Battery cabinet

Abstract

The utility model provides a battery cabinet. The battery cabinet comprises a battery rack and a plurality of large horizontal batteries, the interior of the battery cabinet is divided into three spaces by the battery rack. Wherein the space on one side is used for installing a battery cabinet management system, a combiner box, a safener storage tank and the like; the space on the other side is used for arranging a cylindrical waste discharge pipeline, the top and the bottom of the waste discharge pipeline are communicated with a gas opening in the top plate and a liquid opening in the bottom plate of the battery rack, and the side wall of the lower part of the waste discharge pipeline inclines towards the inside of the pipeline; a plurality of horizontal shelves are arranged in the middle space, and a large horizontal battery is placed on each shelf. A discharge port of each battery is connected with a waste discharge pipeline through a discharge branch pipe, an injection port of each battery is connected with a safener storage tank through an injection branch pipe, and the batteries are connected with a battery cabinet management system and a combiner box through lines. The battery cabinet is small in size, simple in structure and convenient to mount, has battery maintenance and safety functions, and can prolong the service life and improve the safety performance of the battery.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, in particular to a battery cabinet. Background Art

[0002] Energy storage is an important supporting technology for the large-scale development of new energy. New energy + energy storage will be an important technology and industry direction in the next decade. Lithium-ion batteries are new high-energy batteries that use lithium-embedded compounds as positive and negative electrode materials. Currently, electrochemical energy storage using lithium-ion batteries as carriers is one of the most widely used forms of energy storage. Lithium batteries for energy storage generally connect single cells in series into modules, and several modules are arranged in a cluster. They are connected in parallel in the form of battery cabinets or battery racks to form battery arrays. After convergence and power conversion, they are connected to the grid or directly output for application. However, the battery cabinet design and safety issues of large batteries are still urgently needed, requiring technological innovation and breakthroughs. Utility Model Content

[0003] In view of the above problems, the utility model provides a battery cabinet, which includes a battery rack and a plurality of large horizontal batteries. The battery rack divides the battery cabinet into three spaces. One side of the space is used to install the battery cabinet management system, the junction box and the safety agent storage tank, etc.; the other side of the space is used to set a cylindrical waste discharge pipe, the top and bottom of the waste discharge pipe are connected to the gas opening on the top plate of the battery rack and the liquid opening on the bottom plate, and the lower side wall of the waste discharge pipe is inclined toward the inside of the pipe; a plurality of horizontal shelves are arranged in the middle space, and a large horizontal battery is placed on each shelf. The discharge port of each battery is connected to the waste discharge pipe via a discharge branch pipe, and the injection port of the battery is connected to the safety agent storage tank via an injection branch pipe, and the battery is connected to the battery cabinet management system and the junction box via a line. The battery cabinet is small in size, simple in structure, easy to install, and has battery maintenance and safety functions, which can improve the service life and safety performance of the battery.

[0004] The technical solution provided by the utility model is as follows:

[0005] According to the utility model, a battery cabinet is provided, which includes a battery rack and a plurality of batteries. The battery rack includes a top plate, a bottom plate, four columns, two vertical plates and a plurality of horizontal shelves. The top plate and the bottom plate are connected by four columns to form a space, and the two vertical plates are parallel to each other and divide the space into a first space, a second space and a third space. The four columns can be integrally formed with the top plate and the bottom plate or can be fixedly connected to the four corners of the top plate and the bottom plate. A transverse or longitudinal rib can also be arranged between every two columns located on the side, which can be used to enhance the battery rack structure and can be used to install and position other components, pipelines or equipment. The battery rack is divided into three side-by-side spaces by two parallel vertical plates, a first space located on one side, a second space located in the middle and a third space located on the other side, and the two vertical plates can be flat plates or frame bars. A battery cabinet management system and a junction box can be installed in the first space. In the second space, a plurality of horizontal shelves are connected between the two vertical plates to place a plurality of batteries, and each battery is provided with an injection port for injecting fluid into the battery and a discharge port for discharging fluid from the battery. A waste discharge pipe is arranged in the third space, and the waste discharge pipe is a cylindrical shape extending in the height direction of the battery cabinet. A gas opening is arranged on the top plate of the battery rack and the upper end of the waste discharge pipe is connected to the gas opening, and a liquid opening is arranged on the bottom plate of the battery rack and the lower end of the waste discharge pipe is connected to the liquid opening. The gas opening can be connected to an external waste gas treatment and emptying system through a pipeline for exhaust, and the liquid opening can be connected to an external waste liquid treatment system through a pipeline for draining liquid. The lower part of the barrel wall of the waste discharge pipe is inclined toward the inside of the liquid discharge pipe to collect the liquid in the liquid discharge pipe, which is more conducive to the discharge of the liquid. A multi-in-one battery thermal runaway sensor integrating temperature, smoke, VOC, hydrogen, and carbon monoxide can also be installed on the waste discharge pipe. Placing the thermal runaway sensor inside the waste discharge pipe can eliminate interference from the external environment and prevent false alarms of signals such as smoke. At the same time, the limited detection space can also improve the detection accuracy of the thermal runaway sensor and improve the accuracy of accident warning. In addition, an explosion vent and / or explosion-proof fan can also be provided on the exhaust pipe. When the exhaust solenoid valve is opened due to a battery failure, the explosion vent and / or explosion-proof fan are opened at the same time to help the battery quickly discharge the gas generated after thermal runaway and prevent gas accumulation. A plurality of connection ports are provided on the exhaust pipe, and the exhaust port of each battery is connected to the connection port on the exhaust pipe via an exhaust branch pipe. The battery is connected to the battery cabinet management system and the junction box via a line. The length of the battery cabinet can be about 500 to 1800 mm, the width can be about 300 to 700 mm, and the height can be about 1000 to 2400 mm. The length of a large horizontal battery can be about 300 mm to 1500 mm, the width can be about 200 mm to 500 mm, and the height can be about 50 mm to 200 mm. 16 to 24 batteries can be placed in each battery cabinet. The material of the battery rack can be aluminum, stainless steel, etc. The outside of the battery rack can be installed with shells, doors and other components.

