Battery pack and energy storage system

Abstract

The utility model belongs to the technical field of energy storage batteries, and particularly discloses a battery pack, a liquid cooling pipeline is integrated on a bottom plate of the battery pack, two ends of the liquid cooling pipeline are respectively communicated with a water inlet and a water outlet on the bottom plate, and a cooling medium in the liquid cooling pipeline exchanges heat with a plurality of battery modules on the bottom plate. The end, close to the water outlet, of the liquid cooling pipeline is provided with the turbulent flow structure, the turbulent flow structure prolongs the heat exchange time of the cooling medium and the battery module at the position, and then uniform heat dissipation of the multiple battery modules is achieved. When any one of the temperature, the pressure, the hydrogen concentration, the carbon monoxide concentration or the combustible harmful gas concentration in the mounting space exceeds a corresponding safety threshold value, fire fighting equipment sprays a fire extinguishing agent into the mounting space through the fire fighting nozzle; and the fire-fighting measures can be taken by quick response before danger occurs, so that the safety is high. The utility model further provides an energy storage system which comprises fire fighting equipment and the battery pack.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage batteries, and in particular to a battery pack and an energy storage system. Background Art

[0002] With the continuous development of energy storage products, energy storage systems are increasingly being applied to social production and life. Energy storage systems are also developing in the direction of large-scale and high-energy storage. The economy and safety of energy storage systems have gradually become the focus of people's attention. In the energy storage system, if the voltage or capacity of a single battery pack is too low, it will affect the overall performance of the energy storage system, so higher consistency requirements are put forward for the battery pack. Among them, temperature is a factor that has a greater impact on the consistency of the battery pack. How to achieve uniform temperature of the battery pack during the use of the energy storage system is an effective way to solve the battery consistency in the energy storage system, and it is also the key to ensure the continuous and safe operation of the energy storage system.

[0003] At present, the common temperature control method of battery packs in energy storage systems still follows the methods and measures of electric vehicle power batteries, mainly including liquid cooling, air cooling or natural cooling. In the natural cooling method, the heat dissipation of the battery pack is uneven, and the temperature of the entire battery pack cannot be uniformed. Among the cooling measures such as liquid cooling and air cooling, air-cooled battery packs often adopt open or semi-open design schemes. The battery pack itself does not have good air tightness. When thermal runaway occurs in a single box, it is easy to cause thermal runaway to expand, causing greater danger; and because the air-cooled battery pack conducts heat by radiation heat dissipation, the thermal conductivity is low and the energy consumption is large. The liquid-cooled battery pack reduces the battery temperature through convection of the cooling medium, and has good heat dissipation efficiency, heat dissipation speed and temperature uniformity. It currently occupies the leading position in the market. However, there is a pressure drop at the end of the liquid cooling pipeline in the liquid-cooled battery pack, resulting in poor heat dissipation of the battery module at the end of the liquid cooling pipeline, which may have a temperature difference with other battery modules. This is a problem that needs to be solved.

[0004] In addition, in order to ensure the safety of the battery pack, existing battery packs are generally equipped with fire-fighting equipment to spray fire extinguishing agents when the temperature inside the battery pack is too high. However, in order to facilitate the entry of fire extinguishing agents, some existing battery packs are usually set as non-sealed structures, resulting in some of the sprayed fire extinguishing agents not entering the battery pack, reducing the fire extinguishing efficiency. Or in some closed-structure battery packs, the internal fire-fighting sensors use a single temperature sensor or a single smoke sensor to alarm, but when there is smoke, it means that the battery has begun to burn, and the alarm has a certain lag. Relying solely on temperature sensors is often prone to problems such as being far away from the heat source, resulting in untimely detection and poor safety. Utility Model Content

[0005] The purpose of the utility model is to provide a battery pack and energy storage system, in which the water outlet end of the liquid cooling base plate is designed with a spoiler to evenly take away the heat of each battery module, with good temperature uniformity, and through an all-in-one probe to monitor various information inside the battery pack in real time to trigger the start of fire-fighting equipment, with fast response speed and high safety.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In one aspect, the utility model provides a battery pack, comprising:

[0008] A bottom plate and an upper cover, wherein the bottom plate and the upper cover form a closed installation space;

[0009] A battery module, which is provided in a number of at least two, wherein at least two of the battery modules are both provided on the bottom plate, and the battery modules are both located in the installation space;

[0010] A liquid cooling pipeline is integrated on the bottom plate, two ends of the liquid cooling pipeline are respectively connected to a water inlet and a water outlet on the bottom plate, a turbulent structure is provided at one end of the liquid cooling pipeline close to the water outlet, a cooling medium flows in the liquid cooling pipeline, and the cooling medium exchanges heat with the battery module;

[0011] An all-in-one probe is arranged in the installation space and is connected to the main control board for communication. The all-in-one probe is used to detect information about the temperature, pressure, hydrogen concentration, carbon monoxide concentration, and combustible and harmful gas concentration in the installation space, and transmit the information to the main control board;

[0012] A fire-fighting nozzle is connected to the main control board and the fire-fighting equipment. When any one of the temperature, the pressure, the hydrogen concentration, the carbon monoxide concentration or the flammable and harmful gas concentration exceeds its corresponding safety threshold, the main control board triggers the fire-fighting equipment to turn on, and the fire-fighting equipment sprays the fire-extinguishing agent into the installation space through the fire-fighting nozzle.

[0013] Optionally, the liquid cooling pipeline is provided with at least four branches, the at least four branches are arranged in parallel, and each battery module corresponds to at least two branches;

[0014] A connecting pipe is provided on the branch corresponding to the battery module arranged near the water outlet, and the connecting pipe connects two adjacent branches. The connecting pipe is a spoiler structure on the branch arranged near the water outlet, and the spoiler structure is located at one end of the branch away from the water outlet.

[0015] Optionally, the base plate includes a first plate and a second plate, the first plate is located on a side close to the battery module, the second plate is located on a side away from the battery module, the water inlet and the water outlet are located on the same side of the first plate, and a protrusion is provided on the second plate, and the protrusion and the first plate are arranged to form the liquid cooling pipeline.

[0016] Optionally, the battery pack includes a BMS component, the BMS component includes a main control board, a temperature collector and a pressure collector, the main control board is communicatively connected with the temperature collector and the pressure collector, the temperature collector is used to collect the temperature signal of the battery module, and the pressure collector is used to collect the pressure signal of the battery module; when the temperature signal and the pressure signal exceed their corresponding safety thresholds, the main control board triggers the fire-fighting equipment to turn on, and the fire-fighting equipment sprays a fire-extinguishing agent into the installation space through the fire-fighting nozzle;

[0017] The upper cover is provided with a first opening, a first mounting plate is provided at the first opening, and the main control board is arranged on the first mounting plate.

[0018] Optionally, the upper cover is provided with a second opening, a second mounting plate is provided at the second opening, and a positive electrode plug-in, a negative electrode plug-in and a maintenance switch are provided on the second mounting plate;

[0019] At least two of the battery modules are connected in series, the positive electrode plug-in is connected to the positive electrode of the first battery module, the negative electrode plug-in is connected to the negative electrode of the last battery module, and the maintenance switch is arranged between two adjacent battery modules connected in series.

[0020] Optionally, the second mounting plate is further provided with a first communication interface and a second communication interface, and the first communication interface, the main control board, and the second communication interface are connected with the fire-fighting equipment to form an electrical connection loop.

[0021] Optionally, the battery pack further comprises a fuse, one end of the fuse is connected to the negative electrode of the last battery module, and the other end of the fuse is connected to the negative electrode plug-in.

[0022] Optionally, a sheet metal fixing is provided on the bottom plate, and the fuse and the all-in-one probe are detachably arranged on the sheet metal fixing.

[0023] Optionally, the upper cover is provided with an explosion-proof valve, and when the pressure in the installation space exceeds the opening pressure of the explosion-proof valve, the explosion-proof valve is opened; the fire-fighting nozzle is arranged on the upper cover and adjacent to the explosion-proof valve.

