Battery parameter acquisition device based on redundancy mechanism and electronic equipment

Abstract

The utility model discloses a battery parameter acquisition device based on a redundancy mechanism and electronic equipment, the device comprises a main acquisition circuit, a redundancy acquisition circuit and a parameter sending circuit, the main acquisition circuit is used for acquiring first battery parameters corresponding to all battery packs in a battery test circuit, and the redundancy acquisition circuit is used for sending the first battery parameters to the redundancy acquisition circuit; the data is sent to the redundancy acquisition circuit and the parameter sending circuit; the redundancy acquisition circuit is used for acquiring second battery parameters of all battery packs in the battery test circuit and performing fault monitoring operation on the main acquisition circuit by combining the first battery parameters so as to transmit a fault monitoring result of the main acquisition circuit to the parameter sending circuit; the parameter sending circuit is used for sending the corresponding battery parameters to the test control circuit according to the fault monitoring result, so that the battery parameters of the battery pack are acquired twice, the fault condition of the main acquisition circuit can be found in time, and the second battery parameters can be used as standby data; and the acquisition reliability and accuracy of the battery parameters are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery parameter collection, in particular to a battery parameter collection device and electronic equipment based on a redundancy mechanism. Background Art

[0002] Battery Management System (BMS) plays a vital role in electric vehicles, energy storage systems, etc. In order to ensure the safe and efficient operation of the battery, BMS needs to collect various parameters of the battery in real time and accurately.

[0003] At present, in conventional BMS, battery parameters (such as battery voltage parameters, battery temperature parameters, etc.) are generally collected one by one, and each battery parameter is collected only once. However, once the parameter collection circuit of the BMS fails, it will affect the BMS's accurate collection of battery parameters, thereby affecting the subsequent accurate analysis of battery parameters. It can be seen that it is particularly important to provide a technical solution that can improve the reliability of battery parameter collection. Utility Model Content

[0004] In view of this, the problem to be solved by the utility model is to provide a battery parameter acquisition device based on a redundancy mechanism, which can not only detect the fault of the main acquisition circuit in time, but also use the second battery parameter as backup data, thereby improving the reliability and accuracy of the battery parameter acquisition.

[0005] In order to solve the above technical problems, the first aspect of the utility model discloses a battery parameter acquisition device based on a redundancy mechanism, wherein the battery parameter acquisition device includes a main acquisition circuit, a redundant acquisition circuit and a parameter sending circuit, wherein:

[0006] The acquisition end of the main acquisition circuit is used to electrically connect to the sending end of the battery test circuit, and the test end of the battery test circuit is used to electrically connect to multiple battery packs with test requirements, the sending end of the main acquisition circuit is electrically connected to the first receiving end of the parameter sending circuit, and the sending end of the parameter sending circuit is used to electrically connect to the test control circuit;

[0007] The acquisition end of the redundant acquisition circuit is used to be electrically connected to the sending end of the battery test circuit, the monitoring end of the redundant acquisition circuit is electrically connected to the sending end of the main acquisition circuit, and the feedback end of the redundant acquisition circuit is electrically connected to the second receiving end of the parameter sending circuit;

[0008] The main acquisition circuit is used to perform a battery parameter acquisition operation on all the battery packs in the battery testing circuit to obtain first battery parameters corresponding to all the battery packs, and send the first battery parameters to the redundant acquisition circuit and the parameter sending circuit;

[0009] The redundant acquisition circuit is used to perform a battery parameter acquisition operation on all the battery packs in the battery testing circuit to obtain second battery parameters corresponding to all the battery packs, and perform a fault monitoring operation on the main acquisition circuit according to the second battery parameters and the received first battery parameters to obtain a fault monitoring result of the main acquisition circuit; and transmit the fault monitoring result to the parameter sending circuit;

[0010] The parameter sending circuit is used to send the received first battery parameter to the test control circuit when the received fault monitoring result indicates that the main acquisition circuit does not have an acquisition fault.

