Energy storage container and energy storage system

Abstract

The utility model discloses an energy storage container and an energy storage system. The energy storage container comprises a container body, the inner walls of two first side walls of the container body are each provided with a plurality of sliding rails, the sliding rails of each first side wall are arranged at intervals in the height direction, and the area between the two sliding rails with the same height on the two first side walls forms a layer of battery pack installation area; one of the two second side walls on the box body is of a hinged door structure, the outer surface of one door leaf of the hinged door structure is used for fixing a fire fighting device, and the outer surface of the other door leaf of the hinged door structure is used for fixing a temperature control device. The interior of the container body of the energy storage container is only used as a mounting area for the plurality of battery packs, and the temperature control device and the fire fighting device are mounted on the outer wall of the container body, so that an energy storage system adopting the energy storage container has higher energy density.

Description

Technical Field

[0001] The utility model belongs to the field of batteries, and particularly relates to an energy storage container and an energy storage system. Background Art

[0002] The existing lithium battery technology is mainly applied to electric vehicles as the power source of electric vehicles, and is also applied to power plants as an energy storage system for storing and releasing electric energy.

[0003] The energy storage system can be used in the power grid for peak shaving and valley filling to meet the power supply demands during peak and valley periods in different time periods and regions of the urban distribution network.

[0004] In addition to multiple battery packs as the core of charge and discharge, controlling the temperature of each battery in the battery pack through a temperature control device, and in some extreme cases, when a certain battery has a thermal runaway, it is necessary to use a fire protection device to timely and effectively handle the thermal runaway, etc. are all relatively important links in the energy storage system.

[0005] In the existing energy storage system, important components such as battery packs, temperature control devices, and fire protection devices are all installed inside the box body of the energy storage container. Therefore, it is necessary to reserve space inside the box body so that operators can enter the box body to install and repair the battery packs, temperature control devices, and fire protection devices; in this way, it will affect the energy density of the energy storage system. Summary of the Utility Model

[0006] In order to improve the energy density of the energy storage system, the first aspect of the utility model provides an energy storage container.

[0007] The energy storage container includes a box body, and a plurality of slide rails are respectively arranged on the inner walls of two first side walls of the box body. The plurality of slide rails on each first side wall are arranged at intervals in the height direction, and the area between two slide rails at the same height on the two first side walls constitutes a battery pack installation area;

[0008] One of the two second side walls of the box body is a double-door structure. A fire protection device is fixed on the outer surface of one door leaf of the double-door structure, and a temperature control device is fixed on the outer surface of the other door leaf of the double-door structure.

[0009] In the utility model, the inside of the box body of the energy storage container is only used as the installation area for multiple battery packs, and the temperature control device and the fire protection device are installed on the outer wall of the box body. Compared with the existing energy storage system in which the battery pack, temperature control device, and fire protection device are all installed inside the box body, when the volume inside the energy storage container is the same, the energy storage system using the energy storage container of the utility model has a greater energy density;

[0010] Meanwhile, the temperature control device and the fire protection device are installed on the outer wall of the box. Operators do not need to enter the box to install and maintain the temperature control device and the fire protection device, ensuring the personal safety of the operators.

[0011] Furthermore, the first side wall includes a plurality of vertical support columns and wall panels; the plurality of vertical support columns are arranged at intervals, and wall panels are fixedly arranged between every two vertical support columns; the slide rail is perpendicularly and fixedly connected to at least two vertical support columns. The utility model directly uses the side wall of the box as the bracket for the battery pack, without the need to additionally arrange a battery pack bracket inside the box, thereby further improving the energy density of the energy storage system.

[0012] Furthermore, the above-mentioned slide rail is an angle steel perpendicularly welded to at least two vertical support columns. Using angle steel as the slide rail and fixing it to the vertical support column by welding not only improves the strength of the energy storage container box, but also makes the structure of the slide rail simpler and the manufacturing cost lower.

[0013] Furthermore, in order to make the energy storage system meet safety requirements, an exhaust fan and a vent are installed on at least one of the above-mentioned wall panels.

