New energy vehicle battery monitoring circuit having wire containing multiple bends

Abstract

A new energy vehicle battery monitoring circuit having a wire containing multiple bends, the circuit comprising a temperature sensor (20) and a folded wire containing multiple bends (10). The temperature sensor (20) is arranged on a monitored battery (40) and is electrically connected to a signal transmission bus (30) by means of the folded wire containing multiple bends (10). The folded wire containing multiple bends (10) comprises a plurality of bent serpentine segments and straight-line segments. The bent serpentine segments and the straight-line segments are alternately arranged on the folded wire containing multiple bends (10). The plurality of straight-line segments are parallel to each other, and insulating outer cladding layers of adjacent straight-line segments are bonded to each other. The bonding force between adjacent straight-line segments is directly proportional to the distance from the corresponding bonding position to the temperature sensor (20), and the bonding force is smaller than a preset structural force bearing threshold. The plurality of bent serpentine segments do not overlap in the arrangement direction of the straight-line segments. According to the battery monitoring circuit, the operational stability of the circuit is improved, the safety of the signal transmission bus is guaranteed, and maintenance costs are reduced.

Description

New energy vehicle battery detection circuit with multi-bent wire TECHNICAL FIELD

[0001] The utility model relates to the field of circuit manufacturing, in particular to a new energy vehicle battery detection circuit with multi-bent wire. BACKGROUND

[0002] With the development and application of new energy technology, more and more devices use power battery pack as the core energy component to provide power for the whole device, and its safety has been focused on in the industry. In order to ensure the safe operation of the battery in the power battery pack, it is necessary to monitor and record the state of the battery (such as temperature state) in real time. In related technology, a signal transmission bus is usually installed on the surface of the battery, and state detection elements are arranged on both sides of the signal transmission bus. These state detection elements transmit signals with the signal transmission bus through an electrical connection structure, and the above-mentioned state detection elements and the electrical connection structure constitute the state detection circuit of the battery.

[0003] However, when the battery is rapidly charged, the high-power charging will cause a strong heating effect, the overall temperature will rise, and the battery will also expand and contract greatly, causing the distance between the signal transmission bus fixed on the surface of the battery and the state detection element to change greatly. In related technology, the electrical connection structure connecting the state detection element and the signal transmission bus is usually a straight wire or an S-shaped copper sheet, which is rigid and has poor flexibility. After experiencing multiple thermal expansion and contraction, it is easy to break or disconnect, and even the signal transmission bus may be damaged by pulling.

[0004] Therefore, how to provide an electrical connection structure with excellent flexibility to improve the working stability and service life of the new energy vehicle battery detection circuit with multi-bent wire is a problem that needs to be solved by those skilled in the art. INVENTION CONTENTS

[0005] The utility model aims at providing a new energy vehicle battery detection circuit with multi-bent wire to solve the problem of poor flexibility of the electrical connection structure of the new energy vehicle battery detection circuit with multi-bent wire in the prior art, which leads to poor working stability and short service life of the new energy vehicle battery detection circuit with multi-bent wire.

[0006] To solve the above technical problems, the utility model provides a new energy vehicle battery detection circuit with multi-bent wire, which comprises a temperature sensor and a multi-bent folded wire.

[0007] The temperature sensor is arranged on the monitored battery and is electrically connected with the signal transmission bus through the multi-bent folded wire.

[0008] The multi-bent folded wire comprises a plurality of bent and winding segments and straight segments.

[0009] The bending and winding sections and the straight sections are arranged alternately on the multi-bending folded conductor wire.

[0010] The plurality of straight sections are parallel to each other, and the insulating outer cladding layers of adjacent straight sections are bonded to each other.

[0011] The bonding force between adjacent straight sections is proportional to the distance between the corresponding bonding position and the temperature sensor, and the bonding force is less than a preset structural bearing threshold.

[0012] The plurality of bending and winding sections do not overlap in the arrangement direction of the plurality of straight sections.

[0013] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, the bending and winding section is a circular arc section.

[0014] The ratio of the radius of curvature of the circular arc section to the outer diameter of the multi-bending folded conductor wire is not less than a preset arc stability threshold.

[0015] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, the bonding force ranges from 5N to 25N, inclusive.

[0016] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, the insulating outer cladding layer of the multi-bending folded conductor wire includes at least one of a cross-linked polyethylene layer, a polypropylene layer, and a polyvinyl chloride layer.

