Temperature acquisition system and battery box

Abstract

The embodiment of the utility model provides a temperature acquisition system and a battery box, and relates to the technical field of batteries. The temperature acquisition system comprises a plurality of battery cells, an inspection device and a slave control device. And a temperature sensor is arranged on each battery cell. The inspection device is provided with an input end and an output end. The input end is connected with the temperature sensor. And a multiplexer is arranged in the inspection device. The multiplexer is connected with the input end and the output end. The slave control device is connected with the output end. And a temperature acquisition chip is arranged in the slave control device.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a temperature acquisition system and a battery box. Background Technology

[0002] With the rapid development of the new energy industry, the application fields of lithium batteries are also constantly expanding. Because batteries generate heat during operation, overheating may occur if not monitored, leading to a significant decrease in battery performance and, in severe cases, a risk of thermal runaway. Current technology involves installing temperature sensors inside the battery pack and connecting these sensors to a slave control acquisition board. The slave control acquisition board has a temperature acquisition channel that can simulate the current battery pack temperature based on the resistance values ​​of the temperature sensors.

[0003] The inventors discovered that the temperature acquisition channels on the control board are far fewer than the number of battery cells that need to be tested. This means that only a portion of the cells in the battery box can be monitored, making it impossible to monitor the temperature of each individual cell. When a single cell experiences a temperature anomaly, it cannot be detected immediately, leading to further damage. Utility Model Content

[0004] The purpose of this invention is to provide a temperature acquisition system and a battery box that can monitor the temperature of each battery cell in the battery box, detect abnormalities in the battery cells in a timely manner, reduce losses, and reduce equipment costs without increasing the number of slave control devices.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a temperature acquisition system, comprising:

[0007] A plurality of battery cells, each of which is equipped with a temperature sensor;

[0008] An inspection device is provided with an input terminal and an output terminal. The input terminal is connected to the temperature sensor. The inspection device is equipped with a multiplexer, which is connected to the input terminal and the output terminal respectively.

[0009] The slave control device is connected to the output terminal, and a temperature acquisition chip is installed inside the slave control device.

[0010] In an optional implementation, the multiplexer includes multiple channel switches for connecting or disconnecting the input and output terminals.

[0011] In an optional implementation, the inspection device further includes a backup module located within the inspection device. The backup module is connected to both the input terminal and the output terminal. When the multiplexer is not in operation, the backup module is activated to transmit the signal from the input terminal to the output terminal.

[0012] In an optional implementation, the backup module includes multiple connecting lines, each of which is equipped with a relay.

[0013] In an optional implementation, the number of connecting lines is the same as the number of temperature acquisition chips.

[0014] In an optional implementation, the inspection device is further provided with a control module, which is used to control the signal output of the multiplexer.

[0015] In an optional implementation, the temperature acquisition system further includes a main control device, and the inspection device further includes a communication module connected to the main control device. The main control device is used to communicate with and supply power to the inspection device.

[0016] In an optional implementation, the inspection device is further provided with a communication interface, which is connected to the communication module and is used to connect to the main control device.

[0017] In an optional embodiment, the inspection device is further provided with a fixing component for fixing the inspection device.

[0018] Secondly, this utility model provides a battery box, including a temperature acquisition system as described in any of the foregoing embodiments.

[0019] The beneficial effects of the temperature acquisition system and battery box provided in this embodiment of the present invention include:

[0020] This temperature acquisition system includes several battery cells, an inspection device, and a slave control device. Each battery cell is equipped with a temperature sensor. The inspection device has an input terminal and an output terminal. The input terminal is connected to the temperature sensor. A multiplexer is installed within the inspection device, connecting to both the input and output terminals. The slave control device is connected to the output terminal and contains a temperature acquisition chip. This invention adds an inspection device between the slave control device and the temperature sensor, with the inspection device containing a multiplexer. The multiplexer selectively outputs multiple temperature signals, satisfying the requirement to connect to and acquire the temperature signal of each battery cell while reducing the number of signal lines between the inspection device and the slave control device. This allows the temperature signal of each battery cell to be input to the slave control device for temperature monitoring without increasing the number of slave control devices. This invention can monitor the temperature of each battery cell in the battery box, promptly detect cell abnormalities, reduce losses, and lower equipment costs without increasing the number of slave control devices. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the temperature acquisition system provided in an embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the inspection device provided in an embodiment of the present utility model;

[0024] Figure 3 A schematic diagram of the inspection device provided in this embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the spare module provided in an embodiment of this utility model.

