Battery with state transmission connector

Abstract

The utility model discloses a battery with a state transmission connector. The battery comprises a pole sealing assembly, a battery core internal state connector, a connecting sheet, a roll core assembly, an expansive force sensor, a temperature sensor, an internal resistance sensor and an aluminum shell for accommodating a battery core, a connecting sheet is welded and fixedly arranged at the top of the tab and is welded with the post terminal; the pole sealing assembly comprises a cover plate and a bracket, the cover plate and the bracket are respectively provided with an accommodating groove, and a connector and a signal input wire harness accommodated in the accommodating groove of the cover plate are respectively connected with an expansive force sensor, a temperature sensor and an internal resistance sensor of the battery cell; according to the utility model, transmission is carried out through wire plugging, so that the influence of other physical change factors is reduced; a reliable sealing environment is provided, so that external dust is prevented from entering the battery while electrolyte is prevented from overflowing and intruding into a metal part; and the plug-in type connector is used for data transmission, so that the stability of data transmission is improved, and the cost is reduced compared with a data processing chip.

Description

Technical Field

[0001] The utility model relates to the technical field related to energy storage power batteries, and in particular to a battery with a state transmission connector. Background Art

[0002] Batteries such as energy storage power have been widely used as a form of energy. The technology of energy batteries is relatively mature and has the characteristics of long life, pollution-free, and reusable. However, in the application process of energy batteries, there are still problems such as performance degradation, thermal runaway, overcharging, over-discharging, short circuit, extrusion, overheating, etc., which lead to safety accidents caused by the failure of the core assembly, resulting in major safety accidents such as fires in energy storage power stations and spontaneous combustion of trams. Since the failure mechanism of batteries is unclear, it is necessary to develop methods for in-situ real-time monitoring of the transmission of multiple parameters inside the battery, and to establish a physical parameter in the battery that affects battery degradation and an external visualization device to associate it. Therefore, it is necessary to monitor the health status of the core assembly in real time, and it is of great significance to predict the alarm of battery cell out of control in advance.

[0003] An existing power battery and its health assessment method, patent number is CN202311131033.5, a power battery and its health assessment method. The power battery includes a core assembly, an expansion force sensor, a temperature sensor and an internal resistance sensor, and the expansion force sensor, the temperature sensor and the internal resistance sensor are all electrically connected to the core assembly, wherein: the expansion force sensor is used to collect the expansion force of the core assembly and evaluate the health status of the power battery based on the expansion force; the temperature sensor is used to collect the temperature of the core assembly and evaluate the health status of the power battery based on the temperature; the internal resistance sensor is used to collect the internal resistance of the characteristic position of the core assembly and evaluate the health status of the power battery based on the internal resistance.

[0004] The above-mentioned power battery uses a processor (that is, a chip) to collect the above-mentioned expansion force, internal resistance, and temperature and transmit them to the outside. There will be some lag in the changes, resulting in low accuracy of the information obtained. The technical solution for monitoring the accuracy of battery information is particularly important. At the same time, since the temperature, pressure, volume, and material inside the battery will change during the use of the battery cell, it is possible that the processor will fail when facing the parameter threshold, such as pressure on the battery core, temperature increase, material changes, etc., which may cause the processor to fail.

[0005] An existing battery monitoring system and battery, application number 202311063037.4, uses a data processing device to collect and transmit battery information, but can only perform threshold alarms and cannot be converted into real-time observable information. The data transmission channel is only responsible for transmitting the signal to the data processing device.

[0006] There is also a battery with the application number 202321965532.X. The way its data is sent is also achieved through a wireless transmitter. However, the general working environment of the battery and the possible physical changes it may undergo will cause data transmission errors or even prevent normal transmission in the above-mentioned wireless transmitter. In addition, the sealing method of the information collection device uses a sealed housing, and the sealing environment it can provide is not reliable. At the same time, the sealed housing may also affect the strength of the signal output by the wireless transmitter, and the high cost of the wireless transmitter will lead to an increase in the manufacturing cost of the battery. Summary of the Invention

[0007] The purpose of the present invention is to provide a battery with a state transmission connector to overcome the deficiencies in the prior art.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A battery with a state transmission connector includes a pole column sealing assembly, a winding core assembly, an expansion force sensor, a temperature sensor, an internal resistance sensor, and an aluminum shell. An ear is led out from the top of the winding core assembly, and a pole column is fixedly embedded in the pole column sealing assembly. The expansion force sensor, the temperature sensor, and the internal resistance sensor are all electrically connected to the winding core assembly. It is characterized in that a connecting piece is fixedly welded to the top of the ear, and the connecting piece is welded to the pole column. The pole column sealing assembly includes a cover plate, a sealing ring, and a bracket. The cover plate and the bracket are respectively provided with corresponding downwardly recessed receiving grooves. The receiving groove of the cover plate houses a connector. The bracket is fixedly arranged at the bottom of the cover plate. The connector includes a plugging hole, and a signal input wire harness is fixedly plugged in the plugging hole. The signal input wire harness is respectively connected to the expansion force sensor, the temperature sensor, and the internal resistance sensor.

