Top cover assembly and battery

Abstract

The utility model belongs to the technical field of batteries, and discloses a top cover assembly and a battery, the top cover assembly comprises a top cover sheet, lower plastic cement, a trigger switch sensor and an air temperature sensor, the trigger switch sensor and the air temperature sensor are electrically connected with each other, and a positive pole and a negative pole are arranged on the top cover sheet; the lower plastic is connected with the top cover sheet; the trigger switch sensor and the air temperature sensor are arranged on the side, facing the lower plastic, of the top cover piece. Thus, the air temperature sensor is arranged on the top cover piece, the air temperature and air pressure around the battery cells can be monitored in real time, when the state of a single battery cell is abnormal, the air temperature sensor sends a monitored signal to the trigger switch sensor in time, and then the charging and discharging speed and power of the battery cells are adjusted in time or circuit connection is cut off in time; and the safety and the service life of the battery are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a top cap subassembly and battery. BACKGROUND

[0002] Battery as a common energy storage device, is widely used in each field, in order to meet higher power demand, usually will adopt the battery with multiple battery core, and the battery is provided with BMS battery management system, is used for monitoring and managing the running state of battery, ensures the safety, performance and life of battery.

[0003] However, BMS battery management system can only monitor the overall state of battery, is difficult to monitor the state of each battery core, when the voltage, pressure and temperature parameters of single battery core are abnormal, is difficult to be monitored and positioned by BMS battery management system, there is the problem that the state of single battery core in battery is difficult to be monitored in real time. UTILITY MODEL CONTENTS

[0004] The utility model discloses a top cap subassembly and battery, to solve the problem that the state of single battery core in battery is difficult to be monitored in real time.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] First, a top cap subassembly, comprising: top cap sheet, the positive pole and the negative pole are set up on the top cap sheet;Lower plastic, the lower plastic is connected with the top cap sheet;Trigger switch sensor and air temperature sensor are electrically connected to each other, the trigger switch sensor and the air temperature sensor are all set up on the side of the top cap sheet towards the lower plastic.

[0007] As preferred, one of the trigger switch sensor and the air temperature sensor is electrically connected with the positive pole, and the other is electrically connected with the negative pole.

[0008] As preferred, the top cap sheet is provided with two installation grooves, and the trigger switch sensor and the air temperature sensor are respectively detachably arranged in the two installation grooves.

[0009] As preferred, the top cap subassembly further comprises two limit pieces, the lower plastic is provided with two installation holes corresponding to the positions of the installation grooves, and the two limit pieces are respectively arranged in the two installation holes, and the two limit pieces are respectively connected with the trigger switch sensor and the air temperature sensor.

[0010] As preferred, the limit piece is a buckle, and the length direction of the buckle is parallel to the length direction of the trigger switch sensor or the air temperature sensor connected therewith.

[0011] As preferred, one end of the trigger switch sensor away from the air temperature sensor is connected with a first connecting part, one end of the air temperature sensor away from the trigger switch sensor is connected with a second connecting part, one of the first connecting part and the second connecting part is electrically connected with the positive pole column, and the other is electrically connected with the negative pole column.

[0012] As preferred, the lower plastic is provided with a first connecting hole and a second connecting hole corresponding to the positions of the first connecting part and the second connecting part, respectively, so that the first connecting part can be detachably arranged in the first connecting hole, and the second connecting part can be detachably arranged in the second connecting hole.

[0013] As preferred, one end of the trigger switch sensor away from the air temperature sensor is connected with a first connecting part, one end of the air temperature sensor away from the trigger switch sensor is connected with a second connecting part, one of the first connecting part and the second connecting part is electrically connected with the positive pole column, and the other is electrically connected with the negative pole column.

[0014] As preferred, the lower plastic is provided with a first connecting hole and a second connecting hole corresponding to the positions of the first connecting part and the second connecting part, respectively, so that the first connecting part can be detachably arranged in the first connecting hole, and the second connecting part can be detachably arranged in the second connecting hole.

[0015] Secondly, a battery comprising a cell, a shell and the top cover assembly as described above, the top cover sheet is connected with the shell and forms a space for accommodating the cell.

[0016] The utility model discloses beneficial effects:

[0017] A top cover assembly, comprising a top cover sheet, a lower plastic and a sensing assembly, the top cover sheet is provided with a positive pole column and a negative pole column; the lower plastic is connected with the top cover sheet; a trigger switch sensor and an air temperature sensor are electrically connected with each other, and both are arranged on the side of the top cover sheet facing the lower plastic.

