Data monitoring device of battery module and battery pack

Abstract

The utility model relates to a data monitoring device of a battery module and a battery pack, the battery module comprises a plurality of battery cells arranged in sequence and a plurality of aluminum rows, each pole of the battery cells is correspondingly and electrically connected with one aluminum row, the poles on one side of two adjacent battery cells are respectively and electrically connected with two aluminum rows corresponding to the poles on one side of the two adjacent battery cells, and the poles on the other side of the two adjacent battery cells are respectively and electrically connected with the aluminum rows. The data monitoring device comprises a plurality of sensors and an acquisition module; each sensor is correspondingly arranged on one aluminum bar, and the sensors are connected in series through sampling wire harnesses so as to form a non-closed sensor chain; the acquisition module is in wireless communication connection with external equipment, the acquisition module is electrically connected with any sensor, state data acquired by each sensor is received through the sensor link, and the received state data is wirelessly transmitted to the external equipment, so that the layout of a sampling wire harness can be simplified, the battery pack space occupied by the monitoring device is reduced, and the monitoring efficiency is improved. And the sampling wire harness does not need to be led out from the battery pack, so that punching on the outer shell of the battery pack can be avoided.

Description

Technical Field

[0001] The present application relates to the field of electric energy technology, and in particular to a data monitoring device for a battery module and a battery pack. Background Art

[0002] A group of batteries connected in series, parallel or series-parallel is called a battery module. One or more battery modules are usually placed in a battery pack to provide power. During operation, the battery pack needs to monitor the temperature, voltage and internal resistance of the battery cells in the battery module. Figure 1 As shown, the existing monitoring device generally sets a sensor 12 on the aluminum bar 11 on the battery module to collect data such as temperature and voltage. Each sensor 12 transmits the collected signal to the main harness 14 through a sub-harness 13. The main harness 14 transmits the signal of the sensor 12 to the slave control module outside the battery pack through the data output interface 141. However, this method requires the layout of more harnesses, such as sub-harnesses 13 and main harnesses 14, which will occupy more space in the battery pack. Too many harnesses also affect the heat dissipation in the battery pack, and it is necessary to punch holes in the battery pack shell to lead the main harness 14 to the outside of the pack to connect with the slave control module, which affects the structural strength and sealing of the battery pack shell. Utility Model Content

[0003] Based on this, it is necessary to provide a data monitoring device and a battery pack for a battery module to address the above-mentioned technical problems, which can simplify the layout of the sampling harness, thereby helping to reduce the battery pack space occupied by the data monitoring device, and there is no need to lead the sampling harness out of the battery pack, thereby avoiding drilling holes in the battery pack outer shell.

[0004] In a first aspect, the present application provides a data monitoring device for a battery module, wherein the battery module comprises a plurality of battery cells and a plurality of aluminum bars arranged in sequence, each pole of the battery cell is electrically connected to an aluminum bar, and two aluminum bars corresponding to the poles on one side of two adjacent battery cells are electrically connected, and the data monitoring device comprises a plurality of sensors and a collection module;

[0005] Each of the sensors is correspondingly arranged on an aluminum busbar, and is used to collect status data of the battery cells electrically connected to the corresponding aluminum busbar; the sensors are connected in series through a sampling harness to form a non-closed sensor chain; the acquisition module is wirelessly connected to an external device, and the acquisition module is electrically connected to any sensor, and receives the status data collected by each sensor through the sensor chain, and wirelessly transmits the received status data to the external device.

[0006] Furthermore, the acquisition module includes a wireless communication unit, a signal collection unit, a data processing unit and a power supply unit;

[0007] The power supply unit is used to provide working voltage to the wireless communication unit, the signal collection unit and the data processing unit;

[0008] The signal collection unit is electrically connected to any sensor to receive status data collected by each sensor through the sensor chain;

[0009] The data processing unit is used to convert the state data received by the signal collection unit into at least one of voltage data, temperature data and internal resistance data of the corresponding battery cell;

[0010] The wireless communication unit is connected to the external device via wireless communication, and is used to wirelessly transmit at least one of the voltage data, temperature data and internal resistance data of each battery cell to the external device.

[0011] Furthermore, the signal collection unit is electrically connected to the sensor at one end of the sensor chain.

[0012] Furthermore, the acquisition module also includes a control unit, which is electrically connected to the sensor at the other end of the sensor chain and is used to send a start or stop control signal to each sensor.

