Optical cable configuration method for collecting temperature of energy storage battery and energy storage battery

Abstract

The invention discloses an optical cable configuration method for collecting the temperature of an energy storage battery and the energy storage battery. The method comprises the following steps: setting the arrangement position and shape of an optical cable according to the heating space distribution characteristics of the energy storage battery; selecting an optical cable diameter and a coupling mode between the optical cable and the energy storage battery according to a layout environment and temperature measurement precision; and determining a wiring mode of the optical cable in combination with the arrangement position and shape of the optical cable, and arranging the optical cable on the surface of the energy storage battery based on a coupling mode between the optical cable and the energy storage battery. According to the invention, the distributed optical fiber temperature measurement can timely monitor the heating of the battery, and the temperature measurement precision and response speed are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage battery monitoring, and in particular to an optical cable configuration method for collecting the temperature of an energy storage battery and an energy storage battery. Background Art

[0002] As my country's demand for energy continues to increase, the demand for clean energy is also increasing. At present, the world's main new energy sources are hydrogen energy, wind energy, solar energy, and tidal energy. These new energy sources have obvious volatility and intermittency, which means that they need to be equipped with high-performance energy storage battery systems. However, there are currently few efficient energy storage battery sensor systems, and there are still some technical challenges in accurately predicting and controlling the battery operating status.

[0003] As an emerging battery temperature monitoring technology, distributed optical fiber temperature sensing technology has the advantages of high-density monitoring, accurate positioning, high temperature measurement accuracy and temperature resolution. The deployment of temperature-sensitive optical cables is an important core to realize distributed optical fiber temperature measurement batteries. At present, the deployment technology of temperature-sensitive optical cables is mainly used in medium and large buildings such as cable tunnels, oil and gas pipelines, bridges, shafts and warehouses. This type of technology is applied to the deployment of optical cables on the surface of energy storage batteries, and there are the following problems:

[0004] It is difficult to ensure timely monitoring of battery heating: the heating of the battery may be concentrated in a local location, and the current laying method makes it difficult for the optical cable to effectively monitor the heating of the battery.

[0005] Low temperature measurement accuracy and response speed: The working condition of the battery is closely related to the temperature, so the temperature measurement accuracy and response speed are required to be high. However, the temperature-sensing optical cables used in current technologies are mostly armored cables and other thick-diameter cables with poor thermal conductivity, low response speed, and the coupling method is difficult to effectively couple to the battery surface. Summary of the invention

[0006] The present invention provides an optical cable configuration method for collecting the temperature of an energy storage battery and an energy storage battery, so as to clarify how to determine the optical cable laying position and shape, determine the optical cable selection, the optical cable coupling method and the optical cable routing method, thereby improving the effectiveness of optical fiber monitoring and the efficiency of the design scheme, and expanding the application scenarios of optical fiber monitoring.

[0007] The present invention is achieved through the following technical solutions:

[0008] An optical cable configuration method for collecting temperature of an energy storage battery, comprising:

[0009] Set the location and shape of the optical cable according to the spatial distribution characteristics of the heat generation of the energy storage battery;

[0010] Select the diameter of the optical cable and the coupling method between the optical cable and the energy storage battery according to the installation environment and temperature measurement accuracy;

[0011] The routing mode of the optical cable is determined in combination with the position and shape of the optical cable, and the optical cable is arranged on the surface of the energy storage battery based on the coupling mode between the optical cable and the energy storage battery.

[0012] As an optimization, the specific process of setting the position and shape of the optical cable layout according to the spatial distribution characteristics of the heat generation of the energy storage battery is as follows:

[0013] The energy storage battery is connected to a DC electronic load meter to conduct a current experiment, and then the surface temperature of the energy storage battery is sampled to obtain the heat generation spatial distribution characteristics of the energy storage battery;

[0014] If the heat generation spatial distribution characteristic of the energy storage battery is that the battery surface generates heat in a planar manner, the optical cable is laid on the heating surface in a linear or looped manner;

[0015] If the heat generation spatial distribution characteristic of the energy storage battery is that the battery surface is locally heated in a point shape, the optical cable is laid in a loop shape on the heating point.

