Energy storage device

Abstract

The utility model discloses an energy storage device, and belongs to the technical field of energy storage, the energy storage device comprises an energy storage module composed of a plurality of battery cells, a support frame used for bearing a data sampling plate is arranged above the energy storage module, the data sampling plate is used for collecting operation data of the plurality of battery cells, the data sampling board is provided with a BMU chip used for regulating and controlling the operation data of the battery cell. According to the energy storage device, the BMU chip is equivalent to be directly integrated on the energy storage module, so that the energy storage module and the BMU chip form an integral structure, the utilization rate of the external space of the energy storage device can be improved, the maintenance cost of the energy storage device is reduced, and when the BMU chip is directly integrated on the energy storage module, the BMU chip can be directly integrated on the energy storage module. Therefore, the signal transmission distance between the BMU chip and the energy storage module can be reduced, and the control precision of the BMU chip on the energy storage module can be remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of energy storage, particularly relates to a kind of energy storage devices. BACKGROUND

[0002] As the key link of energy storage and conversion, the performance and efficiency of energy storage device are increasingly concerned by people.In the prior art, the energy storage module and BMU (Battery Management Unit) in energy storage device are usually designed as independent components, and then the energy storage module and BMU are connected through wiring harness, which not only reduces the space utilization of energy storage device, but also leads to high maintenance cost of energy storage device.Meanwhile, when BMU and energy storage module are designed as independent components, the control signal sent by BMU to energy storage module is disturbed due to long distance signal transmission between them, which seriously affects the control accuracy of BMU on energy storage module.Currently, there is no effective solution to this technical problem. SUMMARY

[0003] Therefore, the utility model aims at providing an energy storage device to solve the technical problems of low space utilization, high maintenance cost and inaccurate control of BMU on energy storage module in the prior art.The specific scheme is as follows:

[0004] To solve the above technical problems, the utility model provides an energy storage device, comprising: an energy storage module composed of multiple battery cells, a support frame for carrying a data sampling board is arranged above the energy storage module, the data sampling board is used to collect operation data of the multiple battery cells, and a BMU chip for regulating and controlling the operation data of the battery cells is arranged on the data sampling board.

[0005] Preferably, multiple BMU chips are arranged on the data sampling board, the number of BMU chips arranged on the data sampling board is equal to the number of battery cells arranged in the energy storage module, each BMU chip corresponds to one battery cell in the energy storage module, and the BMU chip is used to collect temperature, voltage, calculate internal resistance and actively balance electric quantity of the battery cell.

[0006] Preferably, multiple first explosion-proof valve safety outlets for releasing gas when the explosion-proof valve of the battery cell is opened are arranged in the central part of the support frame, reinforcing members are arranged on both sides of the central part of the support frame, multiple aluminum bar mounting grooves for carrying aluminum bars are arranged on both sides of the support frame, the aluminum bars are used to connect two adjacent battery cells in the energy storage module, aluminum bar fixing columns for fixing the aluminum bars and sampling board fixing columns for fixing the data sampling board are arranged on the support frame.

[0007] Preferably, the aluminum bars are in the shape of long strips, the central part of the aluminum bars is provided with protrusions for releasing the deformation stress of the aluminum bars, and the two sides of the aluminum bars are respectively provided with aluminum bar connecting holes for limiting the electrodes of the battery cell.

[0008] Preferably, the protrusions are in the shape of a trapezoid.

[0009] Preferably, the electrodes of the battery cell are welded on the aluminum bars through the aluminum bar connecting holes.

