A symmetric distributed integrated energy storage battery module

Abstract

The present invention discloses a symmetric distributed integrated energy storage battery module, which includes a battery pack, a wire harness isolation board respectively assembled at the upper and lower ends of the battery pack, and a BMS module on one side; the battery pack is composed of 2<supgt;n< / supgt> cylindrical battery cells placed vertically and distributed in a matrix, where n is a positive integer greater than or equal to 2; a plurality of series-parallel aluminum bars for series-parallel connection of the cylindrical battery cells are arranged on both the upper and lower wire harness isolation boards, and a pair of input / output pole aluminum bars are led out from one of the wire harness isolation boards, and the input / output pole aluminum bars are also connected to the BMS module for control. The present invention adopts cylindrical battery cells to form a symmetric battery pack in a matrix manner, and realizes the series-parallel connection of the battery cells into a group through the series-parallel aluminum bars and the input / output pole aluminum bars to meet the requirements of energy storage and power supply. The overall module size is compact and symmetric, meeting the requirements of various installation conditions inside the electrical box. At the same time, in order to improve the performance of the battery module, a BMS module is added to manage each battery cell, effectively improving the performance of the energy storage battery.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage batteries, and particularly to a symmetric distributed integrated energy storage battery module. Background Art

[0002] In recent years, with the continuous development of energy storage technologies, customers not only have higher and higher requirements for the power storage capacity of energy storage batteries, but also the usage scenarios are becoming more and more complex. Therefore, in order to meet various application scenarios, current energy storage batteries usually require customized design.

[0003] Currently, the existing practices are basically to carry out specific systematic designs according to the series-parallel connection methods required by customers or the adaptation requirements of low-voltage / high-voltage systems, and cannot meet the requirements of various installation conditions inside electrical boxes. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a symmetric distributed integrated energy storage battery module that can be compatible with most electrical systems and meet the requirements of various installation conditions inside electrical boxes.

[0005] In order to solve the above technical problem, the technical solution adopted by the present invention is:

[0006] A symmetric distributed integrated energy storage battery module, comprising a battery pack, a wire harness isolation board respectively assembled at the upper and lower ends of the battery pack, and a BMS module on one side;

[0007] The battery pack is composed of 2 n vertically arranged and matrix-distributed cylindrical battery cells, where n is a positive integer greater than or equal to 2;

[0008] A plurality of series-parallel aluminum bars for series-parallel connection of the cylindrical battery cells are provided on both the upper and lower wire harness isolation boards, and a pair of input / output pole aluminum bars are led out from one of the wire harness isolation boards, and the input / output pole aluminum bars are also connected to the BMS module for control.

[0009] The beneficial effects of the present invention are as follows: The present invention provides a symmetric distributed integrated energy storage battery module. The battery cells constituting the battery pack are cylindrical battery cells and are symmetrically arranged in a matrix manner. With the cooperation of series-parallel aluminum bars and output pole aluminum bars, the cylindrical battery cells are connected in series and parallel to form a battery pack to meet the requirements of energy storage and power supply. The overall battery module has a compact and symmetric size, meets the requirements of various installation conditions inside electrical boxes, and at the same time, in order to improve the performance of the battery module, a BMS module is added to manage each battery cell, effectively improving the performance of the energy storage battery. Brief Description of the Drawings

[0010] Figure 1 It is the overall structure diagram of a symmetric distributed integrated energy storage battery module according to an embodiment of the present invention;

[0011] Figure 2 Explosion diagram of a symmetric distributed integrated energy storage battery module according to an embodiment of the present invention;

[0012] Figure 3 Schematic structural diagram of the upper wire harness isolation board and the insulating sheet in a symmetric distributed integrated energy storage battery module;

[0013] Figure 4 Schematic structural diagram of the upper wire harness isolation board in a symmetric distributed integrated energy storage battery module;

[0014] Figure 5 Schematic structural diagram of the lower wire harness isolation board in a symmetric distributed integrated energy storage battery module;

