Novel household liquid cooling energy storage system

Abstract

The utility model discloses a novel household liquid cooling energy storage system which comprises battery cells, two cooling water plates, a radiator and a waterway system, the battery cells are arranged in a battery cell support in an array mode, and the battery cell support is fixedly installed on a battery cell base; the two cooling water plates are respectively mounted on two sides of the battery cell; outlets of the two cooling water plates are connected through a gathering pipeline, an outlet of the gathering pipeline is connected with an inlet of a waterway system through a water outlet pipeline, and part of the pipeline of the waterway system is arranged in the radiator. A water pump is arranged on the waterway system; inlets of the two cooling water plates are connected through a diversion pipeline, and an inlet of the diversion pipeline is connected with an outlet of the waterway system through a water inlet pipeline. A water replenishing kettle for injecting new cooling liquid into the water inlet pipeline is arranged on the water inlet pipeline, and a pressure sensor for detecting the hydraulic pressure of the cooling liquid in the water inlet pipeline is arranged at the joint of the water replenishing kettle and the water inlet pipeline; the radiator comprises a fan, a windproof cover and radiating fins, and the fan and the radiating fins are sequentially installed on the outer side of the windproof cover from top to bottom.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy storage technology, and in particular to a novel household liquid cooling energy storage system. Background Art

[0002] In existing energy storage systems, excessively high temperatures within lithium-ion battery packs can lead to an overly rapid conversion of chemical energy into electrical energy, accelerating harmful reactions such as electrolyte decomposition, permanently damaging the battery's chemical structure, and shortening its lifespan. Under low-temperature conditions, the electrolyte activity within the battery is low, the diffusion rate of lithium ions is reduced, the battery's internal resistance increases, and the discharge capacity is significantly reduced. Furthermore, the internal pressure rises rapidly during charging, affecting the battery's safety. Furthermore, uneven temperatures within the battery pack can lead to uneven distribution of lithium battery capacity, shortening the overall battery pack lifespan and reducing vehicle performance.

[0003] See also Figure 1 In existing energy storage systems, air-cooling fins (i.e., air cooling) are provided at both ends of the battery cell bracket, which directly allow air to pass through the battery cell module to achieve the purpose of cooling / heating. However, the heat exchange coefficient between the air passing through the battery cell module and the battery cell wall is low, the cooling speed is slow, and the efficiency is low. Therefore, the heat dissipation efficiency of existing energy storage systems is low, resulting in the problem of excessively high battery core temperature and excessive temperature difference during long-term use, which will greatly affect the life of the battery system. Utility Model Content

[0004] The purpose of this application is to provide a new household liquid-cooled energy storage system to address the technical defects in the existing technology.

[0005] The technical solutions adopted to achieve the purpose of this application are:

[0006] A novel household liquid-cooled energy storage system includes a battery cell, two cooling water plates, a radiator, and a water system. The battery cell array is arranged in a battery cell holder, which is fixedly mounted on a battery cell base. The two cooling water plates are mounted on either side of the battery cell. The outlets of the two cooling water plates are connected by a collecting pipe, which is connected to the inlet of the water system via an outlet pipe. A portion of the pipes of the water system are disposed within the radiator. The water system is provided with a water pump for pumping coolant in the cooling water plates after heat exchange with the battery cells into the water system. The inlets of the two cooling water plates are connected by a shunt pipe, which is connected to the outlet of the water system via an inlet pipe.

[0007] The water inlet pipe is provided with a water supply pot for injecting new coolant into the water inlet pipe, and a pressure sensor for detecting the hydraulic pressure of the coolant in the water inlet pipe is provided at the connection between the water supply pot and the water inlet pipe;

[0008] The radiator comprises a fan, a wind shield and heat sinks, and the fan and the heat sinks are sequentially arranged on the outer side of the wind shield from top to bottom.

[0009] In the above technical solution, the cooling water plate is bonded to the battery cell by adhesive.

[0010] In the above technical solution, the cooling water plate is a U-shaped cooling water plate and an S-shaped cooling water plate.

