A bms battery cell temperature simulation device

Abstract

The utility model discloses a kind of BMS battery monomer temperature simulation device, comprising: control unit, D type latch, multiple relays and resistance, each relay connects resistance, all resistance is connected with temperature sampling connector after series connection, controller is connected with D type latch;D type latch is connected with relay. Through the device of the utility model can be realized not only make up the blank of prior art, and improve the accuracy of temperature simulation and application range, it has important significance for improving the reliability and security of BMS system.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a BMS battery cell temperature simulation device. Background Technology

[0002] Battery management systems (BMS) play a crucial role in electric vehicles, energy storage systems, and other applications that rely on battery power. Besides monitoring individual cell voltage and current, monitoring and managing cell temperature is also a key factor in ensuring the safe and efficient operation of the battery pack. However, existing temperature measurements primarily rely on temperature sensors, which, while providing basic temperature information, have limitations in simulating temperature changes under extreme conditions. This restricts the BMS's responsiveness in abnormal temperature environments and the effectiveness of related strategy testing.

[0003] To overcome the above shortcomings, existing technical documents such as "A Battery Pack Simulator" and "A Method and Apparatus for Simulating NTC Sensor Parameters" provide partial solutions, but they fail to fully meet the requirements for wide-range and high-precision cell temperature simulation. The former focuses on overall performance simulation, while the latter focuses on sensor parameter simulation; neither of them explores in depth how to achieve precise control and simulation over a wide temperature range.

[0004] Therefore, it is necessary to design a new device that not only fills the gap in existing technology but also improves the accuracy and applicability of temperature simulation, which is of great significance for improving the reliability and safety of BMS systems. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a BMS battery cell temperature simulation device.

[0006] To solve the above-mentioned technical problems, the purpose of this utility model is achieved through the following technical solution: providing a BMS battery cell temperature simulation device, including: a control unit, a D-type latch, multiple relays and resistors, each of the relays being connected to a resistor, all the resistors being connected in series to the BMS battery, the control unit being connected to the D-type latch, and the D-type latch being connected to the relays.

[0007] The further technical solution is as follows: the D-type latch includes an eight-channel D-type latch.

[0008] The further technical solution is as follows: there are multiple D-type latches, and each D-type latch is connected to multiple relays.

[0009] A further technical solution is that the resistors connected to the multiple relays connected to each of the D-type latches are connected in series.

[0010] A further technical solution is that each of the D-type latches is connected to eight of the relays.

[0011] A further technical solution is that multiple relays are respectively connected to resistors of different orders of magnitude.

[0012] A further technical solution includes an input power supply, which is connected to the control unit.

[0013] The further technical solution is as follows: the D-type latch is connected to the input power supply.

[0014] The further technical solution is as follows: the control unit includes a controller U79.

[0015] A further technical solution is as follows: the input power supply is connected to the D-type latch through a current-limiting resistor.

[0016] The advantages of this invention compared to existing technologies are as follows: This invention integrates a control unit, a D-type latch, multiple relays, and resistors. Each relay is connected to a specific resistance value, and all resistors are connected in series to a temperature sampling connector. The controller sends commands to the D-type latch, thereby precisely controlling the closing or opening of the relays to select the appropriate resistor combination. This design not only fills the gap in existing technologies for high-precision and wide-range battery cell temperature simulation but also greatly improves the accuracy and applicability of temperature simulation. Its flexibility and accuracy are crucial for improving the reliability and safety of the BMS system under different operating conditions, thereby ensuring that the battery management system can operate stably in various environments, effectively extending battery life and improving the overall performance of the system.

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic block diagram of a BMS battery cell temperature simulation device provided for an embodiment of this utility model;

[0020] Figure 2 A specific circuit diagram of a BMS battery cell temperature simulation device provided for an embodiment of this utility model;

[0021] Explanation of the markings in the image:

[0022] 10. Control unit; 20. D-type latch; 30. Relay; 40. Resistor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0024] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0026] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0027] Battery management systems (BMS) are crucial for ensuring the safe and efficient operation of battery packs in applications such as electric vehicles and energy storage systems. They require not only monitoring the voltage and current of individual cells but also precisely managing their temperature. However, current temperature sensors, which are primarily relied upon, have limitations in simulating temperature changes under extreme conditions, affecting the BMS's responsiveness in abnormal temperature environments and the effectiveness of strategy testing. While existing technical literature, such as "A Battery Pack Simulator" and "A Method and Apparatus for Simulating NTC Sensor Parameters," provides some solutions, they fail to fully meet the high-precision simulation requirements across a wide temperature range. Therefore, designing a new device to fill the technological gap and improve the accuracy and applicability of temperature simulation is of great significance for enhancing the reliability and safety of BMS systems.