[0010] Further elaborating, the bracket is made of insulating plastic and is arranged between the cover plate and the winding core assembly to prevent conduction between the cover plate and the connecting piece. The receiving groove of the bracket is a recess inward of the bracket and extends out a bearing frame, and the extended part of the cover plate is placed in the bearing frame. The connector is provided with an annular flange extending to the outer peripheral side, and the cover plate extends a limiting buckle to limit the position of the connector, and the extended limiting buckle forms the receiving groove of the cover plate.

[0011] Further elaboration is as follows. The connector is installed in the receiving groove of the cover plate. An insulating ring is provided on the connector, and a pressure plate is covered on the insulating ring. The pressure plate covers the insulating ring and the edge of the connector. After the pressure plate presses and fixes the connector, the outer circular surface of the pressure plate is welded to the cover plate. The connector includes a terminal sleeve, insulating plastic, and a metal elastic sheet capable of transmitting signals. The terminal sleeve wraps and fixes the insulating plastic. The insulating plastic is provided with a through insertion hole up and down. A sealing ring is wrapped and fixed on the lower outer side of the terminal sleeve, and the sealing ring adheres to the wall of the receiving groove. A metal elastic sheet is fixedly arranged inside the terminal sleeve. The insulating plastic is used to isolate the conduction between the terminal sleeve and the metal elastic sheet. The inner port of the insertion hole is inserted with a signal input wire harness. The signal input wire harness is provided with a pin extending upward, and a sealant is arranged at the tail end of the pin. The metal elastic sheets are arranged inside the insulating plastic in the terminal sleeve. The adjacent metal elastic sheets form a buckle end, and the buckle end is located inside the insulating plastic and is used for the insertion of the pin.

[0012] Further elaboration is as follows. A first temperature acquisition end is arranged at the ultrasonic welding position of the tab of the core assembly and the connecting piece. Second temperature acquisition ends are arranged at the laser welding positions of the connecting piece and the lower end face of the pole column of the pole column sealing assembly. A third temperature acquisition end is arranged at the middle position on the side of the multi-core assembly. The signal input wire harness is electrically connected to the first temperature acquisition end, the second temperature acquisition end, and the third temperature acquisition end, and transmits the data signals collected by each temperature acquisition end to the corresponding position of the connector.

[0013] Further elaboration is as follows. There are a pole column sealing assembly, a core assembly, and a housing. The core assembly is arranged inside the housing. The expansion force sensor includes a third transmission line, a fourth transmission line, and multiple expansion force acquisition ends. The third transmission line is connected to multiple expansion force acquisition ends and is used to obtain the expansion forces collected by the multiple expansion force acquisition ends. One end of the fourth transmission line is connected to the third transmission line, and the other end is connected to the signal input wire harness. The signal input wire harness is connected to the transmission connector. The multiple expansion force acquisition ends are fixed around the middle end face on the side of the core assembly by adhesive stickers to collect the expansion pressures during the charging and discharging processes of the battery cells at multiple positions and detect the expansion force condition of the battery module.

[0014] Further elaboration is as follows. The internal resistance sensor includes an internal resistance acquisition end, a first transmission line, and a second transmission line. A first internal resistance acquisition end is arranged at the ultrasonic welding position of the tab of the core assembly and the connecting piece. A second internal resistance acquisition end is arranged at the laser welding position of the connecting piece and the lower end face of the pole column of the pole column sealing assembly. The signal input wire harness is electrically connected to the first internal resistance acquisition end and the second internal resistance acquisition end respectively to transmit the data signals collected by each internal resistance acquisition end to the corresponding input port set on the connector by plugging.

[0015] Further elaboration is as follows. The signal input wire harness includes multiple transmission lines, which are respectively connected to multiple expansion force acquisition ends, temperature acquisition ends, and internal resistance acquisition ends. The acquisition ends are used to respectively obtain multiple expansion force, temperature, and internal resistance data; the transmission lines are used to input the data collected by multiple acquisition ends corresponding to different acquisition ends into the connector.

[0016] Further elaboration is as follows. It includes ultrasonic welding of the positive and negative tab ears of the core corresponding to the positive and negative connection pieces, and then laser welding of the positive and negative connection pieces corresponding to the lower end faces of the positive and negative poles of the pole column sealing assembly; a first internal resistance acquisition end and a first temperature acquisition end are arranged at the welding position of the tab ear and the connection piece, and a second internal resistance acquisition end and a second temperature acquisition end are arranged at the welding position of the connection piece and the lower end face of the pole column. The data signals collected by the internal resistance and temperature acquisition ends are input to the corresponding positions of the connector through the transmission lines.

[0017] Further elaboration is as follows. The tab ears include a positive tab ear and a negative tab ear, and the connection pieces include a positive connection piece and a negative connection piece; the positive tab ear and the negative tab ear are ultrasonically welded to the positive connection piece and the negative connection piece correspondingly, and the positive connection piece and the negative connection piece are respectively laser welded to the lower end faces of the positive pole column and the negative pole column arranged by the pole column sealing assembly correspondingly.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. The present utility model provides a battery with data collection and a connector, which collects battery state parameters and then reliably transmits them to external devices in real time. It is input into the corresponding input ports of the plug-in connector through the sensor wire harness for transmission, reducing the influence of other physical and chemical change factors inside the battery cell.

[0020] 2. It has reliable sealing performance, avoiding the overflow of electrolyte outside the battery cell housing, and effectively preventing external substances from entering the battery interior.