[0011] In the above technical solution, the U-shaped cooling water plate includes a U-shaped water-cooling tube group, two first metal plates and a rectangular group, the U-shaped water-cooling tube group includes multiple U-shaped water-cooling tubes, each U-shaped water-cooling tube includes a first water tube and a second water tube, the first water tube and the second water tube are connected by a first U-shaped bend tube; the inner surface of each first metal plate is provided with a U-shaped groove matching the U-shaped water-cooling tube; a water inlet chamber and a water outlet chamber are provided in the rectangular group, the water inlet chamber and the first water tube are connected by a first connecting tube; the water outlet chamber and the second water tube are connected by a second connecting tube; the water inlet chamber is connected to the diversion pipe through the water inlet pipe; the water outlet chamber is connected to the aggregation pipe through the water outlet pipe.

[0012] In the above technical solution, the two first metal plates are fixed by bolts.

[0013] In the above technical solution, the water inlet pipe and the diversion pipe are connected by plugging or snapping; the water outlet pipe and the collecting pipe are connected by plugging or snapping.

[0014] In the above technical solution, the first connecting pipe includes a first straight pipe and a first curved pipe, one end of the first straight pipe is connected to the water inlet chamber, and the other end is connected to the first curved pipe; the second connecting pipe includes a second straight pipe and a second curved pipe, one end of the second straight pipe is connected to the water outlet chamber, and the other end is connected to the second curved pipe.

[0015] In the above technical solution, the other end of the first straight tube is welded to the cuboid group, and the other end of the second straight tube is welded to the cuboid group.

[0016] In the above technical solution, one end of the water inlet pipe and the water outlet pipe are respectively welded to the rectangular parallelepiped group.

[0017] In the above technical solution, the S-shaped cooling water plate includes an S-shaped water-cooling tube group, two second metal plates, a rectangular water inlet cavity and a rectangular water outlet cavity. The S-shaped water-cooling tube group includes multiple S-shaped water-cooling tubes, each S-shaped water-cooling tube includes a third water tube, a fourth water tube and a fifth water tube, the third water tube is connected to the fourth water tube through a second U-shaped bend, and the fourth water tube is connected to the fifth water tube through a second U-shaped bend; the inner surface of the second metal plate is provided with an S-shaped groove matching the S-shaped water-cooling tube; the third water tube is vertically welded to the rectangular water inlet cavity, and the fifth water tube is vertically welded to the rectangular water outlet cavity; one end of the rectangular water inlet cavity is provided with a water inlet; one end of the rectangular water outlet cavity is provided with a water outlet.

[0018] The beneficial effects of the utility model are as follows:

[0019] 1. The liquid-cooled energy storage system of the present invention can solve the problem of excessively high battery core temperature caused by low cooling coefficient of battery core modules.

[0020] 2. The cooling water plate of the liquid-cooled energy storage system of the utility model is combined with the radiator, which has high heat dissipation efficiency and can solve the problem of excessively high battery core temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the energy storage system structure in the prior art.

[0023] Figure 2 It is a side view of the liquid-cooled energy storage system of the present invention.

[0024] Figure 3 This is a three-dimensional diagram of the liquid-cooled energy storage system of the present invention.

[0025] Figure 4 This is the temperature distribution diagram of the battery cells of the new household liquid-cooled energy storage system of the present utility model.

[0026] Figure 5 This is a temperature change curve of the 1C charging cell of the new household liquid-cooled energy storage system of the present utility model.

[0027] Figure 6 This is a vertical cross-sectional view of a cooling water plate with a U-shaped water cooling tube group according to the present invention.

[0028] Figure 7This is a cross-sectional schematic diagram of a cooling water plate with a U-shaped water-cooling tube group according to the present invention.

[0029] Figure 8 This is a vertical cross-sectional view of a cooling water plate with an S-shaped water cooling tube group according to the present invention.

