Multi-module battery system and integrated power supply with same

Abstract

The invention discloses a multi-module battery system and an integrated power supply with the same, and relates to the technical field of battery systems. A battery rack; each battery module comprises a liquid cooling drawing frame, a battery cell group and a high-low voltage circuit board; the liquid cooling drawing frame slides in and out of a battery module mounting cavity in the battery frame in a drawing manner; the battery core is assembled in a liquid cooling chamber in the liquid cooling drawing frame; the high-low voltage circuit board is arranged at the top end of the battery cell group and electrically connected with the battery cell group; the cooling pipeline assembly is communicated with the liquid inlet and the liquid outlet of the liquid cooling drawing frame; the electrical control box is electrically connected with the high-low voltage circuit board of each battery module; a power plug electrically connected with the electric control box is arranged on the outer wall of the sealing cabinet; a plurality of BMS battery management devices; and the plurality of BMS battery management devices are detachably mounted on the battery rack and are electrically connected with the high-low voltage circuit boards of the plurality of battery modules in a one-to-one correspondence manner. The cabinet body is totally closed, an independent liquid cooling system is integrated for a single module in a narrow space, and efficient and uniform cooling and heat dissipation are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery systems, and in particular to a multi-module battery system and an integrated power supply having the same. Background Art

[0002] At present, the battery system has great demand potential in the new energy market of ships, with high safety requirements and large single-ship power consumption. However, the cost per unit of power is high, which greatly restricts the development of new energy in ships. With the development of the new energy market for ships, the demand for battery systems will be increasing. Under the strict control of the classification society for safety, how to reduce the cost of battery systems has become an urgent problem to be solved. Usually, in order to meet the battery pack replacement weight requirements of the classification society, many manufacturers make the battery pack within 130 kg. In order to meet the safety requirements of the classification society, a single battery pack needs to be equipped with a variety of safety devices and structural parts, resulting in high costs.

[0003] The existing solutions mainly use battery packs as basic units, as a complete whole. Usually, a single module forms a battery pack. The single battery pack has a small power, and complete battery pack components need to be supported, such as high and low voltage wire harnesses (63), BMS acquisition units, boxes, upper covers and other components. The battery pack components of the battery system are redundant. Thus, the energy density of the battery pack is low, and the cost of the battery pack is high. Under the weight limit requirements, the power of the battery pack cannot be made larger. There are also some solutions that use a micro-container with a drawer structure inside. The module is slidably connected to the layer rack to achieve the replacement and maintenance of the module level. This solution solves the problem of low integration efficiency of the battery pack to a certain extent. For the micro-container solution, the thermal management system uses air cooling, with low heat dissipation efficiency, poor temperature uniformity, small specific heat capacity of air, limited transfer capacity, and it is impossible to achieve complete sealing with fan air cooling, which is not suitable for use in complex environments such as ships; moreover, the micro-container is small in volume and can accommodate limited power, and is not suitable for ships with large power requirements.

[0004] Therefore, how to design a multi-module battery system and an integrated power supply having the same, which can achieve full enclosure of the cabinet, integrate an independent liquid cooling system for a single module in a narrow cabinet space, achieve efficient and uniform cooling and heat dissipation, and have the characteristics of stable structure, strong anti-sway ability and large electric energy storage is an urgent problem for those skilled in the art to solve. Summary of the Invention

[0005] In view of this, the present invention provides a multi-module battery system and an integrated power supply having the same, aiming to solve the technical problems of the traditional battery system with an unenclosed cabinet, poor heat dissipation effect and unstable structure.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a multi-module battery system, comprising:

[0008] A sealed cabinet, the front side of the sealed cabinet is open, and a sealed door is detachably and hermetically installed corresponding to the open part;

[0009] A battery rack, the battery rack is fixedly installed inside the sealed cabinet, and a plurality of layers of battery module installation cavities are sequentially arranged on the battery rack along the height direction;

[0010] A plurality of battery modules, the battery modules include a liquid-cooled drawer rack, a battery cell group and a high and low voltage circuit board; the liquid-cooled drawer rack can pass through the open part and slide in and out of the battery module installation cavity along the front and back directions of the sealed cabinet; a liquid-cooled chamber is provided inside the liquid-cooled drawer rack, the battery cell group is installed in the liquid-cooled chamber; the high and low voltage circuit board is arranged at the top of the battery cell group and is electrically connected to the battery cell group; a liquid inlet and a liquid outlet communicating with the internal cooling channel are provided on each liquid-cooled drawer rack;

[0011] A cooling pipeline assembly, the cooling pipeline assembly is arranged inside the battery rack and communicates with the liquid inlets and outlets of each liquid-cooled drawer rack to supply coolant; the liquid inlet end and the liquid return end of the cooling pipeline assembly both penetrate through the outer wall of the sealed cabinet and extend to the outside of the sealed cabinet;

[0012] An electrical control box, the electrical control box is arranged inside the sealed cabinet and is electrically connected to the high and low voltage circuit boards of each battery module; a power plug electrically connected to the electrical control box is installed on the outer wall of the sealed cabinet;

[0013] A plurality of BMS battery management devices; the outer casings of the plurality of BMS battery management devices are detachably installed on the battery rack and are electrically connected to the high and low voltage circuit boards of the plurality of battery modules one by one.

[0014] The sealed cabinet of a multi-module battery system according to the present invention ensures that the internally installed battery modules are not affected by the external complex environment and can be applied to different scenarios, especially suitable for new energy use on ships. The battery modules are installed on a battery rack, and the battery rack, as the main support structure for bearing the heavy pressure of multiple battery modules, is more stable and durable. Under the condition of multi-module installation, the structure and shape of the sealed cabinet are ensured to be stable, and thus good sealing performance is ensured. In addition, through the liquid cooling and heat dissipation technology method, the heat dissipation structure is extended to each independent battery module, realizing efficient heat dissipation under the condition of centrally installing multiple battery modules in the sealed cabinet, and thus ensuring the stable operation of the system. The liquid cooling and drawable rack of the present invention has multiple functions of bearing the battery cell group, facilitating the disassembly and replacement of the battery cell group by drawing, and efficiently cooling the battery cell group by constructing a liquid cooling chamber inside. The inlet end and the return end of the cooling pipeline assembly responsible for supplying liquid and exchanging heat to cool the liquid cooling and drawable rack are both arranged outside the sealed cabinet, used to connect external cold liquid supply equipment for circulating liquid supply, providing a larger space for the layout of multiple battery modules in the sealed cabinet. The high-voltage and low-voltage circuit board of the present invention functions as a CCS integrated busbar, used to integrate components such as the conductive busbar and control circuit (voltage and temperature acquisition) in the battery module into a module to achieve functions such as high-voltage series and parallel connection of battery cells, temperature acquisition, voltage acquisition, and overcurrent fusing; the BMS battery management device of the present invention is mainly used to manage and monitor various parameters of the battery module to ensure the safe, stable, and long-life operation of the battery cell group; the electrical control box of the present invention is used to convert and control the charging and discharging of the multi-module battery system.

