A temperature control system for household energy storage battery

Abstract

The utility model discloses a kind of temperature control systems for household energy storage battery, comprising: temperature control component and heat exchange component, the heat exchange component includes uniform temperature plate, heat exchanger and heat transfer plate, the uniform temperature plate is attached fixed in the side of the energy storage battery, the heat exchanger is fixed on the uniform temperature plate, the heat transfer plate is attached fixed in the intermediate position of heat exchanger outside side;The temperature control component includes heat dissipation plate, temperature control layer and heat conduction plate, the base plate one side of heat dissipation plate is provided with radiating fin, the other side is provided with heat conduction table, the temperature control layer is composed of multiple TEC modules, each TEC module one side surface is closely attached with the surface of heat conduction table other side surface and heat conduction plate closely attached, the surface of heat conduction plate far from the one side of temperature control layer is adhered with silica gel heat conduction pad.The utility model can accurately control battery operating temperature, reduce battery security risk, and simple structure, suitable for use in family scene.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment, and in particular to a temperature control system for household energy storage batteries. Background Technology

[0002] With the continued rise in energy prices, the demand for energy storage both domestically and internationally has increased rapidly, driving the overall energy storage industry's rapid growth. Among these, residential energy storage applications in home settings have also increased dramatically. In practical applications, residential energy storage devices mainly consist of five parts: photovoltaic arrays, grid-connected inverters, BMS management systems, lithium battery energy storage systems, and AC loads. Lithium batteries, as the energy storage unit of the entire residential energy storage system, can effectively improve the utilization efficiency of photovoltaic power generation and reduce users' electricity costs. However, due to the inherent characteristics of lithium batteries, they have relatively high requirements for operating temperature. Both high and low temperatures can significantly reduce battery life. Therefore, controlling the operating temperature of lithium batteries is a significant challenge for residential energy storage.

[0003] Currently, temperature control solutions for energy storage batteries generally employ either air cooling or liquid cooling systems for heat dissipation, using heating films for heating. However, in practical use, it has been found that air cooling systems have poor heat dissipation efficiency and uneven heat dissipation, resulting in significant temperature differences between individual batteries. While liquid cooling systems offer higher heat dissipation efficiency and more uniform heat distribution, their overall cost is higher, making them generally unsuitable for residential energy storage applications. Furthermore, the heating films used for heating are difficult to control precisely, easily leading to dry burning and localized overheating, thus posing safety risks to lithium batteries. Utility Model Content

[0004] The main technical problem solved by this utility model is to provide a temperature control system for household energy storage batteries, which can effectively improve the accuracy of temperature control, reduce the probability of lithium battery failure, and has a simple structure suitable for home application.

[0005] To solve the above-mentioned technical problems, the present invention provides a temperature control system for a household energy storage battery. The energy storage battery is composed of multiple cells. The temperature control system includes a temperature control component and a heat exchange component. The heat exchange component is mounted on the energy storage battery, and the temperature control component is mounted on the heat exchange component. The heat exchange component includes a heat spreader, a heat exchanger, and a heat transfer plate. The heat spreader is attached to one side of the energy storage battery, the heat exchanger is tightly fixed to the heat spreader, and the heat transfer plate is attached to the middle position of the outer side of the heat exchanger. The temperature control component includes a heat dissipation plate, a temperature control layer, and a heat-conducting plate. The heat sink and the heat conduction plate tightly sandwich the temperature control layer in the middle. The heat sink has heat dissipation fins on one side of its substrate and a heat conduction platform on the other side. The temperature control layer is composed of multiple TEC modules. Each TEC module has one surface tightly attached to the surface of the heat conduction platform and the other surface tightly attached to the heat conduction plate. The area of ​​the entire temperature control layer is no larger than the area of ​​the heat conduction platform. The area of ​​the heat conduction plate is the same as the area of ​​the heat conduction platform. A silicone thermal pad is adhered to the surface of the heat conduction plate away from the temperature control layer. When the temperature control component is installed on the heat exchange component, the silicone thermal pad is tightly attached to the surface of the heat transfer plate.

[0006] In a preferred embodiment of this utility model, the heat exchanger is a heat pipe heat exchanger, which includes multiple parallel heat exchange plates. The two ends of all heat exchange plates are connected together in series through a manifold. The number of heat exchange plates is the same as the number of cells that make up the energy storage battery. The inner side of all heat exchange plates is attached to the outer side of the heat spreader. The attachment position of each heat exchange plate corresponds to the side of a cell.

[0007] In a preferred embodiment of this invention, a control board mounting position is provided in the middle of the heat dissipation fins on the outer side of the heat sink, and the circuit control board of the TEC module is fixed on the control board mounting position. A cooling fan assembly is also provided on the outer side of the heat sink, consisting of two fans, each fan's mounting position aligned with the heat dissipation fins on one side of the control board mounting position.