[0030] In the figure: 1-battery cell, 1-1-battery cell base, 2-cooling water plate, 2-1-collecting pipe, 2-2-outlet pipe, 2-3-diversion pipe, 2-4-U-shaped water cooling pipe group, 2-4-1-U-shaped water cooling pipe, 2-4-2-first water pipe, 2-4-3-second water pipe, 2-4-4-first U-shaped elbow, 2-4-5-first connecting pipe, 2-4-6-second connecting pipe, 2-4-7-first straight pipe, 2-4-8-first elbow, 2-4-9-second straight pipe, 2-4-10-second elbow, 2-5-first metal plate, 2-6-rectangular parallelepiped group, 2-6-1-water inlet cavity, 2-6-2-outlet Water cavity, 2-6-3-water inlet pipe, 2-6-4-water outlet pipe, 2-7-S-type water-cooling pipe group, 2-7-1-S-type water-cooling pipe, 2-7-2-third water pipe, 2-7-3-fourth water pipe, 2-7-4-fifth water pipe, 2-7-5-second U-shaped bend pipe, 2-7-6-third U-shaped bend pipe, 2-8-second metal plate, 2-9-rectangular water inlet cavity, 2-10-rectangular water outlet cavity, 2-11-water outlet, 2-12-water inlet, 3-radiator, 3-1-water inlet pipe, 3-2-fan, 3-3-wind shield, 3-4-heat sink, 4-water supply pot, 5-water system, 5-1-water pump. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0032] Example 1

[0033] A new household liquid cooling energy storage system, see Figure 2 、 Figure 3, including: battery cells 1, two cooling water plates 2, a radiator 3 and a water system 5, the battery cells 1 are arranged in an array in a battery cell bracket, and the battery cell bracket is fixedly mounted on a battery cell base 1-1; two cooling water plates 2 are respectively mounted on both sides of the battery cell 1 (the cooling water plates 2 are bonded to the battery cell 1 by adhesive) for heat exchange with the battery cell 1; the outlets of the two cooling water plates 2 are connected through a collecting pipe 2-1, and the outlet of the collecting pipe 2-1 is connected to the inlet of the water system 5 through a water outlet pipe 2-2, and a part of the pipes of the water system 5 are arranged on the radiator 3, for passing the heat-exchanged coolant into the water system 5 pipes in the radiator 3, where the coolant in the water system 5 is cooled by the radiator 3. The water system 5 is provided with a water pump 5-1 for pumping the coolant in the cooling water plate 2 after heat exchange with the battery cell 1 into the water system 5. The inlets of the two cooling water plates 2 are connected by a diversion pipe 2-3, and the inlet of the diversion pipe 2-3 is connected to the outlet of the water system 5 via the water inlet pipe 3-1, so as to divert the coolant after heat exchange and cooling in the radiator 3 and pass it into the two cooling water plates 2 respectively. A water replenishment pot 4 is provided on the water inlet pipe 3-1. A pressure sensor is provided at the connection between the water replenishment pot 4 and the water inlet pipe 3-1 to detect the coolant hydraulic pressure in the water inlet pipe 3-1. When the coolant hydraulic pressure in the water inlet pipe 3-1 falls below a set value, the water replenishment pot 4 is controlled to inject new coolant into the water inlet pipe 3-1.

[0034] The cooling water plate 2 of this embodiment is a U-shaped cooling water plate and an S-shaped cooling water plate.

[0035] The radiator 3 includes a fan 3-2, a wind shield 3-3 and a heat sink 3-4. The fan 3-2 and the heat sink 3-4 are sequentially installed on the outside of the wind shield 3-3 from top to bottom. The fan 3-2 is used to blow external cold air into the wind shield 3-2, and the coolant in the water system 5 pipe in the radiator 3 after heat exchange with the battery cell 1 is heat exchanged and cooled. The hot air after heat exchange is then discharged through the heat sink 3-4, generating air flow and increasing heat exchange efficiency.

