Battery temperature control ring, battery axial temperature control device and battery structure

Abstract

The present invention discloses a battery temperature control ring, a battery axial temperature uniformity control device and a battery structure, wherein the battery temperature control ring comprises an inner ring and an outer ring with insulation and heat conduction functions, the inner ring is used to be sleeved at a certain position on the outer peripheral surface of the battery, and an annular accommodating space is formed between the inner ring and the outer ring, and a plurality of P-type semiconductor components and N-type semiconductor components that can be used as semiconductor refrigeration materials are arranged side by side in the accommodating space; a current path is formed between the P-type semiconductor components and the N-type semiconductor components to transfer heat between the inner ring and the outer ring; a temperature control sleeve assembly composed of a plurality of battery temperature control rings is sleeved on the outer peripheral surface of the battery, and the heat dissipation power of the battery control ring at each position can be adjusted according to the difference in heat generation power of the battery from the middle to the two ends, so that the temperature of each position of the outer peripheral surface of the battery along the axial direction is the same, thereby improving the uniformity of the battery working environment and increasing the service life.

Description

Technical Field

[0001] The present invention relates to the technical field of battery heat dissipation, and in particular to a battery temperature control ring capable of controlling uniform axial heat dissipation of a battery, a battery axial temperature uniformity control device, and a battery structure with axial uniform heat dissipation function. Background Art

[0002] Battery operation is essentially an electrochemical reaction, which results in changes in heat, either absorbing or releasing heat. However, batteries are not uniform along the axial direction, so the heat changes at each location along the axial direction vary. For example, when a cylindrical battery is discharged, the temperature in the middle is higher and the temperature at the ends is lower. This means that the battery itself experiences a temperature difference, and as the discharge current increases, the temperature difference caused by this difference in heat generation power increases. This temperature difference generated by battery operation is detrimental to the uniformity of the battery, affecting its performance, service life, and safety. This is specifically manifested in inconsistent absolute values of material expansion and inconsistent degrees of deterioration caused by axial temperature differences. Current methods for addressing battery heating include placing the battery in a constant temperature controlled environment or attaching thermally conductive materials to the battery surface. However, neither of these methods can address the axial temperature difference caused by differences in the battery's own heat generation power. Summary of the Invention

[0003] One of the objectives of the present invention is to provide a battery temperature control ring for fixed-point control of the axial temperature of the battery's outer peripheral surface, so that the overall temperature of the battery is consistent.

[0004] Another object of the present invention is to provide a battery axial temperature uniformity control device for fixed-point control of the axial temperature of the battery outer peripheral surface so that the overall temperature of the battery is consistent.

[0005] Another object of the present invention is to provide a battery structure with uniform axial temperature during operation.

[0006] To achieve the above-mentioned objectives, the present invention discloses a battery temperature control ring, characterized in that it includes an inner ring and an outer ring with insulating and heat-conducting functions, the inner ring is used to be sleeved at a certain position on the outer circumference of the battery, and the inner ring can directly contact the outer circumference of the battery adapted thereto, an annular accommodating space is formed between the inner ring and the outer ring, and a plurality of P-type semiconductor components and N-type semiconductor components that can be used as semiconductor refrigeration materials are arranged side by side in the accommodating space, one end of each of the P-type semiconductor component and the N-type semiconductor component abuts the outer ring, and the other end of each of the P-type semiconductor component and the N-type semiconductor component abuts the inner ring; a current path is formed between the P-type semiconductor component and the N-type semiconductor component to transfer heat between the inner ring and the outer ring.

[0007] Preferably, the P-type semiconductor components and the N-type semiconductor components are arranged alternately, and a series current path is formed between a plurality of the P-type semiconductor components and the N-type semiconductor components.

[0008] Preferably, the gaps between the P-type semiconductor components and the N-type semiconductor components are filled.

[0009] Preferably, the filler is resin.

[0010] The present invention also discloses a battery axial temperature control device, which includes a temperature control sleeve assembly that can be sleeved on the outer peripheral surface of the battery. The temperature control sleeve assembly includes several layers of battery temperature control rings as described above stacked up and down along the axial direction of the battery.

[0011] Preferably, the temperature control sleeve assembly further includes a current controller, which is electrically connected to the current paths on the plurality of battery temperature control rings to control the magnitude and direction of the current in the current path on each of the battery temperature control rings.