[0011] As an optional implementation manner, in the first aspect of the utility model, the parameter sending circuit is further used for:

[0012] When the received fault monitoring result indicates that the main acquisition circuit has the acquisition fault, at least one first target battery group with acquisition abnormality and a second target battery group without the acquisition abnormality are determined from all the battery groups according to the fault monitoring result;

[0013] According to all the first target battery groups, obtaining first target battery parameters corresponding to all the first target battery groups from the second battery parameters collected by the redundant acquisition circuit, and according to the second target battery group, determining second target battery parameters corresponding to the second target battery group from the first battery parameters;

[0014] The first target battery parameter and the second target battery parameter are sent to the test control circuit.

[0015] As an optional implementation, in the first aspect of the utility model, the redundant acquisition circuit includes a redundant acquisition module and a parameter comparison module, wherein:

[0016] The acquisition end of the redundant acquisition module is used to electrically connect to the sending end of the battery test circuit, and the communication end of the redundant acquisition module is electrically connected to the receiving end of the parameter comparison module;

[0017] The monitoring end of the parameter comparison module is electrically connected to the sending end of the main acquisition circuit, and the feedback end of the parameter comparison module is electrically connected to the second receiving end of the parameter sending circuit;

[0018] The redundant acquisition module is used to perform a battery parameter acquisition operation on all the battery packs in the battery test circuit to obtain second battery parameters corresponding to all the battery packs, and transmit the second battery parameters to the parameter comparison module;

[0019] The parameter comparison module is used to determine the degree of parameter difference between the received second battery parameter and the first battery parameter, and determine the fault monitoring result of the main acquisition circuit according to the degree of parameter difference, so as to transmit the fault monitoring result to the parameter sending circuit.

[0020] As an optional implementation, in the first aspect of the utility model, the main acquisition circuit includes a main acquisition module and a communication module, wherein:

[0021] The acquisition end of the main acquisition module is used to electrically connect to the sending end of the battery test circuit, and the communication end of the main acquisition module is electrically connected to the receiving end of the communication module and the monitoring end of the parameter comparison module;

[0022] The transmitting end of the communication module is electrically connected to the first receiving end of the parameter sending circuit.

[0023] As an optional implementation, in the first aspect of the utility model, the redundant acquisition module includes a redundant acquisition component and a first communication component, wherein:

[0024] The collection end of the redundant collection component is used to electrically connect to the sending end of the battery test circuit, and the sending end of the redundant collection component is electrically connected to the receiving end of the first communication component;

[0025] The communication end of the first communication component is electrically connected to the receiving end of the parameter comparison module.

[0026] As an optional implementation, in the first aspect of the utility model, the parameter comparison module includes a parameter comparison component and a monitoring component, wherein:

[0027] The enabling end of the parameter comparison component is electrically connected to the controlled end of the monitoring component;

[0028] The monitoring end of the monitoring component is electrically connected to the communication end of the main acquisition module, and the sending end of the monitoring component is electrically connected to the third receiving end of the parameter comparison component;

[0029] The fourth receiving end of the parameter comparison component is electrically connected to the communication end of the first communication component, and the feedback end of the parameter comparison component is electrically connected to the second receiving end of the parameter sending circuit.

[0030] As an optional implementation, in the first aspect of the utility model, the monitoring component includes a monitoring chip, a diode and a voltage regulator tube, wherein:

[0031] The controlled end of the monitoring chip is electrically connected to the enabling end of the parameter comparison component, the monitoring end of the monitoring chip is electrically connected to the communication end of the main acquisition module, and the transmitting end of the monitoring chip is electrically connected to the third receiving end of the parameter comparison component;

[0032] The grounding terminal of the monitoring chip is electrically connected to the negative electrode of the voltage regulator tube and is used for grounding, the positive electrode of the voltage regulator tube is electrically connected to the positive electrode of the diode, and the negative electrode of the diode is electrically connected to the controlled terminal of the monitoring chip.

[0033] As an optional implementation, in the first aspect of the utility model, the main acquisition circuit further includes an equalization module, wherein:

[0034] The equalizing end of the equalizing module is used to electrically connect to the transmitting end of the battery testing circuit, and the transmitting end of the equalizing module is electrically connected to the collecting end of the main collecting module.