[0024] On the other hand, the utility model provides an energy storage system, including fire-fighting equipment and a battery pack in any of the above schemes, wherein the fire-fighting equipment is connected to a fire-fighting nozzle of the battery pack.

[0025] The beneficial effects of the utility model are:

[0026] The utility model provides a battery pack, the bottom plate of the battery pack is buckled with the upper cover to form a closed installation space, the liquid cooling pipeline is integrated on the bottom plate, the two ends of the liquid cooling pipeline are respectively connected to the water inlet and the water outlet on the bottom plate, a cooling medium flows in the liquid cooling pipeline, and the cooling medium exchanges heat with multiple battery modules on the bottom plate. A spoiler structure is provided at one end of the liquid cooling pipeline close to the water outlet, and the flow rate of the cooling medium at the end of the liquid cooling pipeline close to the water outlet is slowed down by the setting of the spoiler structure, which increases the heat exchange time between the cooling medium and the battery module at this location, and evenly takes away the heat of each battery module under different flow resistances on the basis of the "same path" of the cooling medium, thereby achieving uniform heat dissipation of multiple battery modules and good temperature uniformity. The battery pack also includes an all-in-one probe and a fire nozzle, and the all-in-one probe can detect the temperature, pressure, hydrogen concentration, carbon monoxide concentration and flammable and harmful gas concentration information in the installation space, and transmit the information to the main control board. When any of the temperature, pressure, hydrogen concentration, carbon monoxide concentration or flammable and harmful gas concentration in the installation space exceeds the corresponding safety threshold, the main control board will trigger the fire-fighting equipment to start. The fire-fighting equipment will spray fire extinguishing agent into the installation space through the fire nozzle to avoid the risk of fire and thermal runaway. Fire-fighting measures can be responded quickly before danger occurs, which is highly safe.

[0027] The utility model also provides an energy storage system, including fire-fighting equipment and the above-mentioned battery pack, wherein the fire-fighting equipment is connected to the fire-fighting nozzle of the battery pack. By adopting the above-mentioned battery pack design, on the one hand, the liquid cooling pipeline integrated on the bottom plate can evenly dissipate heat for multiple battery modules to ensure the normal operation of the battery modules; on the other hand, the all-in-one probe in the battery pack also makes the triggering of the fire-fighting equipment more sensitive, reduces the reaction time, and improves the safety of the energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the structure of the battery pack provided in the embodiment of the utility model;

[0029] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0030] Figure 3 is a front view of a battery pack provided in an embodiment of the utility model;

[0031] Figure 4 It is a structural schematic diagram of the bottom plate provided in an embodiment of the utility model;

[0032] Figure 5 is a bottom view of the base plate provided in the embodiment of the utility model;

[0033] Figure 6 It is an exploded view of the second mounting plate, the positive electrode plug-in, the negative electrode plug-in, the first communication interface, the second communication interface and the maintenance switch provided in the embodiment of the utility model.

[0034] In the figure:

[0035] 100, bottom plate; 110, first plate; 111, water inlet; 112, water outlet; 120, second plate; 130, frame; 140, fixed beam; 150, sheet metal fixing; 160, fixed support leg; 170, third sealing pad;

[0036] 200, upper cover; 210, first opening; 211, first mounting plate; 212, first connecting member; 213, first sealing gasket; 220, second opening; 221, second mounting plate; 222, second connecting member; 223, flange;

[0037] 300, battery module; 310, protective cover; 321, component connection copper bar; 322, positive electrode-positive electrode plug-in connection copper bar; 323, negative electrode-MSD connection copper bar; 324, positive electrode-MSD connection copper bar; 325, negative electrode-fuse connection copper bar; 326, fuse-negative electrode plug-in connection copper bar; 330, positive electrode plug-in; 340, negative electrode plug-in; 350, first communication interface; 360, second communication interface; 370, maintenance switch;

[0038] 400, liquid cooling pipeline; 410, branch line; 420, connecting pipeline;

[0039] 500, all-in-one probe; 600, fire nozzle;

