Battery PACK device and container energy storage system

Abstract

The utility model discloses a battery PACK device and a container energy storage system. The device comprises a battery core assembly, the battery cell assembly comprises a plurality of single modules which are arranged at intervals. Each single module comprises two or more battery cell columns and a busbar, the two or more battery cell columns are arranged along a first direction, each battery cell column comprises a plurality of battery cell monomers, the plurality of battery cell monomers are arranged along a second direction, the second direction is perpendicular to the first direction, and the number of the battery cell monomers in each battery cell column is the same. The busbar comprises an insulating plate and a plurality of current paths, the current paths are integrated on the insulating plate, the number of the current paths is the same as that of the battery cell columns, each current path corresponds to one battery cell column, and the current paths are used for sequentially connecting a plurality of battery cell monomers in the battery cell columns in series. According to the battery PACK device, each battery cell does not need to be independently wired, so that the production efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model specifically relates to a battery PACK device and a container energy storage system. Background Art

[0002] The surge in demand for energy storage in China has brought new growth to the energy IT industry, and the trillion-dollar energy storage market is booming. As a core component in the energy storage market, PACK battery modules are moving towards higher density and higher integration. The current mainstream PACK module structure requires individual wiring for each battery cell, resulting in low production efficiency. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a battery PACK device and a container energy storage system in response to the above-mentioned deficiencies in the prior art. The battery PACK device does not require separate wiring for each battery cell, thereby effectively improving production efficiency.

[0004] According to an embodiment of the first aspect of the present utility model, a battery PACK device is provided, comprising: a shell, a battery cell assembly; a housing is provided inside the shell, and the battery cell assembly is accommodated in the housing; the battery cell assembly comprises a plurality of single modules, and the plurality of single modules are arranged at intervals; the single module comprises a battery cell column and a bus, the number of the battery cell columns is two or more, and two or more of the battery cell columns are arranged along a first direction, the battery cell column comprises a plurality of battery cell monomers, and the plurality of battery cell monomers are arranged along a second direction, the second direction is perpendicular to the first direction, and the number of battery cell monomers in each of the battery cell columns is the same; the bus comprises an insulating plate and a plurality of current paths, the current paths are integrated on the insulating plate, the number of the current paths is the same as the number of the battery cell columns, each current path corresponds to a battery cell column, and the current path is used to connect the plurality of battery cell monomers in the battery cell column in series in sequence.

[0005] Preferably, the current path includes multiple contacts, and the multiple contacts are all installed on the insulating plate. The number of the contacts is the same as the sum of the positive and negative poles of the battery cells. Each contact corresponds to the positive or negative pole of a battery cell and is connected to the positive or negative pole. The contacts corresponding to two adjacent battery cells are connected in sequence, so that the positive and negative poles of the multiple battery cells are connected in series in sequence.

[0006] Preferably, the contact connected to the positive pole of the battery cell is set as the first contact, and the contact connected to the negative pole of the battery cell is set as the second contact, and the second contact of any one of the multiple battery cells is electrically connected to the first contact of the next battery cell; the battery cells located at both ends of the battery column are respectively the first end cell and the second end cell, the first contact of the first end cell is connected to the first bar, and the second contact of the second end cell is connected to the second bar, and the first bar and the second bar are used to extract the current of the multiple battery cells connected in series.

[0007] Preferably, the positive electrode and the negative electrode of the battery cell are both located on the top of the battery cell, and the positive electrode and the negative electrode of two adjacent battery cells are staggered.

[0008] Preferably, the single module also includes a first end plate, a second end plate and a cable tie; the first end plate and the second end plate are arranged opposite to each other, the battery cell is clamped between the first end plate and the second end plate, and the cable tie is wrapped around the first end plate, the battery cell and the second end plate to fix the position of the first end plate, the battery cell and the second end plate; the first bar is installed on the first end plate, and the second bar is installed on the second end plate.

[0009] Preferably, the first end plate and the second end plate are both made of insulating material.