[0035] As an optional implementation, in the first aspect of the utility model, the communication module includes a second communication component, a current limiting device and a filter device, wherein:

[0036] The receiving end of the second communication component is electrically connected to one end of the current limiting device and the other end of the current limiting device is electrically connected to the communication end of the main acquisition module, and the sending end of the second communication component is electrically connected to the first receiving end of the parameter sending circuit;

[0037] One end of the filter device is electrically connected to the receiving end of the second communication component and the other end of the filter device is grounded.

[0038] The second aspect of the utility model discloses an electronic device, which comprises a battery parameter acquisition device based on a redundancy mechanism as disclosed in any one of the first aspects.

[0039] The implementation of this utility model has the following beneficial effects:

[0040] The utility model provides a battery parameter acquisition device based on a redundancy mechanism, the device comprises: a main acquisition circuit, a redundant acquisition circuit and a parameter sending circuit, the main acquisition circuit is used for acquiring first battery parameters corresponding to all battery groups in a battery test circuit, and sending the first battery parameters to the redundant acquisition circuit and the parameter sending circuit; the redundant acquisition circuit is used for acquiring second battery parameters of all battery groups in the battery test circuit, and in combination with the first battery parameters, performing a fault monitoring operation on the main acquisition circuit, so as to transmit the fault monitoring result of the main acquisition circuit to the parameter sending circuit; the parameter sending circuit is used for sending the corresponding battery parameters to the test control circuit according to the fault monitoring result, so that by acquiring the battery parameters of the battery group for the second time, not only the fault of the main acquisition circuit can be discovered in time, but also the second battery parameters can be used as backup data, thereby improving the reliability and accuracy of the acquisition of the battery parameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 It is a structural schematic diagram of a battery parameter acquisition device based on a redundancy mechanism disclosed in an embodiment of the utility model;

[0043] Figure 2 It is a structural schematic diagram of a main acquisition module disclosed in an embodiment of the utility model;

[0044] Figure 3 It is a structural schematic diagram of a communication module disclosed in an embodiment of the utility model;

[0045] Figure 4 It is a structural schematic diagram of a balancing module disclosed in an embodiment of the utility model;

[0046] Figure 5 It is a structural schematic diagram of a monitoring component disclosed in an embodiment of the utility model;

[0047] Figure 6 It is a schematic diagram of a battery parameter collection framework based on a redundancy mechanism disclosed in an embodiment of the utility model;

[0048] Figure 7 It is a structural schematic diagram of an electronic device disclosed in an embodiment of the utility model. DETAILED DESCRIPTION

[0049] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the utility model and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0051] Embodiment 1

[0052] See also Figure 1 , Figure 1 This is a schematic diagram of the structure of a battery parameter acquisition device based on a redundant mechanism disclosed in an embodiment of the utility model. The device can collect battery parameters for various types of battery systems, such as ternary lithium battery systems, lithium iron phosphate battery systems, lithium iron manganese phosphate battery systems, lithium cobalt oxide battery systems, solid-state battery systems, etc., which are not limited in the embodiment of the utility model. Figure 1 As shown, the battery parameter acquisition device based on the redundancy mechanism includes a main acquisition circuit 101, a redundant acquisition circuit 102 and a parameter sending circuit 103, wherein:

[0053] The acquisition end of the main acquisition circuit 101 is used to electrically connect to the sending end of the battery test circuit 104, and the test end of the battery test circuit 104 is used to electrically connect to multiple battery packs with test requirements. The sending end of the main acquisition circuit 101 is electrically connected to the first receiving end of the parameter sending circuit 103, and the sending end of the parameter sending circuit 103 is used to electrically connect to the test control circuit 107;

[0054] The collection end of the redundant collection circuit 102 is used to electrically connect to the sending end of the battery test circuit 104, the monitoring end of the redundant collection circuit 102 is electrically connected to the sending end of the main collection circuit 101, and the feedback end of the redundant collection circuit 102 is electrically connected to the second receiving end of the parameter sending circuit 103;

[0055] The main acquisition circuit 101 is used to perform battery parameter acquisition operations on all battery packs in the battery testing circuit 104, obtain first battery parameters corresponding to all battery packs, and send the first battery parameters to the redundant acquisition circuit 102 and the parameter sending circuit 103;

[0056] The redundant acquisition circuit 102 is used to perform a battery parameter acquisition operation on all battery packs in the battery testing circuit 104 to obtain second battery parameters corresponding to all battery packs, and perform a fault monitoring operation on the main acquisition circuit 101 according to the second battery parameters and the received first battery parameters to obtain a fault monitoring result of the main acquisition circuit 101; and transmit the fault monitoring result to the parameter sending circuit 103;

[0057] The parameter sending circuit 103 is used to send the received first battery parameter to the test control circuit 107 when the received fault monitoring result indicates that the main acquisition circuit 101 does not have an acquisition fault.