[0006] On the battery rack, a battery is placed on each horizontal shelf. In order to simultaneously meet the requirements of simple series connection of batteries and simple pipeline setting for battery injection and discharge fluid, and avoid complicated line connection and pipeline connection, preferably, the batteries are divided into two types, that is, odd-numbered layers of batteries are placed on odd-numbered layers from top to bottom, and even-numbered layers of batteries are placed on even-numbered layers from top to bottom. The first side of the odd-numbered layer battery is provided with a discharge port and a plurality of first poles, and the second side opposite to the first side is provided with an injection port and a plurality of second poles. The first side of the even-numbered layer battery is provided with an injection port and a plurality of first poles, and the second side opposite to the first side is provided with a discharge port and a plurality of second poles. In other words, the other parts of the odd-numbered layer battery and the even-numbered layer battery are the same, except that the injection port and the discharge port of the odd-numbered layer battery are arranged opposite to the injection port and the discharge port of the even-numbered layer. The discharge port on the first side of the odd-numbered layer battery corresponds to the position and port structure of the discharge port on the second side of the even-numbered layer battery, and the injection port on the second side of the odd-numbered layer battery corresponds to the position and arrangement of the injection port on the first side of the even-numbered layer battery. When the batteries are placed in the battery rack, the first side of the odd-numbered layer of batteries and the second side of the even-numbered layer of batteries are located on the same side of the battery cabinet, and the discharge ports of the even-numbered layer of batteries are aligned vertically with the discharge ports of the odd-numbered layer of batteries, which is conducive to simplifying the design and structure of the discharge branch pipe. Similarly, the second side of the odd-numbered layer of batteries and the first side of the even-numbered layer of batteries are located on the same side of the battery cabinet, and the injection ports of the even-numbered layer of batteries are aligned vertically with the injection ports of the odd-numbered layer of batteries, which is conducive to simplifying the design and structure of the injection branch pipe.

[0007] Except for the injection port and the discharge port, the positions and structures of the positive poles, negative poles, coolant injection and discharge ports, third electrodes, etc. of the odd-numbered layer batteries and the even-numbered layer batteries are the same. For example, the first side of the battery is provided with a plurality of first poles such as positive poles, and the second side of the battery is provided with a plurality of second poles such as negative poles. When the odd-numbered layer batteries and the even-numbered layer batteries are placed upside down, that is, the first side and the second side, the first poles (such as positive poles) of the odd-numbered layer batteries and the second poles (such as negative poles) of the even-numbered layer batteries are located on the same side of the battery cabinet, and the second poles (such as negative poles) of the odd-numbered layer batteries and the first poles (such as positive poles) of the even-numbered layer batteries are located on the same side of the battery cabinet, which is conducive to the simple series connection between the positive and negative poles of the upper and lower layer batteries. When there are an even number of layers of batteries, the multiple first poles on the first side of the odd numbered layer of batteries located at the top layer are electrically connected through the first busbar and the first busbar is connected to the combiner box, the multiple second poles on the second side of the even numbered layer of batteries located at the bottom layer are electrically connected through the second busbar and the second busbar is connected to the combiner box, the multiple second poles on the second side of the odd numbered layer of batteries are electrically connected to the multiple first poles on the first side of the even numbered layer of batteries through multiple connecting soft bars, and the multiple second poles on the second side of the even numbered layer of batteries are electrically connected to the multiple first poles on the first side of the odd numbered layer of batteries through multiple connecting soft bars, so that the multiple batteries are connected in series. Alternatively, when there are odd-numbered layers of batteries, the multiple first poles on the first side of the odd-numbered layer of batteries located at the top layer are electrically connected through the first busbar and the first busbar is connected to the combiner box, the multiple second poles on the second side of the odd-numbered layer of batteries located at the bottom layer are electrically connected through the second busbar and the second busbar is connected to the combiner box, the multiple second poles on the second side of the odd-numbered layer of batteries are electrically connected to the multiple first poles on the first side of the even-numbered layer of batteries through multiple connecting soft bars, and the multiple second poles on the second side of the even-numbered layer of batteries are electrically connected to the multiple first poles on the first side of the odd-numbered layer of batteries through multiple connecting soft bars, so that the multiple batteries are connected in series. The busbar and the connecting soft bar can be metal strips. In order to avoid battery short circuit caused by incorrect electrical connection of the connecting soft bars between the odd-numbered and even-numbered layer batteries, a protrusion can be set on the horizontal shelf. For example, after the positive and negative electrodes of the batteries of the first and second layers starting from the top layer are electrically connected in front, in order to prevent the batteries of the first and second layers from being electrically connected at the back, a protrusion is provided at the back of the horizontal shelf between the first and second layers to prevent the batteries of the first and second layers from being electrically connected at the back. Similarly, a protrusion may be provided at the front of the horizontal shelf between the second and third layers, at the back of the horizontal shelf between the third and fourth layers, at the front of the horizontal shelf between the fourth and fifth layers, etc. The protrusion can effectively prevent the wrong electrical connection of the connection row.