[0010] Preferably, the busbar also includes a signal collector and a signal transmission unit. The number of signal collectors is the same as the number of current paths. Each signal collector corresponds to a current path. The signal collector is installed on the insulating board and electrically connected to the current path. The signal collector is used to collect the status signal of each battery cell, and the status signal includes a current signal, a voltage signal and a temperature signal. The signal collector is electrically connected to the signal transmission unit, and the signal transmission unit is used to upload the status signal to the battery management system for evaluation.

[0011] Preferably, the number of the battery cell columns in each single module is two, and the two battery cell columns are separated by an isolating member, which is sandwiched between the two battery cell columns.

[0012] Preferably, the spacer is an elastic member, and the shape of the spacer is adapted to the shape of the side walls of two adjacent battery cell columns.

[0013] According to an embodiment of the second aspect of the present invention, a container energy storage system is provided, comprising: a container and the above-mentioned battery PACK device; there are multiple battery PACK devices, and the multiple battery PACK devices are all installed in the container.

[0014] The battery PACK device of the present invention realizes the sequential connection of the battery cells in each battery cell column in a single module through a busbar, that is, the series connection of multiple battery cells in the battery cell column can be completed by simply aligning the busbar with the battery cell column for installation, without the need to connect each battery cell separately. Specifically, a plurality of contacts are installed on the insulating plate of the busbar, each contact corresponds to one of the positive or negative poles of the battery cell, and is connected to the positive or negative pole. Among them, the contact connected to the positive pole is the first contact, and the contact connected to the negative pole is the second contact. The second contact corresponding to any one of the multiple battery cells is electrically connected to the first contact corresponding to the next battery cell, so that the positive and negative poles of the multiple battery cells are sequentially connected in series. Moreover, the first contact of the first end cell is connected to the first bar, and the second contact of the second end cell is connected to the second bar. The first bar and the second bar extract the current of the multiple battery cells connected in series in sequence. Therefore, the battery PACK device does not need to connect each battery cell individually, and can quickly connect multiple battery cells in series through the busbar, thereby effectively improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a battery PACK device in an embodiment of the present utility model;

[0016] Figure 2 This is a top view of the battery PACK device in an embodiment of the present utility model;

[0017] Figure 3 This is a schematic structural diagram of a single module in an embodiment of the present utility model;

[0018] Figure 4a This is an exploded view of a single module in an embodiment of the present invention;

[0019] Figure 4b This is a schematic structural diagram of the end plate in an embodiment of the present utility model;

[0020] Figure 5 is a top view of the busbar in an embodiment of the present utility model;

[0021] Figure 6 This is a schematic structural diagram of a cable tie in an embodiment of the present utility model;

[0022] Figure 7 This is a partial structural diagram of a single module with the bus bar hidden in an embodiment of the present invention;

[0023] Figure 8 It is a bottom view of the busbar in the embodiment of the present utility model.

[0024] In the figure: 1-shell, 11-upper cover, 12-bottom plate, 121-first crossbeam, 122-second crossbeam, 123-third crossbeam;

[0025] 2-battery cell assembly, 21-single module, 22-battery cell, 23-bus, 231-insulating plate, 232-contact, 233-connecting piece, 234-first bar, 235-second bar, 24-first end plate, 25-second end plate, 26-cable tie, 27-signal collector, 28-signal transmission unit, 29-long through hole, 30-bar fixing hole. DETAILED DESCRIPTION

[0026] The following is a clear and complete description of the technical solutions of the utility model in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "upper" and "lower" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0028] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "connect," "dispose," "install," "fix," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0030] Example 1

[0031] See also Figure 1 and Figure 2 The utility model discloses a battery PACK device, including: a shell 1 and a battery core assembly 2.

[0032] The housing 1 is provided with a receiving cavity, and the battery cell assembly 2 is received in the receiving cavity. Specifically, the housing 1 includes an upper cover 11 and a bottom plate 12, the upper cover 11 is connected to the bottom plate 12, and a receiving cavity is formed between the upper cover 11 and the bottom edge. The battery cell assembly 2 includes a plurality of single modules 21, and the plurality of single modules 21 are arranged at intervals. Figure 3As shown, Figure 3 The structure of each single module 21 is shown in FIG.