[0015] As a further improvement of the above technical solution, the liquid cooling and drawable rack includes a liquid cooling plate, a front plate assembly, and a rear plate assembly; the front plate assembly and the rear plate assembly have opposite plate surfaces and are respectively and perpendicularly arranged at the front and rear of the upper plate surface of the liquid cooling plate; the area above the liquid cooling plate corresponding to the area between the front plate assembly and the rear plate assembly forms a liquid cooling chamber for installing the battery cell group; the battery cell group is located in the liquid cooling chamber and fixed on the liquid cooling plate;

[0016] A limiting slot structure is provided in the battery module installation cavity, and an inserting strip structure capable of being adaptively inserted into the limiting slot structure to position the liquid cooling and drawable rack is formed on the outer peripheral side of the liquid cooling plate;

[0017] A cooling channel is provided in the liquid cooling plate, and a liquid inlet and a liquid outlet communicating with its cooling channel are provided at the front of the liquid cooling plate; the cooling pipeline assembly is detachably connected and communicates with the liquid inlet and the liquid outlet of the liquid cooling plate to supply cooling liquid.

[0018] The beneficial effects of the above technical solution are as follows: The liquid cooling plate is the main load-bearing structure for carrying the battery cell group. At the same time, it cooperates with the limit slot structure in the battery module installation cavity to play a role in limiting the liquid cooling pull-out rack, improving the installation stability of the battery module on the battery rack. The liquid inlet and outlet are arranged at the front of the liquid cooling plate, facilitating the disassembly of the cooling pipeline assembly after opening the sealing door, and then pulling out the battery module; after the liquid cooling pull-out rack is inserted into the battery module installation cavity, the front end plate assembly corresponds to one side of the sealing door of the sealing cabinet, facilitating maintenance personnel to horizontally pull and extract the liquid cooling pull-out rack through the front end plate assembly.

[0019] As a further improvement of the above technical solution, there are two or more battery cell groups, and two or more battery cell groups are arranged in parallel along the width direction of the liquid cooling plate; the high-voltage and low-voltage circuit boards are arranged at the top of two or more battery cell groups and are electrically connected to two or more battery cell groups.

[0020] The beneficial effects of the above technical solution are as follows: By arranging two or more battery cell groups in a single battery module, the electric energy storage capacity of a single battery module of the battery system can be improved; and the high-voltage and low-voltage circuit boards can be connected in series and parallel and coordinately control two or more battery cell groups, improving the integration degree of the battery module.

[0021] As a further improvement of the above technical solution, it further includes a high-voltage connection row assembly; the high-voltage connection row assembly includes a plurality of high-voltage connection rows;

[0022] The high-voltage and low-voltage circuit boards between multiple battery modules and between the high-voltage and low-voltage circuit boards of multiple battery modules and the electrical control box are electrically connected through the high-voltage connection rows.

[0023] The beneficial effects of the above technical solution are as follows: The role of the high-voltage connection row is to connect the high-voltage and low-voltage circuit boards of multiple battery modules in series and parallel, and then connect their positive and negative poles to the electrical control box. By combining different numbers of battery modules, different standardized electric quantities can be designed to meet greater electric quantity requirements.

[0024] As a further improvement of the above technical solution, the high-voltage connection row is a shaped metal plate formed by bending a strip-shaped metal plate, and its outer wall is coated with an insulating layer.

[0025] The beneficial effects of the above technical solution are as follows: The high-voltage connection row is designed as a shaped metal plate, which improves the ability to withstand high voltage and conduct large current, and also facilitates system assembly and improves the disassembly and assembly efficiency of battery module maintenance and replacement.

[0026] As a further improvement of the above technical solution, the high-voltage connection row assembly further includes a plurality of high-voltage bases; each high-voltage base can be detachably connected to the front end plate assembly; a fastener for tightly connecting the connection end of the high-voltage connection row and the outgoing line end of the high-voltage and low-voltage circuit board is installed in the fixing hole on the front end face of the high-voltage base.

[0027] The beneficial effects of the above technical solution are as follows: The high-voltage base serves as an insulating connection base, providing an installation foundation for the electrical connection between the high-voltage connection row and the outlet end of the high-low voltage circuit board; the fixing holes of the high-voltage base are arranged on its front end face, and maintenance personnel can directly perform the operation of disassembling and installing fasteners on the front after opening the sealed door, making maintenance and repair more convenient and efficient.

[0028] As a further improvement of the above technical solution, multiple said BMS battery management devices are all arranged corresponding to the space between the sealed door and the corresponding battery module, and are all electrically connected to the corresponding high-low voltage circuit board through low-voltage wiring harnesses.

[0029] The beneficial effects of the above technical solution are as follows: The sampling wiring harness in the high-low voltage circuit collects information such as the voltage and temperature of the battery cells, and then transmits it to the BMS through the low-voltage wiring harness, so that the BMS can collect the information of the battery cells and perform real-time monitoring and management; the BMS battery management device is directly arranged in front of each corresponding battery module, which is convenient for disassembly and assembly and also reduces the length of the low-voltage wiring harness.

[0030] As a further improvement of the above technical solution, there are two or more groups of said battery racks, and two or more groups of said battery racks are arranged in parallel along the width direction of the sealed cabinet; the high-low voltage circuit boards of the battery modules on adjacent two groups of said battery racks are electrically connected.

[0031] The beneficial effects of the above technical solution are as follows: Two or more groups of battery racks are arranged in parallel along the width direction of the sealed cabinet, further increasing the capacity of the battery cell group of the system, and thus improving the power storage capacity of the system.