[0021] 3. Using a plug-in connector for data transmission effectively improves the reliability of data transmission, and at the same time can reduce the overall manufacturing cost of the battery, increasing the profit margin and market share. The cost is reduced relative to the data processing chip. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the sensor arrangement of the battery cell of the present utility model;

[0023] Figure 2 It is a schematic diagram of the sensor arrangement structure of the battery cell and the pole column sealing assembly of the present utility model;

[0024] Figure 3 It is a cross-sectional view of the battery cell of the present utility model;

[0025] Figure 4This is a schematic structural diagram of the connector of the present utility model;

[0026] Figure 5 This is a partial cross-sectional view of the pole sealing assembly in the present utility model.

[0027] Explanation of the reference numerals in the attached drawings:

[0028] 1. Core assembly; 2. Cover plate; 3. Bracket; 4. Accommodating groove; 5. Limit buckle; 6. Carrying frame; 7. Signal input wire harness; 8. Sealant; 9. Pin; 10. Insertion hole; 11. Metal elastic sheet; 12. Insulating plastic; 13. Terminal sleeve; 14. Sealing ring; 15. Insulating ring; 17. Fixed adhesive tape; 18. Temperature acquisition end; 19. First transmission line; 20. Second transmission line; 21. Fourth transmission line; 23. Expansion force acquisition end; 24. Third transmission line; 25. Connection piece; 26. Pole sealing assembly; 27. Internal resistance acquisition wire harness; 28. Internal resistance acquisition end; 29. Second temperature acquisition end; 30. Connector; 31. Pressure plate; 32. Temperature sensor; 33. Expansion force sensor; 34. Internal resistance sensor; 35. Temperature acquisition wire harness; 36. Input / output port; 37. Port positioning part; 38. Annular flange; 39. Inner fixing ring; 40. Pole; 41. Upper plastic. Detailed implementation manners

[0029] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. When the number of an element is referred to as having "a plurality", it can be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manner.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model herein are for the purpose of describing specific embodiments only and are not intended to limit this utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0032] The following provides a detailed description of this utility model in conjunction with the various embodiments shown in the accompanying drawings:

[0033] As Figures 1-5 shown, in this embodiment, a power battery is provided, which includes a core assembly 1, an expansion force sensor 33, a temperature sensor 32, a pole column sealing assembly 26, and an internal resistance sensor 34. The top of the core assembly 1 is led out with tabs, and the pole column sealing assembly 26 is fixedly embedded with a pole column. The expansion force sensor 33, the temperature sensor 32, and the internal resistance sensor 34 are all electrically connected to the core assembly 1.

[0034] According to the number of core assemblies 1, the power battery can be a single-core assembly 1 battery, a dual-core assembly 1 battery, or a multi-core assembly 1 battery. The core package manufacturing processes include winding, stacking, etc. Unless otherwise specified, the structure of one core assembly 1 will be used as an example for introduction below.

[0035] The expansion force sensor 33 is used to collect the expansion force of the core assembly 1 and evaluate the health status of the power battery according to the expansion force. The temperature sensor 32 is used to collect the temperature of the core assembly 1 and evaluate the health status of the power battery according to the temperature. The internal resistance sensor 34 is used to collect the internal resistance at the characteristic position of the core assembly 1 and evaluate the health status of the power battery according to the internal resistance. Therefore, the health status of the battery can be evaluated by collecting the expansion force, temperature, and internal resistance at the characteristic position of the core assembly 1 through multiple sensors respectively, so that the safety status of the core assembly 1 can be monitored in real time and the safety risk of the core assembly 1 can be reduced.

[0036] Optionally, the power battery includes a housing, and the winding core assembly 1 is disposed inside the housing. The housing can be a wound square aluminum shell, a cylinder, a stacked square aluminum shell, etc. The housing serves as a protective shell for the winding core assembly 1, and in this embodiment, the housing is optionally an aluminum shell. It is usually in close contact with the winding core assembly 1, that is, the winding core assembly 1 contacts the inner sidewall of the housing. When the winding core assembly 1 expands due to reasons such as heat generation, the winding core assembly 1 exerts extrusion on the housing. In this embodiment, the expansion force of the winding core assembly 1 is collected by collecting this extrusion force. Specifically, the expansion force sensor 33 includes a plurality of expansion force collection ends 23, a third transmission line 24, and a fourth transmission line 21. Among them, the plurality of expansion force collection ends 23 are disposed between the winding core assembly 1 and the housing and are located at multiple positions of the winding core assembly 1. Specifically, the expansion force collection ends 23 surround the circumferential side of the winding core assembly 1 and are used to collect the pressure between the expanded winding core assembly 1 and the housing at multiple positions as the expansion force. The third transmission line 24 is connected to the plurality of expansion force collection ends 23 and is used to obtain the expansion forces collected by the plurality of expansion force collection ends 23. One end of the fourth transmission line 21 is connected to the third transmission line 24, and the other end is connected to the signal input wire harness 7. The signal input wire harness 7 is connected to the connector 30 and is used to transmit the plurality of expansion forces obtained by the third transmission line 24 to the outside through the connector 30.