[0008] According to one embodiment, a normally open valve may be provided at the discharge port of the battery, and a pressure sensor and a solenoid valve may be provided on the discharge branch pipe in sequence. The pressure sensor is used to detect the pressure in the discharge branch pipe. When the pressure in the discharge branch pipe exceeds the first threshold value or the pressure increase rate in the exhaust pipe exceeds the pressure increase rate threshold value, the solenoid valve opens, and the fluid in the battery is discharged to the exhaust pipe via the discharge port and the discharge branch pipe. In other words, when a normally open valve is provided at the discharge port, the pressure and pressure increase rate in the discharge branch pipe are consistent with the pressure and pressure increase rate in the battery, and the pressure sensor provided on the discharge branch pipe can monitor the pressure and pressure increase rate in the battery in real time. If the normal gas production in the battery causes the internal pressure of the battery to exceed the first pressure threshold, the solenoid valve on the discharge branch pipe is opened to normally exhaust the battery, and the solenoid valve is closed after the exhaust is completed; if the battery failure causes a large amount of gas production in the battery, the pressure in the battery exceeds the first threshold or the boost speed exceeds the boost speed threshold, the solenoid valve on the discharge branch pipe is opened to quickly exhaust the faulty battery, and at the same time, a safety agent is injected into the battery through the injection port, and the safety agent is also discharged from the discharge branch pipe. After the faulty battery is safely handled, the normally open valve can be closed and the faulty battery can be removed. Or according to another embodiment, a discharge check valve can be provided at the discharge port of the battery, and a pressure sensor and a solenoid valve are provided on the discharge branch pipe in sequence. The pressure sensor is used to detect the pressure in the discharge branch pipe. When the pressure in the battery reaches the second threshold, the discharge check valve is opened, and the pressure in the discharge branch pipe is consistent with the pressure in the battery. Then, when the pressure in the discharge branch pipe exceeds the first threshold or the boost speed in the exhaust pipe exceeds the boost speed threshold, the solenoid valve is opened, and the fluid in the battery is discharged to the exhaust pipe through the discharge port and the discharge branch pipe, wherein the second threshold is less than the first threshold. That is to say, when a discharge check valve is provided at the discharge port of the battery, when the internal pressure of the battery is lower than the second threshold, the discharge check valve is closed, and the pressure sensor on the discharge branch pipe is prevented from being exposed to the corrosive gas environment inside the battery, so that the life and sensitivity of the pressure sensor can be ensured; when the internal pressure of the battery exceeds the second threshold, the discharge check valve is opened, so that the pressure and the boost speed in the discharge branch pipe are consistent with the pressure and the boost speed in the battery, and the pressure sensor provided on the discharge branch pipe can monitor the pressure and the boost speed in the battery in real time. If the normal gas production in the battery causes the internal pressure of the battery to exceed the first pressure threshold, the solenoid valve on the discharge branch pipe is opened to exhaust the battery normally, and the solenoid valve and the discharge check valve are closed after the exhaust is completed; if the battery fails and causes a large amount of gas production in the battery, the pressure in the battery exceeds the first threshold or the boost speed exceeds the boost speed threshold, the solenoid valve on the discharge branch pipe is opened to quickly exhaust the faulty battery, and at the same time, a safety agent is injected into the battery through the injection port, and the safety agent is also discharged from the discharge branch pipe. After the faulty battery is safely handled, the discharge check valve can be closed and the faulty battery can be removed.

[0009] A safety agent storage tank can be set in the first space, and the safety agent storage tank can be connected to the injection ports of multiple batteries via the injection main pipe and multiple injection branches. An injection check valve is set at the injection port, and a solenoid valve is set on the injection branch. When the solenoid valve and the injection check valve are opened, the safety agent enters the battery through the injection branch and the injection port. In other words, a safety agent storage tank is provided in the battery cabinet, and the safety agent storage tank is often connected to each battery through the injection main pipe and the injection branch. When a battery failure is detected, the battery control system immediately opens the injection check valve of the injection port of the faulty battery, and uses a liquid pump, high-pressure gas, etc. to inject the safety agent in the safety agent storage tank into the faulty battery. The safety agent can be: one or more of carbon dioxide, nitrogen, argon, helium, sulfur dioxide, heptafluoropropane, dodecafluoro-2-methyl-3-pentanone, etc.; or, one or more of alkyl phosphates, aromatic phosphates, phosphites, phosphazenes, phosphorus-halogen organic compounds, tricresyl phosphate, dimethyl methyl phosphate, hexamethylphosphoramide, tetrabromobisphenol, phosphaphenanthrene derivatives, nitrogen phosphorene additives and phosphazene compounds, etc.; or, water, silicone oil, dry powder fire extinguishing agent, foam fire extinguishing agent or aerosol fire extinguishing agent, etc.

