Energy storage device with good heat dissipation effect

Abstract

The invention belongs to the technical field of energy storage devices, and discloses an energy storage device with a good heat dissipation effect, the energy storage device comprises a battery and a container for accommodating the battery, and a flow channel for fluid to pass through is formed between the outer surface of the battery and the inner surface of the container; the container is provided with a fluid inlet and a fluid outlet; the fluid inlet is simultaneously connected with a fluid input pipeline and a fire extinguishing agent conveying pipeline; and the fluid outlet is simultaneously connected with the fluid output pipeline and the waste heat recovery pipeline. Heat on the surface of the battery is taken away through low-temperature fluid, so that a cooling function is realized, and battery heating is avoided to shorten the cycle life of the battery or damage a battery core; when the battery is subjected to external impact or spontaneously ignited due to other reasons, the fire extinguishing agent conveying pipeline provides a green channel for a fire extinguishing agent to directly reach the battery, so that the battery is directly extinguished, the battery is prevented from burning or the burning trend of the battery is weakened, and key escape time is provided for evacuation of surrounding people; and meanwhile, the heat recovery function is achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage devices, and in particular relates to an energy storage device with good heat dissipation effect. Background Art

[0002] In the field of new energy vehicles, batteries serve as energy storage devices, replacing traditional fuels to provide the energy required for normal vehicle operation. Using electricity as a power source offers the following advantages: 1. It produces no tailpipe emissions, is environmentally friendly, and can effectively reduce air pollution and greenhouse gas emissions; 2. It has high energy conversion efficiency. Batteries are highly efficient at converting chemical energy into electrical energy, and electric motors are more efficient at converting electrical energy into mechanical energy than traditional internal combustion engines; 3. It has low maintenance costs, lacking complex mechanical components such as engines and transmissions, resulting in a small number of parts; 4. It is compact and flexible in layout.

[0003] Batteries generate heat during charging and discharging, causing the battery to heat up. This is because: 1. There is a certain amount of resistance inside the battery, and when current passes through it, the current generates heat on the resistance; 2. Conversion efficiency issues; 3. Chemical reactions inside the battery generate heat.

[0004] For these reasons, batteries as energy storage devices are subject to heat generation. High temperatures can significantly reduce cycle life and lead to thermal runaway of the battery cells. Furthermore, collisions can easily cause high-voltage circuit short circuits or battery pack ruptures, leading to arcing and ignition of the electrolyte, resulting in fires.

[0005] In order to solve the above problems, an energy storage device with good heat dissipation effect is provided. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the object of the present invention is to provide an energy storage device with better heat dissipation effect.

[0007] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows:

[0008] An energy storage device with good heat dissipation effect includes a battery and a container for accommodating the battery, wherein a flow channel for passing a fluid is formed between the outer surface of the battery and the inner surface of the container;

[0009] The container is provided with a fluid inlet and a fluid outlet;

[0010] The fluid inlet is connected to the fluid input pipeline and the fire extinguishing agent delivery pipeline at the same time;

[0011] The fluid outlet is connected to the fluid output pipeline and the waste heat recovery pipeline at the same time.

[0012] In the present invention, the flow channel creates a standardized movement space for the flow of fluid. The fluid is used for heat exchange, thereby removing heat from the battery surface, achieving a cooling function, and preventing the battery from heating up, which may reduce the battery cycle life or damage the battery cell. Specifically, the fluid enters the container from the fluid inlet, passes through the flow channel, and exchanges heat with the battery, and then escapes from the container from the fluid outlet after entraining the heat.

[0013] In addition to achieving the basic cooling function mentioned above, the present invention also has a fire extinguishing function. When the battery is hit by an external impact or spontaneously combusts due to other reasons, the fire extinguishing agent delivery pipeline provides a green channel for the fire extinguishing agent to reach the battery directly. The fire extinguishing agent enters the container through the fire extinguishing agent delivery pipeline and the fluid input pipeline, thereby directly extinguishing the battery fire, preventing the battery from burning or reducing the battery's burning tendency, providing critical escape time for nearby personnel.