[0037] In a specific embodiment, the expansion force sensor 33 can adopt an optical fiber sensor, the inside of which is a silica optical fiber layer, and the outside is a polyimide polymer material coating. The expansion force collection end 23 can be a patch type structure and is attached to the outer sidewall of the winding core assembly 1. The third transmission line 24 is wound around the outer sidewall of the winding core assembly 1, and the expansion force collection end 23 is disposed between the outer sidewall of the winding core assembly 1 and the third transmission line 24. The third transmission line 24 serves to transmit the expansion forces collected by each expansion force collection end 23 on the one hand, and can also fix the expansion force collection end 23 on the other hand. Further, in order to fix the third transmission line 24, a fixing adhesive patch 17 is also provided. Specifically, the fixing adhesive patch 17 is pasted on the outer surface of the third transmission line 24 and is bonded to the expansion force collection end 23. For example, an adhesive, etc., fixes the third transmission line 24 on the outer sidewall of the winding core assembly 1. The plurality of expansion force collection ends 23 are fixed around the middle end face on the side of the winding core assembly by the adhesive patch 17 to collect the expansion pressure during the charge and discharge process of the battery cells at multiple positions and detect the expansion force condition of the battery module.

[0038] The above describes collecting the expansion force of the core component 1 by collecting the extrusion force between the core component 1 and the housing. In other embodiments, the expansion force can also be collected by the extrusion of the core component 1 on the collection end during expansion. Specifically, the expansion force collection end 23 of the expansion force sensor 33 can collect a coil, which is wound around the outer periphery of the core component 1 and has elasticity, and is used to collect the elastic force caused by the expansion of the core component 1 that stretches the collection coil. This elastic force serves as the expansion force. One end of the third transmission line 24 is connected to the collection coil, and the other end is connected to the signal input wire harness 7, and is used to transmit the expansion force collected by the collection coil to the outside through the connector 30. It can be understood that the structure and function of the third transmission line 24 are the same as those of the fourth transmission line 21 described above.

[0039] Furthermore, the elastic force of the stretched collection coil can be positively correlated with the resistance value of the collection coil. That is, the expansion force collection end 23 collects the change value of the resistance value of the collection coil when it undergoes elastic deformation, and transmits this resistance value change to the signal input wire harness 7 through the third transmission line 24.

[0040] Optionally, the temperature sensor 32 can adopt a thermocouple sensor, and the inside is a thermocouple. The temperature sensor 32 includes a temperature collection end 18, a first transmission line 19, and a second transmission line 20. Among them, the temperature collection end 18 is a spiral structure, which is arranged on the side surface of the core component 1 and is used to collect the temperatures at multiple positions on this side surface. One end of the first transmission line 19 is connected to the temperature collection end 18, and the other end is connected to the second transmission line 20. The signal input wire harness 7 is connected to the second transmission line 20, and is used to transmit the temperature parameter obtained by the first transmission line 19 to the outside through the connector 30. By setting the temperature collection end 18 as a spiral structure, the contact surface between the temperature collection end 18 and the core component 1 can be increased, and the error of fewer sampling points during temperature measurement can be reduced. Among them, the coiling interval inside the spiral can be adjusted according to the detection needs. For example, when the side area of the core component 1 to be measured is small, the interval can be set smaller to ensure the number of collected temperatures. When the side area of the core component 1 to be measured is large, the interval can be set larger to ensure that the temperatures in a larger position range of the core component 1 can be collected.

[0041] In this embodiment, a first temperature collection end is provided at the ultrasonic welding joint of the tab of the core component and the connecting piece 25, and a second temperature collection end is provided at the laser welding joint of the connecting piece 25 and the lower end surface of the pole column of the pole column sealing component. That is to say, a third temperature collection end is provided at the middle position of the side surface of the multi-core component. The signal input wire harness 7 is electrically connected to the first temperature collection end, the second temperature collection end, and the third temperature collection end, and transmits the data signals collected by each temperature collection end to the corresponding connector.

[0042] Furthermore, fixing stickers 17 are arranged in an annular array on the spiral line for fixing the spiral line (i.e., the temperature acquisition end 18). Each single fixing sticker 17 fixes multiple spiral lines in the winding direction of the spiral line, and fixes the entire spiral line as a whole at different positions, fixing the spiral line on the core assembly 1.

[0043] The temperature acquisition end 18 is arranged on the side surface of the core assembly 1 with the largest area. When the core assembly 1111 is a cuboid or a structure similar to a cuboid, there are two side surfaces with the largest area, and the temperature acquisition end 18 can be arranged on these two side surfaces.

[0044] Optionally, when the core assembly 1 includes at least two, that is, the core assembly 1 is a dual-core assembly 1, in this structure, the temperature acquisition end 18 is arranged between two adjacent core assemblies 1 and is respectively connected to the side surfaces of two adjacent core assemblies 1.

[0045] Optionally, the battery includes tabs electrically connected to the core assembly 1. The tabs include a positive tab and a negative tab, and the positive tab and the negative tab are insulated from each other by an insulating film. The welding scheme of the tabs is: welding the positive and negative tabs of the wound or laminated core assembly 1 with a 6mm*16mm round-tooth welding head or a spiral welding head. The tabs include a positive tab and a negative tab, and the connecting piece 25 includes a positive connecting piece and a negative connecting piece; the positive tab and the negative tab are ultrasonically welded to the positive connecting piece and the negative connecting piece respectively, and the positive connecting piece and the negative connecting piece are respectively laser welded to the lower end surfaces of the positive electrode post and the negative electrode post provided by the electrode post sealing assembly.