[0017] And / or

[0018] The conductive core of the multi-bending folded conductor wire includes at least one of a bare copper stranded conductor core, a tinned copper stranded conductor core, a bare copper single conductor core, and a tinned copper single conductor core.

[0019] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, the insulating outer cladding layers of adjacent straight sections are bonded to each other after being partially melted by heat treatment.

[0020] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, an adhesive layer is further included.

[0021] Adjacent straight sections are bonded to each other through the adhesive layer.

[0022] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, all the bending and winding sections do not overlap in the arrangement direction of the plurality of straight sections.

[0023] Optionally, in the new energy vehicle battery detection circuit with a multi-bending conductor wire, the temperature sensor is an NTC thermistor.

[0024] Optionally, in the new energy vehicle battery detection circuit with the multi-bent conductor, all straight line segments and all bent and winding segments of the multi-bent and folded conductor are located in the same plane.

[0025] Optionally, in the new energy vehicle battery detection circuit with the multi-bent conductor, corresponding plane thicknesses of all straight line segments and all bent and winding segments of the multi-bent and folded conductor are less than 1.2 mm.

[0026] The new energy vehicle battery detection circuit with the multi-bent conductor provided by the utility model, comprising a temperature sensor and a multi-bent and folded conductor, the temperature sensor is arranged on a monitored battery and is electrically connected with a signal transmission bus through the multi-bent and folded conductor, the multi-bent and folded conductor comprises a plurality of bent and winding segments and straight line segments, the bent and winding segments and the straight line segments are alternately arranged on the multi-bent and folded conductor, the straight line segments are parallel to each other, and the insulating outer cladding layers of adjacent straight line segments are bonded to each other, the bonding force between adjacent straight line segments is proportional to the distance between the corresponding bonding position and the temperature sensor, the bonding force is less than a preset structural bearing threshold, and the bent and winding segments do not overlap in the arrangement direction of the straight line segments.

[0027] The multi-bent and folded conductor is provided, when the monitored battery is heated and expanded, adjacent straight line segments in the multi-bent and folded conductor are disconnected and bonded due to bearing excessive force, which is equivalent to releasing additional conductor length, avoiding the situation that the conductor length is insufficient and the force is too large to break and disconnect, and improving the working stability and service life of the new energy vehicle battery detection circuit with the multi-bent conductor, meanwhile, the farther the bonding position of adjacent straight line segments is from the signal transmission bus, the smaller the corresponding bonding force is, which ensures that the bonding between the straight line segments on the side close to the temperature sensor is disconnected first, so that the excessive force is unloaded by the conductor segment close to the temperature sensor before being conducted to the signal transmission bus, further ensuring the safety of the signal transmission bus and greatly reducing the maintenance and repair cost in the later period, in addition, the different bent and winding segments are staggered in the direction perpendicular to the straight line segments, avoiding the situation that the bent and winding segments with a large occupied area are overlapped and extruded in the arrangement direction of the straight line segments, the bonding between adjacent straight line segments is not firm, and the working stability of the new energy vehicle battery detection circuit with the multi-bent conductor is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical scheme of the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0029] Fig. 1 is a partial structure schematic diagram of one specific embodiment of the new energy vehicle battery detection circuit with multi-bent conductor provided by the present application;

[0030] Fig. 2 is a partial structure schematic diagram of one specific embodiment of the new energy vehicle battery detection circuit with multi-bent conductor provided by the present application;

[0031] Fig. 3 is a partial structure schematic diagram of one specific embodiment of the new energy vehicle battery detection circuit with multi-bent conductor provided by the present application.

[0032] In the figure, 10 is a multi-bent folding conductor, 20 is a temperature sensor, 30 is a signal transmission bus, 40 is a monitored battery, 11 is a contact connection, 01 is a first straight section, 02 is a second straight section, 03 is a third straight section, 04 is a fourth straight section, 01' is a first bent section, 02' is a second bent section, 03' is a third bent section, 04' is a fourth bent section, and 05' is a fifth bent section. Specific embodiment

[0033] In order to make the person in the technical field better understand the present application scheme, the present application is further explained in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the present application.

[0034] The core of the present application is to provide a new energy vehicle battery detection circuit with multi-bent conductor, and the structure schematic diagram of one specific embodiment is shown in Fig. 1 and Fig. 2, which is called specific embodiment one, including a temperature sensor 20 and a multi-bent folding conductor 10.