[0014] The present invention also has a heat recovery function. After heat exchange, the temperature of the fluid discharged from the fluid outlet rises. If the temperature after rising is greater than the set value, these fluids carrying heat can be sent to the parts that need heating through the waste heat recovery pipeline. For example, on new energy vehicles, these heated fluids can heat the key components of the new energy vehicle to prevent these key components from failing to work normally under cold conditions; if the temperature after rising is lower than the set value, the fluid will re-circulate through the fluid output pipeline. Specifically, these fluids are cooled and filtered, and then stored as preparatory fluids entering the container. When needed, they will re-enter the flow channel between the battery and the container through the fluid input pipeline.

[0015] Beneficial effects of the present invention:

[0016] 1. The heat on the battery surface is taken away by low-temperature fluid to achieve cooling function, avoiding battery heating, which will reduce the battery cycle life or damage the battery cell;

[0017] 2. When a battery is hit by an external impact or spontaneously combusts due to other reasons, the fire extinguishing agent delivery pipeline provides a green channel for the fire extinguishing agent to reach the battery directly, thereby directly extinguishing the battery fire, preventing the battery from burning or reducing the battery's burning tendency, and providing critical escape time for nearby personnel;

[0018] 3. It has a heat recovery function. Specifically, if the temperature rise value of the fluid after heat exchange is greater than the set value, the fluid carrying heat can be sent to the parts that need heating through the waste heat recovery pipeline, such as the key components on new energy vehicles, to prevent these key components from malfunctioning under cold conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0020] Figure 1 is a cross-sectional view of an embodiment of the present invention;

[0021] Figure 2 For the embodiment of the present invention Figure 1 a cross-sectional view of the middle container;

[0022] Figure 3 Schematic diagram of the external structure of an embodiment of the present invention;

[0023] Figure 4 For the embodiment of the present invention Figure 1 A partial enlarged view of point A in the middle;

[0024] Figure 5 For the embodiment of the present invention Figure 2 A partial enlarged view of point B in the middle.

[0025] The main component symbols are described as follows:

[0026] 1. Container; 11. Separator; 12. Interface; 13. Reserved opening; 14. Anti-collision layer; 15. Buffer heat absorption layer; 16. High thermal conductivity layer;

[0027] 2. Battery; 21. Phase change material layer;

[0028] 3. Runner;

[0029] 4. Sensor;

[0030] 5. Fluid input pipeline;

[0031] 6. Fire extinguishing agent delivery pipeline;

[0032] 71. First valve; 72. Second valve;

[0033] 8. Fluid output pipeline;

[0034] 9. Waste heat recovery pipeline. DETAILED DESCRIPTION

[0035] The technical solutions of the present invention are described in detail below in conjunction with specific embodiments and their accompanying drawings. The embodiments described herein are specific embodiments of the present invention and are used to illustrate the concept of the present invention; these descriptions are explanatory and exemplary and should not be understood as limiting the embodiments of the present invention and the scope of protection of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the contents disclosed in the claims of this application and its specification, including technical solutions that adopt any obvious replacements and modifications to the embodiments described herein.

[0036] Example 1

[0037] like Figure 1 、 3 As shown, this embodiment provides an energy storage device with good heat dissipation effect, including a battery 2 and a container 1 for accommodating the battery 2, and a flow channel 3 for passing a fluid is formed between the outer surface of the battery 2 and the inner surface of the container 1;

[0038] The container 1 is provided with a fluid inlet and a fluid outlet;

[0039] The fluid inlet is connected to the fluid input pipeline 5 and the fire extinguishing agent delivery pipeline 6 at the same time;

[0040] The fluid outlet is connected to the fluid output pipeline 8 and the waste heat recovery pipeline 9 at the same time.

[0041] In this embodiment, the flow channel 3 creates a standardized movement space for the flow of fluid. The fluid is used for heat exchange, thereby removing heat from the surface of the battery 2, achieving a cooling function, and preventing the battery 2 from heating up, which may reduce the cycle life of the battery 2 or damage the battery cell. Specifically, the fluid enters the container 1 from the fluid inlet, passes through the flow channel 3, and exchanges heat with the battery 2. After entraining heat, the fluid escapes from the container 1 from the fluid outlet.

