Energy storage cabinet temperature control system

Abstract

The utility model relates to the technical field of energy storage cabinets, and discloses an energy storage cabinet temperature control system which comprises a cabinet body, a support arranged in the cabinet body, a front-back through containing cavity arranged on the support, a plurality of battery packs placed in the containing cavity and an industrial air conditioner installed outside the cabinet body and providing cold air for the interior of the cabinet body. An air outlet of the industrial air conditioner is located right behind the support, a ventilation cavity is formed in the rear end of the support, an air inlet is formed in the rear end of the battery pack, and a fan used for exhausting air outwards is arranged at the front end of the battery pack. Straight air ducts from back to front along the tops and the bottoms of the battery packs and S-shaped air ducts sequentially bypassing the side surfaces of the battery packs are arranged in the battery pack. The utility model aims to provide an energy storage cabinet temperature control system which can improve the heat dissipation efficiency of a battery pack by increasing the contact area between a battery pack in the battery pack and cold air.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage cabinets, and particularly relates to a temperature control system for an energy storage cabinet. Background Art

[0002] An energy storage cabinet is a device for storing and releasing electric energy and is widely used in power grid construction due to its function of peak shaving and valley filling. Since a large amount of heat is generated during the charging and discharging processes of the energy storage cabinet, a temperature control system needs to be provided to control the battery packs inside it at an appropriate temperature. Air cooling is a commonly used temperature control measure. Usually, air ducts are arranged inside the battery packs, and cold air is introduced into the air ducts to cool the battery packs. The existing air ducts are usually arranged on the upper and lower sides or the left and right sides of the battery packs. The contact time between the introduced cold air and the battery packs is short and the contact surface is limited, so the heat dissipation efficiency is low. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the above problems and provide a temperature control system for an energy storage cabinet, which can improve the heat dissipation efficiency of the battery pack by increasing the contact area between the battery packs inside the battery pack and the cold air.

[0004] To solve the above technical problems, the technical solution provided by the utility model is: a temperature control system for an energy storage cabinet, including a cabinet body, a bracket arranged inside the cabinet body, a receiving cavity arranged on the bracket and penetrating through the front and back, a plurality of battery packs placed in the receiving cavity, and an industrial air conditioner installed outside the cabinet body and providing cold air to the inside of the cabinet body. The air outlet of the industrial air conditioner is located directly behind the bracket. A ventilation cavity is opened at the rear end of the bracket. An air inlet is opened at the rear end of the battery pack, and a fan for exhausting air outward is arranged at the front end. Straight air ducts are arranged inside the battery pack along the top and bottom of the battery packs from the rear to the front, and S-shaped air ducts are arranged to bypass the sides of each battery pack in sequence.

[0005] For the above temperature control system of the energy storage cabinet, the battery packs are cooled jointly by the straight air ducts at the top and bottom of the battery packs and the S-shaped air ducts at the sides of the battery packs, which increases the contact area between the battery packs and the cold air. At the same time, the S-shaped air ducts lengthen the length of the air ducts, thereby increasing the contact time between the cold air entering the battery pack and the battery packs during the flowing process, and thus improving the heat dissipation efficiency.

[0006] Further, the battery pack includes a housing, a lower positioning frame and an upper positioning frame installed inside the housing, a plurality of battery packs installed between the lower positioning frame and the upper positioning frame, and an upper cover installed on the top of the housing. A plurality of placement grooves are formed in the lower positioning frame along its length direction, and the battery packs are installed in the placement grooves. The placement grooves are arranged at intervals alternately left and right, so that an S-shaped air duct is formed between the side walls of the battery packs. On the side of the upper positioning frame and the lower positioning frame that contacts the surface of the battery pack, support bars are arranged at intervals, and the gaps between the support bars form a straight air duct. Its function is: by the support bars arranged at intervals, the interval part becomes an air duct, increasing the contact area between the battery pack and the cold air and improving the heat dissipation efficiency.

[0007] Further, a junction box is provided at the front end of the housing, and the fan is installed in the junction box and its two ends are respectively communicated with the inner cavity of the housing and the inner cavity of the cabinet. Its function is: to centrally arrange the battery management system (BMS), etc. in the junction box, making the overall structure of the battery pack more concise.

[0008] Further, the upper positioning frame and the lower positioning frame are of an axisymmetric structure. Its function is: to increase the positioning strength of the battery pack through the upper and lower symmetric upper positioning frame and lower positioning frame.

[0009] Further, the lower positioning frame includes a left baffle and a right baffle arranged symmetrically left and right. The support bars are evenly distributed between the left baffle and the right baffle. On the support bars, a left placement groove is formed with the left baffle as the left side surface, and a right placement groove is formed with the right baffle as the right side surface. The left placement groove and the right placement groove are arranged alternately along the length direction of the lower positioning frame. Grooves are formed at both the front and rear ends of the lower positioning frame. Its function is: by fixing the battery pack closely against the left baffle and the right baffle, the gap between the left and right side walls of the battery pack and the inner wall of the housing can be reduced, thereby blocking the cooling air and changing its flow direction, so that most of the cold air on the side of the battery pack enters the S-shaped air duct.