[0016] As an optimization, if the optical cable is laid in a loop on the heating surface, the minimum winding radius of the optical cable is smaller than the radius of the heating surface or heating point, and the minimum winding radius of the optical cable is larger than the minimum bending radius, and the winding length of the optical cable is larger than the spatial resolution S of the distributed temperature measurement, the number of windings C of the optical cable is n The specific expression is:

[0017] Wherein, R is the minimum coil radius of the optical cable, Indicates rounding up.

[0018] As an optimization, the laying path of the optical cable should not overlap with the heating bumps and recesses, as this may result in poor contact between the optical cable and the heating surface during laying.

[0019] As an optimization, the coupling method between the optical cable and the energy storage battery is a flame retardant tape bonding method.

[0020] As an optimization, a strengthening layer such as aramid can be added to the optical cable to meet the mechanical performance requirements of the optical cable, and the outer sheath layer of the optical cable is a flame retardant material such as LSZH and Teflon.

[0021] As an optimization, the routing mode of the optical cable is determined in combination with the position and shape of the optical cable, and the specific process of arranging the optical cable on the surface of the energy storage battery based on the coupling mode between the optical cable and the energy storage battery is as follows:

[0022] A1. Pull the head end of the optical cable out of the optical cable drum so that the optical cable is routed to the battery rack, wherein the optical cable is pulled from the head end to the tail end of the battery rack, and a set length of optical cable is left at the rightmost or leftmost end of each layer of the battery rack;

[0023] A2. Couple the optical cable in a determined shape to a position on the surface of the energy storage battery.

[0024] As an optimization, the specific calculation formula for the set length of the optical cable is:

[0025] L=1.1*l*n

[0026] Among them, l is the length of the optical cable required to be laid for a single energy storage battery, n is the number of energy storage batteries on each layer of the battery rack, and L is the set length.

[0027] As an optimization, between A1 also includes:

[0028] The optical cable pulled out from the optical cable drum is detachably fixed on the insulating plate in a determined shape to obtain a prefabricated structure in the shape of the optical cable layout, so as to realize rapid wiring.

[0029] The present invention also discloses an energy storage battery with a temperature-sensitive optical cable, comprising an energy storage battery, the surface of which is configured with an optical cable by the aforementioned optical cable configuration method for collecting the temperature of the energy storage battery.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] The present invention clarifies the design method for laying optical cables on energy storage batteries, effectively solving the problem that the current temperature-sensitive optical cable laying method is not suitable for laying optical cables for energy storage batteries, ensuring that distributed optical fiber temperature measurement can timely monitor battery heating, thereby improving temperature measurement accuracy and response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0033] Figure 1 A schematic diagram of arranging optical cables on the side of an energy storage battery using the method of the present invention;

[0034] Figure 2 A schematic diagram of arranging optical cables on the front side of an energy storage battery using the method of the present invention;

[0035] Figure 3 This is a schematic diagram of the optical cable routing;

[0036] Figure 4This is a schematic diagram of routing the optical cable after it is detachably fixed on the insulating plate. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0038] This embodiment 1 provides a method for configuring an optical cable for collecting the temperature of an energy storage battery. Figure 1-Figure 4 As shown, including:

[0039] S1. Set the location and shape of the optical cable according to the spatial distribution characteristics of the heat generation of the energy storage battery;

[0040] The specific process is:

[0041] S1.1. Use the same battery to conduct high current experiments to obtain the spatial distribution characteristics of battery heat generation.

[0042] The energy storage battery is connected to a DC electronic load meter to conduct a current experiment, and then the surface temperature of the energy storage battery is sampled to obtain the heat generation spatial distribution characteristics of the energy storage battery;

[0043] More specifically, a standard DC electronic load instrument can be used to connect the battery for current experiments, and an infrared imager or a spot temperature gun can be used for temperature sampling.

[0044] S1.2. Design the location and shape of the optical cable according to the spatial distribution and structural characteristics of battery heat generation.