[0032] As a further improvement of the above technical solution, it further includes a fire pipeline assembly, and the fire pipeline assembly includes a fire main pipe and multiple fire branch pipes; the fire main pipe is arranged on the battery rack along the height direction of the battery rack and corresponds to the side of the battery module installation cavity; one end of the fire main pipe penetrates through the outer wall of the sealed cabinet and extends to the outside of the sealed cabinet; multiple said fire branch pipes are arranged corresponding to multiple said battery module installation cavities one by one, one ends of multiple said fire branch pipes are all connected and communicated with the fire main pipe, and the other ends extend into the corresponding battery module installation cavities.

[0033] The beneficial effects of the above technical solution are as follows: The fire main pipe is arranged along the battery rack, effectively utilizing the space of the battery rack. One fire branch pipe is arranged in each battery module installation cavity. When a battery module has a thermal runaway, it can directly and effectively perform fire spraying on the battery module, realizing direct fire extinguishing of the battery cells, with higher fire extinguishing efficiency and better safety. The fire pipeline assembly can be assembled before the module assembly.

[0034] On the other hand, the present invention provides an integrated power supply, which includes a plurality of the multi-module battery systems and a container; a plurality of battery systems are arranged horizontally and side by side in the container.

[0035] The battery system of the present invention can be used as a standard unit and can meet the requirements of different power by being combined according to actual needs. That is, a high-power integrated power supply can be formed by arranging the sealed cabinets of multiple battery systems side by side in a container.

[0036] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a multi-module battery system and an integrated power supply having the same, which have the following advantages and beneficial effects:

[0037] 1. The present invention uses a plurality of battery modules as basic units to integrate a battery system with independent large power, and realizes maintenance and replacement at the module level.

[0038] 2. The battery module of the present invention is integrated with a liquid cooling plate, and a single battery module integrates an independent liquid cooling system, so that the system cooling is more efficient and uniform.

[0039] 3. In the battery cabinet composed of the sealed cabinet and the battery rack of the present invention, the fire-fighting pipelines reach directly above the battery modules point to point, realizing direct jet fire extinguishing for the battery cores.

[0040] 4. The present invention realizes the limit and guiding assembly of the battery module through the cooperation of the limit slot structure and the insert bar structure, and can realize the rapid assembly and disassembly of the module.

[0041] 5. The high-voltage connection between the battery modules in the battery cabinet of the present invention is made of a high-voltage connection row formed by bending and shaping a metal plate. The high-voltage connection row can be a copper row or an aluminum row, which greatly reduces the cost.

[0042] 6. The connection row mounting surface of the high-voltage base of the battery module of the present invention is perpendicular to the operator, which is convenient for installation and disassembly.

[0043] 7. The battery cabinet constructed by the sealed cabinet and the battery rack of the present invention has a fully sealed design, meets the protection requirements of IPX7, and can be applied to different scenarios.

[0044] 8. The battery cabinet of the battery system of the present invention can be designed standardly. By connecting the battery cabinets in series and parallel, battery systems with different power and voltage requirements can be formed. Description of the Drawings

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0046] Figure 1 Schematic three-dimensional view of the sealed cabinet of a multi-module battery system of the present invention;

[0047] Figure 2 Exploded view of the overall structure of a multi-module battery system of the present invention;

[0048] Figure 3 Schematic view of the assembled state of the high-voltage connection row assembly, cooling pipeline assembly and fire pipeline assembly of a multi-module battery system of the present invention;

[0049] Figure 4 Schematic view of the layout state of the main fire pipeline and branch fire pipelines of a multi-module battery system of the present invention;

[0050] Figure 5 Schematic view of the state where the branch fire pipeline of a multi-module battery system of the present invention extends to the top of the battery module installation cavity in the battery rack;

[0051] Figure 6 Schematic view of the structure of the BMS battery management device of a multi-module battery system of the present invention;

[0052] Figure 7 Exploded view of the structure of the battery module of a multi-module battery system of the present invention;

[0053] Figure 8 Schematic view of the structure of the battery module of a multi-module battery system of the present invention;

[0054] Figure 9 Schematic view of the front end face of the battery module of a multi-module battery system of the present invention;

[0055] Figure 10 Schematic view of the structure of the high-voltage base of a multi-module battery system of the present invention;

[0056] Figure 11 Schematic view of the structure of the sealed door of a multi-module battery system of the present invention;

[0057] Figure 12 Schematic view of the structure of the limit slot of a multi-module battery system of the present invention;

[0058] Figure 13 Schematic view of the installation of the battery module of a multi-module battery system of the present invention;

[0059] Figure 14 Schematic diagram of the installation states of the front, side, and rear parts of the battery modules of a multi-module battery system according to the present invention;

[0060] Figure 15 Schematic diagram of the connection state between the high-voltage base and the high-voltage connection row of a multi-module battery system according to the present invention;

[0061] Figure 16 Schematic diagram of the structure of the cabinet door sealing ring of a multi-module battery system according to the present invention.

[0062] Figure 17 Top view of the overall structure of an integrated power supply according to the present invention;

[0063] In the figure: 1, sealed cabinet; 11, open end; 12, sealed door; 121, cabinet door sealing ring; 122, sealing bolt; 123, water nozzle installation port; 124, fire pipe installation port; 125, power plug installation port; 2, battery rack; 21, battery module installation cavity; 211, limit slot structure; 3, battery module; 31, liquid cooling pull-out rack; 311, liquid cooling plate; 3111, insertion strip structure; 3112, liquid inlet; 3113, liquid outlet; 312, front end plate assembly; 3121, front end plate; 3122, front module fixing plate; 3123, module connecting piece; 3124, module handle; 3125, positioning bolt; 313, rear end plate assembly; 3131, rear end plate; 3132, rear module fixing plate; 3133, limit strip; 314, liquid cooling chamber; 32, battery cell group; 33, high and low voltage circuit board; 331, wire outlet end; 4, cooling pipeline assembly; 41, liquid inlet end; 42, liquid return end; 5, electrical control box; 51, power plug; 6, BMS battery management device; 61, BMS bracket; 611, bracket installation hole; 62, BMS; 63, low voltage wire harness; 7, high voltage connection row assembly; 71, high voltage connection row; 72, high voltage base; 721, fixing hole; 722, fastener; 8, fire pipeline assembly; 81, fire main pipe; 811, fire nozzle; 82, fire branch pipe; 9, container. Detailed implementation manners

[0064] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0066] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0067] In the present invention, unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] According to an embodiment of the present invention, as Figures 1 to 16 shown, a multi-module battery system includes: a sealed cabinet 1, a battery rack 2, a plurality of battery modules 3, a cooling pipeline assembly 4, an electrical control box 5, and a plurality of BMS battery management devices 6.