[0013] Furthermore, the multiple battery cells arranged in sequence form a battery cell sequence, and the aluminum bars include multiple first aluminum bars electrically connected to the poles on one side of the battery cell sequence and multiple second aluminum bars electrically connected to the poles on the other side of the battery cell sequence, the sensors on two adjacent first aluminum bars are electrically connected through a sampling harness, the sensors on two adjacent second aluminum bars are electrically connected through a sampling harness, and the sensors on the first aluminum bar and the second aluminum bar located at one end of the battery cell sequence are electrically connected through a sampling harness, thereby forming a U-shaped sensor chain.

[0014] Furthermore, the acquisition module is implemented using a flexible printed circuit board.

[0015] Furthermore, the external device is a main control module of a battery management system.

[0016] In a second aspect, the present application further provides a battery pack, comprising an outer shell, a battery module and a data monitoring device arranged in the outer shell, wherein the data monitoring device is any of the data monitoring devices described above.

[0017] Furthermore, the two electrically connected aluminum bars in the battery module are integrally formed.

[0018] Furthermore, the multiple cells in the battery module are connected in parallel or in series through the aluminum bar. An electronic device includes the battery module as described above.

[0019] The above introduces a data monitoring device for a battery module, wherein the battery module includes a plurality of cells and a plurality of aluminum bars arranged in sequence, each pole of the cell is electrically connected to an aluminum bar, and the two aluminum bars corresponding to the poles on one side of two adjacent cells are electrically connected, and the data monitoring device includes a plurality of sensors and a collection module; each of the sensors is correspondingly arranged on an aluminum bar, and is used to collect the status data of the cell electrically connected to the corresponding aluminum bar; the sensors are connected in series through sampling harnesses to form a non-closed sensor chain; the collection module is wirelessly connected to an external device, and the collection module is electrically connected to any sensor, and the status data collected by each sensor is received through the sensor chain, and the received status data is wirelessly transmitted to the external device. In the above manner, it is only necessary to lay out the sampling harnesses between the sensors, and there is no need to lay out the main harness, which can simplify the layout of the sampling harnesses, and is conducive to reducing the battery pack space occupied by the monitoring device, and by sending the status data of the cell to the external device wirelessly, there is no need to lead the sampling harness out of the battery pack, and it can avoid drilling holes on the battery pack shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a monitoring device in the prior art;

[0021] Figure 2 A schematic diagram of the structure of the data monitoring device for the battery module provided in this application;

[0022] Figure 3 A schematic diagram of the structure of the battery cell sequence provided in this application;

[0023] Figure 4 This is a schematic diagram of the structure of the acquisition module provided in this application.

[0024] The reference numerals in the embodiments of the present application are described as follows:

[0025] Battery cell: 21; aluminum bar: 22; sensor: 31; acquisition module: 32; wireless communication unit: 321; signal collection unit: 322; data processing unit: 323; power supply unit: 324; control unit: 325; sampling harness: 33. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] The embodiment of the present application provides a data monitoring device for a battery module and a battery pack, wherein the battery pack comprises an outer shell, a battery module and a data monitoring device, the data monitoring device is used to collect the cell status data of the battery module, and the battery module and the data monitoring device are both located in the outer shell.

[0028] See also Figures 2 to 3 In the battery pack provided in the embodiment of the present application, the battery module includes a plurality of battery cells 21 and a plurality of aluminum bars 22 arranged in sequence. Each pole of the battery cell 21 is electrically connected to an aluminum bar 22, that is, the number of poles is consistent with the number of aluminum bars, and the two are electrically connected one by one. The two aluminum bars corresponding to the poles on one side of two adjacent battery cells are electrically connected, thereby realizing the electrical connection between adjacent battery cells. And the plurality of battery cells 21 are connected in parallel or in series through the plurality of aluminum bars 22, such as Figure 3 The battery cell arrangement shown can realize the series connection of multiple battery cells 21 through the aluminum bus 22 .

[0029] The data monitoring device includes a plurality of sensors 31 and a collection module 32. Each of the sensors 31 is correspondingly arranged on an aluminum bar 22, and is used to collect the status data of the battery cell electrically connected to the corresponding aluminum bar 22; the sensors 31 are connected in series through a sampling harness 33 to form a non-closed sensor chain. The collection module 32 is wirelessly connected to an external device, and the collection module 32 is electrically connected to any sensor 31, and receives the status data collected by each sensor 31 through the sensor chain. Specifically, the sensor 31 connected to the collection module 32 directly sends the status data it collects to the collection module 32, and other sensors 31 can send the status data to the collection module 32 through adjacent sensors, so that the collection module 32 can obtain the status data collected by all sensors. The collection module 32 wirelessly transmits the received status data to the external device.