[0036] A battery cell cooling method based on a novel household liquid-cooled energy storage system comprises the following steps:

[0037] Step 1: Use the collecting pipe 2-1 to collect the coolant in the two cooling water plates 2 after heat exchange with the battery cell 1, turn on the water pump 5-1 of the water system 5, and use the water pump 5-1 to pump the coolant in the cooling water plates 2 after heat exchange with the battery cell 1 into the water system 5 through the outlet pipe 2-2;

[0038] Step 2: Turn on the fan 3-2 of the radiator 3, and use the fan 3-2 to blow external cold air into the windshield 3-2 of the radiator 3, so as to exchange heat and cool the coolant in the water system 5 pipe in the radiator 3 after heat exchange with the battery cell 1, and then discharge the hot air after heat exchange through the heat sink 3-4;

[0039] Step 3: The coolant cooled by the radiator 3 is passed into the diversion pipe 2-3 through the water inlet pipe 3-1, and then the diversion pipe 2-3 diverts the coolant into the two cooling water plates 2 to exchange heat with the battery cell 1 again;

[0040] Step 4, loop steps 1-3 to achieve continuous cooling and heat exchange of the battery cell 1 to prevent the battery cell 1 from overheating. When the pressure sensor detects that the coolant hydraulic pressure in the water inlet pipe 3-1 is lower than the set value, control the water supply pot 4 to inject new coolant into the water inlet pipe 3-1.

[0041] See also Figure 4 、 Figure 5 In this embodiment, the CAE simulation method is used to obtain the temperature of each battery cell 1 of the novel household liquid-cooled energy storage system. The maximum temperature of the battery cell 1 is 25.401°C, the minimum temperature is 25.365°C, and the maximum temperature difference is 0.036°C. In this embodiment, the maximum temperature, minimum temperature, and maximum temperature difference of the battery cell 1 all meet the management requirements of the household energy storage system.

[0042] Example 2

[0043] Based on Example 1, see Figure 6 、 Figure 7The U-shaped cooling water plate includes a U-shaped water-cooling pipe group 2-4, two first metal plates 2-5 and a rectangular parallelepiped group 2-6. The U-shaped water-cooling pipe group 2-4 includes multiple U-shaped water-cooling pipes 2-4-1. Each U-shaped water-cooling pipe 2-4-1 includes a first water pipe 2-4-2 and a second water pipe 2-4-3. The first water pipe 2-4-2 and the second water pipe 2-4-3 are connected through a first U-shaped elbow 2-4-4; the inner surface of each first metal plate 2-5 is provided with a U-shaped groove matching the U-shaped water-cooling pipe 2-4-1, so that the U-shaped water-cooling pipe 2-4-1 is arranged in the U-shaped groove; the rectangular parallelepiped group 2-6 is provided with a water inlet cavity 2-6-1 and an outlet cavity 2-6-2. The water chamber 2-6-2, wherein the water inlet chamber 2-6-1 is connected to the first water pipe 2-4-2 via a first connecting pipe 2-4-5, for passing coolant into the cooling water plate 2; the water outlet chamber 2-6-2 is connected to the second water pipe 2-4-3 via a second connecting pipe 2-4-6, for discharging the coolant after heat exchange with the battery cell 1; the water inlet chamber 2-6-1 is connected to the shunt pipe 2-3 via the water inlet pipe 2-6-3, for passing the coolant cooled by the radiator 3 into the water inlet chamber 2-6-1; the water outlet chamber 2-6-2 is connected to the aggregate pipe 2-1 via the water outlet pipe 2-6-4, for passing the coolant after heat exchange into the aggregate pipe 2-1. The two first metal plates 2-5 are fixed by bolts; the water inlet pipe 2-6-3 and the shunt pipe 2-3 are connected by plug-in or snap-fit; and the water outlet pipe 2-6-4 and the aggregate pipe 2-1 are connected by plug-in or snap-fit.

[0044] Furthermore, the first metal plate 2-5 is produced by stamping or casting, and the production materials of the first metal plate 2-5 include aluminum plate, stainless steel, copper, alloy and other materials with good thermal conductivity, which can improve the thermal conductivity of the cooling water plate.