[0008] In a preferred embodiment of this utility model, the thickness of the silicone thermal pad is 0.5mm to 1.5mm.

[0009] In a preferred embodiment of this utility model, the heat exchanger is connected to the heat spreader and the heat transfer plate by brazing.

[0010] In a preferred embodiment of this utility model, the heat spreader and the battery cell are bonded together by thermally conductive structural adhesive.

[0011] In a preferred embodiment of this invention, the TEC module is connected to the heat sink and the heat conduction plate via thermally conductive gel.

[0012] The beneficial effects of this utility model are: This utility model is an improvement on the existing battery temperature control scheme. By introducing the TEC module into the battery temperature control system, it not only realizes the cooling and heating functions of the battery at the same time, but also achieves an overall temperature control accuracy of up to ±1℃. It effectively eliminates the problems of uneven heat dissipation, dry burning and local overheating, reduces the safety hazards of lithium batteries, and has a simple overall structure and small footprint, making it very suitable for use in home settings. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention; Figure 2 This is an assembly diagram of the illustrated embodiment; Figure 3 This is a schematic diagram of the internal temperature control component of the TEC in the illustrated embodiment; Figure 4 This is a schematic diagram of the TEC external temperature control component structure in the illustrated embodiment; The components in the attached diagram are labeled as follows: 1. Energy storage battery; 2. Heat exchange component; 3. Temperature control component; 201. Heat transfer plate; 202. Heat spreader plate; 203. Heat exchanger plate; 204. Manifold. 301.TEC module, 302. Heat-conducting plate, 303. Silicone heat-conducting pad, 304. Heat sink, 3041. Substrate, 3042. Heat sink fins, 3043. Heat-conducting platform, 3044. Control board mounting position, 305. Circuit control board, 306. Cooling fan assembly. Detailed Implementation

[0014] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0015] Please see Figures 1 to 4 The embodiments of this utility model include: A temperature control system for a residential energy storage battery, wherein the energy storage battery 1 is composed of multiple cells, and the temperature control system includes a temperature control component 3 and a heat exchange component 2. The heat exchange component 2 is mounted on the energy storage battery 1, and the temperature control component 3 is mounted on the heat exchange component 2. The heat exchange component 2 includes a heat spreader 202, a heat exchanger, and a heat transfer plate 201. The heat spreader 202 is attached and fixed to one side of the energy storage battery 1 by thermally conductive adhesive. The heat exchanger is tightly fixed to the heat spreader 201 by brazing, and the heat transfer plate 201 is fixed to the middle position of the outer side of the heat exchanger by brazing. The temperature control component includes a heat sink 304, a temperature control layer, and a heat conduction plate 302, wherein the heat sink 304 and the heat conduction plate 302 tightly clamp the temperature control layer. In the middle, heat dissipation fins are provided on one side of the substrate 3041 of the heat sink 304, and a heat conduction platform 3043 is provided on the other side. The temperature control layer is composed of multiple TEC modules 301. Each TEC module 301 has one side surface tightly bonded to the surface of the heat conduction platform 3043 by thermal conductive gel, and the other side surface tightly bonded to the heat conduction plate 302 by thermal conductive gel. The area of ​​the entire temperature control layer is not greater than the area of ​​the heat conduction platform 3043. The area of ​​the heat conduction plate 302 is the same as the area of ​​the heat conduction platform 3043. A silicone thermal conductive pad 303 is adhered to the surface of the heat conduction plate 302 away from the temperature control layer. When the temperature control component 3 is installed on the heat exchange component 1, the silicone thermal conductive pad 303 is tightly attached to the surface of the heat transfer plate 201.

[0016] The heat exchanger is a heat pipe heat exchanger, which includes multiple parallel heat exchange plates 203. The two ends of each heat exchange plate 203 are connected together in series through a manifold 204. The number of heat exchange plates 203 is the same as the number of cells that make up the energy storage battery 1. The inner side of each heat exchange plate 203 is fixed to the outer side of the heat spreader 202 by brazing. The fixed position of each heat exchange plate 203 corresponds to the side of a cell. Both the manifold 204 and the heat exchange plate 203 of the heat pipe heat exchanger are filled with a dedicated heat exchange fluid. In actual use, when any heat exchange plate 203 is heated, the internal heat exchange fluid automatically circulates, evenly distributing the heat through the manifold 204 to all the heat exchange plates 203. This method allows for rapid heat transfer from each battery cell via the heat spreader 202 and the circulating heat exchange fluid to the heat exchange plate 203, which is tightly attached to the heat transfer plate 201. Then, the heat is transferred sequentially through the silicone thermal pad 303 and the thermal plate 302 to the TEC module 301. At this time, the TEC module 301 is in cooling mode; the side attached to the thermal plate 302 is the cooling side, and the side connected to the heat sink 304 is the heating side. The heat transferred from the heat-conducting plate 302 is quickly absorbed. When the battery cell needs to be heated, the control circuit of the TEC module 301 is reversed to switch to heating mode. At this time, the side connected to the heat sink 304 becomes the cooling side, and the side connected to the heat-conducting plate 302 becomes the heating side. In this way, the heat is conducted through the heat-conducting plate 302, the silicone thermal pad 303 and the heat transfer plate 201 to the heat exchange plate 203 attached to the heat transfer plate 201. The heat exchange fluid in the heat exchange plate 203 automatically circulates and evenly conducts the heat to the other heat exchange plates 203. Each heat exchange plate 203 heats the temperature distribution plate 202 at the same time, and the temperature distribution plate 202 heats the corresponding battery cell. Moreover, since each heat exchange plate 202 is aligned with one battery cell, the heating speed for each battery cell can be significantly improved.

