Device for determining electrical parameter of bus bar
By designing equipment for measuring bus bar temperature and voltage, the problems of instability and insufficient accuracy of measurement in the prior art are solved, and the precise determination of bus bar electrical parameters is achieved.
Patent Information
- Application Number
- CN202411845956.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-12-18
- Filing Date
- 2024-12-16
- Publication Date
- 2025-06-20
AI Technical Summary
Existing measurement devices for determining bus bar electrical parameters are not robust enough and have insufficient measurement accuracy.
An apparatus is designed, including a first measuring system for measuring the temperature of the bus bar, a second measuring system for measuring the voltage of the bus bar, and providing these signals to the determination unit through an interface system to accurately determine the electrical parameters of the bus bar.
By directly and accurately measuring the temperature and voltage of the bus bar, the robustness of the equipment and measurement accuracy are improved, and the electrical parameters of the bus bar can be determined more accurately.
Smart Images
Figure CN120177849A_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to a device for determining electrical parameters of a bus bar, a bus bar system used in a vehicle, and a method for determining electrical parameters of a bus bar. Background Art
[0002] Known measuring devices for determining the current, resistance or voltage of a bus bar use two types of measurements to determine these electrical parameters. These two types of measurements can be voltage measurements using a shunt resistor including a defined resistance, and temperature measurements using a temperature measuring device.
[0003] It is known that such measuring devices are not very robust, and the measurements are not precise enough or desirable for various applications. Summary of the Invention
[0004] The above problems are at least partially solved or alleviated by the subject matter of the present disclosure.
[0005] According to a first aspect of the present disclosure, there is provided a device for determining electrical parameters of a bus bar, the device comprising: a first measurement system for attaching to the bus bar, the first measurement system being configured to provide a first signal indicative of the temperature of the bus bar; a second measurement system for attaching to the bus bar, the second measurement system being configured to provide a second signal indicative of the voltage of the bus bar; and an interface system configured to provide the first signal and the second signal to a determination unit for determining the electrical parameters of the bus bar based on the first signal and the second signal.
[0006] By attaching the first measurement system and the second measurement system to the bus bar, precise measurements with little or no measurement deviation can be performed. The result of the measurement can be represented by or included in the first signal and the second signal. By providing these to the determination unit, a particularly precise and robust determination of the electrical parameters of the bus bar can be made.
[0007] In particular, the first measurement system can be configured to be attached to a busbar. For example, the first measurement system can include a surface, which can be configured to be welded and / or brazed to the busbar by selecting the material of the surface. For example, the surface can be present on a layer element of the first measurement system, as described below. Additionally, the second measurement system can be configured to be attached to a busbar. For example, the second measurement system can include a surface, which can be configured to be welded and / or brazed to the busbar by selecting the material of the surface. Alternatively or additionally, the second measurement system can include fastening means for attaching to the busbar, such as threaded holes or bolts or screws. For example, the surface or the fastening means can be provided on one or more mounting units of the second measurement system. Attaching the first and second measurement systems to the busbar provides direct and precise measurement of the temperature and voltage of the busbar, contributing to the robustness and precision of the device.
[0008] When electrical energy is supplied to the busbar, electrical parameters of the busbar can be determined. The electrical energy can be provided by a combination of an electric current (expressed as current in amperes) and an electric potential (expressed as voltage in volts), which is provided by an electrical energy generator, an electrical energy storage device, or any other of the previously mentioned examples for providing electrical energy. The electrical parameters can relate to the supplied electrical energy. For example, the electrical parameters can be at least one of the voltage, current, and resistance of the busbar.
[0009] The busbar can be configured to supply electrical energy from an electrical energy source (such as at least one of an electrical energy generator and an electrical energy storage device) to an electrical energy consumer (such as at least one of an electric motor and a control device) for its operation. The busbar can include at least one of a strip, a wire, and a track. The busbar can be configured to transmit the electric current of the electrical energy and provide the electric potential of the electrical energy.