[0045] If the heat generation spatial distribution characteristic of the energy storage battery is that the battery surface generates heat in a planar manner, the optical cable is laid on the heating surface in a linear or looped manner;

[0046] If the heat generation spatial distribution characteristic of the energy storage battery is that the battery surface is locally heated in a point shape, the optical cable is laid in a loop shape on the heating point.

[0047] In this embodiment, the surface refers to the maximum size (irregular shape) of the heating surface being much larger than the minimum curvature radius of the alternative optical cable, and the point being much smaller than. Here, much larger than and much smaller than can be set according to actual conditions.

[0048] The heat is point-like and is arranged in a circle shape because the temperature measurement of distributed optical cables has a certain spatial resolution. That is to say, for example, if the spatial resolution is 0.5m, it is necessary to arrange 0.5m optical cable at this hot spot, so the circle shape is the best high-density deployment solution.

[0049] If you encounter a strip or band-shaped heating surface, linear layout is the best; if it is a larger area or irregular shape, looping is more appropriate. If the optical cable is laid in a loop on the heating surface, the minimum loop radius of the optical cable is smaller than the radius of the heating surface or heating point, and the minimum loop radius of the optical cable is greater than the minimum bending radius, and the loop length of the optical cable is greater than the spatial resolution S of the distributed temperature measurement, and the number of loops of the optical cable C is n The specific expression is:

[0050] Wherein, R is the minimum coil radius of the optical cable, Indicates rounding up.

[0051] In some embodiments, the laying path of the optical cable should not overlap with the location of the heat-generating concave and convex parts, because this may result in poor contact between the optical cable and the heat-generating surface during laying.

[0052] Specifically, the optical cable should be laid to avoid protruding structures such as the reinforcing edges of the battery itself, and the optical cable should be laid flat on the battery surface as much as possible to increase the contact area between the optical cable and the battery surface.

[0053] S2. Select the diameter of the optical cable and the coupling method between the optical cable and the energy storage battery according to the installation environment and temperature measurement accuracy;

[0054] Specifically, all the alternative optical cables are placed in the same heat source at the same time to collect temperature data. The shorter the temperature rise time, the better the temperature response speed of the optical cable. The smaller the temperature error with the heat source after the temperature stabilizes, the higher the temperature measurement accuracy of the optical cable.

[0055] Specifically, the smaller the diameter of the optical cable, the better the temperature measurement accuracy and response speed performance, and the smaller the minimum bending radius.

[0056] Specifically, the outer sheath of the optical cable is made of flame-retardant and flexible materials to reduce the difficulty of routing the optical cable in the battery rack.

[0057] Furthermore, the compression and tensile strength of the optical cable should be considered, and optical cables with reinforcement layers should be selected.

[0058] The optical cable is provided with a reinforcement layer to meet the mechanical performance requirements of the optical cable, and the outer sheath layer of the optical cable is made of flame retardant material to meet the flame retardant requirements

[0059] Specifically, the coupling method should ensure that the optical cable is tightly attached to the battery surface, can be used for a long time, has little safety hazard, and is easy to operate, for example, by using flame-retardant tape.

[0060] S3. Determine the routing mode of the optical cable in combination with the position and shape of the optical cable, and arrange the optical cable on the surface of the energy storage battery based on the coupling mode between the optical cable and the energy storage battery.

[0061] In some embodiments, the specific process of determining the routing mode of the optical cable in combination with the position and shape of the optical cable, and arranging the optical cable on the surface of the energy storage battery based on the coupling mode between the optical cable and the energy storage battery is as follows:

[0062] A1. Pull the head end of the optical cable out of the optical cable drum so that the optical cable is routed to the battery rack, wherein the optical cable is pulled from the head end to the tail end of the battery rack, and a set length of optical cable is left at the rightmost or leftmost end of each layer of the battery rack;

[0063] Specifically, the specific calculation formula for the set length of the optical cable is:

[0064] L=1.1*l*n

[0065] Among them, l is the length of the optical cable required to be laid for a single energy storage battery, n is the number of energy storage batteries on each layer of the battery rack, and L is the set length.