[0045] The first connecting pipe 2-4-5 includes a first straight pipe 2-4-7 and a first curved pipe 2-4-8, one end of the first straight pipe 2-4-7 is connected to the water inlet chamber 2-6-1, and the other end is connected to the first curved pipe 2-4-8; the second connecting pipe 2-4-6 includes a second straight pipe 2-4-9 and a second curved pipe 2-4-10, one end of the second straight pipe 2-4-9 is connected to the water outlet chamber 2-6-2, and the other end is connected to the second curved pipe 2-4-10. The other end of the first straight pipe 2-4-7 is welded to the rectangular parallelepiped assembly 2-6 to secure the first straight pipe 2-4-7 and facilitate its connection to the first curved pipe 2-4-8. The other end of the second straight pipe 2-4-9 is welded to the rectangular parallelepiped assembly 2-6 to secure the second straight pipe 2-4-9 and facilitate its connection to the second curved pipe 2-4-10. One end of the inlet pipe 2-6-3 and the outlet pipe 2-6-4 are respectively welded to the rectangular parallelepiped assembly 2-6 to secure the inlet pipe 2-6-3 and the outlet pipe 2-6-4. The inlet pipe 2-6-3 is located at the bottom of the rectangular parallelepiped assembly 2-6 to facilitate its connection to the diversion pipe 2-3. The outlet pipe 2-6-4 is located at the top of the rectangular parallelepiped assembly 2-6 to facilitate its connection to the collecting pipe 2-1.

[0046] Example 3

[0047] Based on Example 1-2, see Figure 8 The S-shaped cooling water plate includes an S-shaped water-cooling pipe group 2-7, two second metal plates 2-8, a rectangular water inlet cavity 2-9 and a rectangular water outlet cavity 2-10. The S-shaped water-cooling pipe group 2-7 includes multiple S-shaped water-cooling pipes 2-7-1. Each S-shaped water-cooling pipe 2-7-1 includes a third water pipe 2-7-2, a fourth water pipe 2-7-3 and a fifth water pipe 2-7-4. The third water pipe 2-7-2 is connected to the fourth water pipe 2-7-3 through a second U-shaped bend pipe 2-7-5. The fourth water pipe 2-7-3 is connected to the fifth water pipe 2-7-4 through a third U-shaped bend pipe 2-7-6. The inner surface of the second metal plate 2-8 is provided with an S-shaped groove matching the S-shaped water-cooling pipe 2-7-1, so that the S-shaped water-cooling pipe 2-7-1 can be arranged in the S-shaped groove; the third water pipe 2-7-2 is a water inlet pipe, which is vertically welded to the rectangular water inlet cavity 2-9, and the fifth water pipe 2-7-4 is a water outlet pipe, which is vertically welded to the rectangular water outlet cavity 2-10; one end of the rectangular water inlet cavity 2-9 is provided with a water inlet 2-12 for connecting to the diversion pipe 2-3; one end of the rectangular water outlet cavity 2-10 is provided with a water outlet 2-11 for connecting to the aggregation pipe 2-1. Among them, the two S-shaped second metal plates 2-8 are connected by bolts; the water inlet 2-12 is connected to the diversion pipe 2-3 by plug-in or snap-on connection; the water outlet 2-11 is connected to the aggregation pipe 2-1 by plug-in or snap-on connection.

[0048] Furthermore, the S second metal plate 2-8 is produced by stamping or casting, and the production materials of the S second metal plate 2-8 include aluminum plate, stainless steel, copper, alloy and other materials with good thermal conductivity, which can improve the thermal conductivity of the cooling water plate.