[0010] The determination unit can be configured as, for example, a computer, a processor, and / or a microcontroller. The interface system can be configured to be connected to the determination unit, or in other words, can be connectable to the determination unit. For example, the interface system can include a corresponding connector or other unit for establishing this connection. The first signal and the second signal can be provided to the determination unit via such a connection.
[0011] For example, the first signal and the second signal can be electrical signals and / or data signals. For example, the first signal and the second signal can indicate the temperature or voltage of the busbar based on the voltage of their signals, especially the voltage amplitude. Additionally or alternatively, for example, the first signal and the second signal can contain data or information indicating the temperature or voltage of the busbar, for example, in the form of computer-readable code or text.
[0012] In one example, the second measurement system may include a conductive mounting unit. Additionally, the second measurement system may include a conductive carrier unit for carrying at least a portion of the interface system. The carrier unit may be mountable to the bus bar via the mounting unit to electrically connect the interface system to the bus bar. The carrier unit may be particularly configured to carry at least a portion of the interface system, such as at least one of its components, such as an amplifier and / or a determination unit as described below. For example, the carrier unit may have connection interfaces for connecting the amplifier and / or the determination unit thereto. For example, the mounting unit may be made of metal and / or have a cylindrical shape. For example, the mounting unit may be designed as a pin. Thus, the second signal may be provided to the interface system as a voltage, for example, via the mounting unit and the carrier unit. The mounting unit may be configured, for example, as at least one of a strip, a wire, and a track for connecting the measurement system to the bus bar. Alternatively or additionally, the mounting unit may be configured to connect the measurement system to a first potential and a second potential of the bus bar, where there may be a potential difference between the first potential and the second potential.
[0013] In one example, the carrier unit may be a printed circuit board (PCB). The PCB may have tracks for transferring the second signal from the mounting unit to the interface system, which further provides the first signal and the second signal to the determination unit.
[0014] In one example, the first measurement system may include a layer unit for attachment to the bus bar. The layer unit may include at least two layer elements, at least one of the top layer element and the bottom layer element of the layer elements being conductive. The first measurement system may further include a measurement unit thermally connectable to the layer unit for measuring the temperature of the bus bar via the layer elements. The measurement unit may also be configured to generate a first signal. For example, the measurement unit may include a temperature sensor and / or an integrated circuit. The at least two conductive layer elements may transfer the temperature of the bus bar to the measurement unit. Thus, by having conductive layer elements, the layer unit can conduct the temperature of the bus bar thermally to the measurement unit for measuring the temperature of the bus bar and generating a first signal.
[0015] In one example, at least one of the top layer element and the bottom layer element may include at least one of copper and aluminum. Thus, the top layer element and / or the bottom layer element may provide particularly good electrical conductivity and thermal conductivity for high precision in temperature measurement.
[0016] In one example, the layer unit may include three or more layer elements. For example, the layer unit may include four, five, or more layer elements. The other layer elements in addition to the top layer element and / or the bottom layer element may have other properties than conductivity, such as electrical isolation and / or current isolation.
[0017] In one example, at least one intermediate layer element in the layer element can be arranged between the top layer element and the bottom layer element and can be electrically isolated. Thereby, the layer unit can be configured to isolate the electrical energy of the busbar from the measuring unit. Thereby, the layer unit can protect the measuring unit from the electrical energy carried by the busbar, but still directly transfer the temperature of the busbar to the measuring unit, enabling particularly accurate temperature measurement.
[0018] In one example, at least one intermediate layer element can include a dielectric material. This provides electrical isolation performance and prevents the transfer of electrical energy, while allowing heat transfer through the layer unit. The dielectric material can be, for example, a resin material.
[0019] In one example, the interface system can include an amplifier configured to amplify the second signal. The amplifier can be configured for signal conditioning. For example, the amplifier can be a differential amplifier or an isolation amplifier. For example, it can be used as a DC voltage amplifier. Thereby, the second signal can be reliably received at the determination unit, and the processing of the second signal for determining the electrical parameter can be improved.