[0069] The front side of the sealed cabinet 1 is an open mouth 11, and a sealed door 12 is detachably and sealingly installed corresponding to the open mouth 11.

[0070] The battery rack 2 is fixedly installed inside the sealed cabinet 1, and a plurality of battery module installation cavities 21 are sequentially provided on the battery rack 2 along the height direction.

[0071] The battery module 3 includes a liquid-cooled drawable rack 31, a battery cell group 32, and a high and low voltage circuit board 33; the liquid-cooled drawable rack 31 can pass through the open mouth 11 and be drawn in and out of the battery module installation cavity 21 along the front and rear direction of the sealed cabinet 1; a liquid-cooled chamber 314 is provided inside the liquid-cooled drawable rack 31, and the battery cell group 32 is installed in the liquid-cooled chamber 314; the high and low voltage circuit board 33 is arranged at the top of the battery cell group 32 and is electrically connected to the battery cell group 32; an inlet 3112 and an outlet 3113 for communicating with the internal cooling channels are provided on each liquid-cooled drawable rack 31.

[0072] The cooling pipeline assembly 4 is arranged inside the battery rack 2 and communicates with the liquid inlet 3112 and the liquid outlet 3113 of each liquid-cooled drawer rack 31 to supply the coolant; both the liquid inlet end 41 and the liquid return end 42 of the cooling pipeline assembly 4 penetrate through the outer wall of the sealed cabinet 1 and extend to the outside of the sealed cabinet 1.

[0073] The electrical control box 5 is arranged inside the sealed cabinet 1 and is electrically connected to the high- and low-voltage circuit boards 33 of each battery module 3; a power plug 51 electrically connected to the electrical control box 5 is installed on the outer wall of the sealed cabinet 1.

[0074] The housings of multiple BMS battery management devices 6 are detachably installed on the battery rack 2 and are electrically connected to the high- and low-voltage circuit boards 33 of multiple battery modules 3 one by one.

[0075] The sealed cabinet 1 of a multi-module battery system in this embodiment ensures that the internally installed battery modules 3 are not affected by the external complex environment, can be applicable to different scenarios, especially applicable to new energy use on ships. The battery modules 3 are installed on the battery rack 2. The battery rack 2, as the main support structure for bearing the heavy pressure of multiple battery modules 3, is more stable and durable. Under the condition of multi-module installation, the structure and shape of the sealed cabinet 1 are ensured to be stable, and thus a good sealing performance is ensured. In addition, through the liquid-cooling heat dissipation technology method, the heat dissipation structure is extended to each independent battery module 3, so that the battery module 3 alone becomes an independent unit with an independent liquid-cooling system and can be directly assembled with the battery rack 2, realizing efficient heat dissipation under the condition of centrally installing multiple battery modules 3 in the sealed cabinet body, and thus ensuring the stable operation of the battery system. The liquid-cooled drawer rack 31 of the present invention has multiple functions of bearing the battery cell group 32, facilitating the extraction, disassembly and replacement of the battery cell group 32, and efficiently cooling the battery cell group 32 by constructing a liquid-cooling chamber 314 inside. The liquid inlet end 41 and the liquid return end 42 of the cooling pipeline assembly 4 responsible for supplying liquid, heat exchange and cooling to the liquid-cooled drawer rack 31 are both arranged outside the sealed cabinet 1, and are used to connect external cold liquid supply equipment for circulating liquid supply, providing a larger space for the layout of multiple battery modules 3 in the sealed cabinet 1. The high- and low-voltage circuit board 33 of the present invention functions as a CCS integrated busbar, and is used to integrate components such as the conductive busbar, control circuit voltage, and temperature acquisition in the battery module 3 into a module to realize functions such as high-voltage series and parallel connection of battery cells, temperature acquisition, voltage acquisition, and overcurrent fusing; the BMS battery management device 6 of the present invention is mainly used to manage and monitor various parameters of the battery module 3 to ensure the safe, stable and long-life operation of the battery cell group 32; the electrical control box 5 of the present invention is used to convert and control the charging and discharging of the multi-module battery system.

[0076] Specifically, a cabinet door sealing ring 121 is provided between the sealing door 12 and the sealing cabinet 1. The sealing door 12 is fastened to the front side of the sealing cabinet 1 through sealing bolts 122 to seal the open end 11. The sealing cabinet 1 is fixedly welded to the battery rack 2. The sealing cooperation between the sealing door 12 and the sealing cabinet 1 of the battery system reaches the protection level of IPX7, and their materials are all made of steel, meeting the requirements of the standard materials.

[0077] In some embodiments, the liquid-cooled drawable rack 31 includes a liquid-cooled plate 311, a front end plate assembly 312, and a rear end plate assembly 313; the front end plate assembly 312 and the rear end plate assembly 313 have opposite plate surfaces and are vertically arranged on the front and rear parts of the upper plate surface of the liquid-cooled plate 311 in a one-to-one correspondence; the area between the front end plate assembly 312 and the rear end plate assembly 313 corresponding above the liquid-cooled plate 311 constitutes a liquid-cooled chamber 314 for installing the battery cell group 32; the battery cell group 32 is located in the liquid-cooled chamber 314 and fixed on the liquid-cooled plate 311.

[0078] A limiting slot structure 211 is provided in the battery module installation cavity 21, and an insertion bar structure 3111 capable of being adaptively inserted into the limiting slot structure 211 to position the liquid-cooled drawable rack 31 is formed on the outer peripheral side of the liquid-cooled plate 311.

[0079] A cooling channel is provided in the liquid-cooled plate 311, and a liquid inlet 3112 and a liquid outlet 3113 communicating with its cooling channel are provided at the front part of the liquid-cooled plate 311; the cooling pipeline assembly 4 is detachably connected and communicates with the liquid inlet 3112 and the liquid outlet 3113 of the liquid-cooled plate 311 to supply the coolant.