[0010] Preferably, the data sampling board comprises a first sampling board and a second sampling board which are connected in cooperation, the first sampling board and the second sampling board are in the shape of long strips, the central part of the first sampling board is provided with a plurality of second explosion-proof valve safety outlets for releasing gas when the explosion-proof valve of the battery cell is opened, the central part of the second sampling board is provided with a plurality of third explosion-proof valve safety outlets for releasing gas when the explosion-proof valve of the battery cell is opened, and when the first sampling board and the second sampling board are installed on the support frame, the plurality of second explosion-proof valve safety outlets provided on the first sampling board and the plurality of third explosion-proof valve safety outlets provided on the second sampling board are vertically aligned with the plurality of first explosion-proof valve safety outlets provided on the support frame one by one.

[0011] Preferably, the first sampling board is respectively provided with a first pair of plug-in connectors and a first peripheral connector on the two sides of the short side, the second sampling board is respectively provided with a second pair of plug-in connectors and a second peripheral connector on the two sides of the short side, the first sampling board and the second sampling board are connected in cooperation through the first pair of plug-in connectors and the second pair of plug-in connectors, the first peripheral connector is used for connecting the first sampling board and a first peripheral sampling board, and the second peripheral connector is used for connecting the second sampling board and a second peripheral sampling board.

[0012] Preferably, the first sampling board is respectively provided with a sampling protrusion on the two sides of the long side, the sampling protrusion is provided with the BMU chip on the side away from the support frame, the sampling protrusion is provided with a temperature sampling part on the side close to the support frame, and the sampling protrusion is provided with a first voltage sampling nickel sheet on the side away from the support frame.

[0013] Preferably, the first sampling board is provided with a second voltage sampling nickel sheet at a preset distance from the sampling protrusion, and the first voltage sampling nickel sheet and the second voltage sampling nickel sheet are located on the same side of the same battery cell.

[0014] Beneficial effects: in the energy storage device provided by the utility model, the energy storage module is composed of multiple battery cells, a support frame for bearing a data sampling plate is arranged above the energy storage module, the data sampling plate is used for collecting operation data of the multiple battery cells in the energy storage module, and a BMU chip for regulating and controlling the operation data of the battery cells is further arranged on the data sampling plate. Under this arrangement, the BMU chip is directly integrated on the energy storage module, so that the energy storage module and the BMU chip become an integral structure, which can not only improve the utilization rate of the external space of the energy storage device and reduce the maintenance cost of the energy storage device, but also reduce the signal transmission distance between the BMU chip and the energy storage module when the BMU chip is directly integrated on the energy storage module, thereby significantly improving the control accuracy of the BMU chip on the energy storage module. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model, and those skilled in the art can obtain other drawings according to the provided drawings without creating labor.

[0016] Figure 1 The structural diagram of the energy storage device provided by the embodiment of the utility model;

[0017] Figure 2 The explosion diagram of the data sampling plate and the support frame provided by the embodiment of the utility model;

[0018] Figure 3 The explosion diagram of the energy storage module and the support frame provided by the embodiment of the utility model;

[0019] Figure 4 The explosion diagram of the energy storage module, the support frame and the data sampling plate provided by the embodiment of the utility model;

[0020] Figure 5 The explosion diagram of the first sampling plate and the second sampling plate provided by the embodiment of the utility model;

[0021] Figure 6 The structure diagram of the first sampling plate on the side away from the support frame provided by the embodiment of the utility model;

[0022] Figure 7 The structure diagram of the first sampling plate on the side close to the support frame provided by the embodiment of the utility model;

[0023] Figure 8A structure diagram of a first sampling plate provided by the utility model embodiment when connecting with aluminum bar.

[0024] Figure 9 A structure diagram of four voltage sampling nickel sheets corresponding to an electric core provided by the utility model embodiment.