[0020] In one example, the device can include a determination unit. The determination unit can include data indicating the correlation between the temperature of the busbar and the resistance of the busbar. The determination unit can be configured to determine the resistance of the busbar based on the first signal and this data. In addition, the determination unit can be configured to determine the electrical parameter of the busbar based on the second signal and the determined resistance of the busbar. Therefore, the electrical parameter (such as voltage) of the busbar can be determined according to the resistance of the busbar that may be affected by temperature. When determining the resistance, calibration of the determination unit for determining the electrical parameter can be provided. The correlation between the temperature and the resistance of the busbar can be known, for example, according to experiments, formulas, models, or the like. Therefore, this data can include or be based on one or more look-up tables, one or more formulas, and / or one or more models. Thereby, the accuracy of the electrical parameter determination performed by the device can be improved.
[0021] According to a second aspect of the present disclosure, there is provided a busbar system for use in a vehicle, the busbar system including a busbar and a device according to the first aspect of the present disclosure, a first measurement system is attached to the busbar, and the interface system is electrically connected to the busbar via a second measurement system. Therefore, the second measurement system can be attached to the busbar.
[0022] In one example, at least one of the first measurement system and the second measurement system can be attached to a first portion of the bus bar, where the first portion has a smaller cross-section than a second portion of the bus bar. The second portion or two second portions can be the remaining portion of the bus bar. The first portion can be located between the two second portions. It has been found that when a bus bar with such a smaller cross-sectional portion is provided and the device is provided at the smaller cross-sectional portion, the measurement accuracy and robustness of the device can be improved. For example, at least one of the measurements can be performed perpendicular to the extension direction of the bus bar.
[0023] In one example, the attachment of at least one of the first measurement system and the second measurement system to the bus bar can include a welded connection or a brazed connection. As a result, the electrical conductivity and thermal conductivity increase, leading to better measurement accuracy of the device.
[0024] According to a third aspect of the present disclosure, there is provided a method for determining an electrical parameter of a bus bar by means of a device according to the first aspect of the present disclosure or a device in a bus bar system according to the second aspect of the present disclosure, the method comprising:
[0025] - Receiving a first signal;
[0026] - Receiving a second signal; and
[0027] - Determining the electrical parameter of the bus bar based on the first signal and the second signal.
[0028] The method can be at least partially implemented by a computer. Therefore, one, more, or all steps of the method can be performed by a computer, in particular the determination unit of the device. The method can be implemented in software, or in hardware, or in software and hardware. In addition, the method can be executed by computer program instructions running on a device providing data processing functions. The data processing device can be a suitable computing device, such as an electronic control module, etc., which can also be a distributed computer system. The data processing device or computer can respectively include one or more of a processor, a memory, a data interface, etc.
[0029] In one example, the determination of the electrical parameter can include determining the resistance of the bus bar based on the first signal and data indicating the correlation between the temperature of the bus bar and the resistance of the bus bar, and determining the electrical parameter of the bus bar based on the second signal and the determined resistance of the bus bar.
[0030] It should be noted that the above examples can be combined with each other regardless of the aspects involved. Therefore, the method can be combined with structural features, and similarly, the device can be combined with the features described above regarding the method.
[0031] These and other aspects of the present disclosure will become apparent and be elucidated with reference to the embodiments described below. Description of the Drawings
[0032] Examples of the present disclosure will be described below with reference to the following drawings.
[0033] Figure 1 A schematic diagram of a busbar system in a vehicle is shown;
[0034] Figure 2 Shows Figure 1 An exemplary illustration of the busbar system of
[0035] Figure 3 Shows Figure 1 And Figure 2 An exemplary illustration of the layer unit of the first measurement system of the busbar system of
[0036] Figure 4 Shows a method for determining the electrical parameters of a busbar by means of a device for the busbar system of Figure 1 , Figure 2 And Figure 3 A schematic diagram of the busbar system. Detailed Description of the Invention
[0037] It should be noted that the drawings are only schematic representations and are only used to illustrate the examples of the present disclosure. Identical or equivalent elements have the same reference numerals in principle.