[0015] Figure 6 Schematic diagram of the aluminum bar distribution on the upper wire harness isolation board in a symmetric distributed integrated energy storage battery module;

[0016] Figure 7 Schematic diagram of the aluminum bar distribution on the lower wire harness isolation board in a symmetric distributed integrated energy storage battery module;

[0017] Figure 8 Top view of the upper wire harness isolation board in a symmetric distributed integrated energy storage battery module;

[0018] Figure 9 Schematic diagram of the horizontal installation of a symmetric distributed integrated energy storage battery module;

[0019] Figure 10 Schematic diagram of the longitudinal installation of a symmetric distributed integrated energy storage battery module;

[0020] Figure 11 Schematic structural diagram of another angle of a symmetric distributed integrated energy storage battery module.

[0021] Label description:

[0022] 1. Battery pack; 11. Cylindrical battery cell;

[0023] 2. Wire harness isolation board; 21. Series-parallel aluminum bar; 22. Input / output pole aluminum bar; 221. Positive end of the aluminum bar; 222. Negative end of the aluminum bar; 23. Aluminum bar fixing groove; 24. Battery cell fixing groove; 241. Pole column notch; 25. Battery cell state sampling line; 26. Upper wire harness sampling bus; 27. Lower wire harness sampling bus; 28. Horizontal through hole; 29. Vertical through hole; 20. Countersunk hole;

[0024] 3. BMS module; 31. BMS fixing plate; 32. Transfer wire harness; 33. Multi-way wire splitting; 34. Soft aluminum bar; 35. Negative extreme of BMS; 36. Positive extreme of BMS;

[0025] 4. Insulating sheet. Specific implementation manner

[0026] To describe in detail the technical content, achieved objectives and effects of the present invention, the following is described in conjunction with the implementation manners and with reference to the accompanying drawings.

[0027] Please refer to Figures 1 to 11 , a symmetric distributed integrated energy storage battery module, including a battery pack, wire harness isolation plates respectively assembled at the upper and lower ends of the battery pack, and a BMS module on one side;

[0028] The battery pack is composed of 2 n vertically arranged and matrix-distributed cylindrical battery cells, where n is a positive integer greater than or equal to 2;

[0029] On both the upper and lower wire harness isolation plates, a plurality of series-parallel aluminum bars for series-parallel connection of the cylindrical battery cells are provided, and a pair of input / output pole aluminum bars are led out from one of the wire harness isolation plates, and the input / output pole aluminum bars are also connected to the BMS module for control.

[0030] From the above description, it can be seen that the beneficial effects of the present invention are as follows: The battery cells constituting the battery pack adopt cylindrical battery cells and are symmetrically arranged in a matrix manner. With the series-parallel aluminum bars and output pole aluminum bars, the cylindrical battery cells are series-parallel connected to form a battery pack to meet the energy storage and power supply requirements. The overall battery module has a compact and symmetric size, meeting the requirements of various installation conditions inside the electric box. At the same time, in order to improve the performance of the battery module, a BMS module is added to manage each battery cell, effectively improving the performance of the energy storage battery.

[0031] Further, the interval between two adjacent cylindrical battery cells is 2 - 4 mm;

[0032] The cylindrical battery cells are pairwise connected in parallel by the series-parallel aluminum bars to form a group of battery cell groups;

[0033] Multiple groups of the battery cell groups are sequentially connected in series through the series-parallel aluminum bars to form the battery pack.

[0034] From the above description, it can be seen that the interval between the matrix-distributed cylindrical battery cells is limited to 2 - 4 mm, meeting the electrical clearance safety requirements of the battery cells; at the same time, after the battery cells are connected in parallel in pairs and then the parallel-connected battery cell groups are connected in series, the capacity and performance requirements of the battery pack are ensured.