[0066] A2. Couple the optical cable in a determined shape to a position on the surface of the energy storage battery.

[0067] That is to say, the optical cable is routed into the battery rack, the head end of the optical cable is pulled out from the cable drum, and it is towed from the head end of the rack to the tail end, while leaving enough optical cable at the rightmost or leftmost end of each layer.

[0068] The optical cable is coupled to the preset position on the battery surface in a determined shape. The optical cable is laid from the other side of each layer where there is enough optical cable left, and the optical cable is laid from the first battery on the other side of the reserved optical cable of each layer to the reserved optical cable side. The optical cable of each battery is extracted from the reserved optical cable of each layer.

[0069] Alternatively, the optical cable can be routed outside the battery rack, and the optical cable of each battery can be drawn from the cable tray, but this routing method will cause part of the optical cable to be exposed outside the rack. Therefore, the best routing method is to route the cable from the battery rack.

[0070] In some embodiments, the optical cable pulled out from the optical cable drum is detachably fixed on an insulating plate in a determined shape to obtain a prefabricated structure in the shape of the optical cable laying.

[0071] Next, the present invention will be described with reference to the accompanying drawings.

[0072] In this embodiment, the heat generated by the battery is concentrated on the side and front, so the optical cable is arranged in a loop on the side and front of the battery, see Figure 1 .

[0073] In this embodiment, the cable winding radius R=35 mm, which is smaller than the battery heating radius and larger than the minimum bending radius of the cable.

[0074] In this embodiment, the spatial resolution of distributed temperature measurement is S = 500 mm, and the number of turns of the optical cable is C. n =3.

[0075] In some embodiments, the optical cable is laid out in a linear manner on the heating surface, see Figure 2 .

[0076] In this embodiment, the battery room environment is relatively good, and the temperature measurement accuracy is given priority, and a tight-buffered optical cable with a wire diameter of 0.9 mm is selected.

[0077] In this embodiment, the outer sheath of the optical cable is made of low-smoke halogen-free material, which has a certain flexibility and is conducive to the routing of the optical cable in the battery rack.

[0078] In some embodiments, the compression and tensile strength of the optical cable need to be considered, and an optical cable with a reinforcement layer is selected.

[0079] In this embodiment, considering the problem of long-term coupling, Teflon tape is used to stick the optical cable.

[0080] In this embodiment, the optical cable is routed to the battery rack, the optical cable head end 23 is pulled out from the optical cable drum 21, and the cable is routed in the battery rack where the optical cable is to be laid. At the same time, a reserved optical cable 22 is left at the leftmost end of the battery rack 24, see Figure 3 .

[0081] In this embodiment, the length of the optical cable required for a single cell is 4.5 m, and the number of cells in a single layer is 6, so the reserved optical cable length L = 29.7 m.

[0082] Furthermore, the optical cable can be prefabricated in shape outside the site, and to prevent the optical cable from being tangled, the optical cable coil is fixed on the plastic plate 251 to obtain a prefabricated structure 25, and then the wiring is performed, such as Figure 4 shown.

[0083] In some embodiments, the optical cable does not need to be routed through the shelf, but can be routed outside the shelf, and the optical cable of each battery is extracted from the cable drum, but this routing method will cause part of the optical cable to be exposed outside the shelf.

[0084] In this embodiment, the optical cables are drawn from the optical cable drum 21 for laying the optical cables at the bottom layer.

[0085] In this embodiment, the optical cable is coupled to a preset position on the surface of the battery in a determined shape, and is laid out from the other side of each layer of reserved optical cables 22, and the optical cable of each battery is extracted from the reserved optical cables 22 of each layer.

[0086] Embodiment 2 further discloses an energy storage battery with a temperature-sensitive optical cable, comprising an energy storage battery, the surface of which is configured with an optical cable by the optical cable configuration method for collecting the temperature of an energy storage battery described in Embodiment 1.