[0014] The second aspect of the present utility model provides an energy storage system, including a battery pack, a fire protection device, a temperature control device, and the energy storage container described in the first aspect;

[0015] At least one battery pack is installed in each layer of the battery pack installation area in the energy storage container;

[0016] The fire protection device is installed on the outer surface of one door leaf of the double-leaf door structure in the energy storage container;

[0017] The temperature control device is installed on the outer surface of the other door leaf of the double-leaf door structure in the energy storage container.

[0018] Furthermore, the above-mentioned battery pack includes an installation platform and a plurality of high-capacity batteries installed on the installation platform.

[0019] Furthermore, in order to facilitate the wiring and maintenance of the BMS, the above-mentioned energy storage system further includes a BMS component; the BMS component includes a fixing plate and a plurality of BMSs arranged on the fixing plate; the fixing plate is fixedly arranged on one side of the battery pack close to the double-leaf door structure. During operation, only need to open the double-leaf door structure to realize the installation and maintenance of the BMS.

[0020] Furthermore, the above-mentioned fire protection device includes a first fixed cabinet and a thermal runaway smoke treatment unit;

[0021] The first fixed cabinet is fixedly installed on the door leaf of the double-leaf door structure;

[0022] The thermal runaway flue gas treatment unit includes an adsorption component and an ignition component; the adsorption component is arranged inside the first fixed cabinet, the ignition component is arranged on the top of the first fixed cabinet, the inlet of the adsorption component is connected to the flue gas confluence pipe, and the outlet of the adsorption component is connected to the ignition component.

[0023] Furthermore, the above energy storage system further includes a UPS and a fire extinguishing medium storage tank arranged inside the first fixed cabinet.

[0024] Furthermore, the above temperature control device includes a second fixed cabinet and a chiller;

[0025] The second fixed cabinet is fixedly installed on the other door leaf of the double-leaf door structure, and the chiller is installed inside the second fixed cabinet.

[0026] Compared with the prior art, the present utility model has at least the following beneficial effects:

[0027] In the present utility model, the interior of the energy storage container is only used as the installation area for multiple battery packs, and the temperature control device and the fire protection device are installed on the outer wall of the container. Compared with the prior art energy storage system in which the battery packs, the temperature control device, and the fire protection device are all installed inside the container, when the volume inside the energy storage container is the same, the energy storage system using the energy storage container of the present utility model has a greater energy density;

[0028] At the same time, since the temperature control device and the fire protection device are installed on the outer wall of the container, the operator does not need to enter the container to install and repair the temperature control device and the fire protection device, ensuring the personal safety of the operator. Description of the Drawings

[0029] Figure 1 It is a schematic structural diagram of the energy storage container in Embodiment 1;

[0030] Figure 2 It is a cross-sectional view of the energy storage container in Embodiment 1;

[0031] Figure 3 It is a schematic structural diagram of the energy storage system in Embodiment 2 Figure 1 ;

[0032] Figure 4 It is a schematic structural diagram of the energy storage system in Embodiment 2 Figure 2 ;

[0033] Figure 5 It is a schematic structural diagram of a large-capacity battery;

[0034] Figure 6 It is a cross-sectional view of a large-capacity battery;

[0035] Figure 7 It is a schematic structural diagram of the BMS component;

[0036] Figure 8Schematic structure of the energy storage system in Embodiment 2 Figure 3 。

[0037] The reference signs are as follows:

[0038] 100 - energy storage container; 1 - box body, 11 - top cover, 12 - base, 13 - first side wall, 131 - slide rail, 132 - vertical support column, 133 - wall panel, 134 - exhaust fan, 135 - pressure relief port, 14 - second side wall, 15 - double-leaf door structure, 2 - battery pack, 21 - installation platform, 211 - first cross beam, 212 - second cross beam, 22 - high-capacity battery, 221 - outer shell, 222 - single cell, 223 - shared chamber, 224 - high-capacity battery polarity terminal, 3 - fire protection device, 31 - first fixed cabinet, 32 - thermal runaway flue gas treatment unit, 321 - adsorption component, 322 - ignition component, 33 - UPS, 34 - fire protection medium tank, 4 - temperature control device, 41 - second fixed cabinet, 42 - chiller, 5 - BMS component, 51 - fixing plate, 52 - BMS. Detailed implementation manners