[0010] Further, chamfers are provided above the front and rear sides of the left placement groove and the right placement groove. Its function is: to facilitate the placement of the battery pack and avoid bumping and damaging the battery pack.

[0011] Further, the cross-section of the support bar is serrated or wavy, and the solid thickness of the top of the serration or the peak of the wave is greater than the depth of the left placement groove and the right placement groove. Its function is: to further increase the contact area between the battery pack and the cold air while ensuring the support area between the support bar and the battery pack.

[0012] Further, a fire-fighting connector for connecting a fire-fighting module is provided at the rear end of the housing, and the inlet of the fire-fighting connector is directly opposite to the gap between the battery pack and the left baffle or the right baffle. Its function is: to shorten the length of the S-shaped air duct, so that when the battery has a thermal runaway, the fire extinguishing agent can more quickly fill the S-shaped air duct and improve the fire extinguishing efficiency.

[0013] Furthermore, a rear baffle for limiting the battery pack is provided inside the bracket. Its function is to facilitate the limitation of the battery pack.

[0014] Combined with the above technical solutions, compared with the prior art, the present utility model has the following beneficial effects:

[0015] For the temperature control system of the energy storage cabinet provided by the present utility model, the direct air ducts arranged at the top and bottom of the battery pack and the S-shaped air duct formed along the side of the battery pack greatly increase the contact area between the battery pack and the cold air. During the heat dissipation process, most of the surface of the battery pack is in direct contact with the cold air, thereby improving the heat dissipation efficiency. The air outlet of the industrial air conditioner faces the ventilation cavity of the bracket, enabling the cold air released by the industrial air conditioner to quickly fill the ventilation cavity and be diverted to each battery pack through the ventilation cavity, further improving the cooling efficiency. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of a temperature control system of an energy storage cabinet according to the present utility model.

[0017] Figure 2 is a schematic structural diagram of a temperature control system of an energy storage cabinet from another perspective according to the present utility model.

[0018] Figure 3 is an exploded view of the battery pack according to the present utility model.

[0019] Figure 4 is a schematic diagram of the cold air flow direction between the battery packs according to the present utility model.

[0020] Figure 5 is a sectional view of the battery pack according to the present utility model.

[0021] Figure 6 is a schematic structural diagram of the lower positioning frame according to the present utility model.

[0022] Figure 7 is a schematic diagram of the position of the ventilation cavity and the rear baffle according to the present utility model.

[0023] Wherein: 1 - cabinet body, 2 - bracket, 21 - ventilation cavity, 22 - rear baffle, 23 - accommodation cavity, 3 - battery pack, 31 - outer shell, 311 - junction box, 312 - air inlet, 313 - fire protection joint, 32 - lower positioning frame, 321 - right baffle, 322 - support bar, 323 - right placement groove, 324 - left baffle, 325 - left placement groove, 326 - chamfer, 327 - groove, 33 - battery pack group, 34 - fan, 35 - upper positioning frame, 36 - upper cover, 4 - fire protection module, 5 - industrial air conditioner. Detailed Embodiments

[0024] To describe the technical features, achieved purposes and effects of the present utility model in detail, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0025] Please refer to the attached Figures 1-7 , a temperature control system for an energy storage cabinet, comprising a cabinet body 1, a bracket 2 arranged inside the cabinet body 1, a receiving cavity 23 that penetrates through the front and rear and is arranged on the bracket 2, a plurality of battery packs 3 placed in the receiving cavity 23, and an industrial air conditioner 5 installed outside the cabinet body 1 and providing cold air to the inside of the cabinet body 1. The air outlet of the industrial air conditioner 5 is located directly behind the bracket 2. A ventilation cavity 21 is opened at the rear end of the bracket 2. An air inlet 312 is opened at the rear end of the battery pack 3, and a fan 34 for exhausting air outward is provided at the front end. Inside the battery pack 3, there are straight air ducts along the top and bottom of the battery group 33 from the rear to the front and S-shaped air ducts that sequentially bypass the sides of each battery group.

[0026] In the above embodiment, the industrial air conditioner 5 is used to control the temperature and humidity inside the cabinet body 1 so that the charging and discharging of the battery pack 3 can be carried out in the best temperature and humidity environment. Specifically, during the process of cooling the battery pack 3, the cold air released by the industrial air conditioner 5 into the inside of the cabinet body 1 is shunted through the ventilation cavity 21 to each battery pack 3 and enters the inside of the battery pack 3 from the air inlet 312. After passing through the straight air ducts between the top and bottom of the battery group 33 and the S-shaped air ducts formed between the sides of the battery group 33, it is discharged outward through the fan 34. During this process, heat exchange occurs with the battery group 33 to cool the battery group 33. The electric fan 34 can accelerate the circulation of the cold air inside the battery pack 3 and improve the heat exchange efficiency.