[0030] Therefore, through the above method, the present application only needs to layout the sampling harness 33 between the sensors 31, and there is no need to layout the main harness, which can simplify the layout of the sampling harness, which is beneficial to reduce the battery pack space occupied by the data monitoring device, so that the battery pack has a larger heat dissipation space, and by sending the status data of the battery cell to an external device wirelessly, there is no need to lead the sampling harness out of the battery pack, which can avoid punching holes in the battery pack outer shell.

[0031] The status data of the battery cell includes the voltage data, temperature data and internal resistance data of the battery cell.

[0032] In addition, the present application arranges a sensor on each aluminum bar 22 for data collection, thereby increasing the coverage of temperature monitoring, so that external equipment can quickly respond to changes in the battery cell temperature.

[0033] Optionally, the two electrically connected aluminum bars 22 in the battery module may be integrally formed, or may be independent structures, and the two may be electrically connected via a connector.

[0034] like Figure 4 As shown, further, the acquisition module 32 includes a wireless communication unit 321 , a signal collection unit 322 , a data processing unit 323 and a power supply unit 324 .

[0035] The power supply unit 324 is used to provide working voltage to the wireless communication unit 321 , the signal collection unit 322 and the data processing unit 323 .

[0036] The signal collection unit 322 is electrically connected to any sensor 31 to receive the status data collected by each sensor 31 through the sensor chain.

[0037] The data processing unit 323 is used to convert the status data received by the signal collection unit 322 into at least one of the voltage data, temperature data and internal resistance data of the corresponding battery cell, for example, it can be voltage data or temperature data, or it can include voltage data, temperature data and internal resistance data at the same time.

[0038] The wireless communication unit 321 is connected to an external device via wireless communication, and is used to wirelessly transmit at least one of the voltage data, temperature data, and internal resistance data of each battery cell to the external device.

[0039] The signal collection unit 322 is electrically connected to the sensor 31 at one end of the sensor chain. The acquisition module 32 also includes a control unit 325, which is electrically connected to the sensor 31 at the other end of the sensor chain, and is used to send a start or stop control signal to each sensor 31. The control signal is a signal for controlling the sensor 31 to start or stop the acquisition work. The acquisition module 32 can periodically control the start and stop of the sensor 31. For example, the sensor 31 stops working after working for a first predetermined time, and starts to enter the working state again after stopping working for a second predetermined time. The first predetermined time can be, for example, 1 hour, 2 hours, etc., and the second predetermined time can be, for example, 5s or 10s, etc., so that the sensor can be prevented from being in the working state for a long time, which is conducive to extending the life of the sensor.

[0040] Of course, in other embodiments, the control unit 325 may not be provided in the acquisition module 32 to control the start and stop of the sensor. The sensor 31 can send the collected status data to the acquisition module 32 in real time, so that the acquisition module 32 can send the status data of the battery cell in time, so that when a battery cell fails, it can be discovered in the first time to take corresponding measures.

[0041] In the embodiment of the present application, the plurality of battery cells 21 arranged in sequence form a battery cell sequence, and the aluminum bar 22 includes a plurality of first aluminum bars electrically connected to the poles on one side of the battery cell sequence and a plurality of second aluminum bars electrically connected to the poles on the other side of the battery cell sequence. Figure 2 As shown, the aluminum row on the upper side is the first aluminum row, and the aluminum row on the lower side is the second aluminum row. The sensors 31 on the two adjacent first aluminum rows are electrically connected through a sampling harness, and the sensors 31 on the two adjacent second aluminum rows are electrically connected through a sampling harness. The sensors 31 on the first aluminum row and the second aluminum row at one end of the battery cell sequence are electrically connected through a sampling harness, that is, Figure 2 The last first aluminum row and the last second aluminum row on the right side are also electrically connected through the sampling harness, thereby forming a U-shaped sensor chain. The signal collection unit 322 and the control unit 325 are electrically connected to the sensors at both ends of the U-shaped sensor chain, respectively.

