Energy storage box with heating and heat preservation functions

Abstract

The utility model discloses an energy storage box with heating and heat preservation functions, which belongs to the technical field of battery energy storage and comprises a box body, the box body is formed by combining a door body and a plate body, the door body and the plate body are both of a heating and heat preservation composite structure, and the heating and heat preservation composite structure sequentially comprises an outer protective layer, a heat preservation flame retardant layer, a heating element layer and a lining layer from outside to inside. The outer protection layer and the lining layer jointly form a containing cavity, and the heat preservation flame-retardant layer and the heating element layer are arranged in the containing cavity; therefore, the door body and the plate body which form the box body are improved, the door body and the plate body are both designed to be of a heating and heat preservation composite structure, the heating element layer is used for heating, and the heat preservation flame-retardant layer is matched, so that the problems that a battery cell cannot be charged and discharged in a low-temperature environment and a lithium precipitation phenomenon is likely to occur are well solved; and the service life and the safety performance of the battery cell in the energy storage box are improved, the defects in the prior art are overcome, and certain economic benefits and popularization prospects are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the battery energy storage technology field especially, it relates to a kind of energy storage box with heating and heat preservation function. BACKGROUND

[0002] Energy storage power station plays a very important role in supplementing power for power grid and adjusting the peak and valley of power grid, when load is low or not limited, intermittent renewable energy or power grid charges energy storage system, when load is high or limited, energy storage device discharges to power grid as standby capacity, plays the role of peak clipping and valley filling and use.

[0003] At present, the low-temperature lower limit of traditional energy storage device is generally above-40 ℃ of ambient temperature, if the ambient temperature is lower than-40 ℃, related device cannot run, especially the internal battery cell, when the ambient temperature is lower than 40 ℃, not only can not carry out charge and discharge, affect normal use, and lithium precipitation phenomenon easily occurs, increase the security risk of battery use.

[0004] Therefore, based on the above phenomenon, design a scheme that can effectively heat preservation treatment to battery cell is the technical problem to be solved urgently of the present application. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind of energy storage box with heating and heat preservation function to solve the heat preservation problem of battery cell in energy storage box, prevent too low temperature to make battery cell cannot normally work and produce lithium precipitation phenomenon, improve the life and safety performance of battery cell in energy storage box.

[0006] The present application provides a kind of energy storage box with heating and heat preservation function, including box, the box is combined by door body and board body, the door body and board body are all heating and heat preservation composite structure, the heating and heat preservation composite structure is successively included outer protective layer, heat preservation flame-retardant layer, heating element layer and inner lining layer from outside to inside, the outer protective layer and inner lining layer jointly form a containing cavity, the heat preservation flame-retardant layer and heating element layer are set in the containing cavity.

[0007] As a preferred scheme of the present application: the heat preservation flame-retardant layer includes heat preservation material and flame-retardant material, the heat preservation material is set on the side close to the outer protective layer, the flame-retardant material is set between the heat preservation material and the heating element layer.

[0008] As a preferred scheme of the present application: the heat preservation material is any one or more than two composite materials of polyurethane foaming, polystyrene foam, extruded polystyrene, aluminum silicate fiber.

[0009] As a preferred scheme of the present application: the flame-retardant material is any one or composite material of two of rock wool and aluminum silicate fiber.

[0010] As a preferred scheme of the present application: the heating elements in the heating element layer comprise any one of heating blankets or heating belts.

[0011] As a preferred scheme of the present application: when the heating element is a heating blanket, the size of the heating blanket corresponds to the size of the inner lining layer, and the heating blanket is laid flat and attached to the inner side panel of the entire inner lining layer; when the heating element is a heating belt, the heating belt is wound equidistantly or arranged in multiple equidistant segments to form a disc belt structure corresponding to the size of the inner lining layer, and the disc belt structure is attached to the inner side panel of the entire inner lining layer.

[0012] As a preferred scheme of the present application: the box body comprises at least a battery compartment, an electrical compartment, a liquid cooling compartment and a fire-fighting compartment, the electrical compartment is arranged close to the battery compartment, the liquid cooling compartment and the fire-fighting compartment are arranged side by side along the width direction of the box body and close to the end of the box body, and the liquid cooling compartment is internally provided with a liquid cooling unit which is in communication with the cooling system of the battery pack in the battery compartment to transfer heat.