[0025] Reference signs:

[0026] 11 - electric core; 12 - energy storage module; 13 - support frame; 14 - data sampling plate; 15 - BMU chip; 16 - aluminum bar; 301 - first explosion-proof valve safety outlet; 302 - reinforcing part; 303 - aluminum bar mounting groove; 304 - aluminum bar fixing column; 305 - sampling plate fixing column; 161 - protrusion; 162 - aluminum bar connecting hole; 141 - first sampling plate; 142 - second sampling plate; 1411 - second explosion-proof valve safety outlet; 1421 - third explosion-proof valve safety outlet; 1412 - first mating connector; 1413 - first peripheral connector; 1422 - second mating connector; 1423 - second peripheral connector; 1414 - sampling protrusion; 1415 - temperature sampling part; 1416 - first voltage sampling nickel sheet; 1417 - second voltage sampling nickel sheet. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Please refer to Figure 1 , Figure 1 A structure diagram of an energy storage device provided by the utility model embodiment, the device comprises: an energy storage module 12 composed of a plurality of electric cores 11, a support frame 13 for bearing a data sampling plate 14 is arranged above the energy storage module 12, the data sampling plate 14 is used for collecting operation data of the plurality of electric cores 11, and a BMU chip 15 for regulating and controlling the operation data of the electric core 11 is arranged on the data sampling plate 14.

[0029] In the embodiment, an energy storage device is provided, the structural design of the energy storage device not only can improve the utilization rate of external space of the energy storage device and reduce the maintenance cost of the energy storage device, but also can reduce the signal transmission distance between the BMU chip 15 and the energy storage module 12 when the BMU chip 15 is directly integrated on the energy storage module 12, thereby the control precision of the BMU chip 15 on the energy storage module 12 can be obviously improved.

[0030] The energy storage module 12 is composed of a plurality of battery cells 11 connected in series, and a support frame 13 is arranged above the energy storage module 12, which is used to carry the data sampling board 14. The data sampling board 14 is used to collect the operation data of each battery cell 11 in the energy storage module 12, and the BMU chip 15 for regulating the operation data of the battery cell 11 is also integrated on the data sampling board 14. The BMU chip 15 has the functions of temperature collection, voltage collection, calculation of battery cell internal resistance, and active balancing of battery cell power.

[0031] It should be noted that the battery cell 11 in the energy storage module 12 is usually a lithium battery. Compared with the traditional lead-acid battery, the lithium battery can provide longer mileage, and the maintenance cost is relatively low. Moreover, the lithium battery has relatively small impact on the environment during production, use and recycling, which meets the current development requirements for green environmental protection.

[0032] Since the support frame 13 arranged above the energy storage module 12 is used to carry the data sampling board 14, in actual application, the support frame 13 can be made of conductive material. The data sampling board 14 is used to collect the operation data of the plurality of battery cells 11 in the energy storage module 12. Since the energy storage module 12 usually has a size limit, the size of the data sampling board 14 arranged on the energy storage module 12 should be adjusted adaptively according to the size of the energy storage module 12. Moreover, a plurality of sampling boards can be used to jointly build the data sampling board 14.

[0033] When the BMU chip 15 for regulating the operation data of the battery cell 11 is arranged on the data sampling board 14, the BMU chip 15 is embedded in the energy storage module 12, thereby realizing the overall integrated design of the energy storage module 12 and the BMU chip 15. This can significantly reduce the space volume occupied by the energy storage device, thereby improving the energy density of the energy storage device. At the same time, when the BMU chip 15 and the energy storage module 12 are designed as a whole, the structure of the energy storage device can be simplified, the design cost of the energy storage device can be reduced, and the difficulty of maintenance of the energy storage device can be reduced.

[0034] In addition, when the energy storage module 12 and the BMU chip 15 are designed as a whole, the signal transmission path of the BMU chip 15 and the battery cell 11 in the energy storage module 12 can be shortened, thereby improving the collection speed and accuracy of the operation data of the battery cell 11 in the energy storage module 12 by the BMU chip 15, and further improving the control accuracy of the battery cell 11 in the energy storage module 12 by the BMU chip 15. Obviously, under this control mode of the BMU chip 15, the operating temperature of each battery cell 11 in the energy storage module 12 can be more uniform, thereby improving the service life of the energy storage module 12.