[0033] Further, if Figure 4a As shown, a single module 21 includes two or more cell columns and a busbar 23. The cell columns are arranged along a first direction. The cell columns include multiple cell units 22, which are arranged along a second direction perpendicular to the first direction. The number of cell units 22 in each cell column is the same. The busbar 23 includes an insulating plate 231 and multiple current paths. The current paths are integrated on the insulating plate 231. The number of current paths is the same as the number of cell columns. Each current path corresponds to a cell column and is used to connect the multiple cell units 22 in the cell columns in series. The first direction refers to the horizontal width of the single module, and the second direction refers to the horizontal length of the single module.

[0034] It should be noted that the battery PACK device in this embodiment is particularly suitable for container energy storage systems. The battery PACK device used in container energy storage systems needs to consider the production cost of the battery device, subsequent maintenance, battery energy density, space utilization and other issues.

[0035] In existing battery pack devices, multiple battery cells 22 are typically arranged in a row to form a battery row. The battery row is then tightened with a cable tie 26 (or each battery cell 22 is individually positioned and fixed to the base plate 12) to position the battery cells 22 in the battery row. Next, each battery cell 22 needs to be wired to connect all the battery cells 22 in series and parallel, thereby assembling a battery module 21. Multiple battery modules 21 are then assembled into a battery pack. Within the battery pack, each battery module 21 needs to be installed at intervals.

[0036] First, there is a problem that there are a large number of battery cells 22 , and it is very troublesome to connect each battery cell 22 individually, resulting in low production efficiency, high cost, and inconvenient subsequent maintenance.

[0037] In this regard, the battery PACK device in this embodiment uses the bus 23 to realize the sequential series connection of the battery cells 22 in each battery cell column in the single module 21 (i.e., the battery cell single module 21). That is, it is only necessary to align the bus 23 with the battery cell column for installation to complete the series connection of multiple battery cell units 22 in the battery cell column without the need to connect each battery cell separately.

[0038] Specifically, the insulating plate 231 of the busbar 23 is integrated with a current path, each current path corresponds to a battery column, and the current path is used to connect multiple battery cells 22 in the battery column in series. Figure 7 and Figure 8 As shown, the current path includes multiple contacts 232, and the multiple contacts 232 are all installed on the insulating plate 231. The number of contacts 232 is the same as the sum of the positive and negative poles of the battery cells 22. Each contact 232 corresponds to the positive or negative pole of a battery cell 22 and is connected to the positive or negative pole. The contacts 232 corresponding to two adjacent battery cells 22 are connected in sequence, so that the positive and negative poles of multiple battery cells 22 are connected in series in sequence.

[0039] When installing the busbar 23, align these contacts 232 of the current path with the positive or negative pole of the battery cell 22 respectively, and then fix the insulating plate 231 to the battery cell column through the connector, so that each contact 232 on each insulating plate 231 is pressed against the positive or negative pole of its corresponding battery cell 22. When multiple contacts 232 are in contact with the positive and negative poles of the battery cell 22, the current path is connected, so that the multiple battery cells 22 are connected in series in sequence. The advantage of integrating multiple contacts 232 on the insulating plate 231 is that by designing the position and layout of each contact 232 on the insulating plate 231 in advance, it is convenient for the staff to connect each battery cell 22 in series, thereby improving production efficiency and reducing production costs.

[0040] Please continue reading Figure 8 Furthermore, in order to more conveniently describe the layout and connection relationship between the multiple contacts 232, the contact 232 connected to the positive pole of the battery cell 22 is set as the first contact, and the contact 232 connected to the negative pole of the battery cell 22 is set as the second contact. The second contact corresponding to any one of the multiple battery cell 22 is electrically connected to the first contact corresponding to the next battery cell 22. Specifically, the first contact and the second contact can be connected by a connecting piece 233 made of a conductive material (such as a connecting piece 233 made of copper or aluminum). The battery cell 22 located at both ends of the battery cell column are respectively the first end monomer and the second end monomer. The first contact of the first end monomer is connected to the first bar 234, and the second contact of the second end monomer is connected to the second bar 235. The first bar 234 and the second bar 235 are used to derive the current of the multiple battery cell 22 connected in series.