[0013] As a preferred scheme of the present application: air heaters are arranged in at least the battery compartment, the electrical compartment and the fire-fighting compartment, the air heater comprises an electric heating element, a heat dissipation element and a control element, the control element is connected to the electrical compartment, the electric heating element can generate heat energy, and the heat dissipation element can release the heat energy to the outside to heat air.

[0014] As a preferred scheme of the present application: the heat dissipation element is a fan, that is, the air heater is a fan heater, and the fan heater is specifically a TX030-CR series fan heater.

[0015] As a preferred scheme of the present application: the outer protective layer and the inner lining layer are both steel plates.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The door body and the plate body constituting the box body are improved in the present application, and the door body and the plate body are both designed as a heating and heat preservation composite structure which comprises, from outside to inside, an outer protective layer, a heat preservation and flame retardant layer, a heating element layer and an inner lining layer. The heating element layer is used for heating, and the heat is transferred to the inside of the box body in a heat radiation mode to rapidly increase the temperature of the compartments in the box body. In combination with the heat preservation and flame retardant layer, the safety of the composite structure can be improved, the heat energy loss can be reduced, and the heat preservation function can be achieved. The heat preservation scheme of the present application has excellent performance. In a low temperature (-60℃) environment, the heating of the box body wall can effectively improve the problem of the compartments in the energy storage box, and thus the battery pack can be heated and preserved. The problem that the battery cells cannot be charged and discharged and are prone to lithium precipitation in a low temperature (-60℃) environment is solved, the service life and safety performance of the battery cells in the energy storage box are improved, the existing deficiencies are solved, and the present application has certain economic benefits and promotion prospects. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The whole structure schematic diagram of the energy storage box with heating and heat preservation functions provided by the embodiment of the utility model.

[0019] Figure 2 The front view structure schematic diagram of the double door body provided by the embodiment of the utility model.

[0020] Figure 3 The embodiment of the utility model provides Figure 2 The sectional structure schematic diagram along A-A direction.

[0021] Figure 4 The embodiment of the utility model provides Figure 3 The local enlarged schematic diagram of A place.

[0022] Figure 5 The embodiment of the utility model provides the layout mechanism schematic diagram of the heating element on the plate body or door body when the heating element is multi-section heating belt.

[0023] Figure 6 The inside overhead structure schematic diagram of the energy storage box provided by the embodiment of the utility model.

[0024] Reference signs

[0025] 100 is the box body, 101 is the double door, 102 is the end plate, 103 is the single door, 104 is the liquid cooling unit door A, 105 is the liquid cooling unit door B, 106 is the top plate, 107 is the bottom plate, 201 is the outer protective layer, 202 is the heat preservation material, 203 is the fire -retardant material, 204 is the heating element layer, 205 is the inner lining, 206 is the heating element, 301 is the battery cabin, 302 is the electrical cabin, 303 is the liquid cooling cabin, 304 is the fire fighting cabin, 401 is the air heater. DETAILED DESCRIPTION

[0026] The utility model will be further explained in detail in combination with specific implementation and by referring to the drawings, and it should be emphasized that the following description is only exemplary and is not used as the limitation of the range and application of the utility model.

[0027] As Figure 1As shown, the energy storage tank provided by the embodiment has a heating and heat preservation function, comprising a tank body 100, which is combined by a door body and a plate body. The door body comprises double doors 101 and single doors 103, and the plate body comprises bottom plates 107, end plates 102 and top plates 106. The door body and the plate body are designed as a heating and heat preservation composite structure, that is, the entire peripheral side wall of the tank body 100 is designed as a heating and heat preservation composite structure. The heating and heat preservation composite structure comprises an outer protective layer 201, a heat preservation and flame retardant layer, a heating element layer 204 and an inner lining layer 205 from outside to inside. The outer protective layer 201 and the inner lining layer 205 form a containing cavity together, and the heat preservation and flame retardant layer and the heating element layer 204 are arranged in the containing cavity. In the embodiment, the outer protective layer 201 and the inner lining layer 205 are preferably steel plates, which not only constitute the overall framework of the door body and the plate body, but also form the outer shape structure. Through the firmness and stability of the steel plate, the door body and the plate body can be protected and supported with high strength, ensuring the durability and safety of the overall structure of the door body and the plate body. The heating element layer 204 uses a heating element 206 as a heat source, which is fixed on the inner side of the inner lining layer 205 by pasting or binding, and is used to generate heat and transfer to the tank body 100 in a heat radiation mode to quickly increase the temperature of the cabin in the tank body 100. It can be understood that the power of the heating element 206 can be selected according to actual needs to ensure that the required temperature can be provided in a certain low temperature environment (preferably -60℃ in the embodiment). Of course, in addition to the selection of power, the arrangement of the heating element 206 should also meet the demand of providing uniform heat radiation.