[0012] Preferably, the temperature control sleeve assembly also includes a temperature sensor arranged on each of the battery temperature control rings and electrically connected to the current controller, wherein the temperature sensor is used to detect the temperature of the outer peripheral surface of the battery at its location, and the current controller can control the current size and direction in the current path on the battery temperature control ring to which it belongs according to the detection value of the temperature sensor.

[0013] The present invention further discloses a battery structure, which includes a battery and the battery axial temperature uniformity control device as described above, which is sleeved on the outer peripheral surface of the battery.

[0014] Preferably, the temperature control sleeve assembly further includes a current controller, which is electrically connected to the current paths on the plurality of battery temperature control rings to control the magnitude and direction of the current in the current path on each of the battery temperature control rings.

[0015] Preferably, the temperature control sleeve assembly further comprises a temperature sensor provided on each of the battery temperature control rings and electrically connected to the current controller, wherein the temperature sensor is used to detect the temperature of the outer peripheral surface of the battery at the location, and the current controller can control the magnitude and direction of the current in the current path on the battery temperature control ring to which it belongs according to the detection value of the temperature sensor.

[0016] Compared with the prior art, the present invention adopts a temperature control sleeve assembly consisting of several battery temperature control rings, which is sleeved on the outer peripheral surface of the battery. The battery control rings are distributed axially on the outer peripheral surface of the battery. Each battery temperature control ring is a semiconductor refrigerator. When the battery is working, the heat dissipation power (or heating power) of each battery control ring on the outer peripheral surface of the battery can be controlled by controlling the current in the current path within each battery control ring. Therefore, the heat dissipation power of the battery control ring at each position can be adjusted according to the difference in the heating power of the battery from the middle to the two ends, so that the temperature of each point on the outer peripheral surface of the battery along the axial direction is the same, thereby improving the uniformity of the battery working environment and increasing the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the battery structure of an embodiment of the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the decomposition.

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the temperature control sleeve assembly in an embodiment of the present invention.

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the battery temperature control ring in an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the planar structure of the battery temperature control ring in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0023] like Figures 1 to 3As shown, this embodiment discloses a battery structure 1 comprising a battery 10 and a battery axial temperature control device mounted on the outer circumference of the battery 10. In this embodiment, the battery 10 is cylindrical, but this is not limiting. The battery axial temperature control device is used to maintain a uniform temperature at all locations along the battery 10's axial direction during operation, specifically maintaining a uniform temperature from the center toward the ends, thereby improving the uniformity of the operating temperature environment of the battery 10. Because the heat output of the battery 10 gradually decreases from the center toward the ends during operation, the battery 10's temperature varies along the axial direction. To eliminate this variation, the battery axial temperature control device in this embodiment includes a temperature control sleeve assembly 11 that can be mounted on the outer circumference of the battery 10. The temperature control sleeve assembly 11 includes several layers of battery temperature control rings 12 stacked one above the other along the axial direction of the battery 10. Each battery temperature control ring 12 controls the temperature of the battery 10's outer circumference at its location. By differentially adjusting the heat dissipation output of each battery temperature control ring 12, the axial temperature unevenness of the battery 10 caused by uneven heat output along the axial direction is eliminated.

[0024] like Figure 4 and Figure 5 As shown, the battery temperature control ring 12 is designed based on the principle of a semiconductor cooler and includes an inner ring 120 and an outer ring 121 with insulating and heat-conducting functions. The inner ring 120 is used to be mounted at a certain position on the outer circumference of the battery 10 and can directly contact the outer circumference of the battery 10 to facilitate heat exchange with the outer circumference of the battery 10. An annular accommodation space is formed between the inner ring 120 and the outer ring 121. A plurality of P-type semiconductor components 122 and N-type semiconductor components 123, which can be used as semiconductor cooling materials, are arranged side by side in the accommodation space. One end of each P-type semiconductor component 122 and N-type semiconductor component 123 abuts the outer ring 121, and the other end of each P-type semiconductor component 122 and N-type semiconductor component 123 abuts the inner ring 120. In other words, the inner ring 120 and the outer ring 121 are connected by the plurality of P-type semiconductor components 122 and N-type semiconductor components 123. A current path is formed between the P-type semiconductor element 122 and the N-type semiconductor element 123 to transfer heat between the inner ring 120 and the outer ring 121 .