[0018] In this way, by arranging the air temperature sensor on the top cover sheet, the state of the cell can be monitored in real time by monitoring the air temperature and air pressure around the cell, so that when the state of the cell is abnormal, the air temperature sensor sends a signal to the trigger switch sensor, the charging and discharging rate, power of the cell are adjusted in time or the circuit connection is disconnected in time, so as to ensure the safety and service life of the battery, and the state of each cell in the battery can be monitored in real time. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a first structure schematic view of the top cover assembly in an embodiment of the utility model;

[0020] Figure 2 It is a structure schematic view of the top cover sheet in an embodiment of the utility model;

[0021] Figure 3 is a second structural schematic view of the top cover assembly in an embodiment of the present application.

[0022] In the drawings:

[0023] 1, top cover sheet; 11, positive pole; 12, negative pole; 13, mounting groove; 2, lower plastic; 21, mounting hole; 22, first connecting hole; 23, second connecting hole; 24, conducting hole; 3, trigger switch sensor; 31, first connecting part; 32, first conducting part; 4, air temperature sensor; 41, second connecting part; 42, second conducting part; 5, explosion-proof valve; 6, limiting piece. DETAILED DESCRIPTION

[0024] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and not to limit the present application. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present application are shown in the drawings, rather than all the structures.

[0025] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0026] In the present application, unless otherwise explicitly specified and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or it can include the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical direction of the first feature above and oblique above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical direction of the first feature below and oblique below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0027] In the description of the present embodiment, the terms "upper", "lower", "right", and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, which is only for the convenience of description and simplification of operation, 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 application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0028] Referring to Figures 1 to 3 The utility model provides a top cap subassembly, including top cap sheet 1, lower plastic 2 and mutual electric connection's trigger switch sensor 3 and air temperature sensor 4, top cap sheet 1 is provided with positive pole post 11 and negative pole post 12, lower plastic 2 is connected with top cap sheet 1, trigger switch sensor 3 and air temperature sensor 4 all are arranged in the side of top cap sheet 1 towards lower plastic 2.

[0029] In the embodiment, the top cap subassembly further comprises an explosion-proof valve 5, the explosion-proof valve 5 is arranged in the middle of the top cap sheet 1, the top cap sheet 1 is fixedly connected with the lower plastic 2, the positive pole post 11 and the negative pole post 12 are respectively arranged at two ends of the top cap sheet 1, the trigger switch sensor 3 and the air temperature sensor 4 are respectively arranged on both sides of the explosion-proof valve 5, and the sensing end of the air temperature sensor 4 is arranged towards the lower plastic 2, so as to monitor the air temperature and air pressure around the battery cell (not shown in the figure), the trigger switch sensor 3 is communicatively connected with a control module, so as to control the charge and discharge rate, power and circuit connection of the battery cell.

[0030] In this way, the air temperature sensor 4 can monitor the air temperature and air pressure around the battery cell, thereby realizing real-time monitoring of the battery cell, so that when the state of a single battery cell is abnormal, the air temperature sensor 4 can transmit a signal to the trigger switch sensor 3, and the trigger switch sensor 3 sends a control signal to the control module, and adjusts the charge and discharge rate, power or timely disconnects the circuit connection of the battery cell, so as to ensure the safety and service life of the battery.

[0031] It should be noted that the air temperature sensor 4 can also have the function of monitoring air pressure, and sensors capable of monitoring air temperature and air pressure simultaneously are prior art, which will not be described here.

[0032] It can be understood that the trigger switch sensor 3 and the air temperature sensor 4 can also be respectively arranged at two ends of the explosion-proof valve 5, and the arrangement positions of the trigger switch sensor 3 and the air temperature sensor 4 can be flexibly adjusted, and the trigger switch sensor 3 and the air temperature sensor 4 are arranged on both sides of the explosion-proof valve 5, so as to improve the space utilization rate of the top cap sheet 1 and facilitate real-time monitoring of the battery cell.

[0033] Referring to Figure 2 In some embodiments, one of the trigger switch sensor 3 and the air temperature sensor 4 is electrically connected with the positive pole post 11, and the other is electrically connected with the negative pole post 12.

[0034] In the embodiment, the trigger switch sensor 3 is electrically connected with the negative pole post 12, and the air temperature sensor 4 is electrically connected with the positive pole post 11, so as to form a loop with the negative pole post 12, the trigger switch sensor 3, the air temperature sensor 4 and the positive pole post 11.