[0028] In summary, the heating element 206 is used to transfer heat energy to the tank body 100 in a heat radiation mode to quickly heat the cabin in the tank body 100, and the heat preservation and flame retardant layer is used to not only improve the safety of the composite structure, but also reduce heat loss and play a heat preservation function. It can be seen that the tank heat preservation scheme of the embodiment has excellent performance. In a low temperature (-60℃) environment, the heating of the tank body 100 wall can effectively improve the cabin in the energy storage tank, and then realize the heat preservation and heating treatment of the battery pack, which solves the problems of battery cells that cannot be charged and discharged and are prone to lithium precipitation in a low temperature (-60℃) environment. The service life and safety performance of the battery cells in the energy storage tank are improved, the existing deficiencies are solved, and the energy storage tank has certain economic benefits and promotion prospects.

[0029] The heating elements 206 in the heating element layer 204 include any of heating blankets or heating belts. When the heating elements 206 are heating blankets, the size of the heating elements 206 corresponds to the size of the inner lining layer 205, and the heating elements 206 are preferably laid flat and attached to the inner side panel of the entire inner lining layer 205 by adhesion. When the heating elements 206 are heating belts, the heating belts are wound equidistantly or arranged in multiple segments to form a disc belt structure corresponding to the size of the inner lining layer 205, and the disc belt structure is preferably attached to the inner side panel of the entire inner lining layer 205 by adhesion, as shown in Figure 5 The heating elements 206 are laid flat and attached to the inner side panel of the entire inner lining layer 205. This can improve the uniformity of heat radiation and increase the heating speed, thereby meeting the heating requirements.

[0030] In this embodiment, the heating elements 206 are preferably heating blankets that are easy to lay. The specific model can be selected according to actual conditions, as long as the heating blanket can meet the low-temperature resistance requirement.

[0031] It can be understood that, according to the required temperature, the heating elements 206 provided on the door body and the plate body can be started simultaneously, or only the heating elements 206 provided on the door body or only the heating elements 206 provided on the plate body can be started according to requirements.

[0032] The heat-retaining and flame-retardant layer includes a heat-retaining material 202 and a flame-retardant material 203, i.e., the heat-retaining and flame-retardant layer is a composite material composed of the heat-retaining material 202 and the flame-retardant material 203. The heat-retaining material 202 is arranged on the side close to the outer protective layer 201, and the flame-retardant material 203 is arranged between the heat-retaining material 202 and the heating element layer 204. As shown in Figures 2-4 As shown in Figure 4It can be seen that the thermal insulation material 202 is fixed on the inner wall of the outer protective layer 201 by coating, pasting, screwing or binding, and the flame retardant material 203 is arranged between the thermal insulation material 202 and the heating element layer 204. The flame retardant material 203 is thicker than the thermal insulation material 202. It can be directly fixed on the thermal insulation material 202 by bonding, or it can be tightly fixed to the thermal insulation material 202 by fixing columns arranged on the inner wall of the outer protective layer 201. The specific details can be determined according to actual installation requirements and the structure of the outer protective layer 201. This embodiment is not specifically limited here to ensure that the thermal insulation material 202 and the flame retardant material 203 are tightly fitted and firmly connected to the outer protective layer 201; the heating blanket is located between the lining layer 205 and the flame retardant material 203 and is tightly fitted with the two. This design mechanism is conducive to the transfer of heat energy to the inner cabin of the box body 100, and can also improve the safety of the use of the heating blanket and reduce safety hazards.

