Battery pack acquisition system and energy storage equipment

Abstract

The utility model relates to a battery pack acquisition system and energy storage equipment, comprising a box body, at least two battery modules are arranged in the box body, and a plurality of battery cells are connected in series in each battery module; the plurality of signal acquisition assemblies are used for detecting battery cell signals of the battery module and are connected with the battery cells; the two ends of each connecting bar are electrically connected to the adjacent battery cells respectively, and the adjacent connecting bars are connected through a first circuit on the acquisition circuit board; and the input end of the host is connected with the electric connecting piece. By means of the arrangement, transmission of collected signals is carried out by means of the connecting bar and the circuit board circuit, no extra signal collection assembly circuit needs to be configured, manufacturing procedures can be reduced, and the stability of the battery pack can be improved.

Description

Technical Field

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

[0002] In the current power battery system, the battery module is responsible for providing energy for the load. Since the power battery needs to be charged and discharged frequently during use, it is necessary to collect the temperature / voltage of the battery cells of the battery module through a battery acquisition system to monitor the working condition of the battery module.

[0003] When using the above battery acquisition system, since most of the signal sampling of the current battery pack uses wire harness connection, one end of the wire harness is connected and welded to the bus bar of the battery cell, the other end is merged into the connector, and then connected to the controller through the connector. The wire harness is routed and fixed in the module. It is necessary to prevent errors between the wire harnesses of different modules. Since the lengths of the wire harnesses are different due to different module positions, it is difficult to achieve automated and integrated production, the production efficiency is not high, and too many wire harnesses will also cause the problem of poor stability of the battery pack. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problems in the prior art that most of the signal sampling of the battery pack uses wire harness connection, resulting in low production efficiency and too many wire harnesses also causing poor stability of the battery pack, thereby providing a battery pack acquisition system and an energy storage device.

[0005] To solve the above technical problem, the utility model provides a battery pack acquisition system, including:

[0006] A box body, in which at least two battery modules are arranged. A plurality of battery cells are connected in series in each battery module. At least two of the battery modules are connected in series in sequence and are respectively electrically connected to a collection circuit board, and the collection circuit board is provided with an electrical connection member;

[0007] A plurality of signal acquisition components, which are used to detect the cell signals of the battery module and are connected to the battery cells;

[0008] A plurality of connection rows, the two ends of which are respectively electrically connected to adjacent battery cells, and the signal acquisition components are connected to the connection rows through metal sheets. Adjacent connection rows are connected by a first circuit on the collection circuit board, and the connection row at the end of the battery module is connected to the electrical connection member through a second circuit on the collection circuit board;

[0009] A host, the input end of which is connected to the electrical connection member.

[0010] In an embodiment of the utility model, the metal sheet is a nickel sheet, the connection row is a connecting aluminum row, and the end of the nickel sheet is welded to the aluminum row and the circuit board.

[0011] In an embodiment of the present utility model, the connection row is provided with welding positioning holes.

[0012] In an embodiment of the present utility model, adjacent battery modules are connected in series through a copper row assembly.

[0013] In an embodiment of the present utility model, a positive copper row and a negative copper row that are electrically connected to each other are respectively arranged on the first sides of adjacent battery modules, and a negative copper row and a positive copper row that are electrically connected to each other are respectively arranged on the other sides. Adjacent battery modules are connected in series through the positive copper row and the negative copper row or the negative copper row and the positive copper row on the same side.

[0014] In an embodiment of the present utility model, the electrical connector is connected to the input end of the host through a wire harness.

[0015] In an embodiment of the present utility model, an insulating member is arranged between adjacent battery modules.

[0016] In an embodiment of the present utility model, each battery cell is further provided with an explosion-proof valve.

[0017] In an embodiment of the present utility model, the signal acquisition component includes a voltage acquisition member and a temperature acquisition member.

[0018] The present utility model also discloses an energy storage device, including the above-mentioned battery pack acquisition system.

[0019] The above technical solution of the present utility model has the following advantages compared with the prior art:

[0020] For the battery pack acquisition system of the present utility model, battery modules are connected in series in sequence to form an overall battery pack structure. The signals of the battery cells are detected in real time through the signal acquisition component, and the signal metal sheet, connection row and acquisition circuit board are transmitted to the electrical connector. The signals are sequentially transmitted to the electrical connector and the host through the circuits on the acquisition circuit board. The host receives the signals from each battery cell and analyzes and judges the signals, so as to master the working state of the battery pack in real time. The connection row and the acquisition circuit board are connected by a metal sheet welding method to transmit the signal through the circuit on the circuit board to the electrical connector on the circuit board. The electrical connector is connected and transmitted through a wire harness to the signal acquisition host. By adopting the connection method of the acquisition circuit board and the connection row, the product cost is greatly reduced. With the help of the connection row and the circuit board circuit, the acquisition signal is transmitted without additionally configuring the signal acquisition component circuit, which can reduce the manufacturing process and improve the stability of the battery pack. Description of the Drawings

[0021] In order to make the content of the present utility model easier to be clearly understood, the following further describes the present utility model in detail according to the specific embodiments of the present utility model and in combination with the drawings, wherein

[0022] Figure 1 is a schematic structural diagram of the acquisition system of the present utility model;

[0023] Figure 2 is the present utility model Figure 1 an enlarged view of part A in;

[0024] Figure 3 is the present utility model Figure 1 an enlarged view of part B in.