[0040] 700, main control board; 800, fuse; 900, explosion-proof valve. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] like Figure 1-Figure 3As shown, this embodiment provides a battery pack, which includes a base plate 100, an upper cover 200, at least two battery modules 300 and a liquid cooling pipeline 400. The base plate 100 and the upper cover 200 are interlocked and enclosed to form a closed installation space, at least two battery modules 300 are arranged on the base plate 100, and all battery modules 300 are located in the above-mentioned installation space. The liquid cooling pipeline 400 is integrated on the base plate 100, and the two ends of the liquid cooling pipeline 400 are respectively connected to the water inlet 111 and the water outlet 112 located on the base plate 100. A cooling medium flows in the liquid cooling pipeline 400, and the cooling medium exchanges heat with multiple battery modules 300. A spoiler structure is provided at one end of the liquid cooling pipeline 400 near the water outlet 112. Through the setting of the spoiler structure, the flow velocity of the cooling medium at the end of the liquid cooling pipeline 400 near the water outlet 112 is slowed down, thereby increasing the heat exchange time between the cooling medium and the battery module 300 there. On the basis of the "same path" of the cooling medium and with different flow resistances, the heat of each battery module 300 is evenly taken away, thereby achieving even heat dissipation of multiple battery modules 300 and good temperature uniformity.

[0046] Furthermore, the battery pack in this embodiment also includes an all-in-one probe 500 and a fire nozzle 600. The all-in-one probe 500 is arranged in the installation space and is connected to the main control board 700 for communication. The all-in-one probe 500 can detect the temperature, pressure, hydrogen concentration, carbon monoxide concentration and flammable and harmful gas concentration in the installation space, and transmit the information to the main control board 700. The fire nozzle 600 is connected to the main control board 700 and the fire fighting equipment. When any one of the temperature, pressure, hydrogen concentration, carbon monoxide concentration or flammable and harmful gas concentration in the installation space exceeds its corresponding safety threshold, the main control board 700 will trigger the fire fighting equipment to start, and the fire fighting equipment will spray the fire extinguishing agent into the installation space through the fire nozzle 600 to avoid the risk of fire and thermal runaway. The all-in-one probe 500 in this embodiment can detect a variety of information in the installation space (including the temperature, pressure, hydrogen concentration, carbon monoxide concentration and flammable and harmful gas concentration in the installation space) to trigger the start of the fire fighting equipment, and can quickly respond to fire fighting measures before danger occurs, with high safety.

[0047] As an optional solution, the all-in-one probe 500 in this embodiment includes a temperature sensor, a pressure sensor and a gas concentration detector. The temperature in the installation space is detected by the temperature sensor, the pressure in the installation space is detected by the pressure sensor, and the hydrogen concentration, carbon monoxide concentration and combustible and harmful gas concentration in the installation space are detected by the gas concentration detector. The main control board 700 can compare the information detected by the all-in-one probe 500 with its corresponding safety threshold, and judge whether to turn on the fire-fighting equipment based on this. The all-in-one probe 500 has a high degree of integration, occupies a small space, and is conveniently and reasonably arranged on the base plate 100.

[0048] See also Figure 4 and Figure 5 The bottom plate 100 in this embodiment includes a first plate 110 and a second plate 120. The first plate 110 is located on a side close to the battery module 300, and the second plate 120 is located on a side away from the battery module 300. The battery module 300 is connected to a fixed beam 140 provided on the first plate 110. The water inlet 111 and the water outlet 112 are located on the same side of the first plate 110. The second plate 120 is provided with a protrusion, and the protrusion and the first plate 110 are surrounded to form the above-mentioned liquid cooling pipeline 400. Optionally, the bottom plate 100 in this embodiment can be made by a blowing process. And in order to increase its mechanical strength, a frame 130 can also be welded on the side of the first plate 110 and the second plate 120. Compared with the liquid cooling pipeline 400 made by stretching the profile, the processing and forming process of the liquid cooling pipeline 400 in this embodiment is simpler and more economical. The liquid cooling pipeline 400 is provided with at least four branches 410, and at least four branches 410 are arranged in parallel, and each battery module 300 corresponds to at least two branches 410. A connecting pipeline 420 is provided on the branch 410 corresponding to the battery module 300 arranged near the water outlet 112, and the connecting pipeline 420 connects two adjacent branches 410. The connecting pipeline 420 is a spoiler structure on the branch 410 arranged near the water outlet 112, and the spoiler structure is located at one end of the branch 410 away from the water outlet 112.