[0033] The thermal insulation material 202 is any one of polyurethane foam, polystyrene foam, extruded polystyrene, aluminum silicate fiber, or a composite material of two or more thereof. In this embodiment, polyurethane foam is preferably used, which is coated on the inner side of the outer protective layer 201 .

[0034] The flame retardant material 203 is a composite material of either one or both of rock wool and aluminum silicate fiber. In this embodiment, rock wool is preferred.

[0035] like Figure 6 As shown in the figure, it is a schematic diagram of the internal structure of the box body 100 provided in this embodiment. As can be seen from the figure, the internal compartment of the box body 100 is divided into a battery compartment 301, an electrical compartment 302, a liquid cooling compartment 303 and a fire compartment 304. Among them, the battery compartment 301 is used to place electrical equipment such as a junction box and a distribution cabinet. It is arranged near the battery compartment 301 to facilitate electrical connection with the battery clusters in the battery compartment 301. The liquid cooling compartment 303 and the fire compartment 304 are arranged side by side along the width direction of the box body 100 and are located near the end of the box body 100. , a liquid cooling unit is installed in the liquid cooling chamber 303, and the liquid cooling unit is connected to the cooling system of the battery pack in the battery compartment 301 to transfer heat and then cool down the battery cells in the battery pack to avoid the influence of high temperature on the battery cells; it should be noted that the door body also includes a liquid cooling unit door, specifically a liquid cooling unit door A104 and a liquid cooling unit door B105 are opened at the position corresponding to the box body and the liquid cooling chamber 303, and the liquid cooling unit door A104 and the liquid cooling unit door B105 are opened and closed by a low-temperature resistant push rod.

[0036] Specifically, the battery pack will heat up due to operation even in a low-temperature environment, and therefore, when the heating element 206 is used to heat the inner cabin of the energy storage box, the temperature of each battery cell in the battery cabin 301 needs to be concerned to avoid overheating. In the specific use of the present embodiment, the heating element 206 is used to heat the inner cabin of the energy storage box first, and if necessary (when the temperature is below-20℃), the liquid cooling unit is started to cool each battery pack in the inner cabin of the battery, that is, the present embodiment can provide a suitable temperature environment for each battery pack through the heating and insulation composite structure cooperating with the liquid cooling unit to ensure the effective and normal operation of the battery pack and avoid unnecessary damage or safety incidents caused by overheating.

[0037] At least air heaters 401 are arranged in the battery cabin 301, the electrical cabin 302 and the fire-fighting cabin 304, as shown in the figure, the number of air heaters 401 can be selected according to actual needs, which is not limited in the present embodiment. The air heater 401 includes an electric heating element, a heat dissipation element and a control element. The control element is connected to the electrical cabin 302, the electric heating element can generate heat energy, and the heat dissipation element can release the heat energy to the outside to heat the air. In the present embodiment, the heat dissipation element is a fan, that is, the air heater 401 is a fan heater, which uses a TX030-CR series fan heater. The heater can normally operate in a temperature range of-20℃ to +40℃, which meets the low-temperature requirement of the present embodiment. In addition, the heater has a small size and a large rated power, which meets the heating requirement of the energy storage box. Figure 6

[0038] The air heater 401 can not only heat the electrical cabin 302 and the fire-fighting cabin 304 where it is located to ensure that the electrical equipment and the fire-fighting equipment are in a suitable temperature environment in a low-temperature environment, but also can heat the entire inner cabin of the box body 100 alone or in conjunction with the heating element 206 to make the temperature of the entire inner cabin of the box body 100 meet the temperature requirement of the battery cell.

[0039] In the specific use of the present embodiment, the corresponding temperature control device can be selectively used according to the outdoor temperature environment:

[0040] Environment one: when the outdoor temperature is-60℃ to-40℃, the heating elements 206 on the door body and the plate body are started at the same time, and the air heater 401 is started, and the two work together to heat the inner cabin of the box body 100 to provide a suitable temperature for the battery cell in the battery cabin 301;

[0041] ​Environment two: when the outdoor temperature is -40℃ to -20℃, start the air heater 401 and the liquid cooling unit, heat the cabin in the box 100 by the air heater 401, and cooperate with the liquid cooling unit to cool the battery cell, so as to ensure that the battery cell is in a suitable temperature environment; in the embodiment, if the outdoor temperature is warmed from environment one to -40℃ to -20℃, the heating element 206 is closed while the air heater 401 and the liquid cooling unit continue to run.