[0027] Preferably, the battery pack 3 includes a housing 31, a lower positioning frame 32 and an upper positioning frame 35 installed inside the housing 31, a plurality of battery groups 33 installed between the lower positioning frame 32 and the upper positioning frame 35, and an upper cover 36 installed on the top of the housing 31. A plurality of placement grooves are opened along the length direction of the lower positioning frame 32. The battery groups 33 are installed in the placement grooves. The placement grooves are alternately arranged at intervals left and right, so that an S-shaped air duct is formed between the side walls of the battery groups 33. Support strips 322 are arranged at intervals on one side of the upper positioning frame 35 and the lower positioning frame 32 that is in contact with the surface of the battery group 33. The gaps between the support strips 322 form straight air ducts.

[0028] In the above embodiment, the battery group 33 is positioned through the placement grooves opened on the lower positioning frame 32, and the straight air ducts formed by the gaps between the support strips 322 are used to cool the top and bottom of the battery group 33. During the processing, the preliminary strip material can be formed by extrusion molding first and then subsequent processing can be carried out, thereby reducing the processing cost of the lower positioning frame 32 and the upper positioning frame 35.

[0029] Preferably, a junction box 311 is provided at the front end of the outer shell 31, and the fan 34 is installed in the junction box 311 and its two ends are respectively communicated with the inner cavity of the outer shell 31 and the inner cavity of the cabinet body 1.

[0030] In the above embodiment, the junction box 311 is used to centrally place the battery management system (BMS) and the control board (not shown in the figure), etc., making the internal structure of the battery pack 3 more concise. The temperature sensor on the battery pack 33 is connected through the control board to monitor the temperature of the battery pack 33 and feedback it to the energy storage cabinet control system.

[0031] Preferably, the upper positioning frame 35 and the lower positioning frame 32 are in an axisymmetric structure.

[0032] In the above embodiment, the axisymmetric upper positioning frame 35 and lower positioning frame 32 enable both the upper and lower ends of the battery pack 33 to be positioned by the positioning grooves, thus making the installation of the battery pack 33 more stable.

[0033] Preferably, the lower positioning frame 32 includes a left baffle 324 and a right baffle 321 that are symmetrically arranged left and right. The support bars 322 are evenly distributed between the left baffle 324 and the right baffle 321. A left placement groove 325 is formed on the support bar 322 with the left baffle 324 as the left side, and a right placement groove 323 is formed with the right baffle 321 as the right side. The left placement groove 325 and the right placement groove 323 are alternately arranged along the length direction of the lower positioning frame 32. Grooves 327 are formed at both the front and rear ends of the lower positioning frame 32.

[0034] In the above embodiment, the battery pack 33 is arranged close to the left baffle 324 or the right baffle 321. After installation, the width of the S-shaped air duct is much larger than the thickness of the left baffle 324 or the right baffle 321, so as to more conveniently change the flow direction of the cold air. In order to enable the side of the battery pack 33 close to the left baffle 324 or the right baffle 321 to also contact the cold air, the height of the left baffle 324 or the right baffle 321 should be less than one-fourth of the height of the outer shell, so as to form a narrow gap with the same width as the thickness of the left baffle 324 or the right baffle 321 between the upper positioning frame 35 and the lower positioning frame 32 for the cold air to pass through.

[0035] Preferably, chamfers 326 are provided above the front and rear sides of the left placement groove 325 and the right placement groove 323.

[0036] In the above embodiment, the chamfers 326 are used to guide the placement of the battery pack 33, reduce the placement difficulty, and at the same time avoid the sharp corners from bumping against the battery pack 33 and damaging the battery pack 33.

[0037] Preferably, the cross-section of the support bar 322 is serrated or wavy, and the solid thickness at the top of the serrations or the peak of the waves is greater than the depth of the left placement groove 325 and the right placement groove 323.

[0038] In the above embodiments, setting the support bar 322 in a serrated or wavy shape can reduce the thickness of the upper positioning frame 35 and the lower positioning frame, thereby reducing their weight. And setting the top of the serrated support bar 322 or the peak part of the wavy support bar 322 to be greater than the depth of the left placement groove 325 and the right placement groove 323 can ensure the processing space, so that the corresponding parts at the top of the support bar 322 are still solid planes after the left placement groove 325 and the right placement groove 323 are processed, ensuring the supporting area of the support bar 322 for the battery pack 33.