[0080] The liquid-cooled plate 311 is the main load-bearing structure for carrying the battery cell group 32, and at the same time, it cooperates with the limiting slot structure 211 in the battery module installation cavity 21 to play a role in limiting the liquid-cooled drawable rack 31, improving the installation stability of the battery module 3 on the battery rack 2. The liquid inlet 3112 and the liquid outlet 3113 are arranged at the front part of the liquid-cooled plate 311, which is convenient for disassembling the cooling pipeline assembly 4 after opening the sealing door 12, and then pulling out the battery module 3; after the liquid-cooled drawable rack 31 is inserted into the battery module installation cavity 21, the front end plate assembly 312 corresponds to the side of the sealing door 12 of the sealing cabinet 1, which is convenient for maintenance personnel to horizontally pull and draw out the liquid-cooled drawable rack 31 through the front end plate assembly 312.

[0081] In some embodiments, the liquid-cooled drawer rack 31 further includes two liquid-cooled side plates; the two liquid-cooled side plates are arranged along the length direction of the liquid-cooled plate 311 and correspond to the upper side of the liquid-cooled plate 311; the two liquid-cooled side plates are vertically fixed to both sides of the liquid-cooled plate 311 in the width direction in a one-to-one correspondence; the cooling channels inside the two liquid-cooled side plates are both communicated with the cooling channel inside the liquid-cooled plate 311. The upper plate surface of the liquid-cooled plate 311, the opposite plate surfaces of the two liquid-cooled side plates, and the opposite plate surfaces of the front end plate assembly 312 and the rear end plate assembly 313 jointly enclose and define a liquid-cooled chamber 314. The two liquid-cooled side plates and the liquid-cooled plate 311 form an independent liquid-cooling structure for three-dimensional heat dissipation of the battery cell group 32, strengthening the heat dissipation effect, and can meet the highly integrated structural layout of multiple battery modules 3 in the sealed cabinet 1 to meet the requirements of large power and complex environment usage scenarios.

[0082] In some embodiments, there are two or more battery cell groups 32, and the two or more battery cell groups 32 are arranged in parallel along the width direction of the liquid-cooled plate 311; the high- and low-voltage circuit boards 33 are arranged at the tops of the two or more battery cell groups 32 and electrically connected to the two or more battery cell groups 32.

[0083] By arranging two or more battery cell groups 32 in a single battery module 3, the electric energy storage capacity of a single battery module 3 of the battery system can be improved; and the high- and low-voltage circuit boards 33 can be connected in series and parallel and coordinately control the two or more battery cell groups 32, improving the integration degree of the battery module 3.

[0084] Specifically, there are two battery cell groups 32, and each battery cell group 32 includes a plurality of battery cells arranged in parallel in sequence. The front end plate assembly 312 includes two front end plates 3121, a module front fixing plate 3122, and a module connecting piece 3123; the rear end plate assembly 313 includes two rear end plates 3131 and a module tail fixing plate 3132;

[0085] The front end and the rear end of each battery cell group 32 are respectively arranged with a front end plate 3121 and a rear end plate 3131 in a one-to-one correspondence; the bottoms of the front end plates 3121 at the front ends of the two battery cell groups 32 are fixedly connected together through the module front fixing plate 3122; the tops of the front end plates 3121 at the front ends of the two battery cell groups 32 are fixedly connected together through the module connecting piece 3123; the rear sides of the rear end plates 3131 at the rear ends of the two battery cell groups 32 are fixedly connected together through the module tail fixing plate 3132. The front end plates 3121 and the rear end plates 3131 of each battery cell group 32 are fastened by tightening straps to clamp the corresponding battery cell group 32 in the middle. The liquid-cooled plate 311 is fixed at the bottom ends of the two battery cell groups 32 for heat transfer and dissipation.

[0086] Specifically, the upper plate surface of the liquid-cooled plate 311 and the bottom surface of the battery cell group 32 are fixedly bonded through structural adhesive or thermally conductive structural adhesive to improve the heat conduction efficiency.

[0087] Specifically, the liquid-cooled draw-out rack 31 further includes an intermediate liquid-cooled plate; the intermediate liquid-cooled plate is arranged between two groups of battery cell groups 32; the intermediate liquid-cooled plate is parallel and opposite to the two liquid-cooled side plates; the cooling channels inside the intermediate liquid-cooled plate are communicated with the cooling channels inside the liquid-cooled plate 311. The liquid-cooled plate 311, two front end plates 3121, two rear end plates 3131, two liquid-cooled side plates, and the intermediate liquid-cooled plate jointly enclose and form two liquid-cooled chambers 314 arranged side by side to adapt to the installation of two groups of battery cell groups 32, forming a liquid-cooled structure with three-dimensional heat dissipation.

[0088] In some embodiments, on opposite side walls and the rear wall of the battery module installation cavity 21, there are correspondingly provided limiting slot structures 211 along the horizontal direction; both side ends in the width direction of the liquid-cooled plate 311 extend to the outside of the two groups of battery cell groups 32 in the width direction to form inserting strip structures 3111; the module rear fixing plate 3132 is fixed at the bottom on the rear side of the rear end plate 3131, and at the position corresponding to the inserting strip structure 3111 on the rear side of the module rear fixing plate 3132, there is a limiting strip plate 3133. When the battery module 3 is installed, the two inserting strip structures 3111 in the width direction of the liquid-cooled plate 311 are horizontally aligned and slidably inserted into the two limiting slot structures 211 on the opposite side walls of the battery module installation cavity 21 one by one in an adapted manner, and the limiting strip plate 3133 at the rear part of the battery module 3 is snap-fitted into the limiting slot structure 211 on the rear side wall of the battery module installation cavity 21, realizing the accurate positioning of the battery module 3; positioning holes are provided on the module front fixing plate 3122, and the module front fixing plate 3122 is fastened to the battery rack 2 by passing positioning bolts 3125 through the positioning holes, realizing the stable installation of the battery module 3; even if the battery rack 2 shakes, it will not affect the positioning stability of the battery module 3.