[0049] For example, see Figure 5 This embodiment is described by taking four battery modules 300 in a battery pack as an example, and each battery module 300 is provided with two branches 410. Each battery module 300 is located at Figure 5There are four regions marked as a, b, c, and d, and two branches 410 are provided in each region of a, b, c, and d. That is to say, in this embodiment, the liquid cooling pipeline 400 has a total of eight branches 410, and these eight branches 410 are arranged in parallel. Among them, the two branches 410 in the d region are the two branches 410 closest to the water outlet 112, and the two branches 410 are connected through multiple connecting pipes 420, and the multiple connecting pipes 420 are all located on the side away from the water outlet 112. Through the setting of these connecting pipes 420, the flow resistance of the cooling medium at the end of the two branches 410 in the d region away from the water outlet 112 is increased, and the flow rate of the cooling medium at the far end of the water outlet 112 is slowed down, thereby ensuring that the two ends of the battery module 300 corresponding to the d region are evenly cooled, and the temperature difference between the battery modules 300 corresponding to the other a, b, and c regions is small, and the temperature of the battery modules 300 in the entire battery pack is relatively uniform. Furthermore, since the distance between area c and the water inlet 111 is relatively far, in some embodiments, two adjacent branches 410 in area c and area d can also be connected through a connecting pipe 420 to reduce the temperature difference between the battery modules 300 corresponding to areas c and d and the battery modules 300 corresponding to areas a and b.

[0050] More preferably, in order to improve the heat exchange efficiency between the cooling medium in the liquid cooling pipeline 400 and the battery module 300, a heat conductive structural adhesive is provided on the first plate 110 of the bottom plate 100 in this embodiment, and the heat conductive structural adhesive is located on the side of the first plate 110 close to the battery module 300. The provision of the heat conductive structural adhesive can, on the one hand, fix the battery module 300, and on the other hand, can also improve the heat transfer coefficient between the cooling medium and the battery module 300, thereby accelerating heat dissipation.

[0051] Continue to see Figure 2 , the battery pack in this embodiment includes a BMS component. The BMS component includes a main control board 700, a temperature collector and a pressure collector. The main control board 700 is connected to the temperature collector and the pressure collector in communication. The temperature collector is used to collect the temperature signal of the battery module 300, and the pressure collector is used to collect the pressure signal of the battery module 300. When the temperature signal and the pressure signal exceed their corresponding safety thresholds, the main control board 700 triggers the fire-fighting equipment to start, and the fire-fighting equipment sprays the fire-extinguishing agent into the installation space through the fire-fighting nozzle 600. In other words, in addition to the information detected by the all-in-one probe 500, the temperature signal and pressure signal of the battery module 300 detected by the temperature collector and the pressure collector in the BMS component can also be used as a condition to trigger the start of the fire-fighting equipment. Thereby increasing the sensitivity of the fire-fighting equipment to start, and responding more quickly, changing the traditional passive fire-fighting that extinguishes the fire only after the fire breaks out, to active fire-fighting that turns on the fire-fighting equipment when the risk of fire is detected before the fire breaks out, which is safer.

[0052] As an optional solution, in this embodiment, the main control board 700 can be arranged on the upper cover 200, and the temperature collector and the pressure collector are arranged on the battery module 300. Specifically, the upper cover 200 is provided with a first opening 210, and a first mounting plate 211 is provided at the first opening 210. The main control board 700 is detachably mounted on the first mounting plate 211 by screws or bolts, etc. The main control board 700 is located in the installation space, and the first mounting plate 211 can play a certain protective role on the main control board 700. Exemplarily, the first mounting plate 211 can be locked on the upper cover 200 by a plurality of first connecting members 212. Exemplarily, the first connecting member 212 can be a screw or a bolt, etc. And in order to ensure the sealing between the first mounting plate 211 and the upper cover 200, a first sealing gasket 213 is provided between the first mounting plate 211 and the upper cover 200.

