Power battery with detection function

Abstract

The utility model discloses a power battery with a detection function, and relates to the technical field of lithium batteries. The power battery with the detection function comprises a shell, and a battery cell, a sensor sheet and a processing transmission module which are mounted in the shell, the sensor sheet is connected with the battery cell and is connected with the processing transmission module, the processing transmission module is used for being in wireless communication connection with the controller, the sensor sheet is used for detecting state information of the battery cell in real time and sending the state information to the processing transmission module, and the processing transmission module is used for processing the state information; and the obtained digital signal is sent to the controller. Compared with the prior art, the power battery with the detection function provided by the utility model adopts the sensor sheet connected with the battery cell and the processing transmission module in wireless communication connection with the controller, so that the state information of the battery cell can be directly measured, the interference of the shell is avoided, the detection precision is improved, and normal early warning is ensured; and the safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and in particular to a power battery with a detection function. Background Art

[0002] Power batteries can provide power sources for electric vehicles and are widely used in the new energy industry. They have the advantages of long life, safe use, and large capacity. In order to ensure the safety of power battery operation, sensors are usually used to detect the temperature and pressure of the power battery to achieve the early warning function. Current sensors are generally installed on the surface of the power battery shell, and use indirect measurement to detect the temperature and pressure of the internal battery cells. However, since the battery shell isolates part of the temperature and has a certain impact on the pressure detection, the temperature and pressure status information detected by the sensor will be inaccurate, resulting in the inability of the power battery to warn normally, and poor safety.

[0003] In view of this, it is particularly important to design and manufacture a power battery with high detection accuracy and strong safety and detection function, especially in the production of lithium batteries. Utility Model Content

[0004] The purpose of the utility model is to provide a power battery with a detection function, which can directly measure the status information of the battery cell, avoid interference from the shell, improve the detection accuracy, ensure normal warning, and enhance safety.

[0005] The utility model is realized by adopting the following technical solutions.

[0006] A power battery with a detection function comprises a shell, a battery cell installed in the shell, a sensor sheet and a processing and transmission module, the sensor sheet is connected to the battery cell and to the processing and transmission module, the processing and transmission module is used for wireless communication with a controller, the sensor sheet is used for real-time detection of status information of the battery cell and sending the status information to the processing and transmission module, the processing and transmission module is used for processing the status information and sending the obtained digital signal to the controller.

[0007] Optionally, the processing and transmission module includes a signal processing unit and a signal transmission unit. The sensor sheet is connected to the signal transmission unit through the signal processing unit. The signal processing unit is used to process the status information and obtain a digital signal. The signal transmission unit is used to send the digital signal to the controller.

[0008] Optionally, the battery cell includes a plurality of stacked pole pieces, and the sensor piece is arranged in contact with the pole pieces; the sensor piece is arranged between two adjacent pole pieces, or the sensor piece is arranged outside the outermost pole piece.

[0009] Optionally, the pole piece is provided with a pole ear, the sensor piece is provided with a conductive portion, the pole ear and the conductive portion are stacked and both are connected to the housing.

[0010] Optionally, the outer shell includes a shell and a cover plate, the cover plate is covered on the shell and connected to the shell, the battery cell and the sensor sheet are both arranged in the shell, the processing and transmission module is arranged between the battery cell and the cover plate, the processing and transmission module is provided with a make way opening, the pole ear and the conductive part are both arranged through the make way opening and are both connected to the cover plate.

[0011] Optionally, there are two cover plates and two processing and transmission modules, the two cover plates are arranged at two ends of the shell relatively to each other, and each processing and transmission module is arranged between the battery cell and a cover plate.

[0012] Optionally, the length of the shell is greater than the length of the battery cell, and the cover plate is embedded in the shell.

[0013] Optionally, the cover plate is provided with a limiting groove, and the processing and transmission module is embedded in the limiting groove.

[0014] Optionally, the sensor sheet is provided with a signal transmission line, and the sensor sheet is connected to the processing transmission module via the signal transmission line.

[0015] Optionally, a plurality of detection electrodes are arranged in the sensor sheet, and the plurality of detection electrodes are distributed in a dot-shaped rectangular array.