[0017] A control board mounting position 3044 is provided in the middle of the heat dissipation fins 3042 on the outer side of the heat sink 304, and the circuit control board 305 of the TEC module 301 is fixed on the control board mounting position 3044. In this way, the circuit control board 305 is integrated into the entire temperature control system, and the upper surface temperature of the TEC module 301 is prevented from being too high when executing the cooling command, which would affect the lifespan of the circuit control board 305.

[0018] A cooling fan assembly 306 is also provided on the outer side of the heat sink 304. The cooling fan assembly 306 consists of two fans, each of which is installed with its position aligned with the heat sink fins 3042 on one side of the control board mounting position 3044. In this way, when the TEC module 301 executes a cooling command, the heat dissipation efficiency of the heat sink 304 can be improved by the fans, preventing the TEC module 301 from overheating.

[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A temperature control system for a household energy storage battery, wherein the energy storage battery is composed of multiple cells, characterized in that, The temperature control system for the household energy storage battery includes a temperature control component and a heat exchange component, wherein the heat exchange component is installed on the energy storage battery and the temperature control component is installed on the heat exchange component; The heat exchange assembly includes a temperature distribution plate, a heat exchanger, and a heat transfer plate. The temperature distribution plate is attached to and fixed to one side of the energy storage battery, the heat exchanger is tightly fixed to the temperature distribution plate, and the heat transfer plate is attached to and fixed to the middle position of the outer side of the heat exchanger. The temperature control component includes a heat sink, a temperature control layer, and a heat conduction plate. The heat sink and the heat conduction plate tightly sandwich the temperature control layer in the middle. The heat sink has heat dissipation fins on one side of its substrate and a heat conduction platform on the other side. The temperature control layer is composed of multiple TEC modules. Each TEC module has one surface tightly attached to the surface of the heat conduction platform and the other surface tightly attached to the heat conduction plate. The area of ​​the entire temperature control layer is no larger than the area of ​​the heat conduction platform. The area of ​​the heat conduction plate is the same as the area of ​​the heat conduction platform. A silicone thermal pad is adhered to the surface of the heat conduction plate away from the temperature control layer. When the temperature control component is installed on the heat exchange component, the silicone thermal pad is tightly attached to the surface of the heat transfer plate.

2. The temperature control system for household energy storage batteries according to claim 1, characterized in that, The heat exchanger is a heat pipe heat exchanger, which includes multiple parallel heat exchange plates. Each end of the heat exchange plates is connected in series through a manifold. The number of heat exchange plates is the same as the number of cells that make up the energy storage battery. The inner side of all heat exchange plates is attached to the outer side of the heat spreader. The attachment position of each heat exchange plate corresponds to the side of a cell.

3. The temperature control system for household energy storage batteries according to claim 1, characterized in that, A control board mounting position is provided in the middle of the heat dissipation fins on the outer side of the heat dissipation plate, and the circuit control board of the TEC module is fixed in the control board mounting position.

4. The temperature control system for household energy storage batteries according to claim 3, characterized in that, The heat sink is also provided with a cooling fan assembly on the outside. The cooling fan assembly consists of two fans, and the installation position of each fan is aligned with the heat sink fins on one side of the control board mounting position.

5. The temperature control system for household energy storage batteries according to claim 1, characterized in that, The thickness of the silicone thermal pad is 0.5mm to 1.5mm.

6. The temperature control system for household energy storage batteries according to claim 1, characterized in that, The heat exchanger is connected to the heat spreader and the heat transfer plate by brazing.

7. The temperature control system for household energy storage batteries according to claim 1, characterized in that, The heat spreader plate and the battery cell are bonded together with thermally conductive structural adhesive.

8. The temperature control system for household energy storage batteries according to claim 1, characterized in that, The TEC module is connected to the heat sink and the heat conduction plate via thermally conductive gel.

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