Battery device for measuring internal temperature of power battery
By installing a temperature sensor inside the power battery and sealing the lead wires with a sealant, the problems of short circuits and leakage caused by drilling holes in the casing are solved, enabling non-destructive internal temperature measurement and the establishment of real data.
Patent Information
- Application Number
- CN202423000548.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-05
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2034-12-05
AI Technical Summary
Existing technologies require drilling holes in the casing to implant sensors when measuring the internal temperature of power batteries, which poses risks of short circuits and leakage during charging and discharging, and makes it difficult to achieve mass production and sealing on cylindrical steel-cased batteries.
A temperature sensor is installed inside the battery casing, and a lead wire is led out from the casing opening and the cover. The casing is sealed with a sealing element to avoid drilling holes in the casing and to directly measure the internal temperature.
It enables internal temperature measurement without damaging the battery casing, avoiding the risks of short circuits and leakage. It can directly measure the internal temperature during charging and discharging, establish real temperature data, and reflect the correlation between battery life and temperature.
Smart Images
Figure CN223809144U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power battery field especially relates to a battery device for measuring power battery internal temperature. BACKGROUND
[0002] The basic method of measuring the heat generation of cylindrical lithium ion batteries has three categories, one is to arrange temperature sensors on the surface of the battery, and measure the surface temperature of the battery during charging and discharging through the temperature sensors; the second is to analyze the distribution of the surface temperature of the battery during charging and discharging through an infrared thermal imaging instrument, the above two methods cannot directly measure the heat generation of each component inside the battery; the third is to implant a sensor by digging a hole in the battery shell, but it will increase the risk of short circuit, liquid leakage and other safety risks during the charging and discharging process of the battery, and it is difficult to dig a hole and seal on the cylindrical steel shell battery, and the sensor cannot be implanted in the production process to monitor the internal temperature. SUMMARY
[0003] The utility model discloses a kind of battery devices for measuring power battery internal temperature, to solve the problem of short circuit, liquid leakage and other problems caused by the need to punch the shell and implant temperature sensor in prior art during the charging and discharging process of battery.
[0004] In order to achieve the above purpose, the utility model provides a kind of battery device for measuring power battery internal temperature, including power battery, the power battery includes shell, cover and the roll core arranged in the shell, one end of the shell has shell mouth part, the shell mouth part is equipped with rolling groove structure and flanging portion, the rolling groove structure is recessed to the inside of the shell, the edge of the cover is clamped between the rolling groove structure and the flanging portion;The battery device further includes at least one temperature sensor, the temperature sensor includes inductive part and the lead-out wire connected with the inductive part, the inductive part is arranged in the inside of the shell, the lead-out wire is led out between the cover and the shell mouth part, the cover and the shell mouth part are also equipped with sealing element for sealing the shell mouth part and the cover, and the sealing element seals the lead-out wire between the shell mouth part and the cover.
[0005] Preferably, the lead-out wire is threaded out between the cover and the sealing element.
[0006] Preferably, the lead-out wire is threaded out between the sealing element and the shell mouth part.
[0007] Preferably, the lead-out wire is threaded out from the inside of the sealing element.
[0008] Preferably, one end of the roll core close to the shell mouth part is provided with a positive full tab, the positive full tab is connected with a positive current collector, and the inductive part is arranged on the positive current collector.
[0009] Preferably, the middle part of the winding core has a central hole, and the sensing part is arranged in the middle part in the axial direction of the central hole.
[0010] Preferably, the winding core is provided with a negative full tab at one end away from the shell opening part, the negative full tab is welded to the negative current collector, the middle part of the negative current collector is further welded to the bottom of the shell and forms a welding site, and the welding site is provided with the sensing part.
[0011] Preferably, one end of the lead wire is connected to the sensing part, and the other end of the lead wire is connected to a measurement display instrument to display the temperature of the sensing part.
[0012] Preferably, the sealing member is a sealing ring made of rubber, and the lower part of the sealing member extends to the groove structure.
[0013] Preferably, the power battery is a cylindrical power battery, and the shell of the power battery is a steel shell.
[0014] Compared with the prior art, the utility model discloses a temperature sensor is arranged in the inside of the power battery shell, and the lead wire is led out between the shell opening part and the cover and is sealed through the sealing member, so that the power battery shell does not need to be punched to damage the battery shell, and there is no problem of affecting the performance of the battery caused by liquid leakage of the eyelet, the temperature of each part in the battery during the charging and discharging cycle can be directly measured through the temperature sensor, the real temperature data during the cycle of the battery are established, and the correlation between the real life and temperature is reflected. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a structural schematic view of the battery device of the utility model embodiment.