[0035] Further, the cylindrical battery cell is a 23Ah 3.2V battery cell, and the number of the cylindrical battery cells is 32;

[0036] Thirty-two of the cylindrical battery cells are arranged in a matrix of four rows and eight columns, and the cylindrical battery cells with the columns upward are grouped in pairs to form the battery cell groups, and finally form the battery pack with 2 parallel and 16 series connections.

[0037] As can be seen from the above description, thirty-two cylindrical battery cells with a capacity of 23 Ah and a voltage of 3.2 V are connected in parallel in pairs to obtain 16 groups of battery cell groups, and then connected in series in sequence, realizing the overall layout of 2 parallel and 16 series connections, so as to obtain a battery module with a capacity of 46 Ah and a voltage of 51.2 V, that is, meeting the requirements of the most commonly used electrical systems, and thus being able to be applied to most electrical systems.

[0038] Furthermore, on one side of the wire harness isolation board facing the battery pack, there are battery cell fixing grooves corresponding to the number and position of the cylindrical battery cells one by one;

[0039] Both ends of the cylindrical battery cell are respectively embedded into the battery cell fixing grooves of the upper and lower wire harness isolation boards, and a pole column notch for exposing the pole column of the cylindrical battery cell is provided in the battery cell fixing groove;

[0040] On the side of the wire harness isolation board away from the battery pack, there are aluminum bar fixing grooves for placing the series-parallel aluminum bars and the input / output pole aluminum bars, and the pole column notch leads to the aluminum bar fixing groove. The series-parallel aluminum bars and the input / output pole aluminum bars are connected in series and in parallel with the pole columns of the cylindrical battery cells by being installed in the aluminum bar fixing grooves to realize the series-parallel connection and total input / output of the cylindrical battery cells.

[0041] As can be seen from the above description, there are battery cell fixing grooves for fixing the upper and lower ends of the cylindrical battery cells on the upper and lower wire harness isolation boards at most, acting as the brackets for forming the battery cells and ensuring the structural stability of the overall battery pack; at the same time, on the side of the wire harness isolation board away from the battery pack, there are aluminum bar fixing grooves for placing the series-parallel aluminum bars and the input / output pole aluminum bars, realizing the front-back, left-right limit of the aluminum bars and preventing the aluminum bars from falling off, further improving the structural stability of the battery pack.

[0042] Furthermore, battery cell state sampling wires are fixedly connected to the series-parallel aluminum bars and the input / output pole aluminum bars by dispensing;

[0043] The battery cell state sampling wires on the upper and lower wire harness isolation boards are routed through the gaps between the aluminum bar fixing grooves, and are respectively aggregated into an upper wire harness sampling bus and a lower wire harness sampling bus and then connected to the BMS module.

[0044] As described above, the aluminum bar fixing grooves are not only used to place and fix the aluminum bars, but also the gaps between the aluminum bar fixing grooves can be used for routing the sampling wires that are adhesively connected to the aluminum bars in contact with each cylindrical battery cell, and planning the routing layout of the sampling wires, so that the BMS module can realize the state acquisition and performance monitoring of each battery cell, and improve the overall performance of the battery pack.

[0045] Furthermore, the BMS module further includes a transfer wire harness;

[0046] One end of the upper wire harness sampling bus and the lower wire harness sampling bus is connected to one end of the transfer wire harness, and the other end of the transfer wire harness is a multi-way branch line with the same number as the number of the battery cell state sampling wires. The multi-way branch lines respectively connect the multi-way battery cell state sampling wires to the I / O ports of the BMS chip in the BMS module.

[0047] As described above, after the single battery cell state sampling wires of each battery cell are routed and aggregated into a single sampling bus, they are integrally connected to the BMS module. In order to realize the separate management of each battery cell by the BMS module, a transfer wire harness is added to further divide the aggregated sampling bus into multi-way branch lines corresponding to the battery cell state sampling wires one by one and connect them to the respective I / O pins of the BMS chip, so that the BMS module can monitor the state of each battery cell in real time and improve the performance of the battery pack.