[0046] The positive and negative tabs of the core are ultrasonically welded to the positive and negative connecting pieces respectively, and the positive and negative connecting pieces are laser welded to the lower end surfaces of the positive and negative electrode posts of the electrode post sealing assembly respectively; a first internal resistance acquisition end and a first temperature acquisition end are arranged at the welding position of the tab and the connecting piece 25, and a second internal resistance acquisition end and a second temperature acquisition end are arranged at the welding position of the connecting piece 25 and the lower end surface of the electrode post. The data signals collected by the internal resistance and temperature acquisition ends are input to the corresponding positions of the connector by a transmission line. The transmission line refers to a part of the signal transmission lines in the signal input wire harness 7.

[0047] During normal battery use, the positive electrode tab and the negative electrode tab are in an open-circuit state, and the difference in their internal resistances tends to be infinitely large. If a micro-short circuit occurs between the positive electrode tab and the negative electrode tab, the difference in their internal resistances will be less than a preset internal resistance threshold. Herein, a micro-short circuit refers to a minor short-circuit phenomenon that occurs between the internal winding core assemblies 1 of the power battery or within a single winding core assembly 1. Such a short circuit will not directly burn out the battery, but will reduce the performance of the winding core assembly 1 within a relatively short period (several weeks or months), resulting in a single winding core assembly 1 or the entire battery pack being completely inoperable. The structures of the positive electrode tab and the negative electrode tab are exactly the same. Without special instructions, the structure of one tab will be used as an example for the following introduction.

[0048] The internal resistance sensor 34 can be a thermocouple sensor, and its internal part is a thermocouple. The internal resistance sensor 34 includes a pair of internal resistance acquisition ends 28 and an internal resistance acquisition wire harness 27 arranged at the pole column sealing assembly 26. The internal resistance acquisition wire harness 27 is connected to the signal input wire harness 7. The above-mentioned pair of internal resistance acquisition ends 28 are respectively connected to the positive electrode tab and the negative electrode tab. The internal resistance acquisition wire harness 27 is connected to this pair of internal resistance acquisition ends 28. The internal resistance acquisition wire harness 27 is used to transmit the internal resistance between the positive electrode tab and the negative electrode tab collected to the signal input wire harness 7 connected to the signal connector 30, and is conducted to the outside through the signal connector 30 for viewing. Thus, the internal resistance value between the positive electrode tab and the negative electrode tab can be monitored in real time by an external device to evaluate whether a micro-short circuit has occurred between the positive electrode tab and the negative electrode tab. Specifically, a pair of internal resistance acquisition ends 28 include a first internal resistance acquisition end and a second internal resistance acquisition end. The first internal resistance acquisition end is provided at the ultrasonic welding joint of the tab and the connecting piece, and the second internal resistance acquisition end is provided at the laser welding joint of the connecting piece and the lower end face of the pole column of the pole column sealing assembly. The signal input wire harnesses are respectively electrically connected to the first internal resistance acquisition end and the second internal resistance acquisition end to be used for transmitting the data signals collected by each internal resistance acquisition end to the input ports correspondingly provided on the connector.

[0049] A second temperature acquisition end 29 is also provided at the top of the winding core assembly 1 to monitor the temperature of the winding core assembly 1. The second temperature acquisition end 29 is fixedly provided at the bottom of the connecting piece 25, specifically located between the connecting piece 25 and the winding core assembly 1. The second temperature acquisition end 29 is connected with a temperature acquisition wire harness, and the temperature acquisition wire harness can transmit the data collected by the second temperature acquisition end 29 into the signal input wire harness 7. The second temperature acquisition end 29 is also connected with a temperature acquisition wire harness 35. The temperature acquisition wire harness 35 can transmit the temperature data in the second temperature acquisition end 29 to the signal input wire harness 7, and then is transmitted to an external visualization device through the connector 30.

[0050] The pole column sealing assembly 26 is fixedly provided with a pole column (including positive and negative poles). The winding core assembly 1 is fixedly provided with pole tabs. A connecting piece 25 is fixedly welded to the top of the pole tab. The connecting piece 25 is welded to the pole column. A pair of internal resistance acquisition terminals 28 and temperature acquisition terminals 29 are arranged at the welding joint of the pole tab and the connecting piece 25. A second internal resistance acquisition terminal and a second temperature acquisition terminal are arranged at the welding joint of the connecting piece and the lower end face of the pole column. The internal resistance acquisition terminals and the temperature acquisition terminals are all connected to the connector through a signal input wire harness.

[0051] The pole column sealing assembly 26 includes a cover plate 2 and a bracket 3. The cover plate 2 and the bracket 3 are respectively provided with corresponding downwardly concave receiving grooves 4. Here, the corresponding means that the positions of the receiving grooves 4 provided on the cover plate 2 and the bracket 3 correspond to each other, so that the receiving grooves 4 between the two can be correspondingly overlapped during assembly. Specifically, the receiving groove 4 of the bracket 3 has a larger space than the receiving groove 4 of the cover plate 2. The receiving groove 4 of the cover plate 2 is used to accommodate the connector. The connector can plug in data lines, electrical signal transmission lines and signal transmission wire harnesses to perform signal input and output. The receiving groove 4 of the bracket 3 needs to have enough space to accommodate the part of the cover plate extending downward. The bracket 3 is fixedly arranged at the bottom of the cover plate 2. The bracket 3 is made of plastic. The bracket 3 is arranged between the cover plate 2 and the winding core assembly 1. The purpose of the bracket 3 is to support the cover plate 2 and prevent conduction between the cover plate 2 and the connecting piece 25, mainly playing a role of isolation.