[0053] Continue to see Figure 1 and Figure 6 In this embodiment, the upper cover 200 is further provided with a second opening 220, and the second opening 220 and the first opening 210 are arranged on the same side of the upper cover 200, and the first opening 210 and the second opening 220 are arranged adjacent to each other. A second mounting plate 221 is provided at the second opening 220, and a positive electrode plug-in 330, a negative electrode plug-in 340 and a maintenance switch 370 (i.e., MSD) are provided on the second mounting plate 221. Exemplarily, the positive electrode plug-in 330, the negative electrode plug-in 340 and the maintenance switch 370 can be installed on the second mounting plate 221 by screws or bolts. The second mounting plate 221 can be locked on the upper cover 200 by a plurality of second connecting members 222. Exemplarily, the second connecting member 222 can be a screw or a bolt. In order to ensure the sealing between the second mounting plate 221 and the upper cover 200, a second sealing gasket (not shown in the figure) is provided between the second mounting plate 221 and the upper cover 200. Furthermore, in order to improve the sealing performance of the battery pack, a third sealing gasket 170 may be provided between the upper cover 200 and the bottom plate 100 .

[0054] Optionally, the four battery modules 300 in this embodiment are connected in series. A protective cover 310 is provided on each battery module 300, and the protective cover 310 is located between the battery module 300 and the upper cover 200. Among them, the positive electrode plug-in 330 is connected to the positive electrode of the first battery module 300, the negative electrode plug-in 340 is connected to the negative electrode of the last battery module 300, and the maintenance switch 370 is arranged between two adjacent and series battery modules 300. Further, in order to ensure the circuit safety of the battery module 300, the battery pack also includes a fuse 800, one end of the fuse 800 is connected to the negative electrode of the last battery module 300, and the other end of the fuse 800 is connected to the negative electrode plug-in 340. That is, the fuse 800 is arranged between the last battery module 300 and the negative electrode plug-in 340.

[0055] Specifically, for the convenience of explaining this embodiment, the battery modules 300 corresponding to the four regions a, b, c, and d are respectively recorded as the first module, the second module, the third module, and the fourth module. That is, the first module is the battery module 300 close to the water inlet 111, the fourth module is the battery module 300 close to the water outlet 112, and the first module, the second module, the third module, and the fourth module are arranged in sequence and connected in series.

[0056] Exemplarily, the fourth module is taken as the first battery module 300, and the first module is taken as the last battery module 300 for explanation. The positive electrode of the fourth module is connected to the positive electrode plug-in 330 through the positive electrode-positive electrode plug-in connection copper bar 322. The negative electrode of the fourth module is connected to the positive electrode of the third module through the component connection copper bar 321. The negative electrode of the third module is connected to the maintenance switch 370 through the negative electrode-MSD connection copper bar 323. The positive electrode of the second module is connected to the maintenance switch 370 through the positive electrode-MSD connection copper bar 324. The negative electrode of the second module is connected to the positive electrode of the first module through the component connection copper bar 321, the negative electrode of the first module is connected to the fuse 800 through the negative electrode-fuse connection copper bar 325, and the fuse 800 is connected to the negative electrode plug-in 340 through the fuse-negative electrode plug-in connection copper bar 326. That is, the circuit connection method is: positive electrode plug-in 330, fourth module, component connection copper bus 321, third module, negative electrode-MSD connection copper bus 323, maintenance switch 370, positive electrode-MSD connection copper bus 324, second module, component connection copper bus 321, first module, negative electrode-fuse connection copper bus 325, fuse 800, fuse-negative electrode plug-in connection copper bus 326, negative electrode plug-in 340 are connected in sequence to form a loop. It should be noted that the maintenance switch 370 is connected in series between the third module and the second module. When the maintenance switch 370 is disconnected, the circuit connection is interrupted and the battery pack stops supplying power. And when assembling the battery pack, the maintenance switch 370 should be installed last after all other components are installed to avoid the circuit being connected during the assembly process to ensure safety.