[0042] In addition to achieving the basic cooling function described above, the present invention also has a fire extinguishing function. When the battery 2 is hit by an external impact or spontaneously combusts due to other reasons, the fire extinguishing agent delivery pipe 6 provides a green channel for the fire extinguishing agent to directly reach the battery 2. The fire extinguishing agent enters the container 1 through the fluid input pipe 5 via the fire extinguishing agent delivery pipe 6, thereby directly extinguishing the battery 2, preventing the battery 2 from burning or reducing the burning tendency of the battery 2, and providing critical escape time for nearby personnel.

[0043] The present invention also has a heat recovery function. After heat exchange, the temperature of the fluid discharged from the fluid outlet rises. If the temperature after rising is greater than the set value, these fluids carrying heat can be sent to the parts that need heating through the waste heat recovery pipe 9. For example, on new energy vehicles, these heated fluids can heat the key components of the new energy vehicles to prevent these key components from failing to work normally under cold conditions; if the temperature after rising is lower than the set value, the fluid will re-circulate through the fluid output pipe 8. Specifically, these fluids are cooled and filtered, and then stored as preparatory fluids entering the container 1. When needed, they will re-enter the flow channel 3 between the battery 2 and the container 1 through the fluid input pipe 5.

[0044] Example 2

[0045] like Figure 1 、 5As shown, this embodiment provides an energy storage device with better heat dissipation effect. The difference from embodiment 1 is that the inner wall of the container 1 is provided with a plurality of groups of dividing strips 11, and the flow channel 3 is divided into a plurality of flow channel sub-units under the isolation of the dividing strips 11;

[0046] The number of fluid inlets, fluid outlets and flow channel sub-units is equal, and each flow channel sub-unit corresponds to only one fluid inlet and one flow channel outlet.

[0047] In this embodiment, the flow channel 3 is divided by the dividing strips 11. The shape of the dividing strips 11 can constrain the shape of the flow channel subunits. For example, if the dividing strips 11 are wavy, the flow channel subunits will form a winding trajectory. This winding trajectory can increase the length of the flow path, thereby extending the residence time of the fluid in the flow channel 3, thereby improving the heat exchange effect.

[0048] The flow channel sub-unit corresponds to only one fluid inlet and one flow channel outlet, so that each flow channel sub-unit has an independent fluid supply interface and fluid discharge interface, thereby providing a basis for the partitioned supply of flow;

[0049] More importantly, the partitioning design concept of dividing the flow channel 3 into several flow channel sub-units is more suitable for the heating phenomenon where the local temperature of the battery may be too high. When the local temperature of the battery 2 is too high, the flow volume of the corresponding partitioned flow channel sub-unit can be increased, thereby improving the heat exchange effect and reducing the occurrence of local high temperature.

[0050] Example 3

[0051] like Figure 3 As shown, this embodiment provides an energy storage device with better heat dissipation effect. The difference from Example 2 is that it further includes a first valve 71. The output end of the first valve 71 is connected to a plurality of fluid inlets via a first branch. The number of first branches corresponds to the number of fluid inlets. The input end of the first valve 71 is connected to the fluid input pipeline 5 and the fire extinguishing agent delivery pipeline 6 at the same time.

[0052] A flow valve is provided on the path of the first branch;

[0053] It also includes a second valve 72, the input end of the second valve 72 is connected to several fluid outlets through a second branch, the number of second branches corresponds to the number of fluid outlets, and the output end of the second valve 72 is simultaneously connected to the fluid output pipeline 8 and the waste heat recovery pipeline 9.

[0054] In this embodiment, the input end of the first valve 71 is connected to the fluid input pipeline 5 and the fire extinguishing agent delivery pipeline 6 at the same time. The first valve 71 determines the specific connection object and the cutoff object. When cooling fluid needs to be input, it is connected to the fluid input pipeline 5. When fire extinguishing is required, it is connected to the fire extinguishing agent delivery pipeline 6. The passage between the first valve 71 and the fluid inlet is constructed by the first branch. The flow valve on the first branch is used to control the fluid flow. When the fluid flow needs to be increased to cope with local abnormal temperature rise, the flow valve corresponding to the flow channel subunit increases the valve opening. If the temperature is within the safety threshold and is relatively stable, the flow valve can appropriately reduce the opening to save fluid.