[0087] Although this specification includes many specific implementation details, these should not be interpreted as limiting the scope of any invention or the scope of protection claimed, but are mainly used to describe the features of the specific embodiments of specific inventions. Certain features described in multiple embodiments in this specification may also be implemented in combination in a single embodiment. On the other hand, the various features described in a single embodiment may also be implemented separately in multiple embodiments or in any suitable sub-combination. In addition, although features may work in certain combinations as described above and even initially claim protection, one or more features from the claimed combination may be removed from the combination in some cases, and the claimed combination may point to a sub-combination or a variation of a sub-combination.

[0088] Thus, specific embodiments of the subject matter have been described. Other embodiments are within the scope of the appended claims. In some cases, the actions recited in the claims can be performed in a different order and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the particular order or sequential order shown to achieve the desired results. In some implementations, multitasking and parallel processing may be advantageous.

[0089] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0090] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for configuring an optical cable for collecting the temperature of an energy storage battery, characterized in that: include: Set the location and shape of the optical cable according to the spatial distribution characteristics of the heat generation of the energy storage battery; Select the diameter of the optical cable and the coupling method between the optical cable and the energy storage battery according to the installation environment and temperature measurement accuracy; The routing mode of the optical cable is determined in combination with the position and shape of the optical cable, and the optical cable is arranged on the surface of the energy storage battery based on the coupling mode between the optical cable and the energy storage battery.

2. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 1, characterized in that: The specific process of setting the position and shape of the optical cable layout according to the heat generation spatial distribution characteristics of the energy storage battery is as follows: The energy storage battery is connected to a DC electronic load meter to conduct a current experiment, and then the surface temperature of the energy storage battery is sampled to obtain the heat generation spatial distribution characteristics of the energy storage battery; If the heat generation spatial distribution characteristic of the energy storage battery is that the battery surface generates heat in a planar manner, the optical cable is laid on the heating surface in a linear or looped manner; If the heat generation spatial distribution characteristic of the energy storage battery is that the battery surface is locally heated in a point shape, the optical cable is laid in a loop shape on the heating point.

3. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 2, characterized in that: If the optical cable is arranged in a loop on the heating surface, the minimum winding radius of the optical cable is smaller than the radius of the heating surface or heating point, and the minimum winding radius of the optical cable is larger than the minimum bending radius, and the winding length of the optical cable is larger than the spatial resolution S of the distributed temperature measurement, the number of windings of the optical cable C is n The specific expression is: Wherein, R is the minimum coil radius of the optical cable, Indicates rounding up.

4. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 2, characterized in that: The laying path of the optical cable does not overlap with the heat-generating concave and convex positions.

5. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 1, characterized in that: The coupling method between the optical cable and the energy storage battery is a flame retardant tape bonding method.

6. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 1, characterized in that: A reinforcement layer is arranged in the optical cable, and the outer sheath layer of the optical cable is made of flame-retardant material.

7. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 2, characterized in that: The specific process of determining the routing mode of the optical cable in combination with the position and shape of the optical cable, and arranging the optical cable on the surface of the energy storage battery based on the coupling mode between the optical cable and the energy storage battery is as follows: A1. Pull the head end of the optical cable out of the optical cable drum so that the optical cable is routed to the battery rack, wherein the optical cable is pulled from the head end to the tail end of the battery rack, and a set length of optical cable is left at the rightmost or leftmost end of each layer of the battery rack; A2. Couple the optical cable in a determined shape to a position on the surface of the energy storage battery.

8. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 7, characterized in that: The specific calculation formula for the set length of the optical cable is: L=1.1*l*n Among them, l is the length of the optical cable required to be laid for a single energy storage battery, n is the number of energy storage batteries on each layer of the battery rack, and L is the set length.

9. The optical cable configuration method for collecting the temperature of an energy storage battery according to claim 7, characterized in that: Also included between A1: The optical cable pulled out from the optical cable drum is detachably fixed on the insulating plate in a determined shape to obtain a prefabricated structure in the shape of the optical cable layout, so as to realize rapid wiring.

10. An energy storage battery with a temperature-sensitive optical cable, characterized in that: It comprises an energy storage battery, and the surface of the energy storage battery is configured with an optical cable by the optical cable configuration method for collecting the temperature of the energy storage battery according to any one of claims 1 to 9.

Images