[0041] The advantages of such an arrangement of the first contacts and the second contacts are: first, it is easy to install. The staff can directly press the bus 23 onto the multiple battery cells 22. At the same time, the power generation equipment / power consumption equipment can be connected through the reserved first bar 234 and second bar 235; second, each adjacent battery cell 22 will not affect each other or even short-circuit.

[0042] In this embodiment, if Figure 7 and Figure 8As shown, the positive electrode and the negative electrode of the battery cell 22 are both located at the top of the battery cell 22, and the positive electrodes and negative electrodes of two adjacent battery cells 22 are staggered. Figure 7 As shown, taking any one of the multiple battery cells 22 as an example, if the positive electrode of the battery cell 22 is on the left, then its negative electrode is on the right; then the positive electrode of the next battery cell 22 is on the right and the negative electrode is on the left.

[0043] In other embodiments, the positive and negative electrodes of the cell 22 are both located at the top of the cell 22, with the positive and negative electrodes of two adjacent cells 22 positioned on the same side. For example, if the positive electrode of a cell 22 is on the left, its negative electrode is on the right; the positive electrode of the next cell 22 is still on the left, and the negative electrode is on the right. In this case, the connecting piece 233 needs to be tilted (i.e., diagonally) to achieve connection between the first contact and the second contact.

[0044] It can be seen that by staggering the positive and negative electrodes of two adjacent battery cells 22 , the length of the connecting piece 233 can be effectively reduced, thereby reducing production costs and improving production efficiency.

[0045] See also Figure 3 、 Figure 4a and Figure 4b In this embodiment, the single module 21 further includes a first end plate 24, a second end plate 25 and a fixing member. Figure 6 As shown, the fixing member is a cable tie 26 (such as a steel belt, a plastic-steel belt, etc.) or a fixing member with equivalent function.

[0046] The first end plate 24 and the second end plate 25 are arranged opposite each other, and the battery cell 22 is sandwiched between the first end plate 24 and the second end plate 25. The cable tie 26 is wrapped around the first end plate 24, the battery cell 22, and the second end plate 25 to fix the positions of the first end plate 24, the battery cell 22, and the second end plate 25. The first bar 234 is installed on the first end plate 24, and the second bar 235 is installed on the second end plate 25.

[0047] To prevent short circuits, the first and second end plates 24 and 25 are made of insulating materials, such as fiberglass reinforced plastic (FRP). This material is lightweight, hard, and non-conductive, making it suitable for the end plates of the single module 21.

[0048] In this embodiment, by integrating the contacts 232 (first contact, second contact) on the lower end surface of the insulating plate 231, and then fixing the first bar 234 on the bar fixing hole 30 of the first end plate 24 and fixing the second bar 235 on the bar fixing hole 30 of the second end plate 25, the bus 23 and the multiple battery cells 22 can be fixed together.

[0049] In other words, a plurality of contacts 232 are installed on the insulating plate 231 of the busbar 23, and each contact 232 corresponds to one of the positive or negative poles of the battery cell 22 and is connected to the positive or negative pole. Among them, the contact 232 connected to the positive pole is the first contact, and the contact 232 connected to the negative pole is the second contact. The second contact corresponding to any one of the multiple battery cells 22 is electrically connected to the first contact corresponding to the next battery cell 22, so that the positive and negative poles of the multiple battery cells 22 are connected in series in sequence. In addition, the first contact of the first end cell is connected to the first bar 234, and the second contact of the second end cell is connected to the second bar 235. The first bar 234 and the second bar 235 extract the current of the multiple battery cells 22 connected in series in sequence.

[0050] In summary, the battery PACK device does not need to connect each battery cell individually, and can quickly connect multiple battery cells 22 in series through the busbar 23, thereby effectively improving production efficiency and reducing production costs.

[0051] Furthermore, the cells in existing single-cell modules 21 (i.e., the aforementioned single-cell modules 21) are at risk of excessive squeezing during stacking and installation, which can affect heat dissipation and performance, making it difficult to ensure product quality. To avoid the risk of excessive squeezing between cells (especially between rows of cells), each single-cell module 21 only contains one row of cells. However, this results in a lower energy density of the battery pack and increased production costs.