[0039] The technical solutions will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments. Based on the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0040] Meanwhile, it should be noted that the orientation or positional relationship indicated by terms such as "front, rear, left, right, up and down" in the text is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the technical solutions. In addition, the terms "first, second or third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] Unless otherwise clearly defined and limited in the present utility model, the terms "installation, connection and coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection: it may also be a mechanical connection, an electrical connection or a direct connection, or may be indirectly connected through an intermediate medium, or may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] Embodiment 1

[0043] This embodiment provides an energy storage container, as Figure 1 and Figure 2As shown, the energy storage container 100 includes a box body 1. The box body is in an overall cuboid structure and includes a top cover 11, a base 12, two first side walls 13, and two second side walls 14. The side walls parallel to the xz plane are defined as the first side walls 13, and the side walls parallel to the yz plane are defined as the second side walls 14.

[0044] A battery pack installation cabin is formed between the top cover 11, the base 12, the two first side walls 13, and the two second side walls 14. A plurality of slide rails 131 are respectively arranged on the inner walls of the two first side walls 13. The plurality of slide rails 131 on each first side wall 13 are spaced along the height direction (i.e., the z direction as described Figure 1 above). The area between two slide rails 131 at the same height on the two first side walls constitutes one layer of battery pack installation area, and the battery pack is installed in place in the battery pack installation area by sliding. As Figure 2 shown, there are 8 layers of battery pack installation areas in the battery pack installation cabin from top to bottom, Figure 2 and the position of the dashed box in the figure is the battery pack installation area.

[0045] One of the two second side walls 14 on the box body 1 is a double - door structure 15. A fire - fighting device is fixed on the outer surface of one door leaf of the double - door structure 15, and a temperature - control device is fixed on the outer surface of the other door leaf of the double - door structure 15.

[0046] Preferably, in this embodiment, the first side wall 13 includes a plurality of vertical support columns 132 and wall panels 133. The plurality of vertical support columns 132 are arranged at intervals between the top cover 11 and the base 12, and a wall panel 133 is fixedly arranged between every two vertical support columns 132. The slide rail 131 is perpendicularly and fixedly connected to at least two vertical support columns 132. The utility model directly uses the side wall of the box body 1 as the bracket for the battery pack, without additionally arranging a battery pack bracket inside the box, thereby further improving the energy density of the energy storage system.

[0047] In this embodiment, the slide rail 131 is made of angle steel and is fixed to the vertical support column 132 by vertical welding, which can not only increase the strength of the first side wall, but also the cost of making the angle steel as the slide rail is relatively low. In some other embodiments, other profiles such as rectangular tubes can also be used as the slide rail.

[0048] In this embodiment, in order to make the energy storage system meet safety requirements, an exhaust fan 134 and a pressure relief port 135 are arranged on at least one wall panel 133. Among them, the function of the exhaust fan 134 is to timely discharge the heat inside the container, ensure that the battery and other components operate within a suitable temperature range, and avoid performance degradation or safety risks that may be caused by overheating. The main function of the pressure relief port 135 is to automatically open and release pressure when the internal pressure of the box body is too high, avoiding safety accidents caused by excessive internal pressure.

[0049] Embodiment 2

[0050] As Figure 3 and Figure 4 shown, this embodiment provides an energy storage system, including a battery pack 2, a fire protection device 3, a temperature control device 4, and the energy storage container 100 described in Embodiment 1;

[0051] The interior of the box body 1 of the energy storage container 100 is only used as a battery pack installation compartment. The battery pack installation compartment has 8 layers of battery pack installation areas from top to bottom, and at least one battery pack 2 is installed in each layer of the battery pack installation area; the fire protection device 3 is installed on the outer surface of one door leaf of the double-leaf door structure 15 in the energy storage container; the temperature control device 4 is installed on the outer surface of the other door leaf of the double-leaf door structure 15 in the energy storage container.