[0010] In addition to injecting safety agents into the battery, maintenance fluid can also be injected into the battery through the battery injection port. The maintenance fluid can be an electrolyte to replenish the battery and extend the battery life; the maintenance fluid can also be a cleaning fluid, which can be carbonates, carboxylates, ethers, nitriles, organic acids and bases, etc. For example, the cleaning fluid is ethylene carbonate, dimethyl carbonate, ethyl acetate, tetrahydrofuran, 1,2-dimethoxyethane, acetonitrile, carboxylic acid, triethylamine, etc. A maintenance fluid storage tank can be provided on the outside of the battery cabinet. When the injection branch pipe is removed from the injection port, the maintenance fluid storage tank is connected to the injection port of the battery via the maintenance fluid pipeline, and the maintenance fluid is injected into the battery when the one-way valve in the injection port is opened. That is to say, when it is necessary to inject maintenance fluid into the battery, the injection branch pipe is first removed from the battery, and then the maintenance fluid pipeline for injecting maintenance fluid is connected to the battery. After injecting the maintenance fluid, the maintenance fluid pipeline is removed from the battery, and then the injection branch pipe is connected to the battery. Alternatively, a maintenance liquid storage tank is provided outside the battery cabinet, a three-way valve is provided at the portion of the injection branch pipe near the injection check valve, the maintenance liquid storage tank is connected to the three-way valve via the maintenance liquid pipeline, and when the injection check valve in the injection port is opened, the three-way valve is used to control the safety agent or maintenance liquid to be injected into the battery via the injection branch pipe. That is to say, a three-way valve is provided on the injection branch pipe, the first interface of the three-way valve leads to the battery, and the second interface leads to the injection main pipe, so that the safety agent can enter the battery via the injection main pipe and the injection branch pipe, and the third interface of the three-way valve can be connected to the maintenance liquid pipeline at all times or when needed, so that the maintenance liquid can enter the battery via the maintenance liquid pipeline and the injection branch pipe. Alternatively, a maintenance liquid storage tank is provided outside the battery cabinet, a three-way valve is provided on the injection main pipe, the maintenance liquid storage tank is connected to the three-way valve via the maintenance liquid pipeline, and when the injection check valve in the injection port and the solenoid valve on the injection branch pipe are opened, the three-way valve is used to control the safety agent or maintenance liquid to be injected into the battery via the injection main pipe and the injection branch pipe. That is to say, a three-way valve is provided on the injection main pipe, the first interface of the three-way valve leads to the injection branch pipe and the battery, and the second interface leads to the safety agent storage tank, so that the safety agent can enter the battery through the injection main pipe and the injection branch pipe, and the third interface of the three-way valve can be connected to the maintenance liquid pipeline at all times or when needed, so that the maintenance liquid can enter the battery through the maintenance liquid pipeline, the injection main pipe, and the injection branch pipe. In addition, a three-way valve can be provided at the injection port, and a safety agent storage tank is provided in the first space, and the safety agent storage tank is connected to multiple three-way valves via the injection main pipe and multiple injection branches, respectively. A maintenance liquid storage tank is provided outside the battery cabinet, and the maintenance liquid storage tank is connected to multiple three-way valves via the maintenance liquid main pipe and multiple maintenance liquid branches, respectively, and the injection of the safety agent or maintenance liquid into the battery is controlled by the three-way valve.That is to say, two sets of pipelines can also be connected through a three-way valve at the injection port of each battery, one set is an injection branch pipe and an injection main pipe for injecting a safety agent, and the other set is a maintenance liquid branch pipe and a maintenance liquid main pipe for injecting a maintenance liquid. Both sets of pipelines are often connected to the injection port, and the three-way valve is controlled as needed to realize the injection of the safety agent or the maintenance liquid.

[0011] A liquid coolant injection main pipe for injecting liquid coolant and a liquid coolant discharge main pipe for discharging liquid coolant are arranged in the first space and / or the third space. The liquid coolant injection main pipe and the liquid coolant discharge main pipe are connected to the liquid coolant storage tank outside the battery cabinet. A liquid coolant injection port and a liquid coolant discharge port are arranged on the first side of the battery. The liquid coolant injection port is connected to the liquid coolant injection main pipe via a liquid coolant injection branch pipe, and the liquid coolant discharge port is connected to the liquid coolant discharge main pipe via a liquid coolant discharge branch pipe. The liquid coolant is injected into the cooling system inside the battery via the liquid coolant injection main pipe, the liquid coolant injection branch pipe, and the liquid coolant injection port, and then discharged from the cooling system inside the battery via the liquid coolant discharge port, the liquid coolant discharge branch pipe, and the liquid coolant discharge main pipe. In addition, it should be pointed out here that the liquid coolant injection port and the liquid coolant discharge port of the batteries located in the odd-numbered layers can be set on the first side of the battery, for example, and the liquid coolant injection port and the liquid coolant discharge port of the batteries located in the even-numbered layers can be set on the second side of the battery. When the batteries in the odd-numbered layers and the batteries in the even-numbered layers are placed upside down front and back, the liquid coolant injection ports and the liquid coolant discharge ports of the batteries in the odd-numbered layers and the batteries in the even-numbered layers are respectively aligned, thereby simplifying the structure of the liquid coolant injection and discharge pipelines.

[0012] A waste discharge side collection box and a liquid inlet side collection box are provided on the lower surface of the top plate of the battery rack. The waste discharge side collection box and the liquid inlet side collection box are located in the second space. The liquid inlet side collection box is close to the first space and is used for the line connection of the battery close to the first space. The waste discharge side collection box is close to the third space and is used for the line connection of the battery close to the third space. The collection box is used to collect the signal and power lines of the sensor and solenoid valve, which is convenient for the simple arrangement of the system cables. In addition, a groove can be set on the protruding part of the horizontal shelf located in the second space. The waste discharge side in the third space collects the sensor and solenoid valve lines in groups, such as a group of 5 batteries. After the collection lines are collected, they are embedded in the groove and pulled to the battery cabinet management system in the first space.

[0013] A square frame-shaped support portion is provided below the bottom plate of the battery rack. The frame-shaped support portion is provided with at least one opening, and the at least one opening is used to lead the injection or discharge pipe out of the battery cabinet and connect with the pipe and system outside the battery cabinet. In addition, a narrow and long opening for a forklift can also be provided on the frame-shaped support portion. The frame-shaped support portion can be integrally formed with the bottom plate of the battery rack.