[0057] Furthermore, the second mounting plate 221 is also provided with a first communication interface 350 and a second communication interface 360, the first communication interface 350 is arranged between the positive electrode plug-in 330 and the maintenance switch 370, and the second communication interface 360 ​​is arranged between the negative electrode plug-in 340 and the maintenance switch 370. The first communication interface 350, the main control board 700, the second communication interface 360 ​​and the fire fighting equipment can be connected through communication wires to form an electrical connection loop to achieve signal transmission, and the main control board 700 can control the fire fighting equipment to start.

[0058] Continue to see Figure 2In this embodiment, a sheet metal fixing part 150 is provided on the bottom plate 100, and the fuse 800 and the multi-in-one probe 500 are detachably arranged on the sheet metal fixing part 150. Optionally, in order to raise the position of the fuse 800 and the multi-in-one probe 500, a fixing foot 160 is provided on the bottom plate 100 in this embodiment, and the sheet metal fixing part 150 is fixed on the fixing foot 160 by bolts, screws, etc. Optionally, continue to refer to Figure 2 and Figure 6 The second mounting plate 221 is provided with a flange 223 on one side close to the bottom plate 100, and the flange 223 extends toward the direction where the battery module 300 is located. The flange 223 can also be supported by the fixing legs 160 to make the second mounting plate 221 more firmly and stably fixed. Of course, the flange 223 and the fixing legs 160 can also be connected by screws, bolts, etc.

[0059] See also Figure 1 and Figure 3 In this embodiment, the upper cover 200 is provided with an explosion-proof valve 900. When the pressure in the installation space exceeds the opening pressure of the explosion-proof valve 900, the explosion-proof valve 900 is opened. When the fire-fighting equipment cannot meet the fire-fighting requirements of the battery module 300, a large amount of gas inside the battery pack can be released through the setting of the explosion-proof valve 900, thereby avoiding excessive pressure in the installation space of the battery pack and preventing the risk of explosion. Optionally, in this embodiment, the explosion-proof valve 900 and the fire nozzle 600 are both arranged on the upper cover 200, and are arranged on the same side as the first mounting plate 211 and the second mounting plate 221, and the explosion-proof valve 900 and the fire nozzle 600 are arranged adjacent to each other up and down.

[0060] This embodiment also provides an energy storage system, including fire-fighting equipment and the above-mentioned battery pack, and the fire-fighting equipment is connected to the fire-fighting nozzle 600 of the battery pack. By adopting the above-mentioned battery pack design, on the one hand, the liquid cooling pipeline 400 integrated on the bottom plate 100 can evenly dissipate heat for multiple battery modules 300 to ensure the normal operation of the battery modules 300; on the other hand, the all-in-one probe 500 in this embodiment also makes the triggering of the fire-fighting equipment more sensitive, reduces the reaction time, and improves the safety of the energy storage system.

[0061] Exemplarily, the fire-fighting equipment can generate and output a fire-extinguishing agent. The fire-fighting equipment is connected to the fire-fighting nozzle 600 via a hose. The fire-extinguishing agent passes through the hose and is sprayed toward the battery module 300 in the battery pack through the fire-fighting nozzle 600.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A battery pack, characterized in that: include: A bottom plate (100) and an upper cover (200), wherein the bottom plate (100) and the upper cover (200) form a closed installation space; The battery modules (300) are provided in a number of at least two, wherein at least two of the battery modules (300) are both provided on the bottom plate (100), and the battery modules (300) are both located in the installation space; A liquid cooling pipeline (400) is integrated on the base plate (100), two ends of the liquid cooling pipeline (400) are respectively connected to a water inlet (111) and a water outlet (112) located on the base plate (100), a turbulent structure is provided at one end of the liquid cooling pipeline (400) close to the water outlet (112), a cooling medium flows in the liquid cooling pipeline (400), and the cooling medium exchanges heat with the battery module (300); An all-in-one probe (500) is arranged in the installation space and is in communication connection with the main control board (700), the all-in-one probe (500) is used to detect information about the temperature, pressure, hydrogen concentration, carbon monoxide concentration and flammable and harmful gas concentration in the installation space, and transmit the information to the main control board (700); A fire-fighting nozzle (600) is connected to the main control board (700) and the fire-fighting equipment. When any one of the temperature, the pressure, the hydrogen concentration, the carbon monoxide concentration or the flammable and harmful gas concentration exceeds its corresponding safety threshold, the main control board (700) triggers the fire-fighting equipment to start, and the fire-fighting equipment sprays a fire-extinguishing agent into the installation space through the fire-fighting nozzle (600).