[0035] The temperature sensor 20 is arranged on the monitored battery 40 and is electrically connected with the signal transmission bus 30 through the multi-bent folding conductor 10.

[0036] The multi-bent folding conductor 10 includes a plurality of bent and circuitous sections and straight sections.

[0037] The bent and circuitous sections and the straight sections are alternately arranged on the multi-bent folding conductor 10.

[0038] The plurality of straight sections are parallel to each other, and the insulating outer cladding layers of adjacent straight sections are bonded to each other.

[0039] The bonding force between the adjacent straight line segments is proportional to the distance between the corresponding bonding position and the temperature sensor 20, and the bonding force is less than a preset structural bearing threshold value.

[0040] The plurality of bending and winding segments do not overlap in the arrangement direction of the plurality of straight line segments.

[0041] Fig. 1 and Fig. 2 are schematic diagrams of mutual bonding and mutual unbonding of the multi-bending and folding wire 10 before and after being pulled apart by an external force, respectively. The multi-bending and folding wire 10 can be regarded as a wire obtained by repeatedly folding and bonding a base material wire 300. The multi-bending and folding wire 10 itself is composed of a conductive core and an insulating outer coating wrapped outside the conductive core. For details, refer to Fig. 1 and Fig. 2, in which the contact connection between the conductive core of the multi-bending and folding wire 10 and the signal transmission bus 30 is marked as 11. Preferably, the outer surface of the multi-bending and folding wire 10 further comprises an electrically insulating coating, further improving the electrical performance of the multi-bending and folding wire 10.

[0042] Referring to Fig. 1, the three bending and winding segments are staggered and do not overlap in the arrangement direction of the plurality of straight line segments. The arrangement direction of the straight line segments refers to the direction perpendicular to the extension direction of the straight line segments before being separated and bonded. Further, all the bending and winding segments do not overlap in the arrangement direction of the plurality of straight line segments. Thus, a larger area of mutual overlap and close fit between the straight line segments is achieved, improving the bonding effect between adjacent straight line segments and avoiding the occurrence of the situation that the bonding between adjacent straight line segments is not firm, and the bonding force is less than expected.

[0043] Of course, the temperature sensor 20 needs to be connected to the positive and negative electrodes respectively, therefore, the multi-bending and folding wire 10 comprises a positive signal line and a negative signal line, which are also shown in Fig. 1 and Fig. 2, i.e. a line and b line. The temperature sensor 20 can be replaced by at least one of a light sensor, a current sensor, a humidity sensor and an air sensor. Of course, other types of sensors can also be selected according to actual conditions, which are not limited in the present application. The above-mentioned sensors can comprehensively judge the condition of the monitored battery 40, avoiding accidents.

[0044] Preferably, the temperature sensor 20 is an NTC thermistor (Negative Temperature Coefficient thermistor). The NTC thermistor has a small volume and is suitable for being inserted into the gap of the monitored battery 40 for temperature monitoring.

[0045] Further, all straight segments and all winding segments of the multi-winding folded wire 10 are located in the same plane. By pressing all straight segments and all winding segments of the multi-winding folded wire 10 in the same plane, the new energy vehicle battery detection circuit with the multi-winding wire is in a sheet shape, which is easier to transport and install into the gap of the monitored battery 40, and the installation efficiency is improved.

[0046] The multi-winding folded wire 10 is stable in structure and is not easy to deform, and when subjected to a certain tension, the multi-winding folded wire 10 is extended by degumming, and the winding segment has a certain rebound function after being stretched, so that wire breakage and poor contact caused by thermal expansion and cold contraction of the battery are avoided.

[0047] The structure force threshold is a preset tension threshold, and when the structure force threshold is exceeded, the structure in the circuit may be damaged due to bearing too large tension. It should be noted that the above-mentioned possible damaged structure includes not only the temperature sensor 20 and the multi-winding folded wire 10, but also the signal transmission bus 30. The new energy vehicle battery detection circuit with the multi-winding wire provided by the utility model is an integral whole when leaving the factory, the multi-winding folded wire 10 is rigid when not subjected to external force, and the shape is regular, which greatly facilitates the transportation and installation of the new energy vehicle battery detection circuit with the multi-winding wire. For example, the size of the new energy vehicle battery detection circuit with the multi-winding wire is less than the space occupation of 16mm in width*36mm in length*1mm in thickness.