[0026] Icons: 100-Temperature acquisition system; 10-Battery cell; 20-Inspection device; 21-Multiplexer; 22-Spare module; 221-Connecting cable; 222-Relay; 23-Input terminal; 24-Output terminal; 25-Control module; 26-Communication module; 27-Communication interface; 28-Fixing component; 30-Slave control device; 40-Master control device. Detailed Implementation

[0027] Existing technology involves installing temperature sensors inside the battery box and connecting these sensors to a slave control device 30. The slave control device 30 has temperature acquisition channels that can simulate the current battery box temperature based on the resistance values ​​of the temperature sensors. However, the number of temperature acquisition channels on the slave control device 30 is far less than the number of battery cells 10 that need to be monitored. This means that only some of the battery cells 10 inside the battery box can have their temperature collected, making it impossible to monitor the temperature of each individual cell 10. When a single battery cell 10 experiences a temperature anomaly, it cannot be detected immediately, leading to further damage to the cell 10.

[0028] To address the aforementioned problems, this utility model provides a temperature acquisition system 100, which can monitor the temperature of each battery cell 10 without increasing the number of slave control devices 30, thereby improving the problem of not being able to detect whether the temperature of a single chip is abnormal in a timely manner.

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0035] First embodiment

[0036] Please refer to Figure 1-Figure 3 The temperature acquisition system 100 provided by this utility model is used for temperature monitoring of the battery cell 10 in the battery box.

[0037] This temperature acquisition system 100 includes several battery cells 10, an inspection device 20, a slave control device 30, and a master control device 40.

[0038] Each battery cell 10 is equipped with a temperature sensor. Specifically, the temperature sensor is located on the top cover of the battery cell 10 and is used to detect the temperature of a single battery cell 10 and transmit the collected temperature signal to the inspection device 20.

[0039] In this embodiment, there are eighteen battery cells 10. The battery cells 10 are arranged in three columns inside the battery box, with six battery cells 10 spaced apart in each column.

[0040] The inspection device 20 is equipped with an input terminal 23 and an output terminal 24. The input terminal 23 is connected to a temperature sensor and is used to transmit the temperature signal collected by the temperature sensor to the inspection device 20. The inspection device 20 contains a multiplexer 21. The multiplexer 21 is connected to both the input terminal 23 and the output terminal 24. It is understood that the multiplexer 21 is used to receive the temperature signals from all the battery cells 10 and selectively output the temperature signals through the output terminal 24. For example, in this embodiment, the number of battery cells 10 is eighteen. The multiplexer 21 receives eighteen temperature signals through the input terminal 23 and selects a portion of the temperature signals to output through the output terminal 24.

[0041] The slave control device 30 is connected to the output terminal 24 and is used to receive the temperature signal output by the multiplexer 21. The slave control device 30 is equipped with a temperature acquisition chip for monitoring the temperature and determining whether the temperature of the battery cell 10 is abnormal.

[0042] Specifically, in this embodiment, the slave control device 30 is equipped with three temperature acquisition chips, which can simultaneously monitor the temperature of the three battery cells 10. The aforementioned multiplexer 21 can receive eighteen temperature signals and divide these temperature signals into six groups of three. It can be understood that the multiplexer 21 can simultaneously output three of the eighteen temperature signals. After a period of time, the multiplexer 21 switches the output groups, that is, it transmits another group of temperature signals from the battery cells 10 to the slave control device 30. By switching sequentially, the temperature signals of all the battery cells 10 can be transmitted to the slave control device 30.

[0043] Understandably, the slave control device 30 can only monitor the temperature of a portion of the battery cells 10 simultaneously. The multiplexer 21 can aggregate the temperature signals from all the battery cells 10 and selectively output them based on the number of temperature signals that the slave control device 30 can collect.