[0048] Furthermore, the BMS module further includes a flexible aluminum bar;

[0049] One end of the flexible aluminum bar is connected to the BMS positive terminal in the input / output terminal of the BMS module, and the other end is connected to the aluminum bar negative terminal in the input / output pole aluminum bar through a locking bolt.

[0050] As described above, in order to connect the input / output pole aluminum bar located at the upper or lower end of the battery pack to the BMS module installed on the side of the battery pack, a flexible aluminum bar is added, and the two ends are respectively connected to the aluminum bar negative terminal in the input / output pole aluminum bar and the BMS positive terminal in the input / output terminal of the BMS module, so as to enable the BMS module to work energized under the power supply of the battery pack; while the remaining aluminum bar positive terminal in the input / output aluminum bar and the remaining BMS negative terminal in the input / output terminal of the BMS module can be used as the positive and negative input / output of the entire energy storage battery module, connected to an external power supply to realize the charging and energy storage of the battery pack, and connected to an external electrical load to realize the power supply to the external electrical load.

[0051] Furthermore, the BMS module further includes a BMS fixing plate;

[0052] The BMS fixing plate is locked to the same side of the two wire harness isolation plates through M3 insert nuts;

[0053] The BMS module is detachably locked to the side of the BMS fixing plate facing away from the battery pack by screws, and both the BMS positive terminal and the BMS negative terminal are provided on the BMS fixing plate.

[0054] As can be seen from the above description, adding the BMS fixing plate as the mounting plate of the BMS module and using M3 insert nuts to mount it on the battery pack side ensures the stable installation of the BMS module and prevents the BMS module from coming out of the battery pack.

[0055] Furthermore, an insulating sheet is further included;

[0056] There are two insulating sheets, which are respectively locked to the sides of the two wire harness isolation plates away from the battery pack by plastic rivets.

[0057] As can be seen from the above description, the insulating sheet can achieve the overall protection of the battery pack, isolate the wire harness isolation plate from contacting the outside world, and effectively avoid the short - circuit risk caused by the aluminum busbar and sampling wire on the wire harness isolation plate contacting the outside.

[0058] Furthermore, a plurality of through - transverse through - holes are correspondingly arranged on the front and rear sides of the wire harness isolation plate;

[0059] A plurality of through - longitudinal through - holes are correspondingly arranged in the middle of the upper and lower wire harness isolation plates along the axial direction of the cylindrical battery cells;

[0060] The transverse through - holes and the longitudinal through - holes are for long screws to pass through.

[0061] As can be seen from the above description, the transverse through - holes and the longitudinal through - holes can cooperate with long screws to realize the horizontal and vertical installation of the overall battery module in the electric box, meeting the installation requirements of different electric boxes.

[0062] A symmetric distributed and integrated energy storage battery module of the present invention can be compatible with most electrical systems and meet the requirements of various installation conditions inside electric boxes. The following is described in conjunction with specific embodiments:

[0063] Please refer to Figures 1 to 3 、 Figures 5 to 7 , the first embodiment of the present invention is:

[0064] A symmetric distributed and integrated energy storage battery module, as Figure 1 shown, includes a battery pack 1, wire harness isolation plates 2 assembled at the upper and lower ends of the battery pack 1 respectively, and a BMS module 3 on one side.

[0065] Among them, the battery pack 1 is composed of 2 n vertically arranged and matrix - distributed cylindrical battery cells 11, where n is a positive integer greater than or equal to 2. In this embodiment, as Figure 6 or Figure 7As shown, the number of cylindrical battery cells 11 is 32, and the 32 cylindrical battery cells 11 are arranged in a four-row and eight-column matrix. At the same time, the spacing between two adjacent cylindrical battery cells 11 is 3 mm. In other equivalent embodiments, the spacing between battery cells can be limited to between 2 and 4 mm to meet the electrical clearance safety requirements of the battery cells.