[0048] Preferably, the bonding force ranges from 5N to 25N, including the end point values, such as any one of 5.0N, 13.1N or 25.0N. The above range is the best range after a large number of theoretical calculations and actual tests. In the above range, neither is the multi-winding folded wire 10 scattered during transportation due to the too small bonding force, which leads to difficult installation, nor is the multi-winding folded wire 10 unable to timely scatter when the monitored battery 40 expands due to the too large bonding force. Of course, other values of the bonding force can also be selected according to actual conditions, which is not limited in the utility model.

[0049] In the utility model, the means that the closer the bonding force is to the temperature sensor 20, the smaller the bonding force is is adopted, the effect of layer-by-layer unloading is formed, and the signal transmission bus 30 which is difficult to repair and high in cost is damaged to the greatest extent.

[0050] Preferably, the insulating outer layer of the multi-winding folded wire 10 includes at least one of a cross-linked polyethylene layer, a polypropylene layer and a polyvinyl chloride layer.

[0051] And / or

[0052] The conductive core of the multi-bending folded wire 10 comprises at least one of a bare copper stranded conductor core, a tinned copper stranded conductor core, a bare copper single conductor core and a tinned copper single conductor core.

[0053] Since the multi-bending folded wire 10 needs to be repeatedly bent and extruded in the manufacturing process, the soft and high-elasticity and bending-resistant metal material is preferably used as the conductive core, so that the bending performance and resilience of the wire are improved, and the wire is prevented from being broken and damaged in the manufacturing process; similarly, the surface of the conductive core is coated with the soft and high-elasticity and bending-resistant insulating material suitable for use in an environment of 105 to 125 degrees Celsius, so that the electrical performance and safety of the wire are ensured.

[0054] As a preferred embodiment, the bending detour section is a circular arc section.

[0055] The ratio of the radius of curvature of the circular arc section to the outer diameter of the multi-bending folded wire 10 is not less than a preset arc stability threshold.

[0056] In the preferred embodiment, the bending detour section is a circular arc section, that is, the multi-bending folded wire 10 is bent into a circular arc shape at the bending detour section, and the ratio of the radius of curvature of the circular arc section to the outer diameter of the multi-bending folded wire 10 is specified, and the preset arc stability threshold can be 2, and of course can be adjusted according to actual conditions. Through the above means, the bending performance and resilience of the wire are improved, and the ability of the wire to resist external force is improved, so that the possibility of the multi-bending folded wire 10 being broken at the bending detour section is greatly reduced, the working stability of the multi-bending folded wire 10 is improved, and the loss caused by bumps during transportation is reduced.

[0057] The temperature sensor 20 can be an NTC thermistor, and the NTC thermistor is popular due to its high precision characteristics, and the temperature of the monitored battery 40 can be measured in real time by using the thermistor.

[0058] The signal transmission bus 30 can adopt an FPC (flexible circuit board) or an HFC (new type of flexible wire harness), and the utility model is not limited here.

[0059] The utility model provides a new energy vehicle battery detection circuit with many bended conductors, including temperature sensor 20 and many bended folding conductors 10, temperature sensor 20 sets up on the battery 40 being monitored, and is connected with signal transmission bus 30 electricity through many bended folding conductors 10, many bended folding conductors 10 includes many bended circuitous sections and straight sections, the bended circuitous section with straight section is alternately arranged on many bended folding conductors 10, many straight sections are parallel with each other, and the insulating outer cladding of adjacent straight sections is bonded with each other, the bonding force between adjacent straight sections is directly proportional to the distance between corresponding bonding place and temperature sensor 20, and the bonding force is less than the preset structure bearing force threshold value, and many bended circuitous sections do not overlap in the arrangement direction of many straight sections.

[0060] On the basis of the first embodiment, the bonding method of the straight sections is further limited to obtain the second embodiment, and the corresponding structural diagram is the same as the above-mentioned first embodiment, including temperature sensor 20 and many bended folding conductors 10.

[0061] The temperature sensor 20 is arranged on the monitored battery 40 and is electrically connected with the signal transmission bus 30 through the many bended folding conductors 10.

[0062] The many bended folding conductors 10 include a plurality of bended circuitous sections and straight sections.

[0063] The bended circuitous sections and the straight sections are alternately arranged on the many bended folding conductors 10.

[0064] Many straight sections are parallel with each other, and the insulating outer cladding of adjacent straight sections is bonded with each other.

[0065] The bonding force between the adjacent straight line segments is proportional to the distance between the corresponding bonding position and the temperature sensor 20, and the bonding force is less than a preset structural bearing threshold;

[0066] The insulating outer cladding of the adjacent straight line segments is heat treated and partially melted to bond with each other.

