heat dissipation or heating in existing energy storage devices, which affects the service life of the battery module.

Description

Technical Field

[0001] This invention relates to the field of energy storage device technology, and particularly to the field of heat dissipation technology for energy storage devices, specifically to an energy storage device. Background Technology

[0002] Temperature is a crucial factor affecting battery performance and lifespan. During charging and discharging, battery modules inevitably generate heat. Therefore, in the battery industry, internal cooling fans are typically incorporated into battery modules to improve heat dissipation efficiency. Battery modules usually contain multiple cell groups, each consisting of multiple cells.

[0003] The existing wall-mounted energy storage device's cooling / heating process for the entire battery compartment is as follows: first, the air surrounding the battery module is cooled / heated, and the battery module is heated or cooled through airflow. The heating / heating effect is obvious in the parts closer to the air conditioning inlet, while the parts far from the air conditioning return vent are prone to airflow dead zones, forming heat accumulation. The overall airflow of the battery compartment is poor, which can easily cause localized excessively high ambient temperature. The temperature of the battery modules surrounding it will be higher than that of other battery modules, resulting in a large temperature difference inside the battery modules and affecting the battery module's lifespan. Summary of the Invention

[0004] The main objective of this invention is to propose an energy storage device that addresses the problem of uneven heat dissipation or heating in existing energy storage devices, which affects the lifespan of battery modules.

[0005] To achieve the above objectives, the present invention provides an energy storage device comprising:

[0006] A battery module includes a housing, a battery assembly, and a ventilation circulation system. The battery assembly is disposed within the housing. The ventilation circulation system includes a ventilation circuit and a return air circuit. The ventilation circuit extends through the battery module and is used to heat or cool the battery module. The return air circuit surrounds the battery module and is used for secondary heating or cooling of the battery module.

[0007] A temperature regulating device is installed on the outside of the housing, and the temperature regulating device is used to send hot air or cold air into the air circulation system.

[0008] Optionally, the battery assembly includes multiple battery cells;

[0009] The battery module also includes a battery rack, which is disposed within the housing. The battery rack has multiple battery mounting cavities, and each battery cell is installed in each of the battery mounting cavities.

[0010] Optionally, the battery rack may be made of aluminum alloy.

[0011] Optionally, the temperature regulating device has a first air inlet and a first air outlet.

[0012] The battery module has a first end close to the temperature regulating device and a second end away from the temperature regulating device;

[0013] In the first end direction, an air inlet channel is formed between the battery assembly and the inner sidewall of the housing, and the air inlet channel is connected to the first air outlet;

[0014] In the second end direction, an air outlet channel is formed between the battery assembly and the inner wall of the housing;

[0015] A gap passage is formed between the battery assembly and the battery rack, and the gap passage connects the air inlet channel and the air outlet channel;

[0016] The ventilation path includes the air inlet duct, the air outlet duct, and the gap passage.

[0017] Optionally, each of the battery mounting cavities has an opening at both ends facing the first end and the second end, the opening being used to connect the air inlet channel and the air outlet channel.

[0018] Optionally, the first air inlet and the first air outlet are formed on the same side of the temperature regulating device, and a partition is provided between the first air inlet and the first air outlet.

[0019] Optionally, the battery module further has a third end and a fourth end located between the first end and the second end and disposed opposite to each other;

[0020] The housing has a first air duct formed in the side wall at the third end direction, and the first air duct is connected to the air outlet channel;

[0021] A second air duct is formed in the side wall of the housing located at the fourth end direction, and the second air duct is connected to the air outlet channel;

[0022] The housing has a third air duct formed in the side wall at the first end direction, and the third air duct connects the first air duct and the second air duct;

[0023] The return air path includes the first air duct, the second air duct, and the third air duct.

[0024] Optionally, a second air outlet is formed on the third air duct, and the second air outlet is connected to the first air outlet.

[0025] Optionally, the first air duct includes a plurality of first pipes and a plurality of second pipes, the plurality of first pipes being spaced apart, and each second pipe being disposed between two first pipes for connecting the plurality of first pipes.

[0026] Optionally, the temperature regulating device includes an air conditioner.