[0055] The passage between the second valve 72 and the fluid outlet is built by the second branch. The output end of the second valve 72 is connected to the fluid output pipe 8 and the waste heat recovery pipe 9 at the same time, and the second valve 72 determines the specific connection object and the cutoff object. If the temperature rise of the fluid after the heat exchange is less than the set value, it indicates that the fluid at this time can still be used. Because the temperature rise is not high, the second valve 72 is connected to the fluid output pipe 8. If the temperature rise of the fluid after the heat exchange is greater than the set value, it indicates that the temperature of the fluid at this time has risen too high. If these fluids are cooled again, a lot of energy will be consumed. Therefore, these fluids with excessively high temperature rises are directly sent to the waste heat recovery pipe 9 to heat the components that need to be heated, such as some key components of new energy vehicles and components with liquid circulation, to prevent these structures from failing to operate normally under cold conditions. At this time, the second valve 72 is connected to the waste heat recovery pipe 9.

[0056] Example 4

[0057] like Figure 4 、 5 As shown, this embodiment provides an energy storage device with better heat dissipation effect. The difference from Example 2 is that the sensor 4 is installed in the container 1, and the container 1 is provided with an interface 12 for installing the sensor 4.

[0058] In this embodiment, each flow channel sub-unit is provided with a sensor 4 for monitoring. The sensor 4 is fixed on the interface 12 of the container 1. The sensor 4 includes a temperature sensor, a flow rate sensor, an air pressure sensor, etc. The temperature sensor can be used to directly monitor the temperature of the surface of the battery 2 to detect whether the local temperature rises abnormally. The air pressure sensor can determine whether the flow channel sub-unit is blocked. The flow rate sensor can determine whether the speed of the incoming fluid is appropriate. Of course, other advantageous sensors can also be freely selected as needed.

[0059] Example 5

[0060] This embodiment provides an energy storage device with better heat dissipation effect. The difference from Embodiment 1 is that a filter is provided on the path of the fluid input pipeline 5 .

[0061] In this embodiment, the filter is used to block impurities in the fluid to prevent these impurities from entering the flow channel 3 and contaminating the surface of the battery 2. Since the battery 2 is located in the container 1, if the battery 2 is contaminated, the subsequent cleaning process will be very cumbersome.

[0062] Example 6

[0063] like Figure 4 As shown, this embodiment provides an energy storage device with better heat dissipation effect. The difference from embodiment 1 is that the outer surface of the battery 2 is covered with a phase change material layer 21.

[0064] In this embodiment, the main function of the phase change material layer 21 is to quickly absorb the heat on the battery surface through the phase change of the material, thereby achieving rapid heat transfer and rapid cooling of the battery;

[0065] When heated, the phase change material layer 21 absorbs the heat of the battery and changes from solid to liquid, transferring the heat of the battery to itself, thereby ensuring that the temperature of the battery does not become too high. Subsequently, heat exchange occurs between the phase change material layer 21 and the fluid, and the fluid carries away the heat.

[0066] This heat transfer method can greatly improve the safety factor of the battery, especially when transient high temperature occurs.

[0067] In some optional examples, the phase change material layer 21 is a paraffin-based composite material.

[0068] Example 7

[0069] like Figure 5 As shown, this embodiment provides an energy storage device with better heat dissipation effect. The difference from Example 1 is that the container 1 is composed of an anti-collision layer 14, a buffer heat absorption layer 15 and a high thermal conductivity layer 16 from the outside to the inside.

[0070] In this embodiment, the anti-collision layer 14 can prevent the internal battery 2 from being directly impacted. The buffer heat absorption layer 15 can absorb external impact force on the one hand, and transfer the heat on the high thermal conductivity layer 16 to the anti-collision layer 14 on the other hand. The high thermal conductivity layer 16 mainly conducts heat, absorbs internal heat and transfers it to the outside.

[0071] In some optional examples, the anti-collision layer 14 is made of carbon fiber reinforced plastic;

[0072] The high thermal conductivity layer 16 is made of a high thermal conductivity aluminum alloy;

[0073] The buffer heat absorption layer 15 is made of silica gel.