[0016] The power battery with detection function provided by the utility model has the following beneficial effects:

[0017] The power battery with detection function provided by the utility model has a sensor sheet connected to the battery cell and connected to the processing and transmission module, the processing and transmission module is used to wirelessly connect to the controller, the sensor sheet is used to detect the state information of the battery cell in real time, and send the state information to the processing and transmission module, the processing and transmission module is used to process the state information and send the obtained digital signal to the controller. Compared with the prior art, the power battery with detection function provided by the utility model adopts a sensor sheet connected to the battery cell and a processing and transmission module wirelessly connected to the controller, so it can directly measure the state information of the battery cell, avoid interference from the shell, improve detection accuracy, ensure normal warning, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 An exploded view of a power battery with a detection function provided by an embodiment of the utility model;

[0020] Figure 2 A structural block diagram of a power battery with a detection function provided by an embodiment of the utility model;

[0021] Figure 3 An exploded view of the connection between the battery cell and the sensor sheet in the power battery with detection function provided by the embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the structure of a sensor sheet in a power battery with detection function provided in an embodiment of the utility model.

[0023] Icons: 100 - power battery with detection function; 110 - shell; 111 - housing; 112 - cover plate; 113 - limit groove; 120 - battery cell; 121 - pole piece; 122 - pole ear; 130 - sensor sheet; 131 - conductive part; 132 - signal transmission line; 133 - detection electrode; 140 - processing and transmission module; 141 - signal processing unit; 142 - signal transmission unit; 143 - clearance port; 150 - accommodating cavity. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present utility model, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0030] Please refer to Figures 1 to 4 The embodiment of the utility model provides a power battery 100 with a detection function for providing electric energy. It can directly measure the state information of the battery cell 120, avoid interference from the housing 110, improve detection accuracy, ensure normal warning, and enhance safety.

[0031] The power battery 100 with detection function includes a shell 110, a battery cell 120, a sensor sheet 130 and a processing and transmission module 140. Among them, the battery cell 120, the sensor sheet 130 and the processing and transmission module 140 are all installed in the shell 110, the sensor sheet 130 is connected to the battery cell 120, and is connected to the processing and transmission module 140, the battery cell 120 is used to realize the power supply function, and the sensor sheet 130 is used to detect the state information of the battery cell 120 in real time, and send the state information to the processing and transmission module 140. The processing and transmission module 140 is used to wirelessly connect with the controller (not shown), and the processing and transmission module 140 can process the state information and send the obtained digital signal to the controller, so that the controller can simulate and evaluate the digital signal, thereby realizing the early warning function. Specifically, since the sensor sheet 130 is arranged in the shell 110 and connected to the battery cell 120, the sensor sheet 130 can directly measure the state information of the battery cell 120, avoid being interfered by the shell 110, thereby improving the detection accuracy, ensuring normal early warning, and improving safety.

[0032] Furthermore, the processing and transmission module 140 is wirelessly connected to the controller, that is, there is no data line connection between the processing and transmission module 140 and the controller. In this way, there is no need to open a via hole on the housing 110 for the data line to pass through, thereby improving the sealing of the housing 110 and enhancing the protection effect of the housing 110. In this embodiment, the processing and transmission module 140 and the controller are connected via Bluetooth, but it is not limited to this. In other embodiments, the processing and transmission module 140 and the controller can be connected via WIFI or GPRS, and the wireless connection method between the processing and transmission module 140 and the controller is not specifically limited.

[0033] The processing and transmission module 140 includes a signal processing unit 141 and a signal transmission unit 142. The sensor sheet 130 is connected to the signal transmission unit 142 through the signal processing unit 141. The sensor sheet 130 is used to send the detected state information to the signal processing unit 141. The signal processing unit 141 is used to process the state information and obtain a digital signal. The signal processing unit 141 is also used to send the digital signal to the signal transmission unit 142. The signal transmission unit 142 is wirelessly connected to the controller. The signal transmission unit 142 is used to send the digital signal to the controller. The controller is used to simulate and evaluate the digital signal to achieve the early warning function.

[0034] The battery cell 120 includes a plurality of stacked pole pieces 121. The sensor piece 130 is arranged in contact with the pole piece 121, and the sensor piece 130 is used to detect state information such as temperature and pressure of the battery cell 120. In this embodiment, the sensor piece 130 is arranged between two adjacent pole pieces 121, but it is not limited to this. In other embodiments, the sensor piece 130 can be arranged outside the outermost pole piece 121, and the sensor piece 130 can also be arranged between the multi-layer structure of the pole piece 121. The arrangement position of the sensor piece 130 is not specifically limited.