[0066] For another example Figure 6 or Figure 7 As shown, a plurality of series-parallel aluminum bars 21 for series-parallel connection of the cylindrical battery cells 11 are provided on both the upper and lower wire harness isolation plates 2, and a pair of input / output pole aluminum bars 22 are led out from one of the wire harness isolation plates 2. In this embodiment, taking the upper wire harness isolation plate 2 leading out a pair of input / output pole aluminum bars 22 as an example, that is, as Figure 6 or Figure 2 shown. The input / output pole aluminum bar 22 is also connected to the BMS module 3 for control to achieve precise control of the charging and discharging of the battery pack 1. At the same time, the input / output pole aluminum bar 22 can also be connected to other devices to achieve the input (charging the battery pack 1) and output (powering user devices) of electric energy.

[0067] Among them, the cylindrical battery cells 11 are connected in parallel in pairs through the series-parallel aluminum bars 21 to form a group of battery cells, and then multiple groups of battery cells are connected in series through the series-parallel aluminum bars 21 in turn to form the battery pack 1, that is, the battery cells are connected in parallel in pairs first, and then the connected battery cell groups are connected in series, which can ensure the capacity and performance requirements of the battery pack 1. In this embodiment, 32 cylindrical battery cells 11 are arranged in a four-row and eight-column matrix. Therefore, the cylindrical battery cells 11 in the column direction are connected in parallel in pairs to form a group of battery cells, and finally a battery pack 1 with 2 parallel and 16 series connections is formed. In this embodiment, the cylindrical battery cells 11 with a specification of 23 Ah 3.2 V are used, and finally the overall layout of 2 parallel and 16 series connections is achieved, thereby obtaining a battery module of 46 Ah 51.2 V to meet the requirements of the most common electrical systems, so that it can be applied to most electrical systems, achieve wide promotion, and at the same time shorten the design cycle and reduce the R & D cost.

[0068] That is, in this embodiment, the battery cells constituting the battery pack 1 are cylindrical battery cells 11 and are symmetrically arranged in a matrix manner, and cooperate with the series-parallel aluminum bars 21 and the output pole aluminum bars to realize the series-parallel connection of the cylindrical battery cells 11 into the battery pack 1 to meet the energy storage and power supply requirements. The overall battery module has a compact and symmetrical size, meets the requirements of various installation conditions inside the electrical box. At the same time, in order to improve the performance of the battery module, the BMS module 3 is added to manage each battery cell, effectively improving the performance of the energy storage battery.

[0069] In addition, in this embodiment, for another example Figure 1 as shown, the BMS module 3 further includes a soft aluminum bar 34 and a BMS fixing plate 31. Among them, the BMS fixing plate 31 is fixed by such as Figure 3 and Figure 5The M3 insert nut set as shown is locked on the same side of the two wire harness isolation plates 2, and then the BMS module 3 is detachably locked on the side of the BMS fixing plate 31 facing away from the battery pack 1 through ordinary screws. At the same time, in order to connect the input / output pole aluminum bar 22 on the upper wire harness isolation plate 2 or the lower wire harness isolation plate 2 (taking the upper wire harness isolation plate 2 as an example in this embodiment) to the BMS module 3 mounted on the side of the battery pack 1, a soft aluminum bar 34 needs to be added. One end of the soft aluminum bar 34 is connected to the BMS positive terminal 36 in the input / output terminal of the BMS module 3, and the other end is connected to the aluminum bar negative terminal 222 in the input / output pole aluminum bar 22 through a locking bolt, enabling the BMS module 3 to be powered on and work under the power supply of the battery pack 1; while the remaining aluminum bar positive terminal 221 in the input / output aluminum bar and the remaining BMS negative terminal 35 in the input / output terminal of the BMS module 3 can be used as the positive and negative input / output of the entire energy storage battery module, connected to an external power supply to charge and store energy for the battery pack 1, and connected to an external electrical load to supply power to the external electrical load.