[0035] In the embodiment, the energy storage module 12 is composed of a plurality of battery cells 11, and a support frame 13 for bearing a data sampling board 14 is arranged above the energy storage module 12. The data sampling board 14 is used to collect operation data of the plurality of battery cells 11 in the energy storage module 12, and a BMU chip 15 for regulating the operation data of the battery cells 11 is further arranged on the data sampling board 14. In this arrangement, the BMU chip 15 is directly integrated on the energy storage module 12, so that the energy storage module 12 and the BMU chip 15 form an integral structure. This can not only improve the utilization rate of external space of the energy storage device and reduce the maintenance cost of the energy storage device, but also reduce the signal transmission distance between the BMU chip 15 and the energy storage module 12 when the BMU chip 15 is directly integrated on the energy storage module 12, thereby significantly improving the control accuracy of the BMU chip 15 on the energy storage module 12.

[0036] Based on the above embodiment, the technical solution is further described and optimized in the embodiment. As a preferred embodiment, a plurality of BMU chips 15 are arranged on the data sampling board 14. The number of the BMU chips 15 arranged on the data sampling board 14 is equal to the number of the battery cells 11 arranged in the energy storage module 12. Each BMU chip 15 corresponds to one battery cell 11 in the energy storage module 12. The BMU chip 15 is used to collect the temperature of the battery cell, collect the voltage of the battery cell, calculate the internal resistance of the battery cell, and actively balance the electric quantity of the battery cell.

[0037] In the embodiment, a plurality of BMU chips 15 are arranged on the data sampling board 14, and the number of the BMU chips 15 arranged on the data sampling board 14 is equal to the number of the battery cells arranged in the energy storage module 12. Each BMU chip on the data sampling board 14 corresponds to one battery cell in the energy storage module 12.

[0038] Specifically, if the target battery cell corresponds to the target BMU chip, the target BMU chip can not only collect the temperature data and the voltage data of the target battery cell, but also calculate the internal resistance of the target battery cell and actively balance the electric quantity in the target battery cell.

[0039] Obviously, by using the technical solution provided in the embodiment, one BMU chip can be used to manage one battery cell in the energy storage module, so that one-cell management of the energy storage module can be realized. Please refer to Figure 2 and Figure 3 , Figure 2 An exploded view of the data sampling board and the support frame provided in the embodiment of the utility model. Figure 3 An exploded view of the energy storage module and the support frame provided in the embodiment of the utility model.

[0040] As a preferred embodiment, the central part of the support frame 13 is provided with a plurality of first explosion-proof valve safety outlets 301 for releasing gas when the explosion-proof valve 112 of the battery cell 11 is opened, the two sides of the central part of the support frame 13 are provided with reinforcing members 302, and the two sides of the support frame 13 are respectively provided with a plurality of aluminum bar mounting grooves 303 for bearing the aluminum bar 16, the aluminum bar 16 is used to connect two adjacent battery cells 11 in the energy storage module, and the support frame 13 is provided with an aluminum bar fixing column 304 for fixing the aluminum bar 16 and a sampling plate fixing column 305 for fixing the data sampling plate 14.

[0041] In this embodiment, in order to improve the safety of the energy storage device during use, a plurality of first explosion-proof valve safety outlets 301 are further arranged on the central part of the support frame 13, and the first explosion-proof valve safety outlets 301 are used to release the gas discharged from the inside of the battery cell 11 when the explosion-proof valve 112 of the battery cell 11 in the energy storage module 12 is opened.

[0042] In addition, reinforcing members 302 are further arranged on the two sides of the central part of the support frame 13 to improve the support strength of the support frame 13. In actual application, the reinforcing members 302 can be arranged as reinforcing ribs or reinforcing grooves.