[0089] In some embodiments, it further includes a high-voltage connection row assembly 7; the high-voltage connection row assembly 7 includes a plurality of high-voltage connection rows 71.

[0090] Between the high- and low-voltage circuit boards 33 of multiple battery modules 3 and between the high- and low-voltage circuit boards 33 of multiple battery modules 3 and the electrical control box 5, they are all electrically connected through the high-voltage connection rows 71.

[0091] The function of the high-voltage connection row 71 is to connect the high- and low-voltage circuit boards 33 of multiple battery modules 3 in series and parallel, and then connect its positive and negative poles to the electrical control box 5. By combining different numbers of battery modules 3, different standardized battery capacities can be designed to meet greater battery capacity requirements.

[0092] In some embodiments, the high-voltage connection row 71 is a shaped metal plate formed by bending a strip-shaped metal plate, and its outer wall is coated with an insulating layer.

[0093] The high-voltage connection row 71 is designed as a shaped metal plate, which improves the ability to withstand high voltage and conduct large current, and also facilitates system assembly and improves the disassembly and assembly efficiency of maintenance and replacement of the battery module 3.

[0094] In some embodiments, the high-voltage connection row assembly 7 further includes a plurality of high-voltage bases 72; each front panel assembly 312 is detachably connected with a high-voltage base 72; in the fixing holes 721 on the front end face of the high-voltage base 72, there is installed a fastener 722 for tightly connecting the connection end of the high-voltage connection row 71 with the outgoing line end of the high- and low-voltage circuit board 33.

[0095] The high-voltage base 72 functions as an insulating connection base, providing an installation foundation for the electrical connection between the high-voltage connection row 71 and the outgoing line end of the high- and low-voltage circuit board 33; the fixing holes 721 of the high-voltage base 72 are arranged on its front end face, and maintenance personnel can directly perform the operation of disassembling and installing the fastener 722 on the front side after opening the sealing door 12, making maintenance and repair more convenient and efficient.

[0096] Specifically, the fastener 722 is a bolt.

[0097] Specifically, each top end of the front panel 3121 is provided with a jack, and the bottom end of the high-voltage base 72 is provided with an insertion block 723. The insertion block 723 at the bottom end of the high-voltage base 72 can be adaptively snap-connected into the jack of the front panel 3121 to detachably connect the high-voltage base 72 with the front panel 3121 in the vertical direction conveniently. The high- and low-voltage circuit board 33 has an outgoing line end corresponding to each high-voltage base 72 on the front panel 3121; the outgoing line end 331 of the high- and low-voltage circuit board 33 is connected to the connection end of the high-voltage connection row 71 and both are fastened to the front end face of the high-voltage base 72 through the fastener 722.

[0098] Specifically, a module handle 3124 is fixedly installed on the front side of each front panel 3121.

[0099] In some embodiments, a plurality of BMS battery management devices 6 are all arranged corresponding to the sealing door 12 and between the corresponding battery modules 3, and are all electrically connected to the corresponding high- and low-voltage circuit boards 33 through low-voltage wire harnesses 63.

[0100] The sampling wire harness in the high- and low-voltage circuit collects information such as the voltage and temperature of the battery cells, and then transmits it to the BMS through the low-voltage wire harness 63. In this way, the BMS can collect the battery cell information and perform real-time monitoring and management; the BMS battery management device 6 is directly arranged in front of each corresponding battery module 3, which is convenient for disassembly and installation and also reduces the length of the low-voltage wire harness 63.

[0101] Specifically, the BMS battery management device 6 includes a BMS bracket 61 and a BMS 62; the BMS 62 is fixed on the BMS bracket 61, the BMS 62 is connected to one end of the low-voltage wire harness 63, and the other end of the low-voltage wire harness 63 is plugged into the front part of the corresponding high- and low-voltage circuit board 33; the BMS bracket 61 is fixed to the front part of the battery rack 2 through screws and the bracket mounting holes 611 and corresponds to the entrance and exit of the battery module installation cavity 21.

[0102] In some embodiments, there are two or more groups of battery racks 2, and the two or more groups of battery racks 2 are arranged side by side along the width direction of the sealed cabinet 1; the high-voltage and low-voltage circuit boards 33 of the battery modules 3 on two adjacent groups of battery racks 2 are electrically connected.

[0103] Arranging two or more groups of battery racks 2 side by side along the width direction of the sealed cabinet 1 further increases the capacity of the battery cell group of the system, thereby improving the power storage capacity of the system.

[0104] Specifically, the electrical control box 5 is fixedly installed at the top of one of the groups of battery racks 2.

[0105] In some embodiments, a fire pipeline assembly 8 is further included. The fire pipeline assembly 8 includes a main fire pipeline 81 and multiple fire branch pipelines 82; the main fire pipeline 81 is arranged on the battery rack 2 along the height direction of the battery rack 2 and corresponds to the side of the battery module installation cavity 21; one end of the main fire pipeline 81 penetrates through the outer wall of the sealed cabinet 1 and extends to the outside of the sealed cabinet 1; the multiple fire branch pipelines 82 are arranged corresponding to the multiple battery module installation cavities 21 one by one, one ends of the multiple fire branch pipelines 82 are all connected and communicated with the main fire pipeline 81, and the other ends extend into the corresponding battery module installation cavities 21.

[0106] The main fire pipeline 81 is arranged along the battery rack 2, effectively utilizing the space of the battery rack. A fire branch pipeline 82 is arranged in each battery module installation cavity 21. When a thermal runaway occurs in the battery module, the battery module can be directly and effectively fire-sprayed, realizing direct fire extinguishing of the battery cells, with higher fire extinguishing efficiency and better safety. The fire pipeline assembly 8 can be assembled before the module assembly. The fire pipeline assembly 8 of this embodiment provides sufficient space for the installation and arrangement of the battery modules inside the system by connecting external fire-fighting equipment to provide fire extinguishing agents for the battery system.

[0107] Specifically, there are two groups of battery racks 2, and the two groups of battery racks 2 are fixedly connected by welding or integrally connected; a gap is reserved between the two groups of battery racks 2, and the main fire pipeline 81 is arranged in the gap reserved between the two groups of battery racks 2; a fire branch pipeline 82 is connected to the main fire pipeline 81 corresponding to each layer of the battery module installation cavity 21; the spraying end of the fire branch pipeline 82 extends to the inner top of the battery module installation cavity 21 to correspondingly spray fire extinguishing towards the top of the battery module 3 inserted in the battery module installation cavity 21.