[0067] The difference between the embodiment and the above embodiment is that the bonding mode of the adjacent straight line segments is further defined in the embodiment, and the rest of the structure is the same as that of the above embodiment, which will not be described here.

[0068] In the embodiment, the bonding between the adjacent straight line segments is formed by melting the heat treated insulating outer cladding, without the need for additional adhesive, which simplifies the structure and process, reduces production cost, improves production efficiency, and at the same time, the heat treatment can have a better shaping effect on the multi-bent folded wire 10, so that the wire shape is maintained as preset, facilitating the process standardization in subsequent mass production.

[0069] Of course, as another embodiment, it also includes an adhesive layer;

[0070] The adjacent straight line segments are bonded with each other through the adhesive layer.

[0071] In other words, in the embodiment, the bonding between the adjacent straight line segments is achieved by dispensing the adhesive layer, which has stronger universality and is more suitable for large-scale production. Of course, adjustments can be made according to actual conditions, and the utility model is not limited herein.

[0072] A specific embodiment of the application of the new energy vehicle battery detection circuit with the multi-bent wire to a new energy vehicle is given below, that is, a new energy vehicle temperature detection device and its wire, as shown in FIG. 3, which comprises an NTC thermistor, two positive and negative signal lines connected to each other at the middle position on one side of the NTC thermistor, of course, the positive and negative signal lines together constitute the multi-bent folded wire 10, the multi-bent folded wire 10 comprises an a signal line and a b signal line, both of which are composed of an internal conductor and an external insulating material, the cross-sectional area of the internal conductor is circular, composed of a plurality of tinned soft copper strands, the single wire diameter is 0.07 mm, the cross-sectional area of the twisted strands is 0.152 mm2, the minimum value is 0.152 mm, the maximum value is 0.156 mm, the average value is 0.154 mm, the lay is 8-10 mm, and the lay direction is left.

[0073] The external insulating material is wrapped, the material is PVC, the outer diameter is 0.95±0.05 mm, and the cross-sectional area is 0.2-0.25 mm 2, concentricity > 45%, preferably PVC material meeting the T3 standard in ISO 19642, suitable for use at temperatures 105-125 degrees.

[0074] One end of the wire is welded to the middle of one side of the NTC thermistor, and the other end of the wire is welded to the HFC data line flat cable (i.e. the signal transmission bus 30) of the new energy vehicle. The diameter of the wire is 1 mm. Because the installation space is limited, the thickness or total height of the data line must be below 1.2 mm. Therefore, the wires cannot overlap each other, otherwise the height will exceed this limit. The a signal line and the b signal line are arranged in a multiple S-shaped layout and distributed in a space with a length of 36 mm, a width of 16 mm, and a height of 1 mm.

[0075] The wire includes a first bending part 01', a second bending part 02', a third bending part 03', a fourth bending part 04', and a fifth bending part 05'. The first bending part 01' has a bending angle of 90 degrees, the second bending part 02' has a bending angle of 180 degrees, the third bending part 03' has a bending angle of 180 degrees, the fourth bending part 04' has a bending angle of 180 degrees, and the fifth bending part 05' has different bending angles due to the separation of the a signal line and the b signal line. The a signal line has a bending angle of 180 degrees, and the b signal line has a bending angle of 20 degrees.

[0076] When the wire is in the first bending part 01', the a signal line of the wire is inside the b signal line. When the wire is in the second bending part 02', the b signal line of the wire is inside the a signal line. When the wire is in the third bending part 03', the a signal line of the wire is inside the b signal line. When the wire is in the fourth bending part 04', the b signal line of the wire is inside the a signal line. When the wire is in the fifth bending part 05', the b signal line and the a signal line of the wire are separated from each other and bent in different directions according to the needs of the contact points. When the wire is in the fifth bending part 05', the end conductor of the wire is exposed from the insulation layer. The end position of the wire is higher than the fifth bending part 05'.

[0077] The wire further includes a first straight part 01, a second straight part 02, a third straight part 03, and a fourth straight part 04. The first straight part 01 is between the first bending part 01' and the second bending part 02', the second straight part 02 is between the second bending part 02' and the third bending part 03', the third straight part 03 is between the third bending part 03' and the fourth bending part 04', and the fourth straight part 04 is between the fourth bending part 04' and the fifth bending part 05'.