[0058] In this optional embodiment, optionally, the first battery parameters corresponding to all battery groups 1 to n may include the first electrical parameter, the first temperature parameter, the first line sequence parameter, etc. corresponding to each battery group collected by the main acquisition circuit, and the second battery parameters corresponding to all battery groups 1 to n may include the second electrical parameter, the second temperature parameter, the second line sequence parameter, etc. corresponding to each battery group collected by the redundant acquisition circuit (this is the standard battery parameter corresponding to all battery groups 1 to n). Further optionally, the acquisition failure may include at least one of an electrical parameter acquisition failure, a line sequence parameter acquisition failure, and a line sequence parameter acquisition failure.

[0059] In this optional embodiment, further, the parameter sending circuit 103 is further configured to:

[0060] When the received fault monitoring result indicates that the main acquisition circuit 101 has an acquisition fault, at least one first target battery group with acquisition abnormality and a second target battery group without acquisition abnormality are determined from all battery groups according to the fault monitoring result;

[0061] According to all the first target battery groups, first target battery parameters corresponding to all the first target battery groups are obtained from the second battery parameters collected by the redundant acquisition circuit 102, and according to the second target battery group, second target battery parameters corresponding to the second target battery group are determined from the first battery parameters;

[0062] The first target battery parameter and the second target battery parameter are sent to the test control circuit 107 .

[0063] In this optional embodiment, when all battery groups have acquisition anomalies, the result of the second target battery group determined is empty. For example, when the first electrical parameters corresponding to battery groups 1 to 3 acquired by the main acquisition circuit 101 and the second electrical parameters corresponding to battery groups 1 to 3 acquired by the redundant acquisition circuit 102 have a large parameter difference, and the first electrical parameters corresponding to the remaining battery groups have a small difference from the second electrical parameters, it can be determined that the acquisition channel of the main acquisition circuit 101 for battery groups 1 to 3 has an abnormality. At this time, the parameter sending circuit 103 can obtain the second electrical parameters corresponding to battery groups 1 to 3 from the redundant acquisition circuit 102 as the parameters that need to be sent to the test control circuit 107, and the first electrical parameters corresponding to the remaining battery groups received from the main acquisition circuit 101 are used as the parameters that need to be sent to the test control circuit 107.

[0064] Optionally, when the test control circuit 107 receives the corresponding battery parameters, the corresponding battery parameters may be automatically stored, or the next step of battery parameter analysis operation may be performed.

[0065] It can be seen that implementation Figure 1 The described battery parameter acquisition device based on a redundancy mechanism can respectively acquire the battery parameters of a battery pack through a main acquisition circuit and a redundant acquisition circuit, and perform fault monitoring on the main acquisition circuit through the redundant acquisition circuit. Thus, by acquiring the battery parameters of the battery pack for a second time, not only can the fault of the main acquisition circuit be discovered in time, but the second battery parameters can also be used as backup data, thereby improving the reliability and accuracy of the acquisition of the battery parameters, and thus improving the accuracy of subsequent analysis of the battery parameters.

[0066] In an optional embodiment, the redundant acquisition circuit 102 includes a redundant acquisition module and a parameter comparison module, wherein:

[0067] The collection end of the redundant collection module is used to electrically connect to the sending end of the battery test circuit 104, and the communication end of the redundant collection module is electrically connected to the receiving end of the parameter comparison module;

[0068] The monitoring end of the parameter comparison module is electrically connected to the sending end of the main acquisition circuit 101, and the feedback end of the parameter comparison module is electrically connected to the second receiving end of the parameter sending circuit 103;

[0069] A redundant acquisition module, used for performing a battery parameter acquisition operation on all battery packs in the battery test circuit 104, obtaining second battery parameters corresponding to all battery packs, and transmitting the second battery parameters to the parameter comparison module;

[0070] The parameter comparison module is used to determine the parameter difference between the received second battery parameter and the first battery parameter, and determine the fault monitoring result of the main acquisition circuit 101 according to the parameter difference, so as to transmit the fault monitoring result to the parameter sending circuit 103.