[0035] Therefore, the battery cell can supply power to the trigger switch sensor 3 and the air temperature sensor 4, and no additional power supply is needed for the trigger switch sensor 3 and the air temperature sensor 4, thereby saving energy, reducing cost, and facilitating real-time monitoring of the current of the single battery cell. When the battery cell is abnormal, the trigger switch sensor 3 can timely send a signal to the control module.

[0036] It can be understood that the trigger switch sensor 3 can also be electrically connected with the positive pole 11, and the air temperature sensor 4 can also be electrically connected with the negative pole 12, so that the trigger switch sensor 3 and the air temperature sensor 4 can be electrically connected with the battery cell through the positive pole 11 and the negative pole 12, and details are not repeated here.

[0037] Referring to Figure 2 In some embodiments, the top cover sheet 1 is provided with two installation grooves 13, and the trigger switch sensor 3 and the air temperature sensor 4 are respectively detachably arranged in the two installation grooves 13.

[0038] In this embodiment, the installation grooves 13 are stamped and formed on the top cover sheet 1, that is, the top surface of the top cover sheet 1 (that is, the side surface of the top cover sheet 1 away from the lower plastic 2) is protrudingly arranged at positions corresponding to the installation grooves 13, and the trigger switch and the air temperature sensor 4 are respectively clamped in the two installation grooves 13.

[0039] Therefore, the installation grooves 13 can limit the positions of the trigger switch sensor 3 and the air temperature sensor 4 on the top cover sheet 1, so as to avoid the positions of the trigger switch sensor 3 and the air temperature sensor 4 from being deviated when the battery cell is working, thereby affecting the real-time monitoring effect on the battery cell.

[0040] Referring to Figure 1 In some embodiments, the top cover assembly further comprises two limiting members 6, the lower plastic 2 is provided with two installation holes 21 at positions corresponding to the installation grooves 13, the two limiting members 6 are respectively arranged in the two installation holes 21, and the two limiting members 6 are respectively connected with the trigger switch sensor 3 and the air temperature sensor 4.

[0041] The side surface of the trigger switch sensor 3 facing the battery cell and the side surface of the air temperature sensor 4 facing the battery cell are respectively located in the installation hole 21, and the two limiting members 6 are respectively arranged on the inner walls of the installation holes 21 to limit the positions of the trigger switch sensor 3 and the air temperature sensor 4 on the top cover sheet 1.

[0042] Therefore, when the top cover assembly is assembled, after the top cover sheet 1 is connected with the lower plastic 2, the installation hole 21 is butted with the installation groove 13, the trigger switch sensor 3 and the air temperature sensor 4 are respectively arranged in the corresponding installation hole 21 and installation groove 13, and then the trigger switch sensor 3 and the air temperature sensor 4 can be clamped with the lower plastic 2, thereby facilitating the stable real-time monitoring of the air pressure and the air temperature around the battery cell.

[0043] It can be understood that the number of limiters 6 is not limited to two, and the position of the trigger switch sensor 3 and the air temperature sensor 4 on the lower plastic 2 can be limited, which will not be repeated here.

[0044] Referring to Figure 1 In some embodiments, the limiters 6 are buckles, and the length direction of the buckles is parallel to the length direction of the trigger switch sensor 3 or the air temperature sensor 4 connected thereto. In this embodiment, the length direction of the trigger switch sensor 3 and the length direction of the air temperature sensor 4 are both parallel to the length direction of the top cover sheet 1, and the trigger switch sensor 3 and the air temperature sensor 4 are both arranged on the same side of the positive pole column 11.

[0045] In this way, the buckle can stably hold the trigger switch sensor 3 and the air temperature sensor 4, so that they are not easy to fall off from the mounting hole 21 and the mounting groove 13, and the stability of the trigger switch sensor 3 and the air temperature sensor 4 is improved, so that the air temperature sensor 4 can monitor the air temperature and air pressure around the battery cell in real time and send signals to the trigger switch sensor 3 in time.

[0046] It can be understood that the limiters 6 can also be cover plates rotatably arranged in the mounting hole 21, and in this embodiment, the limiters 6 are buckles, which are convenient for installation and enable the sensing end of the air temperature sensor 4 to directly monitor the battery cell, so as to avoid the sensing end of the air temperature sensor 4 being blocked and affecting the monitoring result. The specific structure of the limiters 6 can be adjusted according to actual needs, which will not be repeated here.