[0014] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0015] The advantages of the utility model are:

[0016] 1) Each battery in the energy storage battery cabinet can monitor internal signals in real time and inject safety agents into the battery to achieve safety control at the cell level, greatly improving the safety of the energy storage system; the batteries are connected in series in a zigzag shape through multiple poles, which can effectively shunt current and prevent the increase of battery overpotential and pole heating caused by current accumulation;

[0017] 2) All batteries in the energy storage battery cabinet share a waste discharge channel. The waste discharge pipe arranged on the side is a square cylinder with a large aspect ratio. The volume of the battery cabinet is minimized while ensuring sufficient discharge space. Battery thermal runaway sensors, explosion vents and / or explosion-proof fans are arranged on the waste discharge pipe to eliminate interference from the external environment, prevent false signal alarms, and improve the accuracy of accident warnings of thermal runaway sensors. When a battery fails and the exhaust solenoid valve is opened, the explosion vent and / or explosion-proof fan are opened at the same time to help the battery quickly discharge the gas generated after thermal runaway and prevent gas accumulation;

[0018] 3) The injection nozzle of the energy storage battery cabinet can be shared by the safety agent and the maintenance fluid, which can not only provide a channel for the safety agent to enter when the battery is running, but also provide an access port when the battery needs to be replenished and replaced, saving pipeline layout and cost;

[0019] 4) The horizontal shelves of the energy storage battery cabinet can be used to place batteries, and the protrusion design can also prevent incorrect battery connection, making it convenient for the wiring layout of the battery cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1( a ) and FIG. 1( b ) are a plan view and a perspective view of a battery rack of a battery cabinet;

[0021] Figure 2(a) and Figure 2(b) are a plan view and a perspective view of a partially installed battery cabinet;

[0022] FIG. 3( a ) and FIG. 3( b ) are three-dimensional schematic diagrams showing the connection between the battery and the pipeline;

[0023] FIG. 4( a ) and FIG. 4( b ) are three-dimensional schematic diagrams showing an integral battery cabinet.

[0024] Reference numerals list

[0025] 101 - Top Plate

[0026] 102——Baseboard

[0027] 103——Pillar

[0028] 104——Vertical board

[0029] 105——Horizontal shelf

[0030] 106——Frame-shaped support

[0031] 107——Ribs

[0032] 108 - Gas opening

[0033] 1a——First Space

[0034] 1b——Second Space

[0035] 1c——Third Space

[0036] 2——Waste discharge pipe

[0037] 3——Battery cabinet management system

[0038] 4——Combiner box

[0039] 5. Safety agent storage tank

[0040] 6a——Liquid inlet side junction box

[0041] 6b——Waste discharge side junction box

[0042] 7——Large horizontal battery

[0043] 701——Injection port

[0044] 702——Discharge port

[0045] 703——Positive pole

[0046] 704——Negative pole

[0047] 705——First busbar

[0048] 706——Second busbar

[0049] 707——Connecting to the soft row

[0050] 708 - Liquid coolant injection port

[0051] 709——Liquid coolant discharge port

[0052] 8——Injection main

[0053] 801——Injection branch

[0054] 901——Discharge branch pipe

[0055] 11——Liquid coolant injection main pipe

[0056] 1101——Liquid coolant injection branch pipe

[0057] 12——Liquid coolant discharge main pipe

[0058] 1201——Liquid coolant discharge branch pipe DETAILED DESCRIPTION

[0059] The present invention will be further described below through embodiments in conjunction with the accompanying drawings.

[0060] FIG. 1(a) and FIG. 1(b) are plan views and stereo views of a battery rack of a battery cabinet. As shown in FIG. 1(a) and FIG. 1(b), the battery rack includes a top plate 101, a bottom plate 102, four columns 103, two vertical plates 104, and a plurality of horizontal shelves 105. A frame-shaped support portion 106 is provided below the bottom plate 102, and the frame-shaped support portion 106 is provided with through holes for pipes to pass through and a narrow opening for forklifts to insert. The top plate 101, the columns 103 located at the four corners, and the bottom plate 102 together form a space. The top plate 101, the columns 103, the bottom plate 102, and the frame-shaped support portion 106 can be an integral frame formed in one piece. The two vertical plates 104 are parallel to each other and to the sides of the frame, thereby dividing the space in the frame into a first space 1a, a second space 1b, and a third space 1c. A plurality of horizontal shelves 105 are installed between the two vertical plates 104 to place a plurality of batteries. A grid frame composed of horizontal ribs and vertical ribs is provided between the two columns of the first space 1a, and vertical ribs are provided between the two columns 103 of the third space 1c. The grid frame or ribs 107 can be used to install and fix devices, components, pipes, etc. in the first space 1a and the third space 1c, and are beneficial to the structural reinforcement of the battery rack.

[0061] A square cylindrical waste discharge pipe 2 extending in the height direction of the battery rack is provided in the third space 1c. The upper end of the waste discharge pipe 2 is connected to the gas opening 108 provided on the top plate 101. The gas opening 108 can be connected to the external waste gas treatment and emptying system through a pipe for exhaust. The lower end of the waste discharge pipe 2 is connected to the liquid opening provided on the bottom plate 102. The liquid opening can be connected to the external waste liquid treatment system through a pipe for draining liquid. One side wall of the square cylindrical waste discharge pipe 2 is inclined toward the inside of the waste discharge pipe, so that the liquid in the waste discharge pipe can be concentrated. A plurality of connection ports are provided on the waste discharge pipe 2, and the discharge port of each battery is respectively connected to the connection port on the waste discharge pipe 2 via a discharge branch pipe. When the fluid in the battery is discharged to the waste discharge pipe 2 via the discharge branch pipe, the gas rises along the waste discharge pipe 2 and is discharged through the gas opening 108 of the top plate 101, and the liquid flows down along the waste discharge pipe 2 and is discharged through the liquid opening of the bottom plate 102. In order to reduce the overall volume of the battery rack, the volume of each space is reduced as much as possible. Therefore, when the third space is narrow, the square cylindrical exhaust pipe can have a larger aspect ratio, thereby ensuring the flow rate of the exhaust pipe.