[0035] In this embodiment, the number of sensor sheets 130 is one, and the sensor sheet 130 is disposed between two adjacent pole sheets 121 , but this is not limited thereto. In other embodiments, the number of sensor sheets 130 may be two or three, and the number of sensor sheets 130 is not specifically limited.

[0036] It should be noted that the pole piece 121 is provided with a pole ear 122, which is used to realize the conductive function so that the pole piece 121 is energized. The sensor piece 130 is provided with a conductive portion 131, which is also used to realize the conductive function so that the sensor piece 130 is energized. Specifically, the pole ear 122 and the conductive portion 131 are stacked and both are connected to the housing 110, and the housing 110 is connected to an external power supply so as to realize the simultaneous energization of the pole piece 121 and the sensor piece 130.

[0037] In this embodiment, the area of ​​the conductive portion 131 is smaller than the area of ​​the pole ear 122 , and the pole ear 122 covers the conductive portion 131 . The multiple pole ears 122 work together to support and shield the conductive portion 131 , thereby protecting and strengthening the conductive portion 131 .

[0038] The housing 110 includes a shell 111 and a cover plate 112. The cover plate 112 is covered on the shell 111 and connected to the shell 111. The cover plate 112 and the shell 111 together form a receiving cavity 150 for receiving the battery cell 120, the sensor sheet 130 and the processing and transmission module 140. The battery cell 120 and the sensor sheet 130 are both arranged in the shell 111, and the shell 111 is used to shield and protect the battery cell 120 and the sensor sheet 130. The processing and transmission module 140 is arranged between the battery cell 120 and the cover plate 112, and the battery cell 120 and the cover plate 112 work together to limit the processing and transmission module 140. Specifically, the processing and transmission module 140 is provided with a clearance opening 143 , the pole ear 122 and the conductive part 131 are both arranged through the clearance opening 143 , and are both connected to the cover plate 112 , and the cover plate 112 is connected to an external power supply to realize simultaneous power supply of the pole piece 121 and the sensor piece 130 .

[0039] In this embodiment, the cover plate 112 is welded to the shell 111, and the pole ear 122 and the conductive part 131 are welded to the cover plate 112 to ensure the connection strength and prevent accidental loosening, and to achieve the conduction function between the pole ear 122 and the conductive part 131 and the cover plate 112.

[0040] It is worth noting that there are two covers 112 and two processing and transmission modules 140. The two covers 112 are arranged at the two ends of the shell 111, and the two covers 112 and the shell 111 jointly enclose a receiving cavity 150. Each processing and transmission module 140 is arranged between the battery cell 120 and a cover 112 to limit the two processing and transmission modules 140 at the same time. Specifically, among the multiple pole pieces 121, the pole ears 122 of a part of the pole pieces 121 extend in the direction of the first cover plate 112, and the pole ears 122 of the other part of the pole pieces 121 extend in the direction of the second cover plate 112; a conductive part 131 is respectively arranged at both ends of the sensor piece 130, that is, one conductive part 131 of the sensor piece 130 extends in the direction of the first cover plate 112, and the other conductive part 131 extends in the direction of the second cover plate 112; in this way, the two conductive parts 131 of the sensor piece 130 can be supported and shielded by the pole ears 122, so as to ensure the reliability of the power supply of the sensor piece 130.

[0041] In this embodiment, the length of the housing 111 is greater than the length of the battery cell 120, that is, the housing 111 has a space margin in its length direction for installing the cover plate 112. Specifically, the cover plate 112 is embedded in the housing 111, and the housing 111 can shield and protect the peripheral side wall of the cover plate 112 to improve the reliability of the connection between the cover plate 112 and the housing 111, and prevent the cover plate 112 from being separated from the housing 111 in the event of an accidental collision of the power battery 100 with a detection function.

[0042] Furthermore, the cover plate 112 is provided with a limiting groove 113, and the processing and transmission module 140 is embedded in the limiting groove 113. The limiting groove 113 can limit the processing and transmission module 140 to prevent the processing and transmission module 140 from being displaced relative to the cover plate 112, thereby ensuring the reliability of the connection between the processing and transmission module 140 and the sensor sheet 130.