[0047] Referring to Figure 1 In some embodiments, one end of the trigger switch sensor 3 away from the air temperature sensor 4 is connected with a first connecting part 31, one end of the air temperature sensor 4 away from the trigger switch sensor 3 is connected with a second connecting part 41, one of the first connecting part 31 and the second connecting part 41 is electrically connected with the positive pole column 11, and the other is electrically connected with the negative pole column 12.

[0048] In this embodiment, the first connecting part 31 and the second connecting part 41 are both L-shaped structures, and the first connecting part 31 and the second connecting part 41 are symmetrically arranged on the lower plastic 2. One end of the first connecting part 31 away from the trigger switch sensor 3 is electrically connected with the negative pole column 12, and one end of the second connecting part 41 away from the air temperature sensor 4 is electrically connected with the positive pole column 11.

[0049] In this way, the trigger switch sensor 3 is electrically connected with the negative pole column 12 through the first connecting part 31, and the air temperature sensor 4 is electrically connected with the positive pole column 11 through the second connecting part 41, so that the space of the top cover sheet 1 and the lower plastic 2 can be fully utilized by the trigger switch sensor 3, the air temperature sensor 4, the positive pole column 11 and the negative pole column 12, and the trigger switch sensor 3 and the air temperature sensor 4 can be stably electrically connected with the battery cell.

[0050] It can be understood that the shape and position of the first connecting part 31 and the second connecting part 41 can be adjusted as needed, and details are not repeated here.

[0051] Referring to Figure 1 In some embodiments, the lower plastic 2 is provided with a first connecting hole 22 and a second connecting hole 23 corresponding to the positions of the first connecting part 31 and the second connecting part 41, respectively, so that the first connecting part 31 can be detachably arranged in the first connecting hole 22, and the second connecting part 41 can be detachably arranged in the second connecting hole 23.

[0052] The first connecting part 31 is arranged in the first connecting hole 22, the second connecting part 41 is arranged in the second connecting hole 23, and the lower plastic 2 is provided with a pole hole (not shown in the figure) for passing through the positive pole 11 and the negative pole 12. The first connecting hole 22 is in communication with the pole hole for mounting the negative pole 12 and the mounting hole 21 for mounting the trigger switch sensor 3 at both ends, respectively, and the second connecting hole 23 is in communication with the pole hole for mounting the positive pole 11 and the mounting hole 21 for mounting the air temperature sensor 4 at both ends, respectively.

[0053] In this way, the first connecting hole 22 and the second connecting hole 23 can limit the positions of the first connecting part 31 and the second connecting part 41 on the lower plastic 2, respectively, to avoid position deviation of the first connecting part 31 and the second connecting part 41 and affect the assembly of the top cover assembly.

[0054] Referring to Figure 1 In some embodiments, one end of the trigger switch sensor 3 towards the air temperature sensor 4 is connected with a first conducting part 32, and one end of the air temperature sensor 4 towards the trigger switch sensor 3 is connected with a second conducting part 42, and the first conducting part 32 is electrically connected with the second conducting part 42.

[0055] The first conducting part 32 and the second conducting part 42 both extend along the length direction of the top cover sheet 1, and the electrical connection of the trigger switch sensor 3 and the air temperature sensor 4 is realized by arranging the first conducting part 32 and the second conducting part 42.

[0056] In this way, the trigger switch sensor 3 and the air temperature sensor 4 can be arranged at intervals, the sensing end of the air temperature sensor 4 can be arranged at a position convenient for monitoring the temperature and air pressure of the battery cell, and stable electrical connection between the air temperature sensor 4 and the trigger switch sensor 3 can be maintained.

[0057] Referring to Figure 1In some embodiments, the lower plastic 2 is provided with a conductive hole 24 corresponding to the positions of the first conductive part 32 and the second conductive part 42, and the first conductive part 32 and the second conductive part 42 are detachably arranged in the conductive hole 24. The conductive hole 24 is arranged between the two mounting holes 21, and the two ends of the conductive hole 24 are respectively communicated with the two mounting holes 21, so that the first conductive part 32 and the second conductive part 42 are clamped in the conductive hole 24.

[0058] In this way, the conductive hole 24 can limit the positions of the first conductive part 32 and the second conductive part 42 on the lower plastic 2, improve the stability of the trigger switch sensor 3 and the air temperature sensor 4, so as to monitor the single battery cell in real time, and control the charging and discharging rate or disconnect the circuit in time when the battery cell is abnormal, thereby improving the safety and stability of the battery cell.