[0038] Figure 1 A schematic diagram of device 10 is shown. Device 10 is mounted to busbar 50 in vehicle 1. Device 10 and busbar 50 form busbar system 2. Busbar 50 can be used to transfer electrical energy, for example, from an electrical energy source to an electrical energy consumer within vehicle 1. Device 10 can be used to determine electrical parameters (such as current) of the electrical energy transferred by busbar 50, for example, a current in the range of 0 to 1000 amperes, and has the purpose of bidirectional current determination.
[0039] From Figure 1 And Figure 2 It can be further seen that device 10 includes a first measurement system 20 for measuring the temperature of busbar 50 (only partially shown herein) and a second measurement system 30 for measuring the voltage of busbar 50 (or in other words, the electrical energy transmitted or carried by busbar 50).
[0040] The first measurement system 20 includes a layer unit 22, a plurality of layer elements 24.1, 24.2, 24.3, 24.4, 24.5, and a measurement unit 26. The layer unit 22 is attached to busbar 50. Figure 3 A detailed illustration of the first measurement system 20 is shown in
[0041] The number of the illustrated layer elements 24.1, 24.2, 24.3, 24.4, 24.5 is merely exemplary and can be more or less. In this example, five layer elements 24.1, 24.2, 24.3, 24.4, 24.5 are shown. In this example, the top layer element 24.1, the middle layer element 24.3, and the bottom layer element 24.5 are conductive and can include, for example, copper and / or aluminum or be made of copper and / or aluminum. Thus, they also have the ability to transfer heat from the bus bar 50 to the measuring unit 26, which is configured to measure the temperature of the bus bar 50 and generate a first signal indicative of the temperature of the bus bar 50. Additionally, for example, the bottom layer element 24.5 can be soldered or brazed to the bus bar 50.
[0042] In this example, the additional middle layer elements 24.2, 24.4 are galvanically isolating and can include, for example, a dielectric material or be made of a dielectric material. Thus, these prevent electrical energy from being conducted from the bus bar 50 to the measuring unit 26 and potentially damaging it, while allowing heat to pass through them for temperature measurement.
[0043] The second measurement system 30 is attached to the bus bar 50 via the conductive mounting units 32.1, 32.2, which are exemplarily shown herein as metallic and cylindrical. The mounting units 32.1, 32.2 attach the conductive carrier unit 34 of the second measurement system 30 to the bus bar 50, for example, by a threaded connection, a bolt connection, a brazed connection, and / or a welded connection. The carrier unit 34 is formed herein as a printed circuit board (PCB). The interface system 40 is at least partially mounted on the carrier unit 34. This means that at least one interface unit (such as a connector or a modulation unit) of the interface system 40 is mounted on the carrier unit 34. In this example, the amplifier 42 is mounted on the carrier unit 34 and is thus carried by the carrier unit 34. The traces of the carrier unit 34 lead from the mounting units 32.1, 32.2 to the interface system 40, which is the amplifier 42 in this example. The traces can have substantially equal lengths and / or the amplifier 42 can be mounted in the central region of the carrier unit 34. Thereby, gain errors and voltage errors at very low currents can be reduced or prevented. The second measurement system 30 thus provides a second signal indicative of the voltage of the bus bar 50 to the interface system 40. More precisely, the second signal can be the electrical energy carried by the bus bar 50 and transferred to the interface system 40 via the second measurement system 30, and thus indicates the voltage of the electrical energy carried by the bus bar 50.
[0044] The interface system 40 can also include or be connected to a determination unit 44. In Figure 2In the example, the determination unit 44 is provided on the carrier unit 34 together with the amplifier 42. However, alternatively, the determination unit 44 can also be provided elsewhere and connected to the interface system 40, in particular to the amplifier 42.
[0045] Similarly, the interface system 40 is connected to the first measurement system 20, in particular to its measurement unit 26. Thus, the interface system 40 can receive both the first signal and the second signal and provide them to the determination unit 44, which can determine the electrical parameters of the busbar 50 based thereon. The electrical parameters can be current and / or voltage, for example, where the voltage can be an adopted or modified voltage as indicated by the second signal. In other words, the voltage as the electrical parameter can be a voltage indicated by the second signal and modified based on the temperature of the busbar 50 indicated by the first signal.