[0071] In this optional embodiment, optionally, when the parameter difference degree is greater than or equal to a preset difference degree threshold, it can be determined that the fault monitoring result is that the main acquisition circuit 101 has an acquisition fault; when the parameter difference degree is less than the preset difference degree threshold, it can be determined that the fault monitoring result is that the main acquisition circuit 101 does not have an acquisition fault.

[0072] Further, the redundant acquisition module includes a redundant acquisition component and a first communication component, wherein:

[0073] The collection end of the redundant collection component is used to electrically connect to the sending end of the battery test circuit 104, and the sending end of the redundant collection component is electrically connected to the receiving end of the first communication component;

[0074] The communication end of the first communication component is electrically connected to the receiving end of the parameter comparison module.

[0075] Optionally, the redundant acquisition module further includes a balancing component, wherein:

[0076] The equalizing end of the equalizing component is used to electrically connect to the transmitting end of the battery testing circuit 104 , and the transmitting end of the equalizing component is electrically connected to the collecting end of the redundant collecting component.

[0077] It can be seen that this optional embodiment can perform secondary acquisition of the corresponding battery parameters of the battery pack through the redundant acquisition module and the parameter comparison module, and perform real-time fault monitoring of the main acquisition circuit. In this way, the acquisition failure of the main acquisition circuit can be discovered in time, and the accuracy of the corresponding battery parameters received by the test control circuit can be ensured.

[0078] In another optional embodiment, the main acquisition circuit 101 includes a main acquisition module and a communication module, such as Figure 2 and Figure 3 As shown, where:

[0079] The acquisition terminals C_01_1 to C_01_12 / S_01_1 to S_01_12 of the main acquisition module are used to electrically connect to the transmitting terminal of the battery test circuit 104, and the communication terminal IPB / IMA of the main acquisition module is electrically connected to the receiving terminal CPU_AFE_SDO of the communication module and the monitoring terminal of the parameter comparison module;

[0080] The sending end IP / IM of the communication module is electrically connected to the first receiving end of the parameter sending circuit 103 .

[0081] In this optional embodiment, the aforementioned redundant acquisition component may also refer to Figure 2 The structure shown in FIG. 1 is constructed, and the first communication component mentioned above can also refer to Figure 3 Build the structure shown.

[0082] Optionally, the main acquisition circuit 101 may further include an equalization module, such as Figure 4 As shown, where:

[0083] The equalizing terminals BAT01_01 to BAT12_01 of the equalizing module are used to electrically connect to the transmitting terminal of the battery testing circuit 104 , and the transmitting terminal of the equalizing module is electrically connected to the collecting terminals C_01_1 to C_01_12 / S_01_1 to S_01_12 of the main collecting module.

[0084] in, Figure 4 The dotted box part in the figure is a complete equalization module. When the main acquisition module has multiple acquisition terminals, each acquisition terminal corresponds to an equalization module (the aforementioned equalization components can also be referred to as Figure 4 Build the structure shown).

[0085] In this optional embodiment, if Figure 3 As shown, the communication module includes a second communication component, a current limiting device and a filter device, wherein:

[0086] The receiving end CPU_AFE_SDO of the second communication component is electrically connected to one end of the current limiting device and the other end of the current limiting device is electrically connected to the communication end IPB / IMA of the main acquisition module, and the sending end IP / IM of the second communication component is electrically connected to the first receiving end of the parameter sending circuit 103;

[0087] One end of the filter device is electrically connected to the receiving end CPU_AFE_SDO of the second communication component and the other end of the filter device is grounded.

[0088] Optionally, the current limiting device may include a single current limiting resistor, or multiple current limiting resistors connected in series, or multiple current limiting resistors connected in parallel. Further optionally, the filter device may include a filter capacitor, or other devices that can perform the same filtering function.