[0025] Explanation of reference numerals in the accompanying drawings of the specification: 1. Explosion-proof valve; 2. Positioning hole; 3. Box body; 4. Connection row; 5. Metal sheet; 6. Electrical connector; 7. Negative copper row; 9. Second battery module; 10. First battery module; 11. Positive copper row; 12. Host; 13. Acquisition circuit board. Detailed implementation manners

[0026] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the specific embodiments cited shall not be construed as limitations on the present utility model. Embodiment 1

[0027] Referring to Figures 1 - 3 as shown, a battery pack acquisition system of the present utility model includes:

[0028] A box body 3, in which at least two battery modules are provided, each battery module has a plurality of battery cells connected in series, at least two of the battery modules are connected in series in sequence, and are respectively electrically connected to an acquisition circuit board 13, and the acquisition circuit board 13 is provided with an electrical connector 6;

[0029] A plurality of signal acquisition components, which are used to detect the signals of the battery cells of the battery module and are connected to the battery cells;

[0030] A plurality of connection rows 4, the two ends of which are respectively electrically connected to adjacent battery cells, and the signal acquisition components are connected to the connection rows 4 through metal sheets 5, and adjacent connection rows 4 are connected through a first circuit on the acquisition circuit board 13, and the connection row 4 at the end of the battery module is connected to the electrical connector 6 through a second circuit on the acquisition circuit board 13;

[0031] A host 12, whose input end is connected to the electrical connector 6.

[0032] At least two battery modules are accommodated inside the box body 3 to form an external protection structure, and each battery module is composed of multiple series-connected battery cells. The battery modules are connected in series in sequence to form an overall battery pack structure. The signals of the battery cells are detected in real time by a signal acquisition component, and the signals are transmitted to the electrical connector 6 through the signal metal sheet 5, the connection row 4, and the acquisition circuit board 13. The sensors in the signal acquisition component are plugged into the connection row 4 through wires, which can be quickly assembled and disassembled. The signals are sequentially transmitted to the electrical connector 6 and the host 12 through the circuits on the acquisition circuit board 13. The host 12 receives the signals from each battery cell and analyzes and judges the signals by using the built-in algorithms and programs, so as to master the working state of the battery pack in real time, and control the charging and discharging process of the battery pack according to the preset rules and strategies, thereby ensuring the safe and efficient operation of the battery pack.

[0033] The metal sheet 5 is a nickel sheet, the connection row 4 is a connecting aluminum row, and the end of the nickel sheet is welded to the aluminum row and the circuit board. The nickel sheet is selected as the metal sheet 5, and the voltage is collected through the nickel sheet as a voltage acquisition terminal. The connecting aluminum row is used as the connection row 4, and the end of the nickel sheet is connected to the aluminum row and the circuit board by welding. The nickel sheet has good electrical conductivity and corrosion resistance, can stably transmit the signals of the battery cells, and reduce the loss and distortion of the signals during the transmission process. The connecting aluminum row has the characteristics of light weight, low cost, and good electrical conductivity. Welding the end of the nickel sheet to the aluminum row and the circuit board forms a firm and reliable electrical connection. The welding process ensures a low resistance at the connection part, enabling the signals to be transmitted efficiently and stably between various components. The electrical connector 6 is a module signal acquisition communication plug, which is plugged into the acquisition circuit board 13.

[0034] The connection row 4 is provided with welding positioning holes 2, whose sizes and positions match the corresponding welding points or positioning posts on the nickel sheet and the circuit board. When performing the welding operation, the nickel sheet and the connecting aluminum row are placed at the corresponding positions on the circuit board. The nickel sheet is arranged between the aluminum row and the circuit board, and the welding positioning holes 2 are aligned with the preset welding points on the circuit board. In some embodiments, the nickel sheet is provided with positioning holes 2 that are coaxial with and have the same size as the connection row 4.

[0035] Adjacent battery modules are connected in series through a copper row assembly. In this embodiment, the number of battery modules is two, including a first battery module 10 and a second battery module 9. The copper row assembly has good electrical conductivity and thermal conductivity, and is used to connect the battery modules that have aggregated multiple battery cells in series at the ends. The bottom of the box body 3 is also provided with support feet and plug connectors. The copper row assembly is electrically connected to the plug connectors. The plug connectors are provided with multiple sockets for inputting or outputting current.