[0052] Specifically, preferably, the receiving groove 4 of the bracket 3 is recessed inward by the bracket 3 and extends to form a bearing frame 6, and the part formed by the extension of the cover plate 2 will be placed in this bearing frame 6. The part formed by the extension of the cover plate 2 refers to the part recessed to form the receiving groove 4.

[0053] In this embodiment, after the connector is installed in the receiving groove 4 of the cover plate 2, a pressure plate 31 is further covered on the connector. The pressure plate 31 covers the edge of the connector. After the pressure plate 31 presses and fixes the connector, the outer circular surface of the pressure plate 31 is welded to the cover plate 2, including that a part of the bottom surface of the pressure plate 31 is welded to the cover plate 2. Specifically, the connector includes a terminal sleeve 13 and an insulating ring 15. The insulating ring 15 is coated on the outer side of the upper half of the terminal sleeve 13 for insulation purposes, so that the pressure plate 31 abuts against the cover plate 2 and the insulating ring 15 during welding and is welded and fixed. The pressure plate 31 is welded to the cover plate 2 and the connector. After the connector is installed in the receiving groove 4 of the cover plate 2, a certain size of welding groove is reserved. The welding groove is formed between the connector and the cover plate 2 after the connector is installed. Because the connector needs to perform plugging and unplugging of external data lines, the provided pressure plate 31 can effectively limit the position of the connector and avoid the connector from moving when the data line is pulled out. At the same time, the pressure plate 31 can reduce the risk of external dust entering the edge of the connector.

[0054] Specifically, after the transmission terminal is installed in the receiving groove 4 of the cover plate 2, a pressure plate 31 is further covered on the transmission terminal. The pressure plate 31 covers the edge of the transmission terminal. After the pressure plate 31 presses and fixes the transmission terminal, the outer circular surface of the pressure plate 31 is welded to the cover plate 2, including that a part of the bottom surface of the pressure plate 31 is welded to the cover plate 2. Specifically, a counterbore is provided on the cover plate 2, and the surface of the pressure plate 31 is welded to the counterbore of the cover plate 2. The bottom of the pressure plate 31 abuts against the upper surface of the insulating ring (mentioned below); further elaborating, the upper surface of the insulating ring is arranged coplanarly with the bottom surface of the counterbore. After the pressure plate 31 presses the upper surface of the insulating ring down to be flush with the bottom surface of the counterbore by an external force, it is welded to the cover plate 2.

[0055] The transmission terminal includes a terminal sleeve 13. An insulating sleeve 15 is sleeved on the side wall of the terminal sleeve 13 near the top end. An integrally formed insulating ring extending outward is further provided on the outer side wall of the insulating sleeve 15 near the bottom. The bottom surface of the insulating ring abuts against the upper surface of the annular flange 38 of the terminal sleeve 13; a counterbore is provided on the cover plate 2, and the surface of the pressure plate 31 is welded to the counterbore of the cover plate 2. The bottom of the pressure plate 31 abuts against the upper surface of the insulating ring.

[0056] In this embodiment, the connector includes a terminal sleeve 13, an insulating plastic 12 and a metal elastic sheet 11. The insulating plastic 12 is provided with an insertion hole 10 penetrating up and down. The terminal sleeve 13 wraps and fixes the insulating plastic 12. Specifically, the insulating plastic 12 is fixedly arranged inside the terminal sleeve 13, and the insulating plastic 12 is fixed and limited in the pole sealing assembly 26 through the terminal sleeve 13. A sealing ring 14 is fixedly arranged on the outer side of the terminal sleeve 13. When the terminal sleeve 13 is installed in the receiving groove 4 of the cover plate 2, the sealing ring 14 will be completely tightly attached to the groove wall of the receiving groove 4. The setting of the sealing ring 14 can effectively prevent the internal electrolyte of the battery from leaking. A metal elastic sheet 11 is fixedly arranged inside the terminal sleeve 13. The insulating plastic 12 can isolate the conduction between the terminal sleeve 13 and the metal elastic sheet 11. The provided insertion hole 10 is used for inserting the end of the internal signal input wire harness 7 and the data line of the external visualization device. Among them, a sealing glue 8 is filled in the insertion hole 10 facing the inside of the battery. Specifically, after the end of the signal input wire harness 7 is inserted into the insertion hole 10, the sealing glue 8 is filled. That is to say, the sealing glue 8 includes the tail end of the pin 9 mentioned below. The setting of the sealing glue 8 can effectively prevent the internal electrolyte from invading the insertion hole 10 of the terminal sleeve 13.