[0078] The first straight part 01 and the second straight part 02 are weakly adhered by means of mold heating or glue dropping; the second straight part 02 and the third straight part 03 are weakly adhered by means of mold heating or glue dropping; the third straight part 03 and the fourth straight part 04 are strongly adhered by means of mold heating or glue dropping; the degree of weak adhesion gradually increases from bottom to top until the uppermost layer is strongly adhered, and the maximum tensile force that each layer can withstand is 5N, 10N and 25N respectively, so as to ensure that the upper end of the wire is basically not affected by the tensile force generated by the thermal expansion and contraction of the battery cell when the hfc data line of the new energy vehicle is welded. (After the wires in the first two layers are pulled apart and extended, they are removed), thereby protecting the hfc data line of the new energy vehicle from being pulled and damaged.

[0079] Each bending part is also provided with a detour arc, and the radian of each detour arc is greater than 2 times the outer diameter of a single wire, so as to improve the bending performance and resilience of the wire. The radius of the detour arc of the first bending part 01' is 2.2mm, the radius of the detour arc of the second bending part 02' is 3mm, and the radius of the detour arc of the third bending part 03' is 2.2mm. The bending parts of each upper and lower layer are arranged staggered, so as to maximize the use of limited space, and the wires in each layer will not be interlaced and stacked, and finally the entire wire is kept in a space with a width*length*thickness of 16*36*1.0mm.

[0080] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts are described in the method part.

[0081] It should be noted that, in the specification, the relationship 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 the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0082] The new energy vehicle battery detection circuit with the multi-bending conductor wire is described in detail. The principle and implementation of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method and core idea of the present application. It should be pointed out that for ordinary skilled persons in the technical field, without departing from the principle of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the present application.

Claims

1. A new energy vehicle battery detection circuit with multi-bending wires, characterized in that, The temperature sensor and the multi-bend folded wire are provided on the battery to be monitored and electrically connected with the signal transmission bus through the multi-bend folded wire. The multi-bend folded wire comprises a plurality of bend and winding sections and straight sections. The bend and winding sections and the straight sections are alternately arranged on the multi-bend folded wire. The straight sections are parallel to each other, and the insulating outer cladding layers of adjacent straight sections are bonded to each other. The bonding force between adjacent straight sections is proportional to the distance from the corresponding bonding position to the temperature sensor, and the bonding force is less than a preset structural bearing threshold. The bend and winding sections do not overlap in the arrangement direction of the straight sections. The bend and winding sections are circular arc sections.

2. The new energy vehicle battery detection circuit with multi-bent wires according to claim 1, characterized in that, The ratio of the radius of the circular arc section to the outer diameter of the multi-bend folded wire is not less than a preset arc stability threshold. The bonding force ranges from 5N to 25N, including the end values.

3. The new energy vehicle battery detection circuit with multi-bending wires according to claim 1, characterized in that, The insulating outer cladding layer of the multi-bend folded wire comprises at least one of a cross-linked polyethylene layer, a polypropylene layer, and a polyvinyl chloride layer.

4. The new energy vehicle battery detection circuit with multi-bent wires according to claim 1, characterized in that, And / or The conductive core of the multi-bend folded wire comprises at least one of a bare copper stranded conductor core, a tin-plated copper stranded conductor core, a bare copper single conductor core, and a tin-plated copper single conductor core. The insulating outer cladding layers of adjacent straight sections are bonded to each other by being partially melted through heat treatment.

5. The new energy vehicle battery detection circuit with multi-bent wires according to claim 1, characterized in that, Further comprising an adhesive layer.

6. The new energy vehicle battery detection circuit with multi-bent wires according to claim 1, characterized in that, Adjacent straight sections are bonded to each other through the adhesive layer. All bend and winding sections do not overlap in the arrangement direction of the straight sections.

7. The new energy vehicle battery detection circuit with multi-bent wires according to claim 1, characterized in that, The temperature sensor is an NTC thermistor.

8. The new energy vehicle battery detection circuit with multi-bent wires of claim 1, wherein, All straight sections and all bend and winding sections of the multi-bend folded wire are located in the same plane.

9. The new energy vehicle battery detection circuit with multi-bent wires according to any one of claims 1 to 8, characterized in that, The corresponding plane thickness of all straight sections and all bend and winding sections of the multi-bend folded wire is less than 1.2mm.

10. The new energy vehicle battery detection circuit with multi-bent wires according to claim 9, characterized in that, ​

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