CN-122025913-A - Heat dissipation system and heat dissipation capacity calculation method for high-pressure energy storage container

Abstract

The invention relates to a high-pressure energy storage container heat radiation system, which comprises a container, a liquid cooling device and an air cooling device, wherein a battery core and a power module are arranged in the container, the liquid cooling device consists of a main water inlet pipeline, a main water outlet pipeline, a battery core liquid cooling plate and a module liquid cooling plate, the battery core is fixed on the battery core liquid cooling plate, and the power module is fixed on the module liquid cooling plate. The liquid cooling heat dissipation capacity calculation method comprises the steps of a), obtaining heating power of a battery cell and a module, b), calculating heat absorption power of the battery cell, c), calculating heat absorption power of a liquid cooling plate of the battery cell, d), calculating heat absorption power of the liquid cooling plate of the module, e), calculating power required by liquid cooling heat dissipation, and f), calculating flow of a liquid cooling medium. The high-voltage energy storage container heat dissipation system and the method realize the temperature uniformity of the battery cell and the power module, solve the problem of larger flow of the existing cooling medium, ensure that the selected heat dissipation equipment model is not larger, and reduce the liquid cooling cost.

Inventors

• YAO HAIJIA
• ZHOU GUANGCHENG
• KONG LELE
• LI DELU
• WANG GUANGZHONG
• ZHANG ZHENYU
• ZHAO ZHONGWEN

Assignees

• 新风光电子科技股份有限公司

Dates

Publication Date

20260512

Application Date

20260402

Claims (4)

1. 1. The high-pressure energy storage container heat dissipation system comprises a container (1), a liquid cooling device and an air cooling device, wherein an electric core (10) and a power module (11) are arranged in the container, the electric core is used for storing electric energy, the power module is used for controlling the discharging process of the electric core, the liquid cooling device is used for dissipating heat of the electric core and the power module, the air cooling device is used for dissipating heat of an internal cavity of the container, and the air cooling device is composed of a refrigerating air conditioner (12) fixed on the container (1), and is characterized in that the liquid cooling device is composed of a main water inlet pipeline (2), a main water outlet pipeline (3), an electric core liquid cooling plate (8) and a module liquid cooling plate (9), the electric core is fixed on the electric core liquid cooling plate, the power module is fixed on the module liquid cooling plate, the main water inlet pipeline and the main water outlet pipeline are respectively positioned at the bottom and the upper part of the internal cavity of the container, and the electric core liquid cooling plate and the module liquid cooling plate are positioned between the main water inlet pipeline and the main water outlet pipeline; The main water inlet pipeline is uniformly provided with a plurality of vertical secondary water inlet pipelines (4) communicated with the main water inlet pipeline, the secondary water inlet pipeline is uniformly provided with a plurality of transverse small branch water inlet pipelines (5) communicated with the secondary water inlet pipeline, the main water outlet pipeline is uniformly provided with a plurality of vertical secondary water outlet pipelines (6) communicated with the main water outlet pipeline, the secondary water outlet pipeline is uniformly provided with a plurality of small branch water outlet pipelines (7) communicated with the secondary water outlet pipeline, the small branch water inlet pipelines are communicated with the water inlet of the electric core liquid cooling plate or the module liquid cooling plate, and the small branch water inlet pipelines are communicated with the water outlet of the electric core liquid cooling plate or the module liquid cooling plate.
2. 2. The heat radiation system of high-pressure energy storage container as set forth in claim 1, wherein the number of secondary water inlet pipelines (4) and secondary water outlet pipelines (6) is 8, and the number of small branch water inlet pipelines (5) on each secondary water inlet pipeline and the number of small branch water outlet pipelines (7) on each secondary water outlet pipeline are 8.
3. 3. A liquid cooling heat dissipation capacity calculation method based on the high-pressure energy storage container heat dissipation system as defined in claim 1, characterized by comprising the following steps of: a) Acquiring total heating power of all the electric cores according to parameters and quantity of the electric cores (10), and recording as S1, and acquiring total heating power of all the power modules (11) according to parameters and quantity of the power modules (11), and recording as S2; b) Calculating heat absorption power of the electric cores, setting the number of the electric cores as n1, setting the mass of a single electric core as m1, setting the specific heat capacity of an electric core material as C1, setting the maximum design temperature rise of the electric core as DeltaT 1, setting the charging duration of a high-voltage energy storage container as Deltat 1 and the discharging duration as Deltat 2, and calculating the heat absorption power P1 of all the electric cores through a formula (1): (1) c) The method comprises the steps of calculating heat absorption power of the electric core liquid cooling plates, setting the number of the electric core liquid cooling plates as n2, setting the mass of each electric core liquid cooling plate as m2, setting the specific heat capacity of materials adopted by the electric core liquid cooling plates as C2, setting the design temperature rise of the electric core liquid cooling plates as delta T2, and calculating the heat absorption power P2 of the electric core liquid cooling plates through a formula (2): (2) d) The method comprises the steps of calculating the heat absorption power of the module liquid cooling plates, setting the number of the module liquid cooling plates as n3, setting the mass of a single module liquid cooling plate as m3, setting the specific heat capacity of materials adopted by the module liquid cooling plates as C3, setting the design temperature rise of the module liquid cooling plates as DeltaT 3, and calculating the heat absorption power P3 of the module liquid cooling plates through a formula (3): (3) e) Calculating the power required by liquid cooling heat dissipation, and calculating the power required by liquid cooling heat dissipation P according to a formula (4): (4) f) Calculating the flow V of the required liquid cooling medium; (5) Wherein P is the power required by liquid cooling heat dissipation, C3 is the specific heat capacity of the liquid cooling medium, ρ is the specific heat capacity of the liquid cooling medium, and DeltaT 4 is the design temperature rise of the hot cooling medium.
4. 4. A method for calculating air cooling heat dissipation capacity based on the high-pressure energy storage container heat dissipation system as defined in claim 1, characterized by comprising the following steps: 1) Calculating the temperature of the outer surface of the container, wherein the outer surface of the container has heat convection and solar radiation with the environment, and the temperature Tb of the outer surface of the container is calculated according to a formula (6): (6) wherein ks is the heat conductivity coefficient of the container heat-insulating layer, tn is the set temperature of the air in the container, deltays is the thickness of the container heat-insulating layer, hc is the heat-exchanging coefficient of the outer surface of the container, and TA is the external environment temperature; 2) Calculating the surface area of the container, and calculating the surface area A of the container by the formula (7) by setting the length, width and height of the container as l, w and h respectively: (7) 3) Calculating the heat transfer power of the external environment, and calculating the heat transfer power Sa of the external environment to the container according to the formula (8): (8) 4) Calculating heat transfer power of solar radiation, setting the included angle between the solar ray at the container position and the vertical line as alpha, and setting the solar absorptivity at the container surface as alpha The solar radiation intensity is I, the length direction of the container is set along the east-west direction, and the heat transfer power Sf of the solar radiation to the container is calculated according to the formula (9): (9) Wherein S1 is the area of the outer side surface of the container facing the sun, S2 is the area of the upper surface of the container, ; 5) Acquiring other heat source items, namely acquiring the total heating power of the capacitor, the copper bar and the reactor in the high-voltage energy storage container, and recording the total heating power as S Others ; 6) Calculating the total refrigerating power, and calculating the refrigerating power S Refrigerating system required by the refrigerating air conditioner according to the formula (10): (10)。