[0027] In this invention, a battery module is housed within the casing. The ventilation duct and the return air duct simultaneously heat or cool the battery module, complementing each other. This ensures that the hot or cold air supplied by the temperature regulating device permeates the entire casing, effectively cooling or heating the entire battery module. This helps prevent "airflow dead zones" from forming near battery modules that are far from the temperature regulating device, leading to poor overall airflow within the casing, heat accumulation, and locally high ambient temperatures. This results in larger temperature differences among the battery modules in these areas, impacting the cycle life of the energy storage device. During actual heating or cooling, the ventilation duct directly contacts the battery module for heating or cooling; the return air duct surrounds the battery module, providing secondary heating or cooling. This arrangement ensures uniform heating of the entire battery module, preventing localized overheating and ensuring even temperature distribution, which would negatively impact the battery module's energy supply efficiency. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A schematic diagram of an embodiment of the energy storage device provided by the present invention;

[0030] Figure 2 for Figure 1 Top view of the energy storage device;

[0031] Figure 3 for Figure 1 A schematic diagram of the structure of the first air duct in the middle.

[0032] Explanation of icon numbers:

[0033]

[0034]

[0035] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0038] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0039] Temperature is a crucial factor affecting battery performance and lifespan. During charging and discharging, battery modules inevitably generate heat. Therefore, in the battery industry, internal circulation fans are typically installed within the battery module to improve heat dissipation efficiency. A battery module usually contains multiple cell groups, each composed of multiple cells. Current wall-mounted energy storage devices cool / heat the entire battery compartment by first cooling / heating the air surrounding the battery module. Airflow then heats or cools the battery module. The heating / cooling effect is most pronounced in areas closer to the air inlet, while areas farther from the air outlet are prone to airflow dead zones, leading to heat accumulation. Poor overall airflow within the battery compartment can cause localized overheating, resulting in the battery modules within the compartment being hotter than others. This creates significant internal temperature differences within the battery modules, impacting their lifespan.

[0040] In view of this, the present invention provides an energy storage device. Figure 1 This is an embodiment of the energy storage device provided by the present invention. The energy storage device will be described below in conjunction with the specific accompanying drawings.

[0041] Please see Figure 1 and Figure 2 An energy storage device 100 includes a battery module 1 and a temperature regulating device 2. The battery module 1 includes a housing 11, a battery assembly 12, and a ventilation circulation system 13. The battery assembly 12 is disposed inside the housing 11. The ventilation circulation system 13 includes a ventilation circuit 131 and a return air circuit. The ventilation circuit 131 passes through the battery module 1 and is used to heat or cool the battery module 1. The return air circuit surrounds the battery module 1 and is used to heat or cool the battery module 1 again. The temperature regulating device 2 is installed on the outside of the housing 11 and is used to send hot or cold air into the ventilation circulation system 13.

[0042] In the technical solution of this invention, a battery assembly 12 is housed within the casing 11. The ventilation duct and the return air duct 132 simultaneously heat or cool the battery module 1, with the two assisting each other. This ensures that the hot or cold air supplied by the temperature regulating device 2 fills the entire casing 11, cooling or heating the entire battery module 1. This helps prevent the formation of "airflow dead zones" near the battery modules 1 due to their distance from the temperature regulating device 2, resulting in poor overall airflow within the casing 11, heat accumulation, and the formation of locally high ambient temperatures. The temperature of the battery module 1 is higher than that of other battery modules 1, resulting in a large temperature difference across the entire battery module 1 and affecting the cycle life of the energy storage device 100. During actual heating or cooling, the ventilation duct is in direct contact with the battery module 1 for heating or cooling. The return air duct 132 surrounds the battery module 1 for secondary heating or cooling. This arrangement is designed to ensure that the entire battery module 1 is heated evenly and to avoid local overheating, which would lead to uneven temperature distribution across the entire battery module 1 and affect its energy supply efficiency.

[0043] Please see Figure 1 and Figure 2 The battery assembly 12 includes a plurality of battery cells 121; the battery module 1 also includes a battery rack 14, which is disposed within the housing 11. The battery rack 14 has a plurality of battery mounting cavities 141 formed thereon, and each battery cell 121 is correspondingly installed within each of the battery mounting cavities 141. In this embodiment, to prevent the battery assembly 12 from stacking together, a battery rack 14 is provided within the housing 11, and the plurality of battery cells 121 are sequentially installed within the battery mounting cavities 141. This isolates the plurality of battery cells 121 from each other, preventing mutual interference and ensuring that each battery cell 121 is heated or cooled uniformly, thus preventing some battery cells 121 from overheating and affecting the lifespan of the energy storage device 100.