[0062] FIG2(a) and FIG2(b) are plan and stereograms of a partially installed battery cabinet. As can be seen from FIG2(a) and FIG2(b), a battery cabinet management system 3, a junction box 4 and a safety agent storage tank 5 can be set in the first space of the battery rack. The battery cabinet management system 3, the junction box 4 and the safety agent storage tank 5 can be installed and fixed on the ribs 107 between the battery rack columns. The battery cabinet management system 3 is used for the voltage, current and temperature signal acquisition, charge and discharge management of the batteries in the battery cabinet, and the signal acquisition and transmission of the solenoid valve and pressure sensor and the valve opening and closing management. The junction box 4 is used to converge and centrally lead the positive and negative currents of the battery cabinet. It can be equipped with a fuse, an isolating switch, a current sensor, etc. to ensure that the battery cabinet current is cut off when an abnormality occurs in the system. The safety agent storage tank 5 stores safety agents, which are used to inject safety agents into faulty batteries, reduce the safety hazards of the battery cabinet, and prevent the faulty batteries from causing the combustion and explosion of the batteries in the battery cabinet. A liquid inlet side junction box 6a and a waste discharge side junction box 6b are arranged on the portion of the top plate located in the second space. The liquid inlet side junction box 6a is close to the first space and is used for connecting the lines of the battery on the side close to the first space. The waste discharge side junction box 6b is close to the third space and is used for connecting the lines of the battery on the side close to the third space. The junction boxes are used for collecting signals and power lines of sensors and solenoid valves, so as to facilitate the convenient and concise arrangement of system cables.

[0063] Figures 3(a) and 3(b) are three-dimensional schematic diagrams showing the connection between the battery and the pipeline. In order to clearly show the connection between the battery and the pipeline, the columns, ribs, battery cabinet management system, etc. are not shown in the figure. In the embodiment shown in the figure, 16 large horizontal batteries 7 are placed in the second space of the battery cabinet, and each battery is placed on a horizontal shelf. From top to bottom, the odd-numbered layers of batteries are the same as the even-numbered layers of batteries except that the injection port 701 and the discharge port 702 are arranged oppositely. When the odd-numbered layers of batteries and the even-numbered layers of batteries are placed upside down on the battery rack, the positive pole 703 of the odd-numbered layer of batteries and the negative pole 704 of the even-numbered layer of batteries are located on the same side, and the negative pole 704 of the odd-numbered layer of batteries and the positive pole 703 of the even-numbered layer of batteries are located on the same side, so as to facilitate the series connection of the positive and negative poles of the upper and lower batteries. The top odd-numbered layer of batteries, such as all five positive poles 703, are electrically connected via the first busbar 705, and the first busbar 705 is connected to the combiner box. The bottom even-numbered layer of batteries, such as all five negative poles 704, are electrically connected via the second busbar 706, and the second busbar 706 is connected to the combiner box. In addition, the five negative poles 704 of the odd-numbered layer of batteries are electrically connected to the five positive poles 703 of the even-numbered layer of batteries via five connecting soft bars 707, respectively, and the five negative poles 704 of the even-numbered layer of batteries are electrically connected to the five positive poles 703 of the odd-numbered layer of batteries via five connecting soft bars 707, respectively, thereby completing the series connection of all batteries in the entire battery cabinet.

[0064] The injection port 701 and the discharge port 702 of the odd-numbered layer of batteries from top to bottom are arranged opposite to the injection port 701 and the discharge port 702 of the even-numbered layer of batteries. When the odd-numbered layer of batteries and the even-numbered layer of batteries are placed in the battery cabinet upside down, the injection ports 701 of all batteries are located on the same side of the battery rack and aligned up and down, and the discharge ports 702 of all batteries are located on the same side of the battery rack and aligned up and down. An injection main pipe 8 can be arranged in the first space, and 16 injection branches 801 are branched from the injection main pipe 8, each injection branch pipe 801 is respectively connected to the injection port 701 of each layer of batteries and can be removed. An injection check valve is arranged in the injection port 701 of the battery, and an electromagnetic valve is arranged on the injection branch pipe 801. The injection main pipe 8 is connected to the safety agent storage tank arranged in the first space. When a battery fails, the injection check valve and the electromagnetic valve are opened, and the safety agent is injected from the safety agent storage tank into the faulty battery via the injection main pipe 8 and the injection branch pipe 801. When the battery needs to be replenished, for example, the injection branch pipe 801 can be disconnected from the injection port 701 of the battery, and the maintenance liquid storage tank can be connected to the injection port 701 via the maintenance liquid pipeline. After the battery is replenished, the maintenance liquid pipeline can be disconnected from the injection port 701, and the injection branch pipe 801 can be connected to the injection port 701 of the battery. A waste discharge pipe 2 is provided in the third space, and the discharge port 702 of the battery is connected to the connection port on the waste discharge pipe 2 via the discharge branch pipe 901. A normally open valve such as an angle ball valve is provided at the discharge port 702 of the battery, a pressure sensor is provided at the portion of the discharge branch pipe 901 close to the normally open valve, and a solenoid valve is provided at the portion of the discharge branch pipe 901 close to the waste discharge pipe 2. When the pressure sensor detects that the pressure in the battery is greater than 10KPa or the pressure increase rate is ≥1KPa / s, the solenoid valve opens, and the fluid in the battery enters the waste discharge pipe 2 via the discharge branch pipe 901. After the battery fails and the hidden danger is eliminated by injecting a safety agent, the normally open valve of the battery can be closed, and then the failed battery can be removed.