[0042] In the embodiment of the present application, the acquisition module 321 is implemented by a flexible circuit board. The external device is a main control module of the battery management system, that is, data is transmitted by wireless communication transmission, so that the data monitoring device can communicate directly with the main control module without using a slave control module, which is conducive to reducing costs.

[0043] The above introduces a data monitoring device for a battery module, wherein the battery module includes a plurality of cells and a plurality of aluminum bars arranged in sequence, each pole of the cell is electrically connected to an aluminum bar, and the two aluminum bars corresponding to the poles on one side of two adjacent cells are electrically connected, and the data monitoring device includes a plurality of sensors and a collection module; each of the sensors is correspondingly arranged on an aluminum bar, and is used to collect the status data of the cell electrically connected to the corresponding aluminum bar; the sensors are connected in series through sampling harnesses to form a non-closed sensor chain; the collection module is wirelessly connected to an external device, and the collection module is electrically connected to any sensor, and the status data collected by each sensor is received through the sensor chain, and the received status data is wirelessly transmitted to the external device. In the above manner, it is only necessary to lay out the sampling harnesses between the sensors, and there is no need to lay out the main harness, which can simplify the layout of the sampling harnesses, and is conducive to reducing the battery pack space occupied by the monitoring device, and by sending the status data of the cell to the external device wirelessly, there is no need to lead the sampling harness out of the battery pack, and it can avoid drilling holes on the battery pack shell.

[0044] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A data monitoring device for a battery module, the battery module comprising a plurality of battery cells and a plurality of aluminum bars arranged in sequence, each pole of the battery cell being electrically connected to an aluminum bar, and two aluminum bars corresponding to the poles on one side of two adjacent battery cells being electrically connected, characterized in that: The data monitoring device includes several sensors and acquisition modules; Each of the sensors is correspondingly arranged on an aluminum busbar, and is used to collect status data of the battery cells electrically connected to the corresponding aluminum busbar; the sensors are connected in series through a sampling harness to form a non-closed sensor chain; the acquisition module is wirelessly connected to an external device, and the acquisition module is electrically connected to any sensor, and receives the status data collected by each sensor through the sensor chain, and wirelessly transmits the received status data to the external device.

2. The data monitoring device according to claim 1, characterized in that: The acquisition module includes a wireless communication unit, a signal collection unit, a data processing unit and a power supply unit; The power supply unit is used to provide working voltage to the wireless communication unit, the signal collection unit and the data processing unit; The signal collection unit is electrically connected to any sensor to receive the status data collected by each sensor through the sensor chain; The data processing unit is used to convert the state data received by the signal collection unit into at least one of voltage data, temperature data and internal resistance data of the corresponding battery cell; The wireless communication unit is connected to the external device via wireless communication, and is used to wirelessly transmit at least one of the voltage data, temperature data and internal resistance data of each battery cell to the external device.

3. The data monitoring device according to claim 2, characterized in that: The signal collection unit is electrically connected to the sensor at one end of the sensor chain.

4. The data monitoring device according to claim 3, characterized in that: The acquisition module further comprises a control unit, which is electrically connected to the sensor at the other end of the sensor chain and is used to send a start or stop control signal to each sensor.

5. The data monitoring device according to any one of claims 1 to 4, characterized in that: A plurality of battery cells arranged in sequence form a battery cell sequence, the aluminum bars include a plurality of first aluminum bars electrically connected to poles on one side of the battery cell sequence and a plurality of second aluminum bars electrically connected to poles on the other side of the battery cell sequence, the sensors on two adjacent first aluminum bars are electrically connected through a sampling harness, the sensors on two adjacent second aluminum bars are electrically connected through a sampling harness, and the sensors on the first aluminum bar and the second aluminum bar at one end of the battery cell sequence are electrically connected through a sampling harness, thereby forming a U-shaped sensor chain.

6. The data monitoring device according to any one of claims 1 to 4, characterized in that: The acquisition module is implemented by a flexible circuit board.

7. The data monitoring device according to any one of claims 1 to 4, characterized in that: The external device is a main control module of the battery management system.

8. A battery pack, characterized in that: It comprises an outer shell, a battery module and a data monitoring device arranged in the outer shell, and the data monitoring device is the data monitoring device according to any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that: The two electrically connected aluminum bars in the battery module are integrally formed.

10. The battery pack according to claim 8, characterized in that: The multiple cells in the battery module are connected in parallel or in series through the aluminum busbar.

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