[0074] Example 8

[0075] like Figure 5 As shown, this embodiment provides an energy storage device with better heat dissipation effect. The difference from Example 7 is that the container 1 is provided with a reserved opening 13 at a position corresponding to the battery plug interface, and the inner wall of the container 1 is provided with an isolation ring at a position corresponding to the reserved opening 13 for surrounding the battery plug interface and isolating the battery plug interface from the flow channel 3.

[0076] In this embodiment, since the battery 2 needs to transmit energy to the outside and obtain energy from the outside, the role of the reserved opening 13 is naturally to facilitate the connection between the battery 2 and the cable, and to prevent the container 1 from interfering with the normal wiring of the battery 2;

[0077] The function of the isolation ring is to isolate the plug interface of the battery 2 from the flow channel 3. Because heat exchange occurs in the flow channel, with the rise and fall of temperature and the contact of fluids, there may be an influx of impurities and the appearance of moisture. The connection at the plug interface is relatively critical. Therefore, the setting of the isolation ring can ensure that the connection of the battery 2 is not affected.

[0078] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person skilled in the art without departing from the spirit and technical concepts disclosed herein shall be covered by the claims of the present invention.

Claims

1. An energy storage device with good heat dissipation effect, characterized by: The invention comprises a battery (2) and a container (1) for accommodating the battery (2), wherein a flow channel (3) for passing a fluid is formed between the outer surface of the battery (2) and the inner surface of the container (1); The container (1) is provided with a fluid inlet and a fluid outlet; The fluid inlet is connected to the fluid input pipeline (5) and the fire extinguishing agent delivery pipeline (6) at the same time; The fluid outlet is simultaneously connected to a fluid output pipeline (8) and a waste heat recovery pipeline (9).

2. The energy storage device with good heat dissipation effect according to claim 1, characterized in that: The inner wall of the container (1) is provided with a plurality of groups of dividing strips (11), and the flow channel (3) is divided into a plurality of flow channel sub-units under the isolation of the dividing strips (11).

3. The energy storage device with good heat dissipation effect according to claim 2, characterized in that: The number of the fluid inlet, the fluid outlet and the flow channel sub-units is equal, and each of the flow channel sub-units corresponds to only one fluid inlet and one flow channel outlet.

4. The energy storage device with good heat dissipation effect according to claim 3, characterized in that: The invention comprises a first valve (71), wherein an output end of the first valve (71) is connected to a plurality of fluid inlets via a first branch, the number of the first branches corresponding to the number of the fluid inlets, and an input end of the first valve (71) is simultaneously connected to a fluid input pipeline (5) and a fire extinguishing agent delivery pipeline (6); A flow valve is provided on the path of the first branch.

5. The energy storage device with good heat dissipation effect according to claim 3, characterized in that: The invention comprises a second valve (72), wherein the input end of the second valve (72) is connected to a plurality of fluid outlets via a second branch, the number of the second branches corresponds to the number of fluid outlets, and the output end of the second valve (72) is simultaneously connected to a fluid output pipeline (8) and a waste heat recovery pipeline (9).

6. The energy storage device with good heat dissipation effect according to claim 3, characterized in that: The container (1) is installed with a sensor (4), and the container (1) is provided with an interface (12) for installing the sensor (4).

7. The energy storage device with good heat dissipation effect according to claim 1, characterized in that: A filter is provided on the path of the fluid input pipeline (5).

8. The energy storage device with good heat dissipation effect according to claim 1, characterized in that: The outer surface of the battery (2) is coated with a phase change material layer (21).

9. The energy storage device with good heat dissipation effect according to claim 1, characterized in that: The container (1) comprises, from the outside to the inside, an anti-collision layer (14), a buffer heat absorption layer (15) and a high heat conductivity layer (16).

10. The energy storage device with good heat dissipation effect according to claim 9, characterized in that: The container (1) is provided with a reserved opening (13) at a position corresponding to the battery plug interface, and the inner wall of the container (1) is provided with an isolation ring at a position corresponding to the reserved opening (13) for surrounding the battery plug interface and isolating the battery plug interface from the flow channel (3).

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