[0042] Environment three: when the outdoor temperature is -20℃ to 0℃, only start the air heater 401 and the liquid cooling unit, heat the cabin in the box 100 by the air heater 401, and cooperate with the liquid cooling unit to cool the battery cell, so as to ensure that the battery cell is in a suitable temperature environment.

[0043] Environment four: when the outdoor temperature is above 0℃, only start the liquid cooling unit to cool the battery cell, so as to ensure that the battery cell is in a suitable temperature environment.

[0044] The above is a preferred selection method of the temperature control device in the embodiment, and the selection method can be adjusted according to actual needs, so as to ensure that the battery cell is in a suitable temperature environment.

[0045] The above is only an embodiment of the utility model, and the well-known specific structure and characteristics in the scheme are not described in detail. It should be pointed out that for those skilled in the art, some improvements can be made without departing from the utility model, and these should also be regarded as the protection range of the utility model, which will not affect the effect and practicability of the utility model. The protection range of the application should be subject to the content of the claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. An energy storage box with heating and heat preservation functions, comprising a box body, the box body being composed of a door body and a plate body, characterized in that: The door body and the panel body are both heating and heat-insulating composite structures, which include an outer protective layer, a heat-insulating and flame-retardant layer, a heating element layer and an inner lining layer from the outside to the inside. The outer protective layer and the inner lining layer together form a accommodating cavity, and the heat-insulating and flame-retardant layer and the heating element layer are arranged in the accommodating cavity.

2. The energy storage box with heating and heat preservation functions according to claim 1, characterized in that: The heat-insulating and flame-retardant layer comprises a heat-insulating material and a flame-retardant material. The heat-insulating material is arranged on a side close to the outer protective layer, and the flame-retardant material is arranged between the heat-insulating material and the heating element layer.

3. The energy storage box with heating and heat preservation functions according to claim 2, characterized in that: The thermal insulation material is any one of polyurethane foam, polystyrene foam, extruded polystyrene, and aluminum silicate fiber, or a composite material of two or more thereof.

4. The energy storage box with heating and heat preservation functions according to claim 2, characterized in that: The flame retardant material is a composite material of either one or both of rock wool and aluminum silicate fiber.

5. The energy storage box with heating and heat preservation functions according to claim 1, characterized in that: The heating elements in the heating element layer include any one of a heating blanket and a heating tape.

6. The energy storage box with heating and heat preservation functions according to claim 5, characterized in that: When the heating element is a heating blanket, its size corresponds to the size of the inner lining layer, and it is flat and fits on the inner side panel of the entire inner lining layer; when the heating element is a heating belt, it is equidistantly coiled or multiple sections are equidistantly arranged to form a coiled belt structure corresponding to the size of the inner lining layer, and the coiled belt structure fits on the inner side panel of the entire inner lining layer.

7. The energy storage box with heating and heat preservation functions according to claim 1, characterized in that: The box body contains at least a battery compartment, an electrical compartment, a liquid cooling compartment and a fire compartment. The electrical compartment is arranged near the battery compartment. The liquid cooling compartment and the fire compartment are arranged side by side along the width direction of the box body and are located near the end of the box body. The liquid cooling compartment has a built-in liquid cooling unit, which is connected to the cooling system of the battery pack in the battery compartment for heat transfer.

8. The energy storage box with heating and heat preservation functions according to claim 7, characterized in that: An air heater is provided at least in the battery compartment, electrical compartment and fire compartment. The air heater comprises an electric heating element, a heat dissipation element and a control element. The control element is connected to the electrical compartment. The electric heating element can generate heat energy, and the heat dissipation element can release the heat energy to the outside to heat the air.

9. The energy storage box with heating and heat preservation functions according to claim 8, characterized in that: The heat dissipation element is a fan, that is, the air heater is a fan heater, specifically a TX030-CR series fan heater.

10. The energy storage box with heating and heat preservation functions according to claim 1, characterized in that: The outer protective layer and the inner lining layer are both steel plates.

Images