[0065] In the embodiments shown in FIG. 3( a) and FIG. 3( b), a liquid coolant injection manifold 11 and a liquid coolant discharge manifold 12 are respectively provided in the first space and the third space. When the liquid coolant injection port 708 and the liquid coolant discharge port 709 are close to the first space, the liquid coolant injection port 708 and the liquid coolant discharge port 709 of the battery can be connected to the liquid coolant injection manifold 11 and the liquid coolant discharge manifold 12 in the first space via the liquid coolant injection branch pipe 1101 and the liquid coolant discharge branch pipe 1201, respectively; when the liquid coolant injection port 708 and the liquid coolant discharge port 709 are close to the third space, the liquid coolant injection port 708 and the liquid coolant discharge port 709 of the battery can be connected to the liquid coolant injection manifold 11 and the liquid coolant discharge manifold 12 in the third space via the liquid coolant injection branch pipe 1101 and the liquid coolant discharge branch pipe 1201, respectively.

[0066] Figures 4(a) and 4(b) are three-dimensional schematic diagrams showing the overall battery cabinet. For the sake of clarity, the cabinet door and cabinet wall of the battery cabinet are not shown. It can be seen that the battery cabinet management system 3, junction box 4, safety agent storage tank 5, injection main pipe, liquid coolant injection main pipe and liquid coolant discharge main pipe are installed in the first space of the battery cabinet, and the large horizontal battery 7 and junction box are placed in the second space of the battery cabinet. The waste pipe 2 and the liquid coolant injection main pipe and liquid coolant discharge main pipe are set in the third space of the battery cabinet. The space in the entire battery cabinet is fully and reasonably utilized, and the circuit and pipeline lines are simple.

[0067] The specific embodiments of the utility model are not intended to limit the utility model. Any technician familiar with the field can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the utility model without departing from the scope of the technical solution of the utility model, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of protection of the technical solution of the utility model.

Claims

1. A battery cabinet, characterized in that: The battery cabinet includes a battery rack and a plurality of batteries, and the battery rack includes a top plate, a bottom plate, four columns, two vertical plates and a plurality of horizontal shelves. The top plate and the bottom plate are connected by the four columns to form a space, and the two vertical plates are parallel to each other and divide the space into a first space, a second space and a third space. The battery cabinet management system and the junction box are installed in the first space. In the second space, the plurality of horizontal shelves are connected between the two vertical plates to place a plurality of batteries. Each battery is provided with an injection port for injecting fluid into the battery and a discharge port for discharging fluid from the battery. A waste discharge pipe is provided in the third space, and the waste discharge pipe is a cylindrical pipe extending in the height direction of the battery cabinet. shape, a gas opening is provided on the top plate and the upper end of the waste pipe is connected to the gas opening, a liquid opening is provided on the bottom plate and the lower end of the waste pipe is connected to the liquid opening, the gas opening can be connected to an external waste gas treatment and emptying system through a pipeline for exhaust, the liquid opening can be connected to an external waste liquid treatment system through a pipeline for draining liquid, the lower part of the barrel wall of the waste pipe is inclined toward the inside of the liquid drainage pipe to collect the liquid in the liquid drainage pipe, a plurality of connection ports are provided on the waste drainage pipe, the discharge port of each battery is respectively connected to the connection port on the waste drainage pipe via a discharge branch pipe, and the battery is connected to the battery cabinet management system and the junction box via a line.

2. The battery cabinet according to claim 1, characterized in that: The number of the multiple batteries is 16 to 24, one battery is placed on each horizontal shelf, odd-numbered layers of batteries are placed on odd-numbered layers from top to bottom, and even-numbered layers of batteries are placed on even-numbered layers from top to bottom, the first side of the odd-numbered layers of batteries is provided with the discharge port and multiple first poles, and the second side opposite to the first side is provided with the injection port and multiple second poles, the first side of the even-numbered layers of batteries is provided with the injection port and multiple first poles, and the second side opposite to the first side is provided with the discharge port and multiple second poles, the first side of the odd-numbered layers of batteries and the second side of the even-numbered layers of batteries are located on the same side of the battery cabinet, and the discharge port of the even-numbered layers of batteries is aligned vertically with the discharge port of the odd-numbered layers of batteries.

3. The battery cabinet according to claim 2, characterized in that: The plurality of first poles on the first side of the odd-numbered layer of batteries located at the top layer are electrically connected through a first busbar and the first busbar is connected to the combiner box, the plurality of second poles on the second side of the even-numbered layer of batteries located at the bottom layer are electrically connected through a second busbar and the second busbar is connected to the combiner box, the plurality of second poles on the second side of the odd-numbered layer of batteries are electrically connected to the plurality of first poles on the first side of the even-numbered layer of batteries through a plurality of connecting flexible bars, respectively, and the plurality of second poles on the second side of the even-numbered layer of batteries are electrically connected to the plurality of first poles on the first side of the odd-numbered layer of batteries through a plurality of connecting flexible bars, respectively, so that the plurality of batteries are connected in series; or The plurality of first poles on the first side of the odd-numbered layer of batteries located at the top layer are electrically connected through a first busbar and the first busbar is connected to the combiner box, the plurality of second poles on the second side of the odd-numbered layer of batteries located at the bottom layer are electrically connected through a second busbar and the second busbar is connected to the combiner box, the plurality of second poles on the second side of the odd-numbered layer of batteries are electrically connected to the plurality of first poles on the first side of the even-numbered layer of batteries through a plurality of connecting flexible bars, respectively, and the plurality of second poles on the second side of the even-numbered layer of batteries are electrically connected to the plurality of first poles on the first side of the odd-numbered layer of batteries through a plurality of connecting flexible bars, respectively, so that the plurality of batteries are connected in series.