[0044] By adding a multiplexer 21 to the inspection device 20, the temperature signals of all cells 10 can be collected, preventing the failure to detect temperature anomalies in a single cell 10 in a timely manner. This avoids the abnormal cell 10 affecting the operation of other cells 10, thus increasing the number of damaged cells 10. The multiplexer 21 also avoids increasing the number of slave control devices 30, reduces the number of temperature acquisition chips in the slave control devices 30, and lowers equipment costs.

[0045] Specifically, the multiplexer 21 includes multiple channel switches. These channel switches are used to connect or disconnect the input terminal 23 and the output terminal 24. It is understood that in this embodiment, eighteen channel switches are provided, each corresponding to one of the eighteen temperature sensors. The channel switches can selectively open a portion of them, thereby transmitting the temperature signals from some of the temperature sensors to the slave device 30 through the output terminal 24.

[0046] Please refer to Figure 4 The inspection device 20 also includes a backup module 22. The backup module 22 is located inside the inspection device 20. The backup module 22 is connected to the input terminal 23 and the output terminal 24 respectively. When the multiplexer 21 is not working, the backup module 22 is activated and transmits the temperature signal from the input terminal 23 to the output terminal 24.

[0047] Specifically, the backup module 22 includes multiple connecting lines 221. Each connecting line 221 is equipped with a relay 222. It can be understood that when the multiplexer 21 loses power or is damaged and does not work, the relay 222 closes, turning on the connecting line 221, so that the temperature signal can be transmitted to the slave control device 30 through the output terminal 24 via the connecting line 221.

[0048] Furthermore, the number of connecting lines 221 is the same as the number of temperature acquisition chips. It is understood that the backup module 22 is connected to some of the eighteen temperature sensors via connecting lines 221. Specifically, the backup module 22 can only acquire temperature signals from three temperature sensors and transmit these signals to the slave control device 30. It is understood that the backup module 22 does not have the switching function of the multiplexer 21. Even when the multiplexer 21 loses power or is damaged and not working, the slave control device 30 can still acquire the local temperature of the battery cell 10.

[0049] Preferably, in this embodiment, there are three connecting lines 221. The connecting lines 221 are respectively connected to the temperature sensors of the three battery cells 10. The three battery cells 10 are positioned at the upper left, middle, and lower right. In other embodiments, the positions of the three battery cells 10 can be set as needed, and this invention does not limit this.

[0050] Furthermore, the inspection device 20 also includes a control module 25. The control module 25 is used to control the signal output of the multiplexer 21. Specifically, the control module 25 is used to control the opening or closing of the channel switch.

[0051] In this embodiment, the master control device 40 is used to communicate with and supply power to the inspection device 20. The inspection device 20 also includes a communication module 26. The communication module 26 is connected to the master control device 40. The master control device 40 is also used to communicate with and supply power to the slave control device 30.

[0052] Since the inspection device 20 has a housing structure, it is also equipped with a communication interface 27. The communication interface 27 is connected to the communication module 26. The communication interface 27 is used to connect to the main control device 40. It is understood that the communication interface 27 and the communication module 26 are always connected. The communication interface 27 is selectively connected to the main control device 40 via a plug, facilitating the disassembly of the inspection device 20.

[0053] To secure the inspection device 20, a fixing member 28 is also provided on the inspection device 20. The fixing member 28 is used to fix the inspection device 20. Specifically, in this embodiment, the fixing member 28 is a fixed support foot, which is fixed to the external structure by screws.

[0054] The working principle and process of the temperature acquisition system 100 in this embodiment are as follows:

[0055] The main control device 40 powers on the inspection device 20.

[0056] The inspection device performs functional self-tests on each of its 20 modules.

[0057] If the multiplexer 21 is functioning correctly, the control module 25 controls some channel switches to close and others to open. Specifically, the eighteen channel switches are divided into six groups of three. The control module 25 controls the first group of channel switches to close and the others to open. The slave device 30 monitors three temperature signals and sends them to the master device 40. The master device 40 compares the temperature signals with preset values ​​to determine if there is any abnormality. If normal, after waiting for a period of time, such as about 10 seconds, the control module 25 controls the second group of channel switches to close and the others to open. The slave device 30 and the master device 40 process the temperature signals sequentially. The above steps are repeated, and the operation is cyclical.