[0043] A plurality of aluminum bar mounting grooves 303 are arranged on the two sides of the support frame 13 for bearing the aluminum bar 16. The aluminum bar 16 is used to connect two adjacent battery cells 11 in the energy storage module 12. Meanwhile, the support frame 13 is further provided with an aluminum bar fixing column 304 for fixing the aluminum bar 16 and a sampling plate fixing column 305 for fixing the data sampling plate, and the aluminum bar 16 and the data sampling plate 14 can be fixed on the support frame 13 through the aluminum bar fixing column 304 and the sampling fixing column 305, so that the data sampling plate 14 and the energy storage module 12 can be fixed and connected together through the support frame 13.

[0044] Please continue to see Figure 2 As a preferred embodiment, the aluminum bar 16 is in a strip shape, the central part of the aluminum bar 16 is provided with a protrusion 161 for releasing the stress corresponding to the deformation of the aluminum bar, and the two sides of the aluminum bar 16 are respectively provided with aluminum bar connecting holes 162 for limiting the electrodes of the battery cell.

[0045] In this embodiment, the aluminum bar 16 is used to connect two adjacent battery cells 11 in the energy storage module 12. The aluminum bar 16 is in a strip shape, and the central part of the aluminum bar 16 is provided with a protrusion 161 for releasing the stress corresponding to the deformation of the aluminum bar.

[0046] Specifically, the protrusion 161 can be arranged as a trapezoidal protrusion, because the trapezoidal protrusion is more easily deformed when stressed, which can further improve the safety and reliability of the aluminum bar in actual use.

[0047] In addition, the aluminum bar 16 is provided with aluminum bar connecting holes 162 on both sides, and the aluminum bar 16 can be welded on the electrode 111 of the battery cell 11 through the aluminum bar connecting holes 162, so that the aluminum bar 16 is fixed on the adjacent two battery cells 11 in the energy storage module 12 by means of hot riveting, thereby realizing the stable connection of the aluminum bar 16 and the battery cell 11 in the energy storage module 12. Moreover, when the aluminum bar 16 and the adjacent two battery cells 11 in the energy storage module 12 are fixed, the support frame 13 is also pressed and fixed on the energy storage module 12.

[0048] Please refer to Figure 4 and Figure 5 , Figure 4 An exploded view of the energy storage module, the support frame and the data sampling plate provided by the embodiment of the utility model. Figure 5 An exploded view of the first sampling plate and the second sampling plate provided by the embodiment of the utility model.

[0049] As a preferred embodiment, the data sampling plate 14 comprises a first sampling plate 141 and a second sampling plate 142 which are connected in cooperation, the first sampling plate 141 and the second sampling plate 142 are both in the shape of a long strip, the central part of the first sampling plate 141 is provided with a plurality of second explosion-proof valve safety outlets 1411 for releasing gas when the explosion-proof valve of the battery cell 11 is opened, the central part of the second sampling plate 142 is provided with a plurality of third explosion-proof valve safety outlets 1421 for releasing gas when the explosion-proof valve of the battery cell 11 is opened, and when the first sampling plate 141 and the second sampling plate 142 are installed on the support frame 13, the plurality of second explosion-proof valve safety outlets 1411 provided on the first sampling plate 141 and the plurality of third explosion-proof valve safety outlets 1421 provided on the second sampling plate 142 are vertically aligned with the plurality of first explosion-proof valve safety outlets 301 provided on the support frame 13 one by one.

[0050] In actual application, the number of battery cells 11 in the energy storage module 12 can be even or odd. When the number of battery cells 11 in the energy storage module 12 is odd, the size of a whole data sampling plate 14 can not meet the requirement of covering the energy storage module 12. At this time, the data sampling plate 14 can be set as a first sampling plate 141 and a second sampling plate 142 which are connected in cooperation. For example, if there are 9 battery cells 11 in the energy storage module 12, the first sampling plate 141 can correspond to 5 battery cells 11 in the energy storage module 12, and the second sampling plate 142 can correspond to 4 battery cells 11 in the energy storage module 12, so that the first sampling plate 141 and the second sampling plate 142 in different combinations can be used to adapt to the energy storage module 12 provided with different number of battery cells 11.