[0028] Therefore, this utility model provides a BMS battery cell temperature simulation device, which not only fills the gap in the prior art, but also improves the accuracy and applicability of temperature simulation, which is of great significance for improving the reliability and safety of BMS system.

[0029] Specifically, this BMS battery cell temperature simulation device achieves accurate simulation of battery cell temperature by integrating a control unit 10, D-type latches 20, multiple relays 30, and resistors 40. Each relay 30 is connected to resistors 40 of varying magnitudes and connected in series to the temperature sampling connector. The D-type latches 20 (especially the eight-channel D-type latches 20) work in conjunction with the controller to precisely control the state of each relay 30, thereby changing the total resistance 40 in the circuit to simulate different temperature conditions. This design not only overcomes the shortcomings of existing technologies in terms of wide-range and high-precision temperature simulation but also allows for accurate temperature simulation over a wider temperature range, enhancing the BMS's responsiveness under abnormal temperature environments and the effectiveness of strategy testing. Furthermore, by introducing an input power supply and connecting it to the D-type latches 20 through current-limiting resistors 40, the stability and safety of the entire system are ensured, which is of great significance for improving the reliability and safety of the BMS system.

[0030] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0031] Please see Figure 1 A BMS battery cell temperature simulation device includes: a control unit 10, a D-type latch 20, multiple relays 30 and resistors 40, each relay 30 is connected to a resistor 40, all resistors 40 are connected in series and connected to a temperature sampling connector, the controller is connected to the D-type latch 20; the D-type latch 20 is connected to the relays 30.

[0032] In this embodiment, the control unit 10 is the "brain" of the entire system. It is responsible for receiving instructions from a host computer (such as a PC) and generating corresponding control signals based on these instructions. In this design, the control unit 10 is connected to the D-type latch 20 via a communication interface for sending control commands.

[0033] The D-type latch 20 is a key component used for storing and transmitting control signals. Each D-type latch 20 has eight output channels (1Q-8Q) and can determine whether to activate the corresponding relay 30 based on the received control signal. The latch control pin (LE) is used to determine when the latch accepts new data input.

[0034] The relay 30, as an actuator, primarily functions to close or open the circuit based on the output signal of the D-type latch 20. Each relay 30 is connected to a specific resistor 40, and by controlling the state of the relay 30, the required resistor 40 can be selectively connected to the circuit.

[0035] The resistor 40 is the core component for temperature simulation. Different resistor 40 values ​​correspond to different simulated temperature points. All resistor 40s are grouped by order of magnitude and are combined in different ways to meet a wide range of resistor 40 requirements, from 0Ω to 25MΩ.

[0036] All resistors 40 are connected in series to form a resistor 40 chain. This resistor 40 chain is ultimately connected to a temperature sampling connector to simulate the resistance 40 characteristics of a single battery cell under different temperature conditions. The control unit 10 is connected to the D-type latch 20 via a communication bus for issuing control commands. The output channels (1Q-8Q) of each D-type latch 20 are directly connected to a set of relays 30. When the latch outputs a high level, the corresponding relay 30 closes; otherwise, it opens.

[0037] The user sets the desired resistance 40 value to be simulated via a host computer. The control unit 10 generates a corresponding control signal based on the set value and sends it to the D-type latch 20. The D-type latch 20 determines which relays 30 should be closed based on the received control signal, thereby selecting a suitable resistor 40 to be added to the circuit. The selected resistor 40 is connected in series in the circuit to simulate the resistance 40 characteristics under the target temperature conditions.

[0038] This design enables the BMS cell temperature simulation device to not only accurately simulate various temperature conditions but also support multi-point synchronous temperature monitoring, facilitating a comprehensive evaluation of the BMS system's performance and reliability under different environmental conditions. Furthermore, due to its modular design, the system is easy to expand and maintain, and highly adaptable.