[0089] It can be seen that this optional embodiment can improve the construction reliability of the main acquisition circuit by flexibly replacing the corresponding components. This is conducive to improving the data transmission stability and security of the main acquisition circuit, so that the battery parameter acquisition device can successfully acquire accurate corresponding battery parameters.

[0090] In yet another optional embodiment, the parameter comparison module includes a parameter comparison component and a monitoring component, wherein:

[0091] The enabling end of the parameter comparison component is electrically connected to the controlled end of the monitoring component;

[0092] The monitoring end of the monitoring component is electrically connected to the communication end IPB / IMA of the main acquisition module, and the sending end of the monitoring component is electrically connected to the third receiving end of the parameter comparison component;

[0093] The fourth receiving end of the parameter comparison component is electrically connected to the communication end of the first communication component, and the feedback end of the parameter comparison component is electrically connected to the second receiving end of the parameter sending circuit 103 .

[0094] In this optional implementation, if Figure 5 As shown, the monitoring component includes a monitoring chip, a diode and a voltage regulator tube, wherein:

[0095] The controlled terminal AFE1_CL of the monitoring chip is electrically connected to the enable terminal of the parameter comparison component, the monitoring terminal VREF_01 of the monitoring chip is electrically connected to the communication terminal IPB / IMA of the main acquisition module, and the transmitting terminal AFE1_REF of the monitoring chip is electrically connected to the third receiving terminal of the parameter comparison component;

[0096] The ground terminal AFE_GND of the monitoring chip is electrically connected to the cathode of the voltage regulator tube and is used for grounding, the anode of the voltage regulator tube is electrically connected to the anode of the diode, and the cathode of the diode is electrically connected to the controlled terminal AFE1_CL of the monitoring chip.

[0097] Optionally, the diode in the monitoring component can be replaced by other devices that can play the same current control role, and the voltage regulator tube can also be replaced by other devices that can play the same voltage stabilization role.

[0098] It can be seen that this optional embodiment can select appropriate components according to the actual conditions of each component, which not only enables the monitoring component to perform reliable fault monitoring operations on the main acquisition circuit to efficiently transmit the first battery parameter corresponding to the battery pack to the parameter comparison component and the test control circuit, but also can reduce the occurrence of damage or burning of each component during operation, thereby improving the protection of the circuit.

[0099] In summary, if Figure 6 As shown, taking ADI6815 as the main acquisition module (each main acquisition module can acquire the first battery parameter of a battery pack), TI79616 as the redundant acquisition module (each redundant acquisition module can acquire the second battery parameter of a battery pack), the microcontroller as the parameter sending circuit, and the connector as the corresponding battery test circuit configured with the battery pack to be tested, the working principle of a battery parameter acquisition device based on the redundant mechanism in the embodiment of the utility model is as follows:

[0100] When each main acquisition module acquires the first electrical / temperature / line sequence parameters of the corresponding battery group, each redundant acquisition module also acquires the second electrical / temperature / line sequence parameters of the corresponding battery group at the same time, and then all the main acquisition modules acquire the first battery parameters corresponding to all battery groups (i.e., the first electrical / temperature / line sequence parameters of each battery group) through Figure 6 The daisy chain chip below (i.e., the communication module) transmits to the microcontroller, and transmits to the FPGA (i.e., the parameter comparison component) through the external monitoring component.

[0101] At the same time, all redundant acquisition modules collect the second battery parameters corresponding to all battery packs (i.e., the second electrical / temperature / line sequence parameters of each battery pack) through Figure 6 The upper daisy chain chip (ie, the first communication component) transmits the information to the FPGA, so that the FPGA can compare the first battery parameter and the second battery parameter.

[0102] When the FPGA finds that the difference between the two parameters is small, the FPGA can send the fault monitoring result indicating that each main acquisition module does not have an acquisition fault to the microcontroller through the serial port, so that the microcontroller directly sends the obtained first battery parameters corresponding to all battery packs to the external test control circuit;

[0103] When the FPGA finds that the difference between the two parameters is large, the FPGA determines that at least one first target battery group has an acquisition abnormality (that is, the main acquisition module corresponding to the first target battery group has an abnormality), and determines the first target battery parameters corresponding to all first target battery groups from the second battery parameters (that is, the standard battery parameters corresponding to all first target battery groups acquired by the corresponding redundant acquisition module), and determines the second target battery parameters corresponding to all second target battery groups without acquisition abnormalities from the first battery parameters (that is, the normal battery parameters corresponding to all second target battery groups acquired by the corresponding main acquisition module), so as to send the first target battery parameters and the second target battery parameters to the external test control circuit; at the same time, the corresponding hard-line alarm circuit can also alarm the main acquisition module with acquisition abnormalities.