[0051] The first sampling plate 141 and the second sampling plate 142 are both in the shape of a long strip. The central part of the first sampling plate 141 is provided with a plurality of second explosion-proof valve safety outlets 1411, which are used to release gas when the explosion-proof valve of the battery cell 11 is opened, and are used to ensure the safe operation of the energy storage module 12. Similarly, the central part of the second sampling plate 142 is also provided with a plurality of third explosion-proof valve safety outlets 1421.

[0052] When the first sampling plate 141 and the second sampling plate 142 are installed on the support frame 13, the plurality of second explosion-proof valve safety outlets 1411 provided on the first sampling plate 141 and the plurality of third explosion-proof valve safety outlets 1421 provided on the second sampling plate 142 are aligned with the plurality of first explosion-proof valve safety outlets 301 provided on the support frame 13 in the vertical direction. In this way, when the explosion-proof valve of a certain battery cell 11 in the energy storage module 12 is opened, the gas released by the battery cell 11 can be discharged through the first explosion-proof valve safety outlets 301 provided on the support frame 13, the second explosion-proof valve safety outlets 1411 provided on the first sampling plate 141, and the third explosion-proof valve safety outlets 1421 provided on the second sampling plate 142. Therefore, the safe and stable operation of the energy storage device can be ensured.

[0053] Please continue to refer to Figure 4 and Figure 5 As a preferred embodiment, the first sampling plate 141 is provided with a first pair of plug-in connectors 1412 and a first peripheral connector 1413 on both sides of the short side, the second sampling plate 142 is provided with a second pair of plug-in connectors 1422 and a second peripheral connector 1423 on both sides of the short side, the first sampling plate 141 and the second sampling plate 142 are connected through the first pair of plug-in connectors 1412 and the second pair of plug-in connectors 1422, the first peripheral connector 1413 is used to connect the first sampling plate 141 and the first peripheral sampling plate, and the second peripheral connector 1423 is used to connect the second sampling plate 142 and the second peripheral sampling plate.

[0054] In this embodiment, the first sampling plate 141 and the second sampling plate 142 are connected through the first pair of plug-in connectors 1412 and the second pair of plug-in connectors 1422. The first peripheral connector 1413 on the first sampling plate 141 is used to connect the first sampling plate 141 and the first peripheral sampling plate, and the second peripheral connector 1423 on the second sampling plate 142 is used to connect the second sampling plate 142 and the second peripheral sampling plate. That is, the physical connection between the entire data sampling plate and other data sampling plates in the energy storage device can be achieved through the first peripheral connector 1413 on the first sampling plate 141 and the second peripheral connector 1423 on the second sampling plate 142, so that the series connection of a plurality of data sampling plates can be achieved.

[0055] It should be noted that in actual application, the number of the first pair of plug-in connectors 1412 and the first peripheral connectors 1413 arranged on the first sampling board 141 can be one or multiple. The number of the second pair of plug-in connectors 1422 and the second peripheral connectors 1423 arranged on the second sampling board 142 can be one or multiple. However, the number of the first pair of plug-in connectors 1412 arranged on the first sampling board 141 should be equal to the number of the second pair of plug-in connectors 1422 arranged on the second sampling board 142, and the number of the first peripheral connectors 1413 arranged on the first sampling board 141 should be equal to the number of the second peripheral connectors 1423 arranged on the second sampling board 142. The difference between the first sampling board 141 and the second sampling board 142 is only the difference in the connection positions of the plug-in connectors and the peripheral connectors and the difference between the male and the female.

[0056] Please refer to Figures 6 to 8 , Figure 6 The structure diagram of the first sampling board provided by the embodiment of the utility model on the side far from the support frame, Figure 7 The structure diagram of the first sampling board provided by the embodiment of the utility model on the side close to the support frame. Figure 8 The structure diagram of the first sampling board when connected with the aluminum bar provided by the embodiment of the utility model.