[0052] Taking a battery pack with 100 cells 22 as an example, if each cell row contains 10 cells 22, 10 binding operations are required during the production process to form 10 cell modules 21. Obviously, compared to each cell module 21 containing multiple cell rows, a cell module 21 with a single cell row requires more components such as cable ties 26 and end plates, resulting in higher production costs. However, if multiple cell rows are used to bind a single module 21, there is a risk of excessive squeezing between the cell rows.

[0053] In this embodiment, the number of cell rows is two or more, for example, 2-3. Each cell row contains 10-15 cell units 22. Excessive cell rows would result in a single module being too large, making production and handling inconvenient, resulting in low production efficiency, and inconvenient maintenance.

[0054] Preferably, each single module 21 contains two rows of cells, and each row contains 13 cells 22. The two rows of cells are separated by a separator, which is sandwiched between the two rows of cells. The separator is an elastic member, and its shape is adapted to the shape of the sidewalls of the two adjacent rows of cells.

[0055] In order to further reduce the risk of excessive extrusion caused by stacking the battery cells 22 , a spacer is also provided between two adjacent battery cells 22 in each battery cell column. The shape of the spacer is adapted to the shape of the side wall between the two adjacent battery cells 22 .

[0056] By providing an elastic spacer, it is possible to effectively reduce excessive compression between the cell array and the cell unit 22, and to avoid the risk of excessive heat concentration between the cells that are too close together, which may damage the cell unit 22. The spacer can be made of silicone material.

[0057] See also Figure 5 and Figure 8 The bus 23 also includes a signal collector 27 and a signal transmission unit 28. The number of signal collectors 27 is the same as the number of current paths, with each signal collector 27 corresponding to one current path. The signal collector 27 is mounted on the insulating plate 231 and electrically connected to the current path. The signal collector 27 is used to collect status signals from each battery cell 22, including current, voltage, and temperature signals. The signal collector 27 can be a commercially available CMU (i.e., battery cell monitoring unit) capable of monitoring the aforementioned signals, such as the RD33775ACNTEVB CMU manufactured by NXP.

[0058] The signal collector 27 is electrically connected to the signal transmission unit 28, which is used to upload the status signal to the battery management system for evaluation. The battery management system can use a commercially available BMU device (ie, battery management unit), which will not be described in detail here.

[0059] The battery management system can monitor the voltage, current, and temperature of each battery cell 22 using the status signals of each battery cell 22 emitted by the signal collector 27 and signal transmission unit 28. Specifically, the BMU accurately monitors the voltage of each battery cell to ensure that the battery operates within a safe voltage range and prevent overcharging and over-discharging. This is an important means of protecting battery safety and extending battery life. Monitoring the charge and discharge current through current sensors can prevent overload damage to the battery and ensure that the battery operates within a reasonable current range. Furthermore, by monitoring the temperature of the battery pack and the cells through built-in temperature sensors, the BMU can prevent battery overheating or overcooling, which is crucial for maintaining battery performance and preventing safety issues such as thermal runaway.

[0060] The battery PACK device can monitor the status of each battery cell 22, so that when a battery cell fails, it can be quickly inspected, repaired or replaced.

[0061] See also Figure 1 4 , the improvement of the battery PACK device in this embodiment will be further described below.

[0062] The current mainstream PACK module structure on the market has an irregular arrangement of internal battery cells. This structural design has the following problems.

[0063] 1. During the stacking and installation process, there is a risk of excessive extrusion of battery cells, which will affect the heat dissipation and performance of the battery cells, making it difficult to ensure product quality.

[0064] 2. A single module is too large, making it inconvenient to transport during production, and the production efficiency is generally low.

[0065] 3. Too many cells are connected by a single wire, which causes transmission delay, making it difficult to troubleshoot and repair, and resulting in high maintenance costs.

[0066] In this regard, the PACK large module structure (battery PACK device) in this embodiment can provide a modular prefabrication method under the premise of meeting the electrical performance requirements of the PACK module: the battery module is divided into multiple large modules, and a single module contains multiple single batteries, a connecting row, a signal acquisition and transmission device, and a single module fixing device. The connecting row includes welding plates between battery cells and welding parts at the ends of the battery cells. The signal transmission device includes cables or circuit boards, a signal collector 27, and supporting fixtures. The single module fixing device includes several end plates at the front and rear ends of the battery cell, and outer connecting fixtures surrounding the end plates and the battery cell to form the module.