[0058] If the main control device 40 detects an abnormal temperature signal, it sends the channel switch number of the abnormal temperature to the inspection device 20. The inspection device 20 then determines the location of the abnormal cell 10 based on the number.

[0059] If the multiplexer 21 loses power or is damaged and cannot function properly, the backup module 22 will be activated. The backup module 22 will input the three fixed connection lines 221 to the slave control device 30, and the slave control device 30 will input the temperature signal to the master control device 40.

[0060] The beneficial effects of the temperature acquisition system 100 in this embodiment are:

[0061] This temperature acquisition system 100 includes several battery cells 10, a monitoring device 20, and a slave control device 30. Each battery cell 10 is equipped with a temperature sensor. The monitoring device 20 has an input terminal 23 and an output terminal 24. The input terminal 23 is connected to the temperature sensor. The monitoring device 20 contains a multiplexer 21, which is connected to both the input terminal 23 and the output terminal 24. The slave control device 30 is connected to the output terminal 24 and contains a temperature acquisition chip. This invention adds a monitoring device 20 between the slave control device 30 and the temperature sensor, and the monitoring device 20 contains a multiplexer 21. The multiplexer 21 can selectively output multiple temperature signals, which satisfies the requirement of connecting to each battery cell 10 to acquire the temperature signal of each battery cell 10, while reducing the number of signal lines between the monitoring device 20 and the slave control device 30. This allows the temperature signal of each battery cell 10 to be input to the slave control device 30 for temperature monitoring without increasing the number of slave control devices 30. This invention enables temperature monitoring of each battery cell 10 within the battery box, allowing for timely detection of any abnormalities in the battery cell 10, reducing losses, and lowering equipment costs without increasing the number of slave control devices 30.

[0062] Second embodiment

[0063] This embodiment provides a battery box, which includes the temperature acquisition system 100 described in the first embodiment. The battery cell 10 is fixed inside the battery box. The working principle and beneficial effects of the battery box in this embodiment are the same as those of the temperature acquisition system 100 described in the first embodiment.

[0064] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model.

Claims

1. A temperature acquisition system, characterized in that, include: A plurality of battery cells, each of which is equipped with a temperature sensor; An inspection device is provided with an input terminal and an output terminal. The input terminal is connected to the temperature sensor. The inspection device is equipped with a multiplexer, which is connected to the input terminal and the output terminal respectively. The slave control device is connected to the output terminal, and a temperature acquisition chip is installed inside the slave control device.

2. The temperature acquisition system according to claim 1, characterized in that, The multiplexer includes multiple channel switches, which are used to connect or disconnect the input and output terminals.

3. The temperature acquisition system according to claim 1, characterized in that, The inspection device also includes a backup module located inside the inspection device. The backup module is connected to both the input terminal and the output terminal. When the multiplexer is not working, the backup module is activated and transmits the signal from the input terminal to the output terminal.

4. The temperature acquisition system according to claim 3, characterized in that, The backup module includes multiple connecting lines, each of which is equipped with a relay.

5. The temperature acquisition system according to claim 4, characterized in that, The number of connecting wires is the same as the number of temperature acquisition chips.

6. The temperature acquisition system according to claim 1, characterized in that, The inspection device is also equipped with a control module, which is used to control the signal output of the multiplexer.

7. The temperature acquisition system according to claim 1, characterized in that, The temperature acquisition system also includes a main control device, and the inspection device also includes a communication module. The communication module is connected to the main control device, and the main control device is used to communicate with and supply power to the inspection device.

8. The temperature acquisition system according to claim 7, characterized in that, The inspection device is also equipped with a communication interface, which is connected to the communication module and is used to connect to the main control device.

9. The temperature acquisition system according to claim 1, characterized in that, The inspection device is also equipped with a fixing component, which is used to fix the inspection device.

10. A battery box, characterized in that, Including the temperature acquisition system as described in any one of claims 1-9.

Images