[0052] The form of the battery pack can be one of the following:

[0053] Form 1: The battery pack 2 includes an installation platform, an outer box shell, and multiple single cells; the multiple single cells are electrically connected in series or in parallel and are installed as a whole inside the outer box shell; the outer box shell is fixed on the installation platform; wherein, in order to facilitate the installation of the battery pack in place in the battery pack installation area, pulleys are provided on the installation platform;

[0054] Form 2: The battery pack 2 includes an installation platform 21 and multiple high-capacity batteries 22; the multiple high-capacity batteries 22 are fixed side by side on the installation platform 21 and are electrically connected in series. Wherein, in order to facilitate the installation of the battery pack in place in the battery pack installation area, pulleys are provided on the installation platform;

[0055] Specifically, as Figure 5 and Figure 6 shown, the high-capacity battery 22 includes a shell 221 and multiple single cells 222; the multiple single cells 222 are arranged in the same direction and placed in the inner cavity of the shell 221.

[0056] The present utility model does not make specific limitations on the shell structure, and at least the following two structures can be adopted:

[0057] The first structure: includes a cylinder with open ends at both ends (i.e., the port parallel to the yz plane is an open end) and end plates respectively fixed at the two open ends of the cylinder (i.e., the end plates are parallel to the yz plane);

[0058] The second structure: includes a cylinder with open ends at the top and bottom (i.e., the port parallel to the xy plane is an open end) and an upper cover plate and a lower cover plate respectively fixed at the open ends at the top and bottom of the cylinder (i.e., both the upper cover plate and the lower cover plate are parallel to the xy plane, and the lower cover plate can be an integral structure with the cylinder);

[0059] A shared chamber 223 can also be provided inside the above-mentioned shell 221.

[0060] It should be noted that:

[0061] The above-mentioned shared chamber 223 can be an electrolyte shared chamber. The inner cavity of the electrolyte shared chamber is connected to the inner cavities of each single battery. Through the electrolyte shared chamber, each single battery can be in a unified electrolyte environment, ensuring the uniformity of the electrolyte in each single battery; improving the performance and charge-discharge cycle life of large-capacity batteries. Here, the electrolyte shared chamber is a liquid channel extending along the length direction of the housing between the housing bottom plate and each single battery. This liquid channel can be integrally formed with the housing bottom plate or can be formed by setting support members between the lower cover plate of the single battery and the housing bottom plate.

[0062] The above-mentioned shared chamber 223 can also be a gas shared chamber provided on the top plate of the housing. The gas shared chamber covers the gas ports at the tops of each single battery in the large-capacity battery. It should be noted that the gas port here has the following two meanings:

[0063] 1) The gas port is a first through hole directly opened on the upper cover plate of the single battery and penetrating the inner cavity of the single battery;

[0064] At this time, the inner cavity of the gas shared chamber is connected to the gas areas in the inner cavities of each single battery through this gas port. Based on the gas shared chamber, the gas areas of each single battery can be connected to achieve gas balance, enabling each single battery to share gas to ensure the consistency of each single battery, and improving the cycle life of the large-capacity battery to a certain extent; when any single battery has a thermal runaway, the flue gas in the inner cavity of this single battery enters the gas shared chamber and is discharged through the gas shared chamber, improving the safety of this large-capacity battery.

[0065] 2) The gas port is a pressure relief port or explosion-proof port provided on the upper cover plate of the single battery, and a pressure relief membrane is provided at this pressure relief port or explosion-proof port;

[0066] At this time, the gas shared chamber is used as a pressure relief channel. When the pressure relief membrane at the gas port of any single battery is broken by the flue gas in the inner cavity, the inner cavity of this single battery is connected to the gas shared chamber, and the internal flue gas is discharged through the gas shared chamber, improving the safety of this large-capacity battery.

[0067] The above-mentioned shared chamber 223 can also be a gas-liquid shared chamber. Through one gas-liquid shared chamber, each single battery can be in a unified electrolyte environment and gas environment, improving the performance and charge-discharge cycle life of the large-capacity battery.