[0039] In one embodiment, please refer to Figure 1 and Figure 2 The aforementioned D-type latch 20 includes eight-channel D-type latches 20. This means that each D-type latch 20 has eight output channels (labeled 1Q-8Q). These output channels are used to send control signals to operate the corresponding relays 30. Specifically:

[0040] Each D-type latch 20 has eight independent output ports (1Q to 8Q), which can individually control the corresponding relay 30. The D-type latch 20 also includes a latch control pin (LE), which determines when the output state is updated. When the LE pin receives a valid signal, the latch updates its output state according to the input data (D1-D8).

[0041] In one embodiment, please refer to Figure 1 and Figure 2 There are multiple D-type latches 20 mentioned above, and each D-type latch 20 is connected to multiple relays 30. This indicates that more than one D-type latch 20 is used in the system, and each latch is responsible for a specific number of resistors 40. For example:

[0042] Depending on the range of resistors 40 that need to be controlled, multiple D-type latches 20 may be required. For example, D-type latch 201 controls resistors 40 from 1Ω to 100Ω, while D-type latch 202 controls resistors 40 from 100Ω to 1MΩ, and so on.

[0043] Each D-type latch 20 controls a corresponding number of relays 30 through its eight output channels (1Q-8Q). These relays 30 further control resistors 40 of varying orders of magnitude.

[0044] In one embodiment, please refer to Figure 1 and Figure 2 Each of the aforementioned D-type latches 20 is connected to multiple relays 30, and the resistors 40 are connected in series. This means that all the selected resistors 40 ultimately form a continuous chain of resistors 40, thereby achieving the desired total resistance value 40. The specific structure is as follows:

[0045] When a relay 30 is closed, the resistor 40 connected to it is connected to the circuit. Since all resistors 40 are connected in series, the total resistance 40 of the entire circuit is the sum of the individual resistances 40 connected to the circuit.

[0046] By selectively closing or opening different relays 30, the total resistance 40 value can be adjusted as needed, thereby achieving high-precision resistance 40 simulation.

[0047] In one embodiment, please refer to Figure 1 and Figure 2 Each of the aforementioned D-type latches 20 is connected to eight relays 30. Each D-type latch 20 directly controls the state of the eight relays 30 through its eight output channels. For example:

[0048] Each output channel (1Q-8Q) controls one relay 30, ensuring that each relay 30 can be operated independently.

[0049] This design offers a high degree of flexibility, allowing the system to dynamically adjust the resistor 40 configuration as needed.

[0050] In one embodiment, please refer to Figure 1 and Figure 2The aforementioned multiple relays 30 are connected to resistors 40 of different orders of magnitude. This means that each relay 30 controls a resistor 40 with a different resistance range.

[0051] For example:

[0052] The first relay 30 controls a resistor 40 in the range of 1Ω to 10Ω, while the second relay 30 controls a resistor 40 in the range of 10Ω to 100Ω, and so on.

[0053] In this way, the system can cover a wide range of resistances from low to high, meeting various testing requirements.

[0054] In summary, this design not only improves the accuracy and reliability of temperature simulation, but also enhances the system's flexibility and scalability, making it suitable for a variety of complex BMS testing environments.

[0055] In one embodiment, please refer to Figure 1 and Figure 2 The aforementioned BMS battery cell temperature simulation device also includes an input power supply, which is connected to the control unit 10. This indicates that the entire system requires a stable power supply to ensure its normal operation.

[0056] The input power supply provides the necessary voltage and current to support the operation of the control unit 10 and other components (such as the D-type latch 20, relay 30, etc.).

[0057] Because the BMS battery cell temperature simulation device has high accuracy requirements, the input power supply usually needs to have high stability and low noise characteristics to avoid interfering with the measurement results.

[0058] In one embodiment, please refer to Figure 1 and Figure 2 The aforementioned D-type latch 20 is connected to an input power supply. This means that the D-type latch 20 also requires an external power supply to ensure its operation.

[0059] The D-type latch 20 obtains the necessary electrical energy from the input power supply to drive the internal circuitry and output ports.

[0060] By directly connecting to the input power supply, the D-type latch 20 can operate more independently of other components, improving the modularity and reliability of the system.