[0070] Please refer to Figure 4 and Figure 5 , Embodiment 2 of the present invention is:

[0071] A symmetric distributed integrated energy storage battery module. On the basis of the above Embodiment 1, in this embodiment, as Figure 5 shown, on the side of the wire harness isolation plate 2 facing the battery pack 1, there are cell fixing grooves 24 corresponding to the number and positions of the cylindrical cells 11 one by one; and both ends of the cylindrical cells 11 are respectively embedded into the cell fixing grooves 24 of the upper and lower wire harness isolation plates 2, and a pole column slot 241 for exposing the pole columns of the cylindrical cells 11 is provided in the cell fixing grooves 24.

[0072] At the same time, as Figure 4 shown, on the side of the wire harness isolation plate 2 away from the battery pack 1, there is an aluminum bar fixing groove 23 for placing the series-parallel aluminum bar 21 and the input / output pole aluminum bar 22. In this embodiment, the pole column slot 241 leads to the aluminum bar fixing groove 23, and the series-parallel aluminum bar 21 and the input / output pole aluminum bar 22 are in contact with the pole columns of the cylindrical cells 11 through being installed in the aluminum bar fixing groove 23 to achieve the series-parallel connection and total input / output of the cylindrical cells 11.

[0073] That is, in this embodiment, cell fixing grooves 24 for fixing the upper and lower ends of the cylindrical cells 11 are provided on the upper two wire harness isolation plates 2, acting as a bracket for cell grouping to ensure the structural stability of the overall battery pack 1; at the same time, on the side of the wire harness isolation plate 2 away from the battery pack 1, an aluminum bar fixing groove 23 for placing the series-parallel aluminum bar 21 and the input / output pole aluminum bar 22 is provided to achieve the front-back, left-right limiting of the aluminum bar and prevent the aluminum bar from falling off, further improving the structural stability of the battery pack 1.

[0074] Please refer to Figure 1 and Figure 8 , Embodiment 3 of the present invention is as follows:

[0075] A symmetric distributed integrated energy storage battery module. Based on Embodiment 1 or Embodiment 2 above, in this embodiment, as Figure 8 shown, cell state sampling lines 25 are fixedly connected to both the series-parallel aluminum bars 21 and the output pole aluminum bars by dispensing glue. And the cell state sampling lines 25 on the upper and lower wire harness isolation plates 2 are routed through the gaps between the aluminum bar fixing grooves 23, and are respectively aggregated into an upper wire harness sampling bus 26 and a lower wire harness sampling bus 27 and then connected to the BMS module 3, that is, as Figure 1 shown.

[0076] That is, in this embodiment, the aluminum bar fixing grooves 23 are not only used to place and fix the aluminum bars, but the gaps between the respective aluminum bar fixing grooves 23 can also be used for routing the sampling lines connected to the aluminum bars in contact with each cylindrical cell 11 by dispensing glue, planning the routing layout of the sampling lines, so that the BMS module 3 can realize the state acquisition and performance monitoring of each cell, and improve the overall performance of the battery pack 1.

[0077] At the same time, in this embodiment, again as Figure 1 shown, the BMS module 3 further includes a transfer wire harness 32. One end of the upper wire harness sampling bus 26 and the lower wire harness sampling bus 27 are both connected to one end of the transfer wire harness 32, and the other end of the transfer wire harness 32 is a multi-way branch line 33 with the same number as the cell state sampling lines 25. The multi-way branch lines 33 respectively connect the multi-way cell state sampling lines 25 to the I / O ports of the BMS chip in the BMS module 3. That is, after the single cell state sampling lines 25 of each cell are routed and aggregated into one sampling bus, the whole is connected to the BMS module 3. In order to realize the individual management of each cell by the BMS module 3, a transfer wire harness 32 is added to divide the aggregated sampling bus into multi-way branch lines 33 corresponding to each cell state sampling line 25 and connect them to the respective I / O pins of the BMS chip, so that the BMS module 3 can monitor the state of each cell in real time and improve the performance of the battery pack 1.