[0057] In this embodiment, a signal input wire harness 7 is fixedly inserted into the insertion hole 10. The signal input wire harness 7 is respectively and electrically connected to the expansion force sensor 33, the temperature sensor 32, and the internal resistance sensor 34; the input and output wires of each sensor are twisted together to avoid chaos of multiple wires inside the battery. Multiple transmission lines are respectively connected to multiple expansion force, temperature, and internal resistance acquisition ends, and each acquisition end respectively obtains multiple expansion force, temperature, and internal resistance data; the data collected by multiple acquisition ends corresponding to different transmission lines are input into the connector through multiple corresponding transmission lines. The expansion force, temperature, and internal resistance sensors are respectively composed of the acquisition end, the transmission line, and the connection transmission line, and the corresponding signals are connected to the connector correspondingly.

[0058] Please refer to Figure 4 As shown, the terminal sleeve 13 is provided with an annular flange 38 extending towards the outer peripheral side, and the cover plate 2 extends a limiting buckle 5 to limit the position of the terminal sleeve 13; the specific position limited is the annular flange 38 provided on the terminal sleeve 13, and the extended limiting buckle 5 forms a receiving groove 4 of the cover plate 2. The cover plate 2 extends a limiting buckle 5 to limit the position of the terminal sleeve 13. The extended limiting buckle 5 forms a receiving groove 4 of the cover plate 2. The annular flange 38 is disposed around the outer periphery of the terminal sleeve 13; an inner fixing ring 39 protruding towards the inner diameter is provided inside the annular flange 38 of the terminal sleeve 13 for clamping the insulating plastic during the in-mold forming of the insulating plastic. In this embodiment, the terminal sleeve 13 is provided with six insertion holes 10, and a sealing glue 8 is fixedly provided at one end of each of the six insertion holes 10 facing the inside of the battery, and the signal input wire harness 7 is also fixedly inserted into the insertion holes 10 through the sealing glue 8. Specifically, the signal input wire harness 7 is provided with a pin 9 extending upwards, and metal elastic pieces 11 are arranged inside the terminal sleeve 13, and adjacent metal elastic pieces 11 form a buckle end, and the pin 9 will be inserted into the above-mentioned buckle end, and the buckle end located between adjacent metal elastic pieces 11 can well catch the metal pin 9 to conduct the wire harness and the data line.

[0059] Please refer to Figure 3 As shown, a port positioning portion 37 is provided inside the gland assembly 26 to facilitate the positioning and installation of the connector. The signal input and output port 36, that is, the above-mentioned insertion hole, can be seen in the figure.

[0060] Therefore, in this application, the expansion force, temperature, and internal resistance of the core assembly 1 can be respectively collected by multiple sensors to evaluate the health state of the battery, so as to visually monitor the safety state of the core assembly 1 in real time and reduce the safety risk of the core assembly 1.

[0061] Please refer to Figure 5As shown, the terminal post sealing assembly further includes a terminal post 40. A sealing ring 14 is sleeved on the terminal post 40. Here, the sealing ring 14 sleeved on the terminal post 40 has the same function as the sealing ring 14 sleeved on the connector, which is to prevent leakage. The sealing ring 14 abuts between the limiting plate and the cover plate. A limiting plate is provided at the bottom of the terminal post. The limiting plate is integrally formed by extending outward from the bottom of the terminal post 40 to the peripheral side. The limiting plate abuts against the bracket 3 and is pressed against the bottom surface of the bracket 3. A first filling groove is annularly provided on the side wall of the terminal post, and a second filling groove is provided on the surface of the cover plate. The first filling groove and the second filling groove form a filling gap, and the filling gap is filled and cured with upper plastic 41 to realize the fixation of the terminal post 40 with the bracket 3 and the cover plate 2. The specific fixing process is to first pass the terminal post 40 through the bracket 3 and the cover plate 2, and after pressing the three together, then perform injection molding and curing to fix the positions of the three in this way, and upper plastic 41 is formed after curing.

[0062] The above-mentioned terminal post 40 includes a positive terminal post and a negative terminal post, and both the positive and negative terminal posts must be provided in the terminal post sealing assembly.

[0063] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope recorded in this specification. For those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A battery with a state transmission connector, comprising a pole sealing assembly, a winding core assembly, an expansion force sensor, a temperature sensor, an internal resistance sensor and an aluminum shell; the top of the winding core assembly is provided with a pole ear, and the pole sealing assembly is embedded and fixed with a pole; the expansion force sensor, the temperature sensor and the internal resistance sensor are all electrically connected to the winding core assembly; characterized in that: A connecting piece is welded and fixed on the top of the pole ear, and the connecting piece is welded to the pole; the pole sealing assembly includes a cover plate, a sealing ring and a bracket, and the cover plate and the bracket are respectively provided with corresponding downwardly recessed receiving grooves, the receiving groove of the cover plate is provided with a connector, and the bracket is fixedly arranged at the bottom of the cover plate, and the connector includes a plug hole, and a signal input wiring harness is fixedly plugged in the plug hole, and the signal input wiring harness is respectively connected to the expansion force sensor, the temperature sensor and the internal resistance sensor.

2. A battery with a status transmission connector as claimed in claim 1, characterized in that: The bracket is made of insulating plastic and is arranged between the cover plate and the core assembly to prevent conduction between the cover plate and the connecting piece; the bracket's receiving groove is recessed inward and extends a carrying frame, and the extended and formed part of the cover plate is placed in the carrying frame; the connector is provided with an annular flange extending toward the outer peripheral side, and the cover plate extends a limiting buckle to limit the position of the connector, and the extending limiting buckle forms a receiving groove of the cover plate.