[0046] From Figure 2 It can be seen that the device 10 is attached to the busbar 50 at a first part 52 of the busbar 50, the cross-section of the first part 52 being smaller than the cross-sections of the two second parts 54 of the busbar 50, and the first part 52 being located between the two second parts 54 having a larger cross-section. The extension of the busbar 50 in length can be in the direction along the two second parts 54. In other words, the first part 52 can be an intermediate part along the length of the busbar 50, in particular between the second parts 54 having a larger cross-section. Thus, the busbar 50 can generally extend with a cross-section corresponding to that shown for the second parts 54, wherein, along its length extension, the first part 52 having a smaller cross-section can be provided for attaching the first measurement system 20 and the second measurement system 30 thereto.
[0047] Figure 4 An example of a method 100 for determining the electrical parameters of the busbar 50 by the device 10 when the busbar 50 carries electrical energy is shown. For example, the method 100 can be executed by the determination unit 44.
[0048] In step 110, the first signal is being received. Prior thereto, a temperature measurement can be performed by the first measurement system 20.
[0049] In step 120, the second signal is being received. Prior thereto, signal conditioning can be performed by the amplifier 42. The signal conditioning can include at least one of noise control of the second signal and amplification of the second signal.
[0050] In step 130, the electrical parameters of the bus bar 50 are determined based on the received first signal and second signal. Determining the electrical parameters may include determining the resistance of the bus bar 50 based on the first signal and data indicating the correlation between the temperature of the bus bar and the resistance of the bus bar. For example, the data may be stored in the memory of the determination unit 44. The determination of the electrical parameters of the bus bar 50 may then be based on the second signal and the determined resistance of the bus bar 50.
[0051] As used herein, the phrase "at least one" with respect to a list of one or more entities should be understood to mean at least one entity selected from any one or more of the entities in the list of entities, but not necessarily including at least one of each entity specifically listed in the list of entities, and not excluding any combination of the entities in the list of entities. This definition also allows entities other than those specifically identified within the list of entities referred to by the phrase "at least one" to optionally exist, whether related or unrelated to those specifically identified entities. Thus, as a non-limiting example, "at least one of A and B" (or equivalently, "at least one of A or B", or equivalently, "at least one of A and / or B") can, in one example, refer to at least one, optionally including more than one A, with no B present (and optionally including entities other than B); in another example, refer to at least one, optionally including more than one B, with no A present (and optionally including entities other than A); in yet another example, refer to at least one (optionally including more than one) A and at least one (optionally including more than one) B (and optionally including other entities). In other words, the phrases "at least one", "one or more", and "and / or" are open-ended expressions that are both conjunctive and disjunctive in operation. For example, each of the expressions "at least one of A, B, and C", "at least one of A, B, or C", "one or more of A, B, and C", "one or more of A, B, or C", and "A, B, and / or C" can mean A alone, B alone, C alone, A and B together, A and C together, B and C together, A, B, and C together, and optionally any of the foregoing in combination with at least one other entity.
[0052] By studying the drawings, the disclosure, and the appended claims, those skilled in the art can understand and implement other variations of the disclosed examples when practicing the claimed subject matter. In particular, the various parts / functions of the above-described examples can also be combined with each other. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used advantageously. Any reference signs in the claims should not be construed as limiting the scope of the claims.
[0053] List of Reference Signs
[0054] 1 vehicle
[0055] 10 device
[0056] 20 first measurement system
[0057] 22 layer unit
[0058] 24 layer element
[0059] 26 measurement unit
[0060] 30 second measurement system
[0061] 32 mounting unit
[0062] 34 carrier unit
[0063] 40 interface system
[0064] 42 amplifier
[0065] 44 determination unit
[0066] 50 bus bar
[0067] 52 first part
[0068] 54 second part
[0069] 100 method
[0070] 110, 120, 130 steps
Claims
1. A device (10) for determining an electrical parameter of a busbar (50), the device (10) comprising: a first measurement system (20) for attachment to the bus bar (50), the first measurement system (20) being configured to provide a first signal indicative of a temperature of the bus bar (50); a second measurement system (30) for attachment to the bus bar (50), the second measurement system (30) being configured to provide a second signal indicative of a voltage of the bus bar (50); and An interface system (40) is configured to provide the first signal and the second signal to a determination unit (44) for determining an electrical parameter of the busbar (50) based on the first signal and the second signal.