[0049] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to illustrate the relationship between one element or feature shown in the figures and another element or feature. It should be understood that, in addition to the orientation shown in the figures, spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0050] Moreover, relational terms such as “first” and “second” are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any actual relationship or order between these components.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A new household liquid cooling energy storage system, characterized in that: The battery cell system comprises a battery cell, two cooling water plates, a radiator and a water system. The battery cell array is arranged in a battery cell bracket, and the battery cell bracket is fixedly mounted on the battery cell base. The two cooling water plates are respectively mounted on both sides of the battery cell. The outlets of the two cooling water plates are connected by a collecting pipe, and the outlet of the collecting pipe is connected to the inlet of the water system through an outlet pipe. A portion of the pipes of the water system are arranged in the radiator. The water system is provided with a water pump for pumping the coolant in the cooling water plates after heat exchange with the battery cells into the water system. The inlets of the two cooling water plates are connected by a shunt pipe, and the inlet of the shunt pipe is connected to the outlet of the water system through an inlet pipe. The water inlet pipe is provided with a water supply pot for injecting new coolant into the water inlet pipe, and a pressure sensor for detecting the hydraulic pressure of the coolant in the water inlet pipe is provided at the connection between the water supply pot and the water inlet pipe; The radiator comprises a fan, a wind shield and heat sinks, and the fan and the heat sinks are sequentially arranged on the outer side of the wind shield from top to bottom.

2. The novel household liquid-cooled energy storage system according to claim 1 is characterized in that: The cooling water plate is bonded to the battery core by adhesive.

3. The novel household liquid-cooled energy storage system according to claim 1 is characterized in that: The cooling water plate is a U-shaped cooling water plate and an S-shaped cooling water plate.

4. The novel household liquid-cooled energy storage system according to claim 3 is characterized in that: The U-shaped cooling water plate includes a U-shaped water-cooling tube group, two first metal plates and a rectangular group. The U-shaped water-cooling tube group includes multiple U-shaped water-cooling tubes, each U-shaped water-cooling tube includes a first water tube and a second water tube, and the first water tube and the second water tube are connected by a first U-shaped bend tube; the inner surface of each first metal plate is provided with a U-shaped groove matching the U-shaped water-cooling tube; a water inlet cavity and a water outlet cavity are provided in the rectangular group, the water inlet cavity is connected to the first water tube through a first connecting tube; the water outlet cavity is connected to the second water tube through a second connecting tube; the water inlet cavity is connected to the diversion pipe through the water inlet pipe; the water outlet cavity is connected to the aggregation pipe through the water outlet pipe.

5. The novel household liquid-cooled energy storage system according to claim 4 is characterized in that: The two first metal plates are fixed by bolts.

6. The novel household liquid-cooled energy storage system according to claim 4 is characterized in that: The water inlet pipe and the diversion pipe are connected by plugging or snapping; the water outlet pipe and the collecting pipe are connected by plugging or snapping.

7. The novel household liquid-cooled energy storage system according to claim 4 is characterized in that: The first connecting pipe includes a first straight pipe and a first curved pipe, one end of the first straight pipe is connected to the water inlet chamber, and the other end is connected to the first curved pipe; the second connecting pipe includes a second straight pipe and a second curved pipe, one end of the second straight pipe is connected to the water outlet chamber, and the other end is connected to the second curved pipe.

8. The novel household liquid-cooled energy storage system according to claim 7 is characterized in that: The other end of the first straight tube is welded to the cuboid group, and the other end of the second straight tube is welded to the cuboid group.

9. The novel household liquid-cooled energy storage system according to claim 4 is characterized in that: One end of the water inlet pipe and the water outlet pipe are respectively welded to the rectangular parallelepiped group.

10. The novel household liquid-cooled energy storage system according to claim 3 is characterized in that: The S-shaped cooling water plate includes an S-shaped water-cooling pipe group, two second metal plates, a rectangular water inlet cavity and a rectangular water outlet cavity. The S-shaped water-cooling pipe group includes multiple S-shaped water-cooling pipes, each S-shaped water-cooling pipe includes a third water pipe, a fourth water pipe and a fifth water pipe, the third water pipe is connected to the fourth water pipe through a second U-shaped bend pipe, and the fourth water pipe is connected to the fifth water pipe through a second U-shaped bend pipe; the inner surface of the second metal plate is provided with an S-shaped groove matching the S-shaped water-cooling pipe; the third water pipe is vertically welded to the rectangular water inlet cavity, and the fifth water pipe is vertically welded to the rectangular water outlet cavity; one end of the rectangular water inlet cavity is provided with a water inlet; one end of the rectangular water outlet cavity is provided with a water outlet.

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