[0057] As a preferred embodiment, the first sampling board 141 is provided with sampling protrusions 1414 on both sides of the long side, the side of the sampling protrusions 1414 far from the support frame 13 is provided with a BMU chip 15, the side of the sampling protrusions 1414 close to the support frame 13 is provided with a temperature sampling part 1415, and the side of the sampling protrusions 1414 far from the support frame 13 is provided with a first voltage sampling nickel sheet 1416.

[0058] In the embodiment, the first sampling board 141 is provided with sampling protrusions 1414 on both sides of the long side, the side of the sampling protrusions 1414 far from the support frame 13 is provided with a BMU chip 15, and the side close to the support frame 13 is provided with a temperature sampling part 1415. Each of the battery cells 11 in the energy storage module 12 corresponds to one BMU chip 15, and the BMU chip 15 is used to collect the operation data of the battery cell 11 in the energy storage module 12. Specifically, if a target battery cell corresponds to a target BMU chip, the target BMU chip is arranged on the sampling protrusion corresponding to the aluminum bar welded at the negative electrode end of the target battery cell.

[0059] Since the temperature sampling part 1415 is arranged on the side close to the support frame 13 and adheres to the battery cell 11 in the energy storage module 12, the temperature sampling part 1415 can accurately collect the temperature data of the battery cell 11 in the energy storage module 12.

[0060] In addition, the sampling protrusion 1414 is provided with a first voltage sampling nickel sheet 1416 on the side away from the support frame 13, that is, the first voltage sampling nickel sheet 1416 is arranged on the front side of the sampling protrusion 1414. The first voltage sampling nickel sheet 1416 is used to collect the voltage data of the battery cell 11 in the energy storage module 12.

[0061] As a preferred embodiment, the first sampling plate 141 is provided with a second voltage sampling nickel sheet 1417 at a preset distance from the sampling protrusion 1414, and the first voltage sampling nickel sheet 1416 and the second voltage sampling nickel sheet 1417 are located on the same side of the same battery cell.

[0062] In this embodiment, the first sampling plate 141 is also provided with a second voltage sampling nickel sheet 1417 at a preset distance from the sampling protrusion 1414, and the first voltage sampling nickel sheet 1416 and the second voltage sampling nickel sheet 1417 are located on the same side of the same battery cell.

[0063] That is, two voltage sampling nickel sheets (the first voltage sampling nickel sheet 1416 and the second voltage sampling nickel sheet 1417) are arranged on the same side of the same battery cell, and two voltage sampling nickel sheets (the first voltage sampling nickel sheet 1416 and the second voltage sampling nickel sheet 1417) are arranged on the other side of the same battery cell. Then, four voltage sampling nickel sheets are arranged for the same battery cell, please refer to Figure 9 , Figure 9 The structure diagram of the four voltage sampling nickel sheets arranged for the same battery cell is provided in the embodiment of the utility model.

[0064] Obviously, the operation data of the battery cell collected by the four voltage sampling nickel sheets can be mutually corrected, so as to ensure the accuracy and reliability of the collected voltage operation data, and prevent the problem of inaccurate sampling data caused by signal interference and failure of a voltage sampling nickel sheet.

[0065] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An energy storage device, characterized by, The application relates to an energy storage module (12) composed of a plurality of battery cells (11), wherein a support frame (13) for bearing a data sampling board (14) is arranged above the energy storage module (12), the data sampling board (14) is used for collecting operation data of the plurality of battery cells (11), and a BMU chip (15) for regulating the operation data of the battery cells (11) is arranged on the data sampling board (14). A plurality of BMU chips (15) are arranged on the data sampling board (14), the number of the BMU chips (15) arranged on the data sampling board (14) is equal to the number of the battery cells (11) arranged in the energy storage module (12), each BMU chip (15) corresponds to one battery cell (11) in the energy storage module (12), and the BMU chip (15) is used for realizing temperature collection, voltage collection, internal resistance calculation and active equalization of the battery cells (11).