[0067] To overcome the problems of excessive cell extrusion, uneven heat dissipation, and low module assembly efficiency within existing PACK modules, this embodiment provides a simple, highly integrated, and reliable internal module structure for a battery PACK. Furthermore, by controlling the size of individual modules, the extrusion force between modules is kept within a certain control range. Removable buffer insulation material (i.e., spacers) is placed between the cells within the module to block heat diffusion from the individual cells while also allowing for a certain tolerance for fluctuations in cell thickness.

[0068] The internal module design of the battery PACK device has multiple identical or similar single modules. The single module includes multiple single batteries (i.e., battery cell 22), a connecting bar (i.e., a bus bar 23), a signal acquisition and transmission device (i.e., a signal collector 27), and a single module fixing device (i.e., a first end plate 24, a second end plate 25, and a cable tie 26). The connecting bar (bus bar 23) includes a welding piece between the battery cells (i.e., the above-mentioned connecting piece 233), and a welding piece at the end of the battery cell (i.e., a first piece 234 and a second piece 235). The signal transmission device includes a cable or a circuit board, a signal collector 27, and a supporting fixture. The single module fixing device includes several end plates at the front and rear ends of the battery cell, and an outer connecting fixture surrounding the end plates and the battery cell to form a module.

[0069] The end portion is made of non-metallic material and is integrated with a bar fixing device, eliminating the need for additional insulation devices. Multiple single modules make up the entire module inside the PACK. Depending on the refrigeration form, a certain gap is reserved between the single modules: it can be filled with heat-conducting material or a reserved air duct design. Specifically, the installation position of each single module is preset on the base plate 12, and a first mounting hole and a second mounting hole are respectively opened at both ends of the installation position. The first mounting hole corresponds to the first end plate 24, and the second mounting hole corresponds to the second end plate 25. A fixing hole (i.e., a long through hole 29) is opened on the first end plate 24 and the second end plate 25. The fixing hole (long through hole 29) extends in the vertical direction and passes through the end plate (the first end plate 24 and the second end plate 25). The first end plate 24 can be fixedly connected to the first mounting hole by bolts, screws and other fixing parts; similarly, the second end plate 25 can be fixedly connected to the second mounting hole by bolts, screws and other fixing parts. In other words, the end plate opening has two functions: fixing the module and fixing the bus after the front and rear modules are connected in series. The structural forms of the end plates (the first end plate and the second end plate) are standardized, which ensures the versatility of the parts and avoids the risk of rework due to incorrect installation on site.

[0070] Furthermore, individual modules are connected to the pack base via screws, and modules are rigidly connected via connectors to ensure module strength and integrity. Insulation and thermal conductivity materials are added to the contact area between the module base and the pack, and insulation materials are added to the outer ring and top cover to ensure electrical safety and uniform cell temperature. Modules are interconnected via copper busbars or cables to transmit signals and power.

[0071] The following describes in detail the other structures of the battery pack device in this embodiment:

[0072] Figure 1 This diagram shows the internal module layout of this battery pack. This embodiment provides a battery pack internal module structure with a simple structure, high integration, excellent structural strength, good cell temperature uniformity, and high reliability. The battery pack device in this embodiment consists of a base, a top cover, a cell module, and insulating and thermally conductive materials. Insulating and thermally conductive materials are added at the contact point between the module and the base.

[0073] Figure 1 The figure also shows how the single module is secured to the PACK housing 1. Beams 1 (first beam 121), 2 (second beam 122), and 3 (third beam 123) are designed on the front, middle, and rear sides of the battery pack's bottom surface for assembling the battery modules. The battery cell modules are secured to beams 1 and 2 on the base using screws.