[0108] Specifically, a connector is installed at both the liquid inlet 3112 and the liquid outlet 3113 of each liquid cooling plate 311; the cooling pipeline assembly 4 includes multiple connecting pipes that can be detachably connected and communicated with the connectors of the liquid cooling plates 311.

[0109] In some embodiments, the connectors at the liquid inlet 3112 and the liquid outlet 3113 of each liquid-cooled drawer rack 31 are connected in series and parallel through connecting pipes. The liquid inlet end 41 and the liquid return end 42 of the cooling pipeline assembly 4 penetrate through the outer wall of the sealing door 12 of the sealed cabinet 1 and extend to the outside of the sealing door 12. Cooling water nozzles for connecting external cold liquid circulation supply equipment are installed at both the liquid inlet end 41 and the liquid return end 42 of the cooling pipeline assembly 4. The power plug 51 is installed on the outer side wall of the sealing door 12. One end of the fire main pipe 81 penetrates through the outer wall of the sealing door 12 of the sealed cabinet 1 and extends to the outside of the sealing door 12, and a fire nozzle 811 for connecting fire-fighting equipment is installed at one end of the fire main pipe 81. The fire nozzle 811, the cooling water nozzle, and the power plug 51 are all arranged on the outside of the sealing door 12, which is convenient for the combined layout of the sealed cabinet 1 of the battery system.

[0110] Specifically, when assembling the modules, first align the insertion strip structure 3111 on the side of the battery module 3 with the limit slot structure 211 on the inner side of the battery module installation cavity 21 of the battery rack 2. The limit slot structure 211 guides the insertion strip structure 3111, and push the entire battery module 3 to the end. When the limit strip 3133 of the battery module 3 is properly inserted into the limit slot structure 211 on the rear side wall of the battery module installation cavity 21, the module assembly is in place; then fasten the front module fixing plate 3122 to the battery rack 2 through the positioning bolt 3125, thereby fixing the battery module 3. After the module is fixed, use bolts to fix the high-voltage connection row 71 to the corresponding high-voltage base 72, and the fastener 722 for fixing the high-voltage connection row 71 faces the operator for easy operation. Then fix the connectors at the liquid inlet 3112 and the liquid outlet 3113 of the cooling pipeline assembly 4 to the liquid-cooled plate 311. Next is to assemble the BMS bracket 61 and the BMS 62, connect the low-voltage wiring harness 63, etc. After the internal assembly of the battery cabinet is completed, the installation of the sealing door 12 can be carried out. Align the cabinet door sealing ring 121 and stick it on the sealing surface of the sealing door 12, and then align and insert the cooling water nozzle, the fire nozzle 811, and the power plug 51 into the water nozzle installation opening 123, the fire pipe installation opening 124, and the power plug installation opening 125 opened on the sealing door 12 respectively, and fix them with bolts and seal. When repairing or replacing the module of the battery system, in the reverse order of the assembly, first remove the bolts of the sealing door 12, then remove the sealing door 12, then unplug the low-voltage wiring harness 63 of the BMS 62, then remove the BMS bracket 61 and the BMS 62, then disconnect and remove the corresponding high-voltage connection row 71, unplug the connecting pipe connecting the battery module 3 at the corresponding position, and then loosen the fixing bolts of the front module fixing plate 3122 at the front of the corresponding battery module 3, and pull out the entire battery module 3 through the module handle 3124. After replacing the new battery module 3, install it according to the installation steps.

[0111] Specifically, according to the requirements of a specific ship project, the sealed cabinets 1 of one or more battery systems can be directly assembled in the battery compartment or on the deck to fixedly install the battery system.

[0112] As Figure 17 shown, another embodiment of the present invention provides an integrated power supply, which includes a plurality of multi-module battery systems and a container 9; a plurality of battery systems are arranged horizontally and in parallel in the container 9.

[0113] The battery system of the present invention can be used as a standard unit and combined as required to meet the demand for different power. That is, the sealed cabinets of multiple battery systems can be combined side by side in a container to form an integrated power supply with high power.

[0114] The battery cabinet with an independent battery system can be used as a standard unit and combined according to actual conditions to meet the demand for different power. For example, multiple battery cabinets can be combined to form an integrated power supply with high power.

[0115] Specifically, two rows of battery systems are arranged horizontally and in parallel along the width direction of the container 9; each row of battery systems includes a plurality of battery systems; the multiple battery systems in each row are arranged in sequence along the length direction of the container 9; the sealed doors 12 of the sealed cabinets 1 of each battery system are arranged corresponding to the corresponding side doors of the container 9; this facilitates the series and parallel combination of multiple battery systems to form an integrated power supply.

[0116] Compared with the single-module battery pack, the present invention reduces the problem of redundant parts in the battery pack. While increasing the power of the entire battery system, it simplifies the types of parts, reduces the design cost; uses multiple modules as basic units to integrate an independent high-power battery system, improves the energy density of the battery system, and realizes maintenance and replacement at the module level. Through standardized design, the size of the module-integrated battery system is standardized, which can adapt to different application scenarios and form the required system power through the superposition of quantities. Through the integrated design of the module-integrated liquid cooling plate, the battery system is liquid-cooled, with high heat dissipation efficiency and precise temperature control, and can adapt to complex environments. The battery system can meet the protection level of IPX7 and can adapt to different application scenarios, such as being placed on the deck. The highly integrated system, through maintenance and replacement at the module level, meets the specified usage requirements. Through the combination of different numbers of modules, different standardized powers can be designed, and through series combination, greater power requirements can be met. Fire protection is realized inside the battery cabinet, and the fire protection points are aligned with the modules point by point to directly carry out fire protection on the battery cells. Through the method of limiting and bolt fixation, the rapid fixation and replacement of the modules are realized. The entire battery system is in the shape of a standard rectangular cabinet, with external interfaces such as a power plug 51, a cooling water nozzle, and a fire protection nozzle 811, which can realize the external connection of the battery system and the connection between multiple battery systems.