[0044] Furthermore, the material of the battery rack 14 is not limited, as long as it can support the battery assembly 12. In this embodiment, the battery rack 14 is made of aluminum alloy. Aluminum alloy is lightweight and has good thermal conductivity and heat dissipation. Therefore, choosing aluminum alloy as the material of the battery rack 14 can play a role in heat dissipation or heat conduction to a certain extent, improve the heat absorption capacity of the battery assembly 12, make the battery assembly 12 heat up more evenly, and avoid the problem of local overheating.

[0045] Please see Figure 2The temperature regulating device has a first air inlet 21 and a first air outlet 22. The battery module 1 has a first end a near the temperature regulating device 2 and a second end b away from the temperature regulating device 2. In the direction of the first end a, an air inlet channel 15 is formed between the battery assembly 12 and the inner sidewall of the housing 11, and the air inlet channel 15 is connected to the first air outlet 22. In the direction of the second end b, an air outlet channel 16 is formed between the battery assembly 12 and the inner sidewall of the housing 11. A gap passage 17 is formed between the battery assembly 12 and the battery rack 14, and the gap passage 17 connects the air inlet channel 15 and the air outlet channel 16. The ventilation path includes the air inlet channel, the air outlet channel, and the gap passage 17. In this embodiment, the battery assembly 12 forms an air inlet channel 15 with the housing 11 in the direction near the first end a. The cold or hot air provided by the temperature regulating device 2 flows into the air inlet channel 15 through the first air inlet 21, filling the entire air inlet channel 15, and then flows from the air inlet channel 15 into the gap passage 17. Since the gap passage 17 is the gap between the battery cell 121 and the battery rack 14, or between the battery rack 14 and the housing 11, the cold or hot air fully contacts the battery cell 121 when passing through the gap passage 17, so that the battery cell 121 is heated evenly. The hot or cold air flows into the air outlet duct after passing through the gap passage 17, fully illuminating the entire air outlet duct and completing the first heating or cooling of the battery assembly 12. This arrangement helps to avoid the formation of "airflow dead zones" near the battery assembly 12 due to some of the battery assembly 12 being far from the temperature regulating device 2. This results in poor overall airflow within the casing 11, leading to heat accumulation and the formation of locally high ambient temperatures. Consequently, the temperature of the battery assembly 12 surrounding it is higher than that of the battery assembly 12 in other parts, causing a large temperature difference in the overall battery assembly 12 and affecting the cycle life of the energy storage device 100.

[0046] Please see Figure 1 and Figure 2 To ensure that the hot or cold air provided by the temperature regulating device 2 can smoothly enter the housing 11, each battery mounting cavity 141 has an opening at its two ends facing the first end a and the second end b. The opening is used to connect the air inlet channel 15 and the air outlet channel 16. In this embodiment, to improve the cooling or heating efficiency of the battery cell 121, the battery mounting cavity 141 has an opening, with two openings arranged opposite each other, so that the air entering the air inlet channel 15 can flow over the surface of the battery cell 121, improving the cooling or heating efficiency. Furthermore, openings can be formed on each surface of the battery mounting cavity 141.

[0047] Furthermore, the first air inlet 21 and the first air outlet 22 are located on the same side of the temperature regulating device 2, and a partition is provided between the first air inlet 21 and the first air outlet 22. This arrangement allows the air flowing through the battery module 1 to return to the temperature regulating device 2 and be reused by the temperature regulating device 2, for example, for heating.

[0048] Please see Figure 2 The battery module 1 further has a third end c and a fourth end d located between the first end a and the second end b and disposed opposite to each other; a first air duct 18 is formed in the side wall of the housing 11 in the direction of the third end c, and the first air duct 18 is connected to the air outlet channel 16; a second air duct 19 is formed in the side wall of the housing 11 in the direction of the fourth end d, and the second air duct 19 is connected to the air outlet channel 16; a third air duct 20 is formed in the side wall of the housing 11 in the direction of the first end a, and the third air duct 20 is connected to the first air duct 18 and the second air duct 19; wherein, the return air path 132 includes the first air duct 18, the second air duct 19 and the third air duct 20. In this embodiment, the cold or warm air in the air outlet duct 16 enters the second air duct 19 and the first air duct 18, circulates in the first air duct 18 and the second air duct 19, and flows through the housing 11. Since the battery assembly 12 is located in the housing 11, the first air duct 18 and the second air duct 19 perform secondary heating or cooling on the battery assembly 12, thereby improving the heating or cooling efficiency.