[0074] Figure 3This is the appearance diagram of the battery module. The single module 21 is composed of battery cells, wiring harness brackets, end plates, protective plates, battery cell connecting aluminum bars, bundling steel strips and other parts. In this example, multiple battery cells are connected by glue or double-sided tape, and the ends are composed of several end plates (in other words, two oppositely arranged end plates (i.e., the first end plate 24 and the second end plate 25), and multiple battery cells are located between the two oppositely arranged end plates), which play the role of insulation and structural fixation. The end plates and battery cell columns are initially positioned by glue or double-sided tape. Through special tooling, the entire module is fixed with 2 or more fixings (such as steel strips, plastic steel strips or fixings with equivalent functions) to ensure the reliability of the connection between modules. The connecting piece 233 at the top of the module connects the battery cells in series in the module by welding, and the end connecting piece 233 is reserved for fixing the connection module, as shown in the figure, to facilitate electrical interconnection between modules. A wiring harness bracket is integrated on the top of the module to collect the wiring of the wiring harness and fix the connecting piece 233. The wiring harness bracket is fixed to the end plates on both sides by screws. After the single module is formed, an insulating film is added to the bottom. The single module is fixed to the bottom beam through the long through hole 29 (i.e. the through hole in the vertical direction mentioned above) reserved on the end plate. Figure 1 shown.

[0075] In summary, the PACK module in this embodiment has the following advantages.

[0076] 1. No risk of excessive cell extrusion, and better module heat dissipation;

[0077] 2. The volume of a single module is controllable, the production and installation efficiency is high, and it is easy to inspect and troubleshoot;

[0078] 3. High integration: Before being loaded into the PACK, the single module has completed the pre-installation of electrical connections, monitoring, and fixings.

[0079] Example 2

[0080] The utility model also discloses a container energy storage system, comprising: a container and the battery PACK device in embodiment 1.

[0081] There are multiple battery PACK devices, and all of the battery PACK devices are installed in the container.

[0082] The container energy storage system in this embodiment, by adopting the battery pack device of Example 1, can effectively improve space utilization and increase energy density. Specifically, the battery pack device adopts a dual-row cell layout. Compared with a single-row cell layout, the dual-row cell layout can accommodate more cells in the same space by increasing the arrangement of cells, thereby improving the energy density and space utilization of the battery module. This layout has significant advantages in fields with high energy density requirements, such as containerized energy storage systems.

[0083] Furthermore, compared to multi-row cell layouts (e.g., 3-4 or more), a dual-row layout improves energy density and space utilization while maintaining manageable module size, improving production and installation efficiency, and facilitating troubleshooting without increasing maintenance and management complexity. A layout with too many rows of cells results in oversized modules, making production and handling difficult and generally resulting in low production efficiency.

[0084] Furthermore, while a dual-row cell layout achieves higher space utilization, it can also result in a more compact space between cells. This compact layout makes interactions between cells more pronounced when subjected to external pressure or vibration, increasing the risk of localized pressure concentration. Therefore, the battery pack device incorporates elastic spacers between the two battery rows, and between adjacent cells 22 within each row, to further reduce the risk of squeezing when stacking cells 22.

[0085] It should also be noted that in the prior art, compared with the single-row battery cell layout, the electrical connection lines of the double-row battery cell layout are more complicated and require more connectors and wires.

[0086] In this embodiment, two sets of current paths are integrated on the busbar 23, each corresponding to a cell column. The current paths can connect multiple cells 22 in the cell column in series, thereby greatly simplifying the wiring process of the electrical circuit of the dual-column cell layout.

[0087] In summary, the expansion of the battery PACK device from a single-row cell to a dual-row cell can improve space utilization, mainly because the dual-row layout can be achieved by reducing gaps and redundant space, optimizing module size and structure, and improving energy density.

[0088] At the same time, the battery pack device has the following advantages:

[0089] 1. No risk of excessive cell extrusion, and better module heat dissipation;

[0090] 2. The volume of a single module is controllable, the production and installation efficiency is high, and it is easy to inspect and troubleshoot;

[0091] 3. High integration: Before being loaded into the PACK, the single module has completed the pre-installation of electrical connections, monitoring, and fixings.

[0092] The container energy storage system in this embodiment has good space utilization and high energy density, low production cost, and can be easily repaired and inspected.