Description

Heat dissipation system and heat dissipation capacity calculation method for high-pressure energy storage container Technical Field The present invention relates to a heat dissipating system and a heat dissipating capacity calculating method, and more particularly, to a heat dissipating system and a heat dissipating capacity calculating method for a high-pressure energy storage container. Background The power of the cascade high-voltage energy storage device determines the heat dissipation capacity, and the high-power high-voltage energy storage device requires larger heat dissipation capacity so as to maintain the temperature of a battery cell and a power module in the energy storage device within a design temperature range and ensure the stable operation of the energy storage device. For most high-voltage energy storage equipment, the heat dissipation mode is usually a heat dissipation system with liquid cooling and air cooling combined, namely, a liquid cooling pipeline is utilized to conduct forced convection heat exchange on a battery cell and a power module, and an air conditioner is utilized to adjust the influence of the environmental temperature on the heat dissipation of the whole container, so that the effect of effective heat dissipation is achieved. The design of the liquid cooling pipeline plays a decisive role in heat dissipation of the battery cell, and only reasonable pipeline design can ensure even flow of liquid cooling medium in the pipeline and the liquid cooling plate, thereby ensuring good heat dissipation effect. The battery cells have higher requirements on the temperature uniformity, and the temperature difference between each battery cell cannot be too large, so that the service life of the battery cells can be influenced, and the performance of the battery cells can not be normally exerted. Therefore, for the container type high-pressure energy storage device adopting liquid cooling and air cooling combined heat radiation, the heat radiation design of liquid cooling and air cooling is guaranteed to meet the operation requirement, the cost improvement caused by overlarge type of heat radiation equipment is avoided, the required heat radiation amount is accurately calculated, the flow of a cooling medium and the refrigerating power of an air conditioner are calculated according to the required heat radiation amount, but the heat absorption amount of a liquid cooling plate of a battery cell and a power module is not taken into consideration in the existing process of calculating the liquid cooling heat radiation rate, and the required liquid cooling heat radiation amount is larger. Therefore, the present disclosure provides a heat dissipation system and a heat dissipation capacity calculation method for a high-pressure energy storage container. Disclosure of Invention The invention provides a heat dissipation system of a high-pressure energy storage container and a heat dissipation capacity calculation method for overcoming the defects of the technical problems. The invention relates to a high-pressure energy storage container heat dissipation system, which comprises a container, a liquid cooling device and an air cooling device, wherein a battery core and a power module are arranged in the container, the battery core is used for storing electric energy, the power module is used for controlling the discharging process of the battery core, the liquid cooling device is used for dissipating heat of the battery core and the power module, the air cooling device is used for dissipating heat of an internal cavity of the container, and the air cooling device is composed of a refrigerating air conditioner fixed on the container; The main water inlet pipeline is uniformly provided with a plurality of vertical secondary water inlet pipelines communicated with the main water inlet pipeline, the secondary water inlet pipeline is uniformly provided with a plurality of horizontal small branch water inlet pipelines communicated with the secondary water inlet pipeline, the main water outlet pipeline is uniformly provided with a plurality of vertical secondary water outlet pipelines communicated with the main water outlet pipeline, the secondary water outlet pipeline is uniformly provided with a plurality of small branch water outlet pipelines communicated with the secondary water outlet pipeline, the small branch water inlet pipeline is communicated with a water inlet of the electric core liquid cooling plate or the module liquid cooling plate, and the small branch water inlet pipeline is communicated with a water outlet of the electric core liquid cooling plate or the module liquid cooling plate. According to the high-pressure energy storage container heat dissipation system, the number of the secondary water inlet pipelines and the secondary water outlet pipelines is 8, and the number of the small water inlet pipelines on each secondary water inlet pipeline and the number of the small water outlet