4. The battery cabinet according to claim 1, characterized in that: A normally open valve is provided at the discharge port of the battery, and a pressure sensor and a solenoid valve are provided on the discharge branch pipe in sequence, the pressure sensor is used to detect the pressure in the discharge branch pipe, when the pressure in the discharge branch pipe exceeds a first threshold value or the pressure increase rate in the exhaust pipe exceeds a pressure increase rate threshold value, the solenoid valve opens, and the fluid in the battery is discharged to the exhaust pipe via the discharge port and the discharge branch pipe; or, a discharge check valve is provided at the discharge port of the battery, and a pressure sensor and a solenoid valve are provided on the discharge branch pipe in sequence, the pressure sensor is used to detect the pressure in the discharge branch pipe, when the pressure in the battery reaches a second threshold value, the discharge check valve opens, when the pressure in the discharge branch pipe exceeds a first threshold value or the pressure increase rate in the exhaust pipe exceeds a pressure increase rate threshold value, the solenoid valve opens, and the fluid in the battery is discharged to the exhaust pipe via the discharge port and the discharge branch pipe, and the second threshold value is less than the first threshold value.

5. The battery cabinet according to claim 1, characterized in that: A safety agent storage tank is arranged in the first space, and the safety agent storage tank is connected to the injection ports of the multiple batteries respectively via an injection main pipe and multiple injection branches, an injection check valve is arranged on the injection port, and an electromagnetic valve is arranged on the injection branch, when the electromagnetic valve and the injection check valve are opened, the safety agent enters the battery via the injection branch and the injection port.

6. The battery cabinet according to claim 5, characterized in that: A maintenance liquid storage tank is provided outside the battery cabinet. When the injection branch pipe is removed from the injection port, the maintenance liquid storage tank is connected to the injection port of the battery via a maintenance liquid pipeline, and maintenance liquid is injected into the battery when the injection check valve in the injection port is opened; or, a maintenance liquid storage tank is provided outside the battery cabinet, a three-way valve is provided at a portion of the injection branch pipe close to the injection check valve, the maintenance liquid storage tank is connected to the three-way valve via a maintenance liquid pipeline, and when the injection check valve in the injection port is opened, the safety agent or maintenance liquid is controlled to be injected into the battery through the injection branch pipe through the three-way valve; or, a maintenance liquid storage tank is provided outside the battery cabinet, a three-way valve is provided on the injection main pipe, the maintenance liquid storage tank is connected to the three-way valve via a maintenance liquid pipeline, and when the injection check valve in the injection port and the solenoid valve on the injection branch pipe are opened, the safety agent or maintenance liquid is controlled to be injected into the battery through the injection main pipe and the injection branch pipe through the three-way valve.

7. The battery cabinet according to claim 1, characterized in that: A three-way valve is arranged at the injection port, a safety agent storage tank is arranged in the first space, the safety agent storage tank is connected to the multiple three-way valves via an injection main pipe and multiple injection branches, a maintenance liquid storage tank is arranged outside the battery cabinet, the maintenance liquid storage tank is connected to the multiple three-way valves via a maintenance liquid main pipe and multiple maintenance liquid branches, and the safety agent or maintenance liquid is injected into the battery through the three-way valve.

8. The battery cabinet according to claim 1, characterized in that: A liquid coolant injection main pipe for injecting liquid coolant and a liquid coolant discharge main pipe for discharging liquid coolant are arranged in the first space and / or the third space, and the liquid coolant injection main pipe and the liquid coolant discharge main pipe are connected to the liquid coolant storage tank outside the battery cabinet, and a liquid coolant injection port and a liquid coolant discharge port are arranged on the first side of the battery, the liquid coolant injection port is connected to the liquid coolant injection main pipe via a liquid coolant injection branch pipe, and the liquid coolant discharge port is connected to the liquid coolant discharge main pipe via a liquid coolant discharge branch pipe, and the liquid coolant is injected into the cooling system inside the battery via the liquid coolant injection main pipe, the liquid coolant injection branch pipe, and the liquid coolant injection port, and then discharged from the cooling system inside the battery via the liquid coolant discharge port, the liquid coolant discharge branch pipe, and the liquid coolant discharge main pipe.

9. The battery cabinet according to claim 1, characterized in that: A waste discharge side assembly box and a liquid inlet side assembly box are provided on the lower surface of the top plate of the battery rack, and the waste discharge side assembly box and the liquid inlet side assembly box are located in the second space, the liquid inlet side assembly box is close to the first space and is used for connecting the lines of the battery on the side close to the first space, and the waste discharge side assembly box is close to the third space and is used for connecting the lines of the battery on the side close to the third space.

10. The battery cabinet according to claim 1, characterized in that: A square frame-shaped support portion is provided below the bottom plate of the battery rack, and at least one opening is provided on the frame-shaped support portion. The at least one opening is used to lead the injection or discharge pipeline out of the battery cabinet and connect it to the pipeline and system outside the battery cabinet.

Images