2. An energy storage device according to claim 1, wherein, A plurality of first explosion-proof valve safety outlets (301) for releasing gas when explosion-proof valves of the battery cells (11) are opened are arranged in the central part of the support frame (13), reinforcing members (302) are arranged on both sides of the central part of the support frame (13), a plurality of aluminum bar mounting grooves (303) for bearing aluminum bars (16) are arranged on both sides of the support frame (13), the aluminum bars are used for connecting two adjacent battery cells (11) in the energy storage module (12), aluminum bar fixing columns (304) for fixing the aluminum bars (16) and a sampling board fixing column (305) for fixing the data sampling board (14) are arranged on the support frame (13).

3. An energy storage device according to claim 2, wherein, The aluminum bar (16) is in a strip shape, a protrusion (161) for releasing deformation stress of the aluminum bar (16) is arranged in the central part of the aluminum bar (16), and aluminum bar connecting holes (162) for limiting electrodes of the battery cells (11) are arranged on both sides of the aluminum bar (16).

4. An energy storage device according to claim 3, wherein, The protrusion (161) is in a trapezoidal shape.

5. An energy storage device according to claim 4, wherein, The electrodes of the battery cells (11) are welded on the aluminum bar (16) through the aluminum bar connecting holes (162).

6. An energy storage device according to claim 4, wherein, ​ 7. The energy storage device of claim 3, wherein, The data sampling plate (14) comprises a first sampling plate (141) and a second sampling plate (142) connected together, the first sampling plate (141) and the second sampling plate (142) are both in the shape of a long strip, the central part of the first sampling plate (141) is provided with a plurality of second explosion-proof valve safety outlets (1411) for releasing gas when the explosion-proof valve of the battery cell (11) is opened, the central part of the second sampling plate (142) is provided with a plurality of third explosion-proof valve safety outlets (1421) for releasing gas when the explosion-proof valve of the battery cell (11) is opened, and when the first sampling plate (141) and the second sampling plate (142) are installed on the support frame (13), the plurality of second explosion-proof valve safety outlets (1411) provided on the first sampling plate (141) and the plurality of third explosion-proof valve safety outlets (1421) provided on the second sampling plate (142) are vertically aligned with the plurality of first explosion-proof valve safety outlets (301) provided on the support frame (13) one by one.

8. An energy storage device according to claim 7, wherein, The first sampling plate (141) is provided with a first pair of plug connectors (1412) and a first peripheral connector (1413) on both sides of the short side, the second sampling plate (142) is provided with a second pair of plug connectors (1422) and a second peripheral connector (1423) on both sides of the short side, the first sampling plate (141) and the second sampling plate (142) are connected together through the first pair of plug connectors (1412) and the second pair of plug connectors (1422), the first peripheral connector (1413) is used to connect the first sampling plate (141) and a first peripheral sampling plate, and the second peripheral connector (1423) is used to connect the second sampling plate (142) and a second peripheral sampling plate.

9. The energy storage device of claim 7, wherein, The first sampling plate (141) is provided with a sampling protrusion (1414) on both sides of the long side, the side of the sampling protrusion (1414) away from the support frame (13) is provided with the BMU chip (15), the side of the sampling protrusion (1414) close to the support frame (13) is provided with a temperature sampling part (1415), and the side of the sampling protrusion (1414) away from the support frame (13) is provided with a first voltage sampling nickel sheet (1416).

10. The energy storage device of claim 9, wherein, The first sampling plate (141) is provided with a second voltage sampling nickel sheet (1417) at a preset distance from the sampling protrusion (1414), and the first voltage sampling nickel sheet (1416) and the second voltage sampling nickel sheet (1417) are located on the same side of the same battery cell (11).

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