[0093] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art may make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A battery pack device, characterized in that: include: Housing (1), battery core assembly (2); The housing (1) is provided with an accommodating cavity inside, and the battery core assembly (2) is accommodated in the accommodating cavity; The battery core assembly (2) comprises a plurality of single modules (21), and the plurality of single modules (21) are arranged at intervals; The single module (21) includes a battery cell array and a busbar (23), the number of the battery cell arrays is two or more, the two or more battery cell arrays are arranged along a first direction, the battery cell array includes a plurality of battery cell monomers (22), the plurality of battery cell monomers (22) are arranged along a second direction, the second direction is perpendicular to the first direction, and the number of battery cell monomers (22) in each battery cell array is the same; The busbar (23) comprises an insulating plate (231) and a plurality of current paths, wherein the current paths are integrated on the insulating plate (231), the number of the current paths is the same as the number of the battery cell columns, each current path corresponds to a battery cell column, and the current paths are used to sequentially connect the plurality of battery cell monomers (22) in the battery cell column in series.

2. The battery pack device according to claim 1, characterized in that: The current path includes a plurality of contacts, all of which are mounted on the insulating plate (231). The number of the contacts is the same as the sum of the positive and negative electrodes of the battery cells (22). Each contact corresponds to the positive or negative electrode of a battery cell (22) and is connected to the positive or negative electrode. The contacts corresponding to two adjacent battery cells (22) are connected in sequence, so that the positive and negative electrodes of the plurality of battery cells (22) are connected in series in sequence.

3. The battery pack device according to claim 2, characterized in that: The contact connected to the positive electrode of the battery cell (22) is set as the first contact, and the contact connected to the negative electrode of the battery cell (22) is set as the second contact, and the second contact corresponding to any one of the plurality of battery cells (22) is electrically connected to the first contact corresponding to the next battery cell (22); The battery cells (22) located at both ends of the battery cell array are respectively a first end cell and a second end cell, a first contact of the first end cell is connected to a first bar (234), a second contact of the second end cell is connected to a second bar (235), and the first bar (234) and the second bar (235) are used to extract currents of a plurality of battery cells (22) connected in series.

4. The battery pack device according to claim 3, characterized in that: The positive electrode and the negative electrode of the battery cell (22) are both located on the top of the battery cell (22), and the positive electrode and the negative electrode of two adjacent battery cell (22) are arranged in a staggered manner.

5. The battery pack device according to claim 3 or 4, characterized in that: The single module (21) further includes a first end plate (24), a second end plate (25) and a cable tie (26); The first end plate (24) and the second end plate (25) are arranged opposite to each other, the battery cell (22) is sandwiched between the first end plate (24) and the second end plate (25), and the tie (26) is wrapped around the first end plate (24), the battery cell (22) and the second end plate (25) to fix the positions of the first end plate (24), the battery cell (22) and the second end plate (25); The first bar piece (234) is installed on the first end plate (24), and the second bar piece (235) is installed on the second end plate (25).

6. The battery pack device according to claim 5, characterized in that: The first end plate (24) and the second end plate (25) are both made of insulating material.

7. The battery pack device according to claim 1 or 2, characterized in that: The busbar (23) further comprises a signal collector (27) and a signal transmission unit (28). The number of the signal collectors (27) is the same as the number of the current paths, and each signal collector (27) corresponds to one current path. The signal collector (27) is mounted on the insulating plate (231) and is electrically connected to the current path. The signal collector (27) is used to collect a status signal of each battery cell (22), wherein the status signal includes a current signal, a voltage signal, and a temperature signal. The signal collector (27) is electrically connected to the signal transmission unit (28), and the signal transmission unit (28) is used to upload the status signal to a battery management system for evaluation.

8. The battery pack device according to claim 1, characterized in that: The number of the battery cell rows in each single module (21) is two, and the two battery cell rows are separated by an isolating member, which is sandwiched between the two battery cell rows.

9. The battery pack device according to claim 8, characterized in that: The isolating member is an elastic member, and the shape of the isolating member is adapted to the shapes of the side walls of two adjacent battery cell columns.

10. A container energy storage system, characterized in that: include: A container and a battery PACK device according to any one of claims 1 to 9; There are multiple battery PACK devices, and the multiple battery PACK devices are all installed in the container.

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