2. The device (10) according to claim 1, the second measuring system (30) comprises a conductive mounting unit (32.1, 32.2) and a conductive carrier unit (34) for carrying at least a part of the interface system (40), and the carrier unit (34) can be mounted to the bus bar (50) via the mounting unit (32.1, 32.2) to electrically connect the interface system (40) to the bus bar (50).
3. The device (10) according to claim 2, the carrier unit (34) being a printed circuit board.
4. The device (10) according to any of the preceding claims, the first measurement system (20) comprising a layer unit (22) for attachment to the bus bar (50), the layer unit (22) comprising at least two layer elements (24.1, 24.2, 24.3, 24.4, 24.5), at least one of the top layer element (24.1) and the bottom layer element (24.5) of the layer elements (24.1, 24.2, 24.3, 24.4, 24.5) being electrically conductive, and the first measurement system (20) comprising a measurement unit (26) thermally connectable to the layer unit (22) for measuring the temperature of the bus bar (50) via the layer elements (24.1, 24.2, 24.3, 24.4, 24.5).
5. The apparatus (10) of claim 4, at least one of the top element (24.1) and the bottom element (24.5) comprising at least one of copper and aluminum.
6. The device (10) according to claim 4 or 5, the layer unit (22) comprising three or more layer elements (24.1, 24.2, 24.3, 24.4, 24.5).
7. The device (10) according to any one of claims 4 to 6, wherein at least one intermediate layer element (24.2, 24.4) of the layer elements (24.1, 24.2, 24.3, 24.4, 24.5) arranged between the top layer element (24.1) and the bottom layer element (24.5) is electrically isolated.
8. The device (10) according to claim 7, the at least one intermediate layer element (24.2, 24.4) comprising a dielectric material.
9. The device (10) according to any one of the preceding claims, the interface system (40) comprising an amplifier (42) configured to amplify the second signal.
10. The device (10) according to any one of the preceding claims, the device (10) comprising the determination unit (44), the determination unit (44) comprising data indicating a correlation between the temperature of the bus bar (50) and the resistance of the bus bar (50), the determination unit (44) being configured to determine the resistance of the bus bar (50) based on the first signal and the data, and the determination unit (44) being configured to determine an electrical parameter of the bus bar (50) based on the second signal and the determined resistance of the bus bar (50).
11. A busbar system (2) for use in a vehicle (1), the busbar system (2) comprising a busbar (50) and a device (10) according to any of the preceding claims, the first measuring system (20) being attached to the busbar (50) and the interface system (40) being electrically connected to the busbar (50) via the second measuring system (30).
12. The busbar system (2) of claim 11, wherein at least one of the first measurement system (20) and the second measurement system (30) is attached to a first portion (52) of the busbar (50), the first portion (52) having a cross-section that is smaller than a cross-section of a second portion (54) of the busbar (50).
13. The busbar system (2) of claim 11 or 12, the attachment of at least one of the first measurement system (20) and the second measurement system (30) to the busbar (50) comprising a welded connection or a soldered connection.
14. A method (100) for determining an electrical parameter of a busbar (50) by means of a device (10) according to any one of the preceding claims, the method (100) comprising: - receiving a first signal; - receiving a second signal; and - determining an electrical parameter of the busbar (50) based on the first signal and the second signal.
15. The method (100) of claim 14, wherein determining the electrical parameter comprises determining the resistance of the bus bar (50) based on the first signal and data indicating a correlation between the temperature of the bus bar (50) and the resistance of the bus bar (50), and determining the electrical parameter of the bus bar (50) based on the second signal and the determined resistance of the bus bar (50).