[0078] Please refer to Figure 1 , Figure 4 and Figure 5 , Figures 9 to 11 , Embodiment 4 of the present invention is as follows:

[0079] A symmetric distributed integrated energy storage battery module. Based on any one of Embodiments 1 to 3 above, in this embodiment, as Figure 1 shown, it further includes an insulating sheet 4. The insulating sheet 4 is in two pieces and is respectively locked on one side of the two wire harness isolation plates 2 away from the battery pack 1 by plastic rivets.

[0080] That is, in this embodiment, the insulating sheet 4 can achieve overall protection of the battery pack 1, isolate the wiring harness separator 2 from contacting the outside world, and effectively avoid the short - circuit risk caused by the aluminum busbar and sampling wire on the wiring harness separator 2 contacting the outside.

[0081] In addition, as Figure 4 shown, a plurality of through - transverse through - holes 28 are correspondingly arranged on the front and rear sides of the wiring harness separator 2; at the same time, in combination with Figure 5 shown, a plurality of through - longitudinal through - holes 29 are correspondingly arranged in the middle of the upper and lower wiring harness separators 2 along the axial direction of the cylindrical battery cells 11; in this embodiment, both the transverse through - holes 28 and the longitudinal through - holes 29 are used for long screws to pass through, so as to realize the transverse installation of the overall battery module as Figure 9 shown and the longitudinal installation as Figure 10 shown in the electrical box; in this embodiment, the long screws used for longitudinal installation or transverse installation can be locked on the wiring harness separator 2 through M5 insert nuts.

[0082] In addition, in order to ensure the structural stability after the upper and lower wiring harness separators 2 and the middle battery pack 1 are grouped, as Figure 11 shown, a number of countersunk holes 20 for long screws to pass through are also correspondingly opened on the upper and lower wiring harness separators 2. The layout and quantity of the countersunk holes 20 can be set according to actual needs. In this embodiment, taking 10 countersunk holes 20, two in the middle of the whole battery module, two in the front, two in the back, and two on the left and right respectively as an example, the long screws pass through the countersunk holes 20 to lock the upper wiring harness separator 2, the battery pack 1 and the lower wiring harness separator 2 into a stable overall structure. The long screws used to lock the upper wiring harness separator 2, the battery pack 1 and the lower wiring harness separator 2 into one body can be locked on one - side wiring harness separator 2 through insert blind - hole nuts.

[0083] In summary, a symmetrically distributed and integrated energy - storage battery module provided by the present invention has the following beneficial effects:

[0084] 1. The cylindrical battery cells forming the battery pack are arranged in a matrix - symmetric pattern, so that the overall layout and size of the machine meet the requirements of various installation conditions inside the electrical box;

[0085] 2. The overall battery module can be horizontally / vertically installed in the electrical box, improving the versatility of the battery module, facilitating the wide promotion and application of the 2P16S battery module, shortening the design cycle and reducing the R & D cost at the same time;

[0086] 3. The series - parallel aluminum busbars and the input / output pole aluminum busbars are limited by the aluminum - busbar fixing grooves, making the arrangement of the aluminum busbars more compact, and improving the stability and safety of the overall battery module at the same time;

[0087] 4. The layout solution with a cell gap of 2 to 4 mm enables the overall battery module to meet various safety certification requirements, and the overall layout of the module is more regular.