[0061] In one embodiment, please refer to Figure 2 The aforementioned control unit 10 includes a controller U79. The controller U79 is one of the core components of the entire system, responsible for receiving data from the host computer or sensors and generating corresponding control signals based on this data.

[0062] The controller U79 can be a microprocessor or an application-specific integrated circuit (ASIC) that performs complex computational tasks, such as parsing received data and determining how to adjust the value of resistor 40.

[0063] Based on the calculation results, the controller U79 will send a specific control signal to the D-type latch 20 to realize the operation of the relay 30.

[0064] In one embodiment, please refer to Figure 1 and Figure 2 The aforementioned input power supply is connected to the D-type latch 20 through the current-limiting resistor 40.

[0065] This design is primarily intended to protect the D-type latch 20 from excessive current surges.

[0066] The current-limiting resistor 40 limits the maximum current flowing into the D-type latch 20, preventing damage to the device due to a large instantaneous current.

[0067] Using a current-limiting resistor of 40 increases system safety, especially during startup or in case of abnormal conditions, effectively reducing the possibility of failure.

[0068] In practical applications, the selection of the current-limiting resistor 40 needs to consider several factors, such as the expected maximum operating current, the required voltage drop, and the power dissipation capability, to ensure that it does not affect normal operation and provides sufficient protection.

[0069] In summary, this BMS battery cell temperature simulation device not only focuses on the implementation of basic functions but also emphasizes system reliability and safety. Through a reasonable power management strategy, precise control mechanisms, and effective protection measures, the device can operate stably in complex and variable real-world environments, providing a reliable testing method for battery management systems.

[0070] Please see Figure 2 The J297 is a 40-pin connector that serves as the system's input interface. It receives control signals and power from a host computer (such as a PC).

[0071] Pins 1 to 38: Used for transmitting data and control signals.

[0072] Pins 39 and 40: Ground (GND), providing a reference level.

[0073] U79 is responsible for processing input signals and generating corresponding control commands.

[0074] Each latch has 8 output channels (1Q-8Q) for controlling the corresponding relay 30.

[0075] Each D-type latch 20 controls a group of relays 30, and each relay 30 corresponds to a resistor 40 of a specific order of magnitude.

[0076] Specific connections: Relays U73, U75, U77, and U81 are controlled by the output channel of the first D-type latch 20; relays U83, U85, U87, U89, U91, U93, U95, and U99 are controlled by the output channel of the second D-type latch 20; and so on, until all relays 30 are controlled by their respective D-type latches 20.

[0077] The resistors 40 are grouped by order of magnitude, such as 1Ω to 10Ω, 10Ω to 100Ω, etc., to achieve a wide range of resistor 40 outputs from 0Ω to 25MΩ. All selected resistors 40 ultimately form a continuous resistor 40 chain, thereby achieving the desired total resistor 40 value.

[0078] The system receives a 5V input power supply through the VCC pin of the J297 connector, providing the necessary power for the entire circuit. The host computer sends control signals through the J297 connector, including setting the required resistance 40 value and other control commands. After receiving these signals, the controller U79 analyzes and calculates them, and generates corresponding control commands based on the results. The controller U79 sends the control commands to each D-type latch 20, and the latch controls the corresponding relay 30 to close or open through its output channel (1Q-8Q). The closed state of the relay 30 determines which resistors 40 are connected to the circuit, thereby achieving accurate simulation of the target resistance 40 value.

[0079] Each D-type latch 20 contains 8 output channels (1Q-8Q) for controlling a corresponding number of relays 30. Depending on the number of resistors 40 to be controlled, multiple D-type latches 20 may be used, each independently controlling a group of relays 30. The relays 30 connected to each D-type latch 20 are further connected to resistors 40 of different orders of magnitude, and all resistors 40 are eventually connected in series to form a continuous resistor chain. The input power supply is connected to the D-type latch 20 through a current-limiting resistor 40 to protect the device from excessive current surges.

[0080] This design not only improves the accuracy and reliability of temperature simulation, but also enhances the system's flexibility and scalability, making it suitable for a variety of complex BMS testing environments.