[0049] Furthermore, a second air outlet is formed on the third air duct 20, and the second air outlet is connected to the first air outlet 22.

[0050] Please see Figure 3 The first air duct 18 includes a plurality of first pipes 181 and a plurality of second pipes 182. The plurality of first pipes 181 are spaced apart, and each second pipe 182 is disposed between two first pipes 181 for connecting the plurality of first pipes 181. In this embodiment, the purpose of setting the first air duct 18 and the second air duct 19 is to ensure that the cold air or the hot air fully contacts the battery assembly 12, increasing the contact area and improving the heating or cooling efficiency.

[0051] Since the second air duct 19 has the same structure as the first air duct 18, the second air duct 19 can be set up by referring to the first air duct 18, and will not be described in detail here.

[0052] Please continue reading. Figure 1 and Figure 2The specific type of the temperature regulating device 2 is not limited. In this embodiment, the temperature regulating device 2 is preferably an air conditioner. When the battery module 1 is working, the air conditioner can provide hot air to heat the battery assembly 12, so that the battery assembly 12 can work quickly. When the temperature of the battery assembly 12 is too high, the air conditioner can also provide cold air to cool down the battery module 1 and prevent the battery module 1 from overheating and causing thermal runaway.

[0053] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An energy storage device, characterized in that, include: A battery module includes a housing, a battery assembly, and a ventilation circulation system. The battery assembly is disposed within the housing. The ventilation circulation system includes a ventilation circuit and a return air circuit. The ventilation circuit runs through the battery module and is used to heat or cool the battery module. The return air circuit surrounds the battery module and is used to heat or cool the battery module a second time. as well as, A temperature regulating device is installed on the outside of the housing, and the temperature regulating device is used to send hot air or cold air into the air circulation system; The battery assembly includes multiple battery cells; The battery module also includes a battery rack, which is disposed within the housing. The battery rack has multiple battery mounting cavities, and each battery cell is installed in each of the battery mounting cavities. The temperature regulating device has a first air inlet and a first air outlet. The battery module has a first end close to the temperature regulating device and a second end away from the temperature regulating device; In the first end direction, an air inlet channel is formed between the battery assembly and the inner sidewall of the housing, and the air inlet channel is connected to the first air outlet; In the second end direction, an air outlet channel is formed between the battery assembly and the inner wall of the housing; A gap passage is formed between the battery assembly and the battery rack, and the gap passage connects the air inlet channel and the air outlet channel; The ventilation circuit includes an air inlet duct, an air outlet duct, and the gap passage. The battery module also has a third end and a fourth end located between the first end and the second end and disposed opposite to each other; The housing has a first air duct formed in the side wall at the third end direction, and the first air duct is connected to the air outlet channel; A second air duct is formed in the side wall of the housing located at the fourth end direction, and the second air duct is connected to the air outlet channel; The housing has a third air duct formed in the side wall at the first end direction, and the third air duct connects the first air duct and the second air duct; The return air circuit includes the first air duct, the second air duct, and the third air duct; A second air outlet is formed on the third air duct, and the second air outlet is connected to the first air outlet. The first air duct includes a plurality of first pipes and a plurality of second pipes. The plurality of first pipes are spaced apart, and each second pipe is located between two first pipes to connect the plurality of first pipes.

2. The energy storage device as described in claim 1, characterized in that, The battery holder is made of aluminum alloy.

3. The energy storage device as described in claim 1, characterized in that, Each of the battery mounting cavities has an opening at both ends facing the first end and the second end, and the opening is used to connect the air inlet channel and the air outlet channel.

4. The energy storage device as described in claim 1, characterized in that, The first air inlet and the first air outlet are located on the same side of the temperature regulating device, and a partition is provided between the first air inlet and the first air outlet.

5. The energy storage device as described in claim 1, characterized in that, The temperature control device includes an air conditioner.

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