[0088] The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in the related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A symmetric distributed integrated energy storage battery module, characterized in that, It includes a battery pack, a wire harness isolation plate respectively assembled at the upper and lower ends of the battery pack, and a BMS module on one side; The battery pack consists of 2 n vertically arranged cylindrical battery cells distributed in a matrix, where n is a positive integer greater than or equal to 2; A plurality of series-parallel aluminum bars for series-parallel connection of the cylindrical battery cells are arranged on both the upper and lower wire harness isolation plates, and a pair of input / output pole aluminum bars are led out from one of the wire harness isolation plates, and the input / output pole aluminum bars are also connected to the BMS module for control; The distance between two adjacent cylindrical battery cells is 2-4 mm; The cylindrical battery cells are connected in parallel in pairs through the series-parallel aluminum bars to form a group of battery cells; Multiple groups of the battery cell groups are connected in series through the series-parallel aluminum bars in sequence to form the battery pack; On the side of the wire harness isolation plate facing the battery pack, there are battery cell fixing grooves corresponding to the number and positions of the cylindrical battery cells one by one; Both ends of the cylindrical battery cell are respectively embedded into the battery cell fixing grooves of the upper and lower wire harness isolation plates, and a pole post slot for exposing the pole post of the cylindrical battery cell is opened in the battery cell fixing groove; On the side of the wire harness isolation plate away from the battery pack, there are aluminum bar fixing grooves for placing the series-parallel aluminum bars and the input / output pole aluminum bars, and the pole post slot leads to the aluminum bar fixing groove. The series-parallel aluminum bars and the input / output pole aluminum bars are in contact with the pole posts of the cylindrical battery cells installed in the aluminum bar fixing grooves to realize the series-parallel connection and total input / output of the cylindrical battery cells; The BMS module further includes a transfer wire harness.

2. The symmetrical distributed integrated energy storage battery module according to claim 1, characterized in that The cylindrical battery cell is a 23Ah 3.2V battery cell, and the number of the cylindrical battery cells is 32; The 32 cylindrical battery cells are arranged in a four-row and eight-column matrix, and the cylindrical battery cells in the column-up direction are in pairs as a group of battery cells, and finally a battery pack of 2 parallel and 16 series is formed.

3. A symmetric distributed integrated energy storage battery module according to claim 1, characterized in that, On both the series-parallel aluminum bars and the input / output pole aluminum bars, there are battery cell state sampling wires fixedly connected by dispensing; The battery cell state sampling wires on the upper and lower wire harness isolation plates are routed through the gaps between the aluminum bar fixing grooves, and are respectively aggregated into an upper wire harness sampling bus and a lower wire harness sampling bus and then connected to the BMS module; 4. A symmetric distributed integrated energy storage battery module according to claim 3, characterized in that, The upper wire harness sampling bus and the lower wire harness sampling bus are connected to one end of the transfer wire harness. The other end of the transfer wire harness is a multi-way branch line with the same number as the battery cell state sampling wires. The multi-way branch lines respectively connect the multi-way battery cell state sampling wires to the I / O ports of the BMS chip in the BMS module; 5. A symmetric distributed integrated energy storage battery module according to claim 1, wherein, The BMS module further includes a flexible aluminum bar; One end of the flexible aluminum bar is connected to the BMS positive terminal in the input / output terminal of the BMS module, and the other end is connected to the aluminum bar negative terminal in the input / output pole aluminum bar through a locking bolt; 6. A symmetric distributed integrated energy storage battery module according to claim 5, characterized in that, The BMS module further includes a BMS fixing plate; The BMS fixing plate is locked at the same side of the two wire harness isolation plates through an M3 insert nut; The BMS module is detachably locked on the side of the BMS fixing plate facing away from the battery pack through screws. The BMS positive terminal and the BMS negative terminal are both arranged on the BMS fixing plate; 7. A symmetric distributed integrated energy storage battery module according to claim 1, characterized in that, It further includes an insulating sheet; There are two insulating sheets, which are respectively locked on one side of the two wire harness separation plates away from the battery pack by plastic rivets.

8. A symmetric distributed integrated energy storage battery module according to claim 1, characterized in that, A plurality of through transverse through holes are correspondingly arranged on the front and rear sides of the wire harness separation plate; A plurality of through longitudinal through holes are correspondingly arranged in the middle of the upper and lower wire harness separation plates along the axial direction of the cylindrical battery cell; The transverse through holes and the longitudinal through holes are for long screws to pass through.

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