[0039] Preferably, a fire-fighting connector 313 for connecting the fire-fighting module 4 is provided at the rear end of the housing 31, and the inlet of the fire-fighting connector 313 faces the gap between the battery pack and the left baffle 324 or the right baffle 321.

[0040] In the above embodiments, a fire-fighting passage is formed through the fire-fighting connector 313 and the internal air duct of the battery pack 3. When the temperature is abnormal, the energy storage cabinet control system sends an instruction to the fire-fighting module 4 to inject fire extinguishing agent into the abnormal battery pack 3. The inlet of the fire-fighting connector 313 faces the gap between the battery pack and the left baffle 324 or the right baffle 321, so that the fire-fighting passage avoids the inlet section of the S-shaped air duct, shortening the length of the fire-fighting passage, and enabling the fire extinguishing agent to fill the S-shaped air duct more quickly when the battery has a thermal runaway, improving the fire extinguishing efficiency.

[0041] Preferably, a rear baffle 22 for limiting the battery pack 3 is provided inside the bracket 2.

[0042] In the above embodiments, the rear baffle 22 is used to limit the rear end of the battery pack 3, facilitating the placement of the battery pack 3. At the same time, each battery pack 3 can be placed relatively neatly, enabling the cold air to be shunted relatively evenly into each battery pack 3 internally.

[0043] It should be noted that the various embodiments in the content of the present invention are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the various embodiments can be referred to each other.

[0044] The present invention and its implementation manners have been described in detail above. Such a description is not restrictive. What is shown in the drawings is only some implementation manners of the present invention, and the actual structure is not limited thereto. Inspired by this, those of ordinary skill in the art can make various deformations, improvements and substitutions without departing from the concept of the present invention, and these should all fall within the protection scope of the present invention.

Claims

1. A temperature control system for an energy storage cabinet, characterized in that: The industrial air conditioner comprises a cabinet, a bracket arranged in the cabinet, a accommodating cavity arranged on the bracket and extending from front to back, a plurality of battery packs placed in the accommodating cavity, and an industrial air conditioner installed outside the cabinet and providing cold air to the inside of the cabinet, wherein the air outlet of the industrial air conditioner is located directly behind the bracket, a ventilation cavity is provided at the rear end of the bracket, an air inlet is provided at the rear end of the battery pack, and a fan for exhausting air to the outside is provided at the front end, and a straight air duct from back to front along the top and bottom of the battery pack and an S-shaped air duct bypassing the sides of each battery pack in sequence are provided inside the battery pack.

2. The energy storage cabinet temperature control system according to claim 1, characterized in that: The battery pack includes an outer shell, a lower positioning frame and an upper positioning frame installed inside the outer shell, a plurality of battery packs installed between the lower positioning frame and the upper positioning frame, and an upper cover installed on the top of the outer shell. The lower positioning frame is provided with a plurality of placement grooves along its length direction. The battery packs are installed in the placement grooves. The placement grooves are alternately spaced on the left and right sides to form an S-shaped air duct between the side walls of the battery packs. The upper and lower positioning frames are spaced apart with support bars on one side in contact with the surface of the battery pack, and the gaps between the support bars constitute a straight air duct.

3. The energy storage cabinet temperature control system according to claim 2, characterized in that: A junction box is provided at the front end of the shell, and the fan is installed in the junction box and its two ends are respectively connected with the inner cavity of the shell and the inner cavity of the cabinet.

4. The energy storage cabinet temperature control system according to claim 2, characterized in that: The upper positioning frame and the lower positioning frame are in an axisymmetric structure.

5. The energy storage cabinet temperature control system according to claim 2, characterized in that: The lower positioning frame includes a left baffle plate and a right baffle plate which are symmetrically arranged on the left and right sides, and the support bars are evenly distributed between the left baffle plate and the right baffle plate. A left placement groove is provided on the support bar with the left baffle plate as the left side surface, and a right placement groove is provided on the right baffle plate as the right side surface. The left placement groove and the right placement groove are alternately arranged along the length direction of the lower positioning frame, and grooves are provided at both the front and rear ends of the lower positioning frame.

6. The energy storage cabinet temperature control system according to claim 5, characterized in that: Chamfers are provided on the upper parts of the front and rear sides of the left placement groove and the right placement groove.

7. The energy storage cabinet temperature control system according to claim 5, characterized in that: The cross section of the support bar is sawtooth or wave-shaped, and the solid thickness of the sawtooth top or wave crest portion is greater than the depth of the left placement groove and the right placement groove.

8. The energy storage cabinet temperature control system according to claim 5, characterized in that: A fire-fighting joint for connecting a fire-fighting module is provided at the rear end of the shell, and an inlet of the fire-fighting joint faces the gap between the battery pack and the left baffle or the right baffle.

9. The energy storage cabinet temperature control system according to claim 1, characterized in that: A rear baffle for limiting the position of the battery pack is provided on the inner side of the bracket.

Images