[0068] For the convenience of electrical connection of such large-capacity batteries 22, first avoidance holes are opened on the top plate of the outer shell 221 (in the outer shell of the first structure, the top plate of the outer shell 221 here is the cylinder top plate; in the outer shell of the second structure, the top plate of the outer shell here is the upper cover plate) corresponding to the polarity terminals of each single battery; the polarity terminals of each single battery extend out of the corresponding first avoidance holes to serve as the polarity terminals 224 of the large-capacity battery, and the area of the outer shell top plate corresponding to the first avoidance hole is fixedly sealed with the single battery housing, so that the first avoidance hole part of the outer shell top plate is sealed.

[0069] It should be noted that the polarity terminal of the single battery described here can be the pole column of the single battery. If it is necessary to avoid that the pole column of the single battery cannot smoothly extend out of the first avoidance hole or the height of extending out of the first avoidance hole does not meet the set requirements, a pole column adapter can also be connected to the pole column of the single battery, and the overall structure of the cooperation of the pole column of the single battery and the pole column adapter is used as the polarity terminal of the single battery.

[0070] In order to improve the heat exchange efficiency of the above-mentioned large-capacity battery, the present utility model adopts a utility model concept similar to that of Chinese Patent CN118299714A, that is, mainly conducts heat exchange on the polarity terminals of single batteries where the heat is relatively concentrated. However, different from Chinese Patent CN118299714A, the present utility model considers that by optimizing the heat exchange structure and adopting a direct heat exchange method, the polarity terminals are in direct contact with the heat exchange medium to achieve heat exchange of the polarity terminals; compared with the effect of the heat exchange medium indirectly exchanging heat with the polarity terminals through a heat exchanger, first, it has a shorter heat exchange path and can improve the utilization efficiency of the heat exchange medium; second, it has a larger heat exchange area, improves the heat exchange efficiency, and further can improve the heat exchange efficiency of such large-capacity batteries.

[0071] Specifically, as Figure 4 shown, the installation platform 21 is integrally in a rectangular frame, including two first cross beams 211 and two second cross beams 212; the first cross beam 211 extends along the x direction, and the second cross beam 212 extends along the y direction; pulleys are arranged on the first cross beam 211 to facilitate the easy installation of the battery pack in place;

[0072] As Figure 4 [[ID=1`6]]and Figure 7 shown, for the convenience of wiring and maintenance of the BMS, in this embodiment, the energy storage system further includes a BMS component 5; the BMS component 5 includes a fixing plate 51 and a plurality of BMSs 52 arranged on the fixing plate. The fixing plate 51 is vertically arranged and fixedly connected to the second cross beam of at least one battery pack; in this embodiment, the battery pack is in the second form, and the number of BMSs is the same as that of the large-capacity batteries, that is, one BMS manages one large-capacity battery;

[0073] In this embodiment, as Figure 8As shown in the figure, the fire protection device 3 specifically includes a first fixed cabinet 31 and a thermal runaway flue gas treatment unit 32. The first fixed cabinet 31 is fixedly installed on one door leaf of the double-leaf door structure. The thermal runaway flue gas treatment unit 32 includes at least an adsorption component 321 and an ignition component 322. The adsorption component 321 is arranged inside the first fixed cabinet 31, and the ignition component 322 is arranged on the top of the first fixed cabinet 31. The inlet of the adsorption component 321 is connected to the flue gas confluence pipe, and the outlet of the adsorption component 321 is connected to the ignition component. The adsorption component 321 includes at least one adsorption tank. When thermal runaway occurs, the thermal runaway flue gas is first adsorbed by the adsorption tank, and then the thermal runaway flue gas is ignited.

[0074] Preferably, a UPS 33 and a fire protection medium tank 34 are also arranged in the first fixed cabinet 31. For reasonable layout, in this embodiment, the first fixed cabinet 31 is divided into two upper and lower spaces. The thermal runaway flue gas treatment unit 32 and the fire protection medium tank 34 are installed in the upper space of the first fixed cabinet 31, and the UPS 33 is installed in the lower space of the first fixed cabinet 31.