[0016] Figure 2 It is a sectional structure schematic view of the battery device of the utility model embodiment, wherein the sensing part of the temperature sensor is arranged on the positive current collector.
[0017] Figure 3 It is a sectional structure schematic view of the battery device of the utility model embodiment, wherein the sensing part of the temperature sensor is arranged in the middle part of the central hole of the winding core.
[0018] Figure 4 It is a sectional structure schematic view of the battery device of the utility model embodiment, wherein the sensing part of the temperature sensor is arranged on the welding site. DETAILED DESCRIPTION
[0019] In order to make the technical content, structural features and effects of the utility model clear, the following will be described in detail in combination with the embodiment and the drawings.
[0020] AsFigures 1 to 4 The utility model provides a kind of battery device 100 for measuring the temperature inside power battery 10, including power battery 10, power battery 10 includes shell 1, cover 2 and the roll core 3 being arranged in shell 1, one end of shell 1 has shell mouth part 11, shell mouth part 11 is equipped with rolling groove structure 111 and flanging portion 112, rolling groove structure 111 is recessed to the inside of shell 1, the edge of cover 2 is clamped between rolling groove structure 111 and flanging portion 112;Battery device 100 further includes at least one temperature sensor 4, temperature sensor 4 includes inductive part 42 and the lead-out wire 41 connected with inductive part 42, inductive part 42 is arranged in the inside of shell 1, lead-out wire 41 is led out from between cover 2 and shell mouth part 11, cover 2 and shell mouth part 11 between also be equipped with sealing element 5 for sealing shell mouth part 11 and cover 2 and sealing element 5 makes lead-out wire 41 and shell mouth part 11 and cover 2 between sealing.Specifically, power battery 10 can be cylindrical power battery, the shell 1 of power battery 10 can be steel shell, temperature sensor 4 can be multiple, temperature sensor 4 can be thermistor or thermocouple etc., one end of lead-out wire 41 of temperature sensor 4 is connected inductive part 42, the other end of lead-out wire 41 is connected with measurement display instrument to show the temperature of inductive part 42.Power battery 10 in the process of making, shell mouth part 11 is integrally sealed by rolling groove process cover 2, sealing element 5 and lead-out wire 41, need not additional increase punching, hole sealing process, process is simple, realizes convenient, by setting temperature sensor 4 in the inside of power battery 10, can directly measure the temperature of each part in the inside of power battery 10 in the process of charge-discharge cycle, establishes the real temperature data of power battery 10 in the process of cycle, reflects the correlation of real life and temperature, and, since it is difficult to dig hole and seal on the steel shell of cylindrical structure, the utility model embodiment need not punch power battery 10 and damage the shell 1 of power battery 10, realizes the in-situ measurement of power battery 10, design is very ingenious.
[0021] The utility model embodiment sets temperature sensor 4 in the inside of power battery 10 shell 1 and leads out lead-out wire 41 between shell mouth part 11 and cover 2 and seals by sealing element 5, need not punch power battery 10 shell 1 and damage battery shell 1, also do not exist the problem of hole leakage etc.
[0022] In the utility model embodiment, lead-out wire 41 is threaded from between cover 2 and sealing element 5. Figures 2 to 4As shown in the drawings, the lead-out wire 41 is arranged between the cover 2 and the sealing member 5, so that the lead-out wire 41 is prevented from being damaged by being extruded by the mold during the rolling groove process, of course, in some other specific embodiments of the utility model, the lead-out wire 41 can also be led out from between the sealing member 5 and the shell mouth part 11.
[0023] In some other specific embodiments of the utility model, the lead-out wire 41 is led out from the inside of the sealing member 5, specifically, a lead-through channel of the lead-out wire 41 is arranged in the inside of the sealing member 5, the lead-out wire 41 is led through the channel and is sealed by the inner wall of the channel, and the shell 1 also does not need to be punched.
[0024] In the embodiment of the utility model, one end of the winding core 3 close to the shell mouth part 11 is provided with a positive full tab, the positive full tab is connected with the positive current collector plate 6, and the sensing part 42 is arranged on the positive current collector plate 6. Figure 2 As shown in the drawings, the temperature sensor 4 can be multiple, wherein the sensing part 42 of one of the temperature sensors 4 is arranged on the positive current collector plate 6, the temperature of the positive full tab during charging and discharging is measured, and the overcurrent temperature rise of the positive full tab is judged.