[0081] In this embodiment, a BMS cell temperature simulation device meets the requirement for high-precision and wide-range cell temperature simulation in BMS testing. This device can provide accurate resistance 40°C output to simulate battery performance under different temperature conditions.

[0082] Its functionality is achieved using basic electronic components. Specifically, the entire system is powered by a 5V input.

[0083] After the system is powered on, the user can set the desired resistance value via a host computer (such as a PC). The control unit 10 receives these instructions and converts them into control signals (D1-D8) to operate the eight output channels (1Q-8Q) of the D-type latch 20.

[0084] Each D-type latch 20's output channel (1Q-8Q) and latch control pin (LE) are responsible for controlling the corresponding relay 30 to close or open, thereby selecting an appropriate resistor 40 value for output.

[0085] Each D-type latch 20 can control a resistor 40 on the order of two orders of magnitude;

[0086] D-type latch 201 controls the range of 1Ω to 10Ω and 10Ω to 100Ω;

[0087] D-type latch 202 controls the order of 100Ω to 1KΩ and 1KΩ to 10KΩ;

[0088] D-type latch 203 controls the order of magnitude from 10KΩ to 100KΩ and from 100KΩ to 1MΩ;

[0089] The D-type latch 204 controls the range from 1MΩ to 10MΩ.

[0090] To achieve the desired resistance value, specific combinations of resistors (40Ω) are used. For example, for single-digit resistors (40Ω), four resistors (40Ω, 1Ω, 2Ω, 4Ω, and 8Ω) are grouped together. Different combinations can achieve any resistance value between 1Ω and 10Ω. Similarly, for tens-digit resistors (40Ω), four groups of resistors (40Ω, 10Ω, 20Ω, 40Ω, and 80Ω) are used. This process continues, allowing for a maximum output resistance from 1Ω to Rmax, ensuring a wide output range from 0Ω to 25MΩ.

[0091] The main advantage of the device in this embodiment is its ability to effectively and accurately simulate target temperature values ​​while supporting simultaneous multi-point temperature monitoring. This makes it possible to verify the performance and reliability of the BMS under different temperature conditions, greatly improving the accuracy and efficiency of testing.

[0092] The aforementioned BMS battery cell temperature simulation device integrates a control unit 10, a D-type latch 20, multiple relays 30, and resistors 40. Each relay 30 is connected to a specific resistor 40 value, and all resistors 40 are connected in series to a temperature sampling connector. The controller sends commands to the D-type latch 20 to precisely control the closing or opening of the relays 30 to select a suitable combination of resistors 40. This design not only fills the gap in existing technology for high-precision and wide-range battery cell temperature simulation but also greatly improves the accuracy and applicability of temperature simulation. Its flexibility and accuracy are crucial for improving the reliability and safety of the BMS system under different operating conditions, thereby ensuring that the battery management system can operate stably in various environments, effectively extending battery life and improving the overall performance of the system.

[0093] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A BMS battery cell temperature simulation device, characterized in that, include: The system includes a control unit, a D-type latch, multiple relays, and resistors. Each relay is connected to a resistor, and all the resistors are connected in series to the BMS battery. The control unit is connected to the D-type latch, and the D-type latch is connected to the relays.

2. The BMS battery cell temperature simulation device of claim 1, wherein, The D-type latch includes an eight-way D-type latch.

3. The BMS battery cell temperature simulation device of claim 2, wherein, There are multiple D-type latches, and each D-type latch is connected to multiple relays.

4. The BMS battery cell temperature simulation device of claim 3, wherein, The resistors connected to the multiple relays connected to each of the D-type latches are connected in series.

5. The BMS battery cell temperature simulation device of claim 4, wherein, Each of the D-type latches is connected to eight of the relays.

6. The BMS battery cell temperature simulation device of claim 5, wherein, The multiple relays are respectively connected to resistors of different orders of magnitude.

7. The BMS battery cell temperature simulation device of claim 1, wherein, It also includes an input power supply, which is connected to the control unit.

8. The BMS battery cell temperature simulation device of claim 7, wherein, The D-type latch is connected to the input power supply.

9. The BMS battery cell temperature simulation apparatus of claim 1, wherein, The control unit includes controller U79.

10. The BMS battery cell temperature simulation apparatus of claim 8, wherein, The input power supply is connected to the D-type latch through a current-limiting resistor.

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