[0025] The working principle of the battery temperature control ring 12 with the above structure is:

[0026] Heat dissipation process: A suitable current direction and intensity are provided to form a current path between the P-type semiconductor component 122 and the N-type semiconductor component 123. The P-type semiconductor component 122 and the N-type semiconductor component 123 absorb heat from the inner ring 120 at the end close to the inner ring 120, thereby cooling the outer peripheral surface of the battery 10. The P-type semiconductor component 122 and the N-type semiconductor component 123 release heat at the end close to the outer ring 121 and dissipate the heat through the outer ring 121.

[0027] Heating process: Provide a suitable current direction and intensity to form a current path between the P-type semiconductor component 122 and the N-type semiconductor component 123. The current direction is opposite to the current direction during the heat dissipation process. The P-type semiconductor component 122 and the N-type semiconductor component 123 absorb heat at the end close to the outer ring 121, and release heat at the end close to the inner ring 120, thereby transferring the heat to the outer peripheral surface of the battery 10.

[0028] Taking the heat dissipation process of the battery temperature control ring 12 as an example, by providing different battery temperature control rings 12 in the temperature control sleeve assembly 11 with currents of different intensities, different battery temperature control rings 12 have different heat dissipation powers. Specifically, corresponding to the law that the heat generation power decreases from the middle to the two ends during the operation of the battery 10, a stronger current is provided to the battery temperature control ring 12 located in the middle part of the battery 10, so that the battery temperature control ring 12 located at this position has a stronger heat dissipation power, and the current intensity in the current path of the battery temperature control ring 12 from the middle to the two ends of the axial direction of the battery 10 gradually decreases, so that the heat dissipation power of the battery temperature control ring 12 from the middle to the two ends of the axial direction of the battery 10 gradually decreases, thereby eliminating the temperature difference caused to the battery 10 itself by the uneven axial heat generation power during the operation of the battery 10, effectively improving the uniformity of the working temperature environment of the battery 10, and increasing the service life of the battery 10.

[0029] like Figure 5 As shown, P-type semiconductor devices 122 and N-type semiconductor devices 123 are arranged alternately, and a series current path is formed between several of the P-type semiconductor devices 122 and N-type semiconductor devices 123. In this embodiment, adjacent P-type semiconductor devices 122 and N-type semiconductor devices 123 in the current path of the battery temperature control ring 12 are connected by an elongated conductive metal sheet 124, which is attached to the outer wall of the inner ring 120 and the inner wall of the outer ring 121. In addition, the P-type semiconductor devices 122 and N-type semiconductor devices 123 at the two input ends of the current path are respectively abutted against the outer wall of the inner ring 120 by a short conductive metal sheet 125. The two short conductive metal sheets 125 are electrically connected to the positive and negative terminals of the input voltage.

[0030] Please refer again Figure 5 To effectively ensure the structural strength of each battery temperature control ring 12, a filler 126 is provided in the gaps between the P-type semiconductor components 122 and the N-type semiconductor components 123, thereby connecting the P-type semiconductor components 122, the N-type semiconductor components 123, the inner ring 120, and the outer ring 121 into a single unit. Specifically, the filler 126 is a resin.

[0031] Further, please refer to Figure 3 and Figure 4 The temperature control sleeve assembly 11 also includes a current controller 13, which is electrically connected to the current paths of the battery temperature control rings 12 to control the magnitude and direction of the current in the current path of each battery temperature control ring 12. Specifically, a temperature sensor 14 is provided on the inner ring 120 of each battery temperature control ring 12. The temperature sensor 14 is used to detect the temperature of the outer peripheral surface of the battery 10 at its location. In this embodiment, the temperature sensor 14 is embedded in the inner wall of the inner ring 120 facing the outer peripheral surface of the battery 10. The current controller 13 controls the magnitude and direction of the current in the current path of the battery temperature control ring 12 to which it belongs based on the detection value of the temperature sensor 14.