[0025] In the embodiment of the utility model, the winding core 3 has a center hole 31 in the middle part, and the sensing part 42 is arranged in the middle part in the axial direction of the center hole 31. Figure 3 As shown in the drawings, the temperature sensor 4 can be multiple, wherein the sensing part 42 of one of the temperature sensors 4 is arranged in the middle part in the axial direction of the center hole 31 of the winding core 3, that is, the sensing part 42 is arranged at the geometric center position of the power battery 10, so that the actual temperature rise at the geometric center position of the power battery 10 is obtained.
[0026] In the embodiment of the utility model, as shown in the drawings, Figure 4 As shown in the drawings, one end of the winding core 3 away from the shell mouth part 11 is provided with a negative full tab, the negative full tab is welded and connected with the negative current collector plate 7, the middle part of the negative current collector plate 7 is also welded and connected with the bottom of the shell 1 and forms a welding position, and the sensing part 42 is arranged at the welding position. Specifically, the bottom of the shell 1 is a bottom shell 12, the real-time temperature rise at the welding position is measured, and the influence of temperature on the reliability of the welding position is monitored.
[0027] In the embodiment of the utility model, the temperature sensor 4 can be multiple, and the multiple temperature sensors 4 can be arranged at various positions in the power battery 10 according to actual needs, and the actual needs are subject to the actual needs and are not limited herein.
[0028] In the embodiment of the utility model, as shown in the drawings, Figures 1 to 4 As shown in the drawings, the sealing member 5 is a sealing ring made of rubber material, and the lower part of the sealing member 5 extends to the rolling groove structure 111, so that the shell mouth part 11 is better sealed.
[0029] The above disclosed is only a preferred embodiment of the present application, and of course cannot limit the scope of the present application, therefore equivalent changes made according to the patent application scope of the present application still belong to the scope covered by the present application.
Claims
1. A battery device for measuring an internal temperature of a power battery, comprising a power battery, the power battery comprising a shell, a cover, and a winding core arranged in the shell, characterized in that, One end of the shell has a shell opening part, the shell opening part is provided with a rolling groove structure and a flanging part, the rolling groove structure is recessed to the inside of the shell, and the edge of the cover body is clamped between the rolling groove structure and the flanging part; The battery device further comprises at least one temperature sensor, the temperature sensor comprises a sensing part and a lead wire connected with the sensing part, the sensing part is arranged inside the shell, the lead wire is led out from between the cover body and the shell opening part, and a sealing element for sealing the shell opening part and the cover body is further arranged between the cover body and the shell opening part, and the sealing element seals the lead wire from the shell opening part and the cover body.
2. The battery device for measuring the internal temperature of a power battery according to claim 1, characterized in that, The lead wire is led out from between the cover body and the sealing element.
3. The battery apparatus for measuring the internal temperature of a power battery according to claim 1, wherein, The lead wire is led out from between the sealing element and the shell opening part.
4. The battery apparatus for measuring the internal temperature of a power battery according to claim 1, wherein, The lead wire is led out from inside the sealing element.
5. The battery apparatus for measuring the internal temperature of a power battery according to claim 1, wherein, One end of the winding core close to the shell opening part is provided with a positive full tab, the positive full tab is connected with a positive current collector disc, and the sensing part is arranged on the positive current collector disc.
6. The battery apparatus for measuring an internal temperature of a power battery according to claim 1, wherein, The middle part of the winding core has a center hole, and the sensing part is arranged in the middle part in the axial direction of the center hole.
7. The battery apparatus for measuring the internal temperature of a power battery according to claim 1, wherein, One end of the winding core away from the shell opening part is provided with a negative full tab, the negative full tab is welded with a negative current collector disc, the middle part of the negative current collector disc is further welded with the bottom of the shell and forms a welding site, and the welding site is provided with the sensing part.
8. The battery apparatus for measuring the internal temperature of a power battery according to claim 1, wherein, One end of the lead wire is connected with the sensing part, and the other end of the lead wire is connected with a measurement display instrument to display the temperature of the sensing part.
9. The battery apparatus for measuring the internal temperature of a power battery according to claim 1, wherein, The sealing element is a rubber sealing ring, and the lower part of the sealing element extends to the rolling groove structure.
10. The battery apparatus for measuring an internal temperature of a power battery according to claim 1, wherein, The power battery is a cylindrical power battery, and the shell of the power battery is a steel shell.