2. The battery pack according to claim 1, characterized in that: The liquid cooling pipeline (400) is provided with at least four branches (410), the at least four branches (410) are arranged in parallel, and each battery module (300) corresponds to at least two branches (410); A connecting pipe (420) is provided on the branch (410) corresponding to the battery module (300) arranged near the water outlet (112), and the connecting pipe (420) connects two adjacent branches (410). The connecting pipe (420) is a flow-disturbing structure on the branch (410) arranged near the water outlet (112), and the flow-disturbing structure is located at one end of the branch (410) away from the water outlet (112).

3. The battery pack according to claim 1, characterized in that: The bottom plate (100) comprises a first plate (110) and a second plate (120), wherein the first plate (110) is located on a side close to the battery module (300), and the second plate (120) is located on a side away from the battery module (300), the water inlet (111) and the water outlet (112) are located on the same side of the first plate (110), and a protrusion is provided on the second plate (120), and the protrusion and the first plate (110) are arranged to form the liquid cooling pipeline (400).

4. The battery pack according to claim 1, characterized in that: The battery pack comprises a BMS component, the BMS component comprises a main control board (700), a temperature collector and a pressure collector, the main control board (700) is in communication connection with the temperature collector and the pressure collector, the temperature collector is used to collect a temperature signal of the battery module (300), and the pressure collector is used to collect a pressure signal of the battery module (300); when the temperature signal and the pressure signal exceed their corresponding safety thresholds, the main control board (700) triggers the fire-fighting equipment to start, and the fire-fighting equipment sprays a fire-extinguishing agent into the installation space through the fire-fighting nozzle (600); The upper cover (200) is provided with a first opening (210), a first mounting plate (211) is provided at the first opening (210), and the main control board (700) is arranged on the first mounting plate (211).

5. The battery pack according to claim 4, characterized in that: The upper cover (200) is provided with a second opening (220), a second mounting plate (221) is provided at the second opening (220), and a positive electrode plug-in (330), a negative electrode plug-in (340) and a maintenance switch (370) are provided on the second mounting plate (221); At least two of the battery modules (300) are connected in series, the positive electrode plug-in (330) is connected to the positive electrode of the first battery module (300), the negative electrode plug-in (340) is connected to the negative electrode of the last battery module (300), and the maintenance switch (370) is arranged between two adjacent battery modules (300) connected in series.

6. The battery pack according to claim 5, characterized in that: The second mounting plate (221) is also provided with a first communication interface (350) and a second communication interface (360), and the first communication interface (350), the main control board (700), and the second communication interface (360) are connected to the fire-fighting equipment to form an electrical connection loop.

7. The battery pack according to claim 5, characterized in that: The battery pack further comprises a fuse (800), one end of the fuse (800) is connected to the negative electrode of the last battery module (300), and the other end of the fuse (800) is connected to the negative electrode plug-in (340).

8. The battery pack according to claim 7, characterized in that: A sheet metal fixing part (150) is provided on the bottom plate (100), and the fuse (800) and the all-in-one probe (500) are detachably arranged on the sheet metal fixing part (150).

9. The battery pack according to any one of claims 1 to 8, characterized in that: The upper cover (200) is provided with an explosion-proof valve (900), and when the pressure in the installation space exceeds the opening pressure of the explosion-proof valve (900), the explosion-proof valve (900) is opened; the fire nozzle (600) is arranged on the upper cover (200) and is arranged adjacent to the explosion-proof valve (900).

10. An energy storage system, characterized in that: It comprises fire-fighting equipment and the battery pack according to claim 1, wherein the fire-fighting equipment is connected to the fire-fighting nozzle (600) of the battery pack.

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