[0032] During the operation (charging or discharging) of the battery 10, the temperature sensor 14 on the battery temperature control ring 12 located at each axial position of the battery 10 detects the temperature of the outer peripheral surface of the battery 10 at that position in real time. When the detected temperature is greater than the set temperature, the current path on the battery temperature control ring 12 is activated, and then the temperature difference ΔT before and after a period of time t is continuously recorded. If ΔT is positive, it means that the surface temperature of the battery 10 is still rising, and then the current intensity in the current path on the battery temperature control ring 12 is increased. If ΔT is negative, the surface temperature of the battery 10 decreases. ΔT / t is the rate of decrease. If the rate of decrease exceeds the set value, the current intensity in the current path on the battery temperature control ring 12 is reduced. If the rate of decrease is less than the set value, the current intensity in the current path on the battery temperature control ring 12 is increased. If the rate of decrease reaches the set value, the current intensity in the current path on the battery temperature control ring 12 is maintained. When the temperature sensor 14 detects that the surface temperature of the battery 10 is less than or equal to the set temperature, it stops supplying power to the battery temperature control ring 12 until the next time it detects that the surface temperature of the battery 10 is greater than the set temperature. The current controller 13 controls the battery temperature control ring 12 to repeat the above-mentioned mode to perform axial differentiated cooling on the outer peripheral surface of the battery 10.

[0033] Similarly, when the temperature of the outer surface of the battery 10 is lower than the extreme temperature, the battery 10 may also be set to be uniformly heated. The heating process is similar to the above-mentioned heat dissipation process and will not be described in detail here.

[0034] In summary, if Figures 1 to 5 The above embodiment discloses a battery structure 1 having a temperature control sleeve assembly 11 sleeved on the outer peripheral surface. The multiple battery temperature control rings 12 constituting the temperature control sleeve assembly 11 are arranged along the axial direction of the battery 10. In view of the difference in heat generation power in different axial regions of the battery 10, differentiated heat dissipation power is provided to the outer peripheral surface of the battery 10 according to the Peltier effect (semiconductor refrigeration), so that the temperature of the outer peripheral surface of the battery 10 along the axial direction is roughly the same, thereby providing a uniform temperature environment for the battery 10 to operate, thereby improving the working efficiency and service life of the battery 10.

[0035] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope of the present invention.

Claims

1. A battery axial temperature control device, characterized in that: The invention comprises a temperature control sleeve assembly sleeved on the outer peripheral surface of the battery, the temperature control sleeve assembly comprising a plurality of battery temperature control rings stacked up and down along the axial direction of the battery, the battery temperature control ring comprising an inner ring and an outer ring with insulation and heat conduction functions, the inner ring being sleeved at a certain position on the outer peripheral surface of the battery, and the inner ring being in direct contact with the outer peripheral surface of the battery adapted thereto, an annular accommodation space being formed between the inner ring and the outer ring, a plurality of P-type semiconductor components and N-type semiconductor components serving as semiconductor refrigeration materials being arranged side by side in the accommodation space, one end of each of the P-type semiconductor component and the N-type semiconductor component being in contact with the outer ring, and the other end of each of the P-type semiconductor component and the N-type semiconductor component being in contact with the inner ring; A current path is formed between the P-type semiconductor component and the N-type semiconductor component to transfer heat between the inner ring and the outer ring; By providing different currents of different strengths to different battery temperature control rings in the temperature control sleeve assembly, the different battery temperature control rings have different heat dissipation powers, thereby controlling the battery temperature from the middle position to both ends to be the same; The P-type semiconductor components and the N-type semiconductor components are arranged alternately, and a series current path is formed between the P-type semiconductor components and the N-type semiconductor components; and fillers are provided in the gaps between the P-type semiconductor components and the N-type semiconductor components.

2. The battery axial temperature control device according to claim 1, characterized in that: The filler is resin.

3. The battery axial temperature control device according to claim 1, characterized in that: The temperature control sleeve assembly further includes a current controller, which is electrically connected to the current paths on the battery temperature control rings to control the magnitude and direction of the current in the current path on each battery temperature control ring.

4. The battery axial temperature control device according to claim 3, characterized in that: The temperature control sleeve assembly also includes a temperature sensor provided on each of the battery temperature control rings and electrically connected to the current controller. The temperature sensor is used to detect the temperature of the outer peripheral surface of the battery at its location. The current controller controls the magnitude and direction of the current in the current path on the battery temperature control ring to which it belongs according to the detection value of the temperature sensor.

5. A battery structure, characterized in that: The invention comprises a battery and a battery axial temperature uniformity control device according to any one of claims 1 to 4, which is sleeved on the outer peripheral surface of the battery.

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