[0059] It can be understood that the first connecting hole 22, the second connecting hole 23 and the conductive hole 24 can also be provided with a limiting piece 6 to further limit the first connecting part 31, the first conductive part 32, the second connecting part 41 and the second conductive part 42.

[0060] Further, the trigger switch sensor 3, the air temperature sensor 4, the first connecting part 31, the first conductive part 32, the second connecting part 41 and the second conductive part 42 are all embedded in the lower plastic 2, that is, the lower plastic 2 is protrudingly arranged, so as to avoid the contact between the electrolyte and the above-mentioned structure and affect the normal work of the trigger switch sensor 3 and the air temperature sensor 4.

[0061] It can be understood that the mounting hole 21, the first connecting hole 22, the second connecting hole 23 and the conductive hole 24 can also be covered with a film for blocking the electrolyte.

[0062] Referring to Figure 1 The utility model also provides a battery, including battery cell, shell (not shown in drawing) and top cover assembly, top cover sheet 1 is connected with shell and forms the space for containing battery cell.

[0063] In the embodiment, the battery cell is arranged in the shell, the top cover sheet 1 is fixedly connected with the shell, and the trigger switch sensor 3 and the air temperature sensor 4 are both arranged towards the battery cell.

[0064] Obviously, the above-mentioned embodiments of the utility model are only for clear illustration of the utility model, and are not the limitation of the implementation mode of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be carried out without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A cap assembly, characterized by, The utility model relates to a top cover assembly of lithium ion battery, including: The top cover sheet (1) is provided with positive pole column (11) and negative pole column (12) on it; The lower plastic (2) is connected with the top cover sheet (1); The trigger switch sensor (3) and the air temperature sensor (4) are electrically connected with each other, and both are arranged on the side of the top cover sheet (1) towards the lower plastic (2).

2. The roof assembly of claim 1, wherein, One of the trigger switch sensor (3) and the air temperature sensor (4) is electrically connected with the positive pole column (11), and the other is electrically connected with the negative pole column (12).

3. The roof assembly of claim 1, wherein, The top cover sheet (1) is provided with two installation grooves (13), and the trigger switch sensor (3) and the air temperature sensor (4) are respectively detachably arranged in the two installation grooves (13).

4. The roof assembly of claim 3, wherein, The top cover assembly further includes two limit pieces (6), the lower plastic (2) is provided with two installation holes (21) corresponding to the positions of the installation grooves (13), two limit pieces (6) are respectively arranged in the two installation holes (21), and the two limit pieces (6) are respectively connected with the trigger switch sensor (3) and the air temperature sensor (4).

5. The roof assembly of claim 4, wherein, The limit piece (6) is a buckle, and the length direction of the buckle is parallel to the length direction of the trigger switch sensor (3) or the air temperature sensor (4) connected with the buckle.

6. The roof assembly of any of claims 1-5, wherein, The end of the trigger switch sensor (3) away from the air temperature sensor (4) is connected with a first connecting part (31), the end of the air temperature sensor (4) away from the trigger switch sensor (3) is connected with a second connecting part (41), one of the first connecting part (31) and the second connecting part (41) is electrically connected with the positive pole column (11), and the other is electrically connected with the negative pole column (12).

7. The roof assembly of claim 6, wherein, The lower plastic (2) is provided with a first connecting hole (22) and a second connecting hole (23) corresponding to the positions of the first connecting part (31) and the second connecting part (41) respectively, so that the first connecting part (31) can be detachably arranged in the first connecting hole (22), and the second connecting part (41) can be detachably arranged in the second connecting hole (23).

8. The roof assembly of any of claims 1-5, wherein, The end of the trigger switch sensor (3) towards the air temperature sensor (4) is connected with a first conducting part (32), the end of the air temperature sensor (4) towards the trigger switch sensor (3) is connected with a second conducting part (42), and the first conducting part (32) is electrically connected with the second conducting part (42).

9. The roof assembly of claim 8, wherein, The lower plastic (2) is provided with a conducting hole (24) corresponding to the positions of the first conducting part (32) and the second conducting part (42), and the first conducting part (32) and the second conducting part (42) are detachably arranged in the conducting hole (24).

10. A battery, characterized by The utility model relates to a top cover assembly of lithium ion battery, including:

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