3. A battery with a status transmission connector as claimed in claim 1, characterized in that: The connector is installed in the receiving groove of the cover plate, and an insulating ring is provided on the connector. A pressure plate is covered on the insulating ring, and the pressure plate covers the extending edge of the insulating ring and the connector. After the pressure plate presses and fixes the connector, the outer circumferential surface of the pressure plate is welded to the cover plate; the connector includes a terminal sleeve, an insulating plastic and a metal spring that can transmit signals; the terminal sleeve is covered and fixed with the insulating plastic, and the insulating plastic is provided with plug-in holes that are connected from top to bottom, and the lower outer side of the terminal sleeve is covered and fixed with a sealing ring, which is attached to the groove wall of the receiving groove, and a metal spring is fixed inside the terminal sleeve, and the insulating plastic is used to isolate the conduction between the terminal sleeve and the metal spring, and the internal port of the plug-in hole is plugged with a signal input harness, and the signal input harness is provided with a pin extending upward, and a sealant is provided at the tail end of the pin; the metal spring is provided inside the insulating plastic in the terminal sleeve, and the metal springs adjacent to each other form a snap end, and the snap end is located in the insulating plastic, and the snap end is used for plugging the pin.

4. A battery with a status transmission connector as claimed in claim 1, characterized in that: A first temperature collection terminal is provided at the ultrasonic welding point between the pole ear and the connecting piece of the core assembly, a second temperature collection terminal is provided at the laser welding point between the connecting piece and the lower end face of the pole of the pole sealing assembly, and a third temperature collection terminal is provided at the middle position of the side of the multi-core assembly. The signal input harness is electrically connected to the first temperature collection terminal, the second temperature collection terminal and the third temperature collection terminal, and the data signals collected by each temperature collection terminal are transmitted to the corresponding connector.

5. A battery with a status transmission connector as claimed in claim 1, characterized in that: A pole sealing assembly, a core assembly and a shell, wherein the core assembly is arranged in the shell; the expansion force sensor comprises a third transmission line, a fourth transmission line and a plurality of expansion force collecting ends; the third transmission line is connected to the plurality of expansion force collecting ends, and is used to obtain the expansion forces collected by the plurality of expansion force collecting ends; one end of the fourth transmission line is connected to the third transmission line, and the other end is connected to the signal input harness, and the signal input harness is connected to the transmission connector; the plurality of expansion force collecting ends are fixed around the middle end face of the core assembly side by adhesive stickers, so as to collect the expansion pressure of the battery cells at a plurality of positions during the charging and discharging process, and detect the expansion force condition of the battery module.

6. A battery with a status transmission connector as claimed in claim 1, characterized in that: The internal resistance sensor includes an internal resistance collecting end, a first transmission line and a second transmission line; the first internal resistance collecting end is provided at the ultrasonic welding position between the pole ear and the connecting piece of the winding core assembly, and the second internal resistance collecting end is provided at the laser welding position between the connecting piece and the lower end surface of the pole of the pole sealing assembly. The signal input harnesses are electrically connected to the first internal resistance collecting end and the second internal resistance collecting end respectively, so as to transmit the data signals collected by each internal resistance collecting end to the corresponding input port of the connector.

7. A battery with a status transmission connector as claimed in claim 1, characterized in that: The signal input harness includes multiple transmission lines, which are respectively connected to multiple expansion force collection terminals, temperature collection terminals and internal resistance collection terminals. The collection terminals are used to respectively obtain multiple expansion force, temperature and internal resistance data; the transmission lines are used to input multiple data collected by different collection terminals into the connector.

8. A battery with a status transmission connector as claimed in claim 1, characterized in that: It includes ultrasonic welding of the positive and negative pole ears of the winding core with the positive and negative pole connecting sheets, and then laser welding of the positive and negative pole connecting sheets with the lower end surfaces of the positive and negative poles of the pole sealing assembly; a first internal resistance collection terminal and a first temperature collection terminal are arranged at the welding point between the ear and the connecting sheet, and a second internal resistance collection terminal and a second temperature collection terminal are arranged at the welding point between the connecting sheet and the lower end surface of the pole, and the data signals collected by the internal resistance and temperature collection terminals are input into the corresponding positions of the connector by the transmission line.

9. A battery with a status transmission connector as claimed in claim 8, characterized in that: The pole ears include positive pole ears and negative pole ears, and the connecting plates include positive connecting plates and negative connecting plates; the positive pole ears and negative pole ears are ultrasonically welded to the positive connecting plates and negative connecting plates respectively, and the positive connecting plates and negative connecting plates are laser welded to the lower end faces of the positive pole column and the negative pole column provided with the pole sealing assembly respectively.

10. A battery with a status transmission connector as claimed in claim 1, characterized in that: The pole sealing assembly also includes a pole, a pole sleeve is provided with a sealing ring, a limit plate is provided at the bottom of the pole, the sealing ring abuts between the limit plate and the cover plate, the limit plate abuts against the bracket and is pressed against the bottom surface of the bracket, a first filling groove is provided on the side wall ring of the pole, a second filling groove is provided on the surface of the cover plate, the first filling groove and the second filling groove form a filling gap, and the filling gap is filled and cured with upper plastic to achieve the fixation of the pole, the bracket and the cover plate.

Images