[0043] In this embodiment, the sensor sheet 130 is provided with a signal transmission line 132, and the sensor sheet 130 is connected to the processing transmission module 140 through the signal transmission line 132. Specifically, the processing transmission module 140 is a circuit board, and the signal transmission line 132 is connected between the sensor sheet 130 and the circuit board to ensure the reliability of signal transmission and improve the response speed.

[0044] In this embodiment, a plurality of detection electrodes 133 are arranged in the sensor sheet 130, and the plurality of detection electrodes 133 are distributed in a dot-shaped rectangular array, and each detection electrode 133 is used to detect the state information of a point on the electrode sheet 121, and the plurality of detection electrodes 133 work together to further improve the detection accuracy of the state information of the battery cell 120. However, this is not limited to this, and in other embodiments, the number of detection electrodes 133 in the sensor sheet 130 is one, and the detection electrode 133 can be arranged longitudinally, transversely or in an annular arrangement, or can be a planar conductive electrode, and the number and arrangement form of the detection electrodes 133 are not specifically limited.

[0045] The power battery 100 with detection function provided by the embodiment of the utility model has a sensor sheet 130 connected to the battery cell 120 and connected to the processing and transmission module 140. The processing and transmission module 140 is used to wirelessly connect to the controller. The sensor sheet 130 is used to detect the status information of the battery cell 120 in real time and send the status information to the processing and transmission module 140. The processing and transmission module 140 is used to process the status information and send the obtained digital signal to the controller. Compared with the prior art, the power battery 100 with detection function provided by the utility model adopts the sensor sheet 130 connected to the battery cell 120 and the processing and transmission module 140 wirelessly connected to the controller, so it can directly measure the status information of the battery cell 120, avoid interference from the shell 110, improve detection accuracy, ensure normal warning, and improve safety.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power battery with detection function, characterized in that: It includes a shell and a battery cell, a sensor sheet and a processing and transmission module installed in the shell, the sensor sheet is connected to the battery cell and to the processing and transmission module, the processing and transmission module is used to wirelessly connect to a controller, the sensor sheet is used to detect the status information of the battery cell in real time, and send the status information to the processing and transmission module, the processing and transmission module is used to process the status information and send the obtained digital signal to the controller.

2. The power battery with detection function according to claim 1, characterized in that: The processing and transmission module includes a signal processing unit and a signal transmission unit. The sensor sheet is connected to the signal transmission unit via the signal processing unit. The signal processing unit is used to process the status information and obtain the digital signal. The signal transmission unit is used to send the digital signal to the controller.

3. The power battery with detection function according to claim 1, characterized in that: The battery cell comprises a plurality of electrode sheets arranged in a stacked manner, and the sensor sheet is arranged in contact with the electrode sheets; The sensor sheet is arranged between two adjacent pole sheets, or the sensor sheet is arranged outside the outermost pole sheet.

4. The power battery with detection function according to claim 3, characterized in that: The pole piece is provided with a pole ear, the sensor piece is provided with a conductive part, the pole ear and the conductive part are stacked and connected to the housing.

5. The power battery with detection function according to claim 4, characterized in that: The outer shell includes a shell and a cover plate, the cover plate is covered on the shell and connected to the shell, the battery cell and the sensor sheet are both arranged in the shell, the processing and transmission module is arranged between the battery cell and the cover plate, the processing and transmission module is provided with a clearance opening, the pole ear and the conductive part are both arranged through the clearance opening and are both connected to the cover plate.

6. The power battery with detection function according to claim 5, characterized in that: The number of the cover plates and the number of the processing and transmission modules are both two, the two cover plates are arranged at two ends of the shell opposite to each other, and each processing and transmission module is arranged between the battery cell and one of the cover plates.

7. The power battery with detection function according to claim 5, characterized in that: The length of the shell is greater than the length of the battery core, and the cover plate is embedded in the shell.

8. The power battery with detection function according to claim 5, characterized in that: The cover plate is provided with a limiting groove, and the processing and transmission module is embedded in the limiting groove.

9. The power battery with detection function according to claim 1, characterized in that: The sensor sheet is provided with a signal transmission line, and the sensor sheet is connected to the processing transmission module through the signal transmission line.

10. The power battery with detection function according to claim 1, characterized in that: A plurality of detection electrodes are arranged in the sensor sheet, and the plurality of detection electrodes are distributed in a dot-shaped rectangular array.

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