[0075] In this embodiment, as Figure 8 shown, the temperature control device 4 specifically includes a second fixed cabinet 41 and a chiller 42. The second fixed cabinet 41 is fixedly installed on the other door leaf of the double-leaf door structure 15, and the chiller 42 is installed inside the second fixed cabinet 41.

[0076] Based on the description of the above energy storage system structure, the assembly process of the energy storage system is introduced as follows:

[0077] Step 1: Install the battery pack

[0078] First, open the double-leaf door structure 15. Then, install multiple high-capacity batteries 22 onto the installation platform 21 to complete the installation of the battery pack 2. Next, install at least one battery pack 2 in each battery pack installation area.

[0079] ] Step 2: Install the BMS

[0080] Fix the BMS component 5 to the second cross beam 212 of the battery pack close to the double-leaf door structure side.

[0081] Step 3: Install the fire protection device 3 and the temperature control device 4

[0082] First, close the double-leaf door structure 15. Then, fix the assembled fire protection device 3 and temperature control device 4 to the outer surfaces of the two door leaves of the double-leaf door structure 15.

Claims

1. A energy storage container, characterized in that, It includes a box body, on the inner walls of two first side walls of the box body, a plurality of slide rails are respectively arranged, the plurality of slide rails on each first side wall are arranged at intervals in the height direction, and the area between two slide rails at the same height on the two first side walls constitutes a battery pack installation area for one layer; One of the two second side walls of the box body is a double-leaf door structure, a fire-fighting device is fixed on the outer surface of one leaf of the double-leaf door structure, and a temperature control device is fixed on the outer surface of the other leaf of the double-leaf door structure.

2. The energy storage container according to claim 1, characterized in that, The first side wall includes a plurality of vertical support columns and wall panels; the plurality of vertical support columns are arranged at intervals, and a wall panel is fixedly arranged between every two vertical support columns.

3. The energy storage container according to claim 1 or 2, characterized in that, The slide rail is an angle steel vertically welded to at least two vertical support columns.

4. The energy storage container according to claim 3, wherein, At least one wall panel is provided with an exhaust fan and a vent.

5. A energy storage system, characterized in that, It includes a battery pack, a fire-fighting device, a temperature control device, and an energy storage container as described in any one of claims 1 to 4; At least one battery pack is installed in each battery pack installation area of each layer in the energy storage container; The fire-fighting device is installed on the outer surface of one leaf of the double-leaf door structure in the energy storage container; The temperature control device is installed on the outer surface of the other leaf of the double-leaf door structure in the energy storage container.

6. The energy storage system according to claim 5, characterized in that: The battery pack includes an installation platform and a plurality of high-capacity batteries installed on the installation platform.

7. The energy storage system according to claim 6, characterized in that: It further includes a BMS component; the BMS component includes a fixing plate and a plurality of BMSs arranged on the fixing plate; the fixing plate is fixedly arranged on one side of the battery pack close to the double-leaf door structure.

8. An energy storage system according to claim 7, wherein: The fire-fighting device includes a first fixed cabinet and a thermal runaway flue gas treatment unit; The first fixed cabinet is fixedly installed on the leaf of the double-leaf door structure; The thermal runaway flue gas treatment unit includes an adsorption component and an ignition component; the adsorption component is arranged inside the first fixed cabinet, the ignition component is arranged on the top of the first fixed cabinet, the inlet of the adsorption component is connected to the flue gas confluence pipe, and the outlet of the adsorption component is connected to the ignition component.

9. The energy storage system according to claim 8, wherein: It further includes a UPS and a fire-fighting medium storage tank arranged inside the first fixed cabinet.

10. A energy storage system according to claim 5, characterized in that: The temperature control device includes a second fixed cabinet and a chiller; the second fixed cabinet is fixedly installed on the other leaf of the double-leaf door structure, and the chiller is installed inside the second fixed cabinet.

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