[0117] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0118] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A multi-module battery system, characterized in that, Including: A sealed cabinet (1), the front side of the sealed cabinet (1) is an opening (11), and a sealed door (12) is detachably and sealingly installed corresponding to the opening (11); A battery rack (2), the battery rack (2) is fixedly installed inside the sealed cabinet (1), and a plurality of battery module installation cavities (21) are sequentially arranged on the battery rack (2) along the height direction; A plurality of battery modules (3), the battery module (3) includes a liquid-cooled draw-out rack (31), a battery cell group (32) and a high and low voltage circuit board (33); the liquid-cooled draw-out rack (31) can pass through the opening (11) and slide in and out of the battery module installation cavity (21) along the front and rear directions of the sealed cabinet (1); a liquid-cooled chamber (314) is arranged inside the liquid-cooled draw-out rack (31), and the battery cell group (32) is installed in the liquid-cooled chamber (314); the high and low voltage circuit board (33) is arranged at the top of the battery cell group (32) and is electrically connected to the battery cell group (32); a liquid inlet (3112) and a liquid outlet (3113) communicating with the internal cooling channels are arranged on each liquid-cooled draw-out rack (31); A cooling pipeline assembly (4), the cooling pipeline assembly (4) is arranged inside the battery rack (2) and communicates with the liquid inlets (3112) and liquid outlets (3113) of each liquid-cooled draw-out rack (31) to supply coolant; the liquid inlet end (41) and the liquid return end (42) of the cooling pipeline assembly (4) both penetrate through the outer wall of the sealed cabinet (1) and extend to the outside of the sealed cabinet (1); An electrical control box (5), the electrical control box (5) is arranged inside the sealed cabinet (1) and is electrically connected to the high and low voltage circuit boards (33) of each battery module (3); a power plug (51) electrically connected to the electrical control box (5) is installed on the outer wall of the sealed cabinet (1); A plurality of BMS battery management devices (6); the outer casings of the plurality of BMS battery management devices (6) are detachably installed on the battery rack (2) and are electrically connected to the high and low voltage circuit boards (33) of the plurality of battery modules (3) one by one.

2. The multi-module battery system according to claim 1, wherein The liquid-cooled draw-out rack (31) includes a liquid-cooled plate (311), a front end plate assembly (312) and a rear end plate assembly (313); the front end plate assembly (312) and the rear end plate assembly (313) have opposite plate surfaces and are respectively and vertically arranged at the front and rear parts of the upper plate surface of the liquid-cooled plate (311); a liquid-cooled chamber (314) for installing the battery cell group (32) is formed in the area between the front end plate assembly (312) and the rear end plate assembly (313) corresponding to the upper part of the liquid-cooled plate (311); the battery cell group (32) is located in the liquid-cooled chamber (314) and is fixed on the liquid-cooled plate (311); A limit slot structure (211) is arranged inside the battery module installation cavity (21), and an insertion bar structure (3111) capable of being adaptively inserted into the limit slot structure (211) to position the liquid-cooled draw-out rack (31) is formed on the outer peripheral side of the liquid-cooled plate (311); The liquid cooling plate (311) is provided with a cooling channel, and a liquid inlet (3112) and a liquid outlet (3113) communicating with the cooling channel are arranged at the front part of the liquid cooling plate (311); the cooling pipeline assembly (4) is detachably connected and communicates with the liquid inlet (3112) and the liquid outlet (3113) of the liquid cooling plate (311) to supply coolant.

3. The multi-module battery system according to claim 2, wherein There are two or more groups of the battery cell groups (32), and two or more groups of the battery cell groups (32) are arranged in parallel along the width direction of the liquid cooling plate (311); the high and low voltage circuit board (33) is arranged on the tops of two or more groups of the battery cell groups (32) and is electrically connected to two or more groups of the battery cell groups (32).

4. The multi-module battery system according to claim 3, wherein It further includes a high voltage connection row assembly (7); the high voltage connection row assembly (7) includes a plurality of high voltage connection rows (71). The high and low voltage circuit boards (33) between multiple battery modules (3) and between the high and low voltage circuit boards (33) of multiple battery modules (3) and the electrical control box (5) are electrically connected through the high voltage connection rows (71).

5. The multi-module battery system according to claim 4, wherein, The high voltage connection row (71) is a shaped metal plate formed by bending a strip-shaped metal plate, and its outer wall is coated with an insulating layer.

6. The multi-module battery system according to claim 4, wherein The high voltage connection row assembly (7) further includes a plurality of high voltage bases (72); each of the front end plate assemblies (312) is detachably connected with the high voltage base (72); in the fixing hole (721) on the front end face of the high voltage base (72), a fastener (722) is installed for tightly connecting the connection end of the high voltage connection row (71) and the outgoing line end of the high and low voltage circuit board (33).

7. The multi-module battery system according to claim 1, wherein, Multiple BMS battery management devices (6) are all arranged corresponding to between the sealing door (12) and the corresponding battery module (3), and are all electrically connected to the corresponding high and low voltage circuit board (33) through a low voltage wire harness (63).

8. The multi-module battery system according to claim 1, wherein There are two or more groups of the battery racks (2), and two or more groups of the battery racks (2) are arranged in parallel along the width direction of the sealed cabinet (1); the high and low voltage circuit boards (33) of the battery modules (3) on adjacent two groups of the battery racks (2) are electrically connected.

9. The multi-module battery system according to claim 1, wherein, It further includes a fire fighting pipeline assembly (8), and the fire fighting pipeline assembly (8) includes a fire fighting main pipe (81) and a plurality of fire fighting branch pipes (82); the fire fighting main pipe (81) is arranged on the battery rack (2) along the height direction of the battery rack (2) and corresponds to the side of the battery module installation cavity (21); one end of the fire fighting main pipe (81) penetrates through the outer wall of the sealed cabinet (1) and extends to the outside of the sealed cabinet (1); a plurality of the fire fighting branch pipes (82) are arranged corresponding to a plurality of the battery module installation cavities (21) one by one, one ends of the plurality of fire fighting branch pipes (82) are all connected and communicate with the fire fighting main pipe (81), and the other ends extend into the corresponding battery module installation cavity (21).

10. A containerized power supply, characterized in that, It includes a plurality of battery systems of a multi-module as described in any one of claims 1-9 and a container (9); a plurality of battery systems are horizontally arranged in parallel in the container (9).

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