[0036] On the first sides adjacent to the battery modules, a positive copper busbar 11 and a negative copper busbar 7 which are electrically connected to each other are respectively arranged, and on the other sides, a negative copper busbar 7 and a positive copper busbar 11 which are electrically connected to each other are respectively arranged. At one end of the box body 3, the adjacent battery modules are connected in series through the positive copper busbar 11 and the negative copper busbar 7 on the same side. The current flows out from the positive copper busbar 11 on one side of a battery module and flows into this module through the negative copper busbar 7 on the same side of the adjacent battery module connected thereto. At the other end of the box body 3, the current flows out from the negative copper busbar 7 on the other side of a battery module and realizes series connection through the positive copper busbar 11 of the adjacent module, so that the adjacent battery modules are connected in series in sequence to form a complete battery pack circuit.

[0037] The electrical connector 6 is connected to the input end of the host 12 through a wire harness. When the circuit board is a rigid printed circuit board, it is necessary to adapt to the internal space of the battery pack and the requirements of wiring bending through the wire harness.

[0038] Insulating parts are arranged between the adjacent battery modules. Arranging insulating parts between the adjacent battery modules can enhance the electrical insulation performance between the battery modules and improve the use safety and reliability of the battery pack.

[0039] Each battery cell is also provided with an explosion-proof valve 1 to further increase the safety of the battery module. The explosion-proof valve 1 is connected to the pad through a convex structure (the tab is welded on the pad). When the internal pressure of the battery rises to a certain level, the explosion-proof valve 1 will deform and separate from the pad, thus cutting off the current loop.

[0040] The signal acquisition component includes a voltage acquisition part and a temperature acquisition part. The voltage acquisition part adopts a voltage sensor, which can accurately measure the voltage value of the battery cells in the battery module in real time. Its design is compact and easy to install, and it is connected to the battery cells through wires or contacts to capture voltage changes. The temperature acquisition part is a temperature sensor such as a thermistor or a thermocouple, which is installed on the surface of the battery cell, the electrode connection part, etc., can quickly sense the temperature change, and can timely transmit the temperature information to the host 12. Embodiment 2

[0041] This embodiment discloses an energy storage device, including a battery pack acquisition system as described in Embodiment 1.

[0042] An energy storage device described in this embodiment. The energy storage device is equipped with an energy storage housing or an energy storage rack to protect the internal components from the external environment. The battery pack acquisition system inside it is a complete architecture including a box body 3, battery modules, an acquisition circuit board 13, signal acquisition components, a connection row 4, a host 12, etc. as described in Embodiment 1. During the energy storage process, the electric energy of an external power supply is input into the energy storage device, and the battery modules start to store electric energy. At the same time, the battery pack acquisition system monitors the state of the battery modules in real time. The voltage acquisition component and the temperature acquisition component acquire voltage data and temperature data, convert them into electrical signals and transmit them to the acquisition circuit board 13. After processing and integrating these signals, the acquisition circuit board 13 transmits the information to the host 12 through a wire harness. The host 12 adjusts the working mode and parameters of the energy storage device in real time according to the received signals. During the electric energy release process, through the monitoring and control of the battery pack acquisition system, the stability and reliability of the output electric energy are ensured. The energy storage device is also equipped with an intelligent management system and an inverter to meet the needs of different loads.

[0043] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present utility model.

Claims

1. A battery pack acquisition system, characterized in that, Comprising: A box body, at least two battery modules are arranged inside the box body, a plurality of battery cells are connected in series inside each battery module, at least two of the battery modules are connected in series in sequence, and are respectively electrically connected to a collection circuit board, and the collection circuit board is provided with an electrical connection member; A plurality of signal collection components, which are used to detect the battery cell signals of the battery modules, are connected to the battery cells, and the signal collection components include a voltage collection component and a temperature collection component; A plurality of connection rows, the two ends of which are respectively electrically connected to adjacent battery cells, and the signal collection components are connected to the connection rows through metal sheets, adjacent connection rows are connected through a first circuit on the collection circuit board, and the connection row at the end of the battery module is connected to the electrical connection member through a second circuit on the collection circuit board; positive copper rows and negative copper rows that are electrically connected to each other are respectively arranged on the first sides of adjacent battery modules, and negative copper rows and positive copper rows that are electrically connected to each other are respectively arranged on the other sides, and adjacent battery modules are connected in series through the positive copper row and the negative copper row or the negative copper row and the positive copper row on the same side; A main unit, the input end of which is connected to the electrical connection member.

2. The battery pack acquisition system according to claim 1, wherein: The metal sheet is a nickel sheet, the connection row is a connection aluminum row, and the end of the nickel sheet is welded to the aluminum row and the circuit board.

3. The battery pack acquisition system according to claim 2, characterized in that: The connection row is provided with welding positioning holes.

4. The battery pack acquisition system according to claim 1, wherein: Adjacent battery modules are connected in series through a copper row assembly.

5. A battery pack acquisition system according to claim 1, characterized in that: The electrical connection member is connected to the input end of the main unit through a wire harness.

6. The battery pack acquisition system according to claim 1, characterized in that: Insulating members are arranged between adjacent battery modules.

7. The battery pack acquisition system according to claim 1, wherein: Each battery cell is further provided with an explosion-proof valve.

8. An energy storage device, characterized in that, Including a battery pack collection system according to any one of claims 1-7.

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