[0104] Embodiment 2

[0105] See also Figure 7 , Figure 7It is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the utility model, and the electronic device includes any battery parameter acquisition device based on a redundant mechanism as in Embodiment 1, and the electronic device can collect battery parameters for various types of battery systems, such as ternary lithium battery systems, lithium iron phosphate battery systems, lithium iron manganese phosphate battery systems, lithium cobalt oxide battery systems, solid-state battery systems, etc., which are not limited in the embodiments of the utility model. It should be noted that for a detailed description of a battery parameter acquisition device based on a redundant mechanism, please refer to the specific description of the relevant content in Embodiment 1, which will not be repeated in this embodiment.

[0106] It can be seen that the implementation Figure 7 The electronic device described is capable of performing secondary collection and comparison of the battery parameters of each battery pack, which can not only promptly detect abnormalities in the collection of the battery parameters of the battery pack, but also use the collected second battery parameters, i.e., standard battery parameters, as backup data, thereby improving the reliability and accuracy of the collection of the battery parameters of the battery pack, thereby improving the accuracy of subsequent analysis of the battery parameters.

[0107] A battery parameter acquisition device and an electronic device based on a redundant mechanism disclosed in an embodiment of the utility model are introduced in detail above. The principle and implementation mode of the utility model are explained in this article by using a specific embodiment. However, the above preferred embodiment is not used to limit the utility model. The description of the above embodiment is only used to help understand the method of the utility model and its core idea. At the same time, for a person skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and the scope of application without departing from the spirit and scope of the utility model. Therefore, the scope of protection of the utility model is defined by the claims.

Claims

1. A battery parameter acquisition device based on a redundancy mechanism, characterized in that: The battery parameter acquisition device includes a main acquisition circuit, a redundant acquisition circuit and a parameter sending circuit, wherein: The acquisition end of the main acquisition circuit is used to electrically connect to the sending end of the battery test circuit, and the test end of the battery test circuit is used to electrically connect to multiple battery packs with test requirements, the sending end of the main acquisition circuit is electrically connected to the first receiving end of the parameter sending circuit, and the sending end of the parameter sending circuit is used to electrically connect to the test control circuit; The acquisition end of the redundant acquisition circuit is used to be electrically connected to the sending end of the battery test circuit, the monitoring end of the redundant acquisition circuit is electrically connected to the sending end of the main acquisition circuit, and the feedback end of the redundant acquisition circuit is electrically connected to the second receiving end of the parameter sending circuit; The main acquisition circuit is used to perform a battery parameter acquisition operation on all the battery packs in the battery testing circuit to obtain first battery parameters corresponding to all the battery packs, and send the first battery parameters to the redundant acquisition circuit and the parameter sending circuit; The redundant acquisition circuit is used to perform a battery parameter acquisition operation on all the battery packs in the battery testing circuit to obtain second battery parameters corresponding to all the battery packs, and perform a fault monitoring operation on the main acquisition circuit according to the second battery parameters and the received first battery parameters to obtain a fault monitoring result of the main acquisition circuit; and transmit the fault monitoring result to the parameter sending circuit; The parameter sending circuit is used for sending the received first battery parameter to the test control circuit when the received fault monitoring result indicates that the main acquisition circuit does not have the acquisition fault; when the received fault monitoring result indicates that the main acquisition circuit has the acquisition fault, determining at least one first target battery group with acquisition abnormality and a second target battery group without the acquisition abnormality from all the battery groups according to the fault monitoring result; obtaining first target battery parameters corresponding to all the first target battery groups from the second battery parameters collected by the redundant acquisition circuit according to all the first target battery groups, and determining second target battery parameters corresponding to the second target battery group from the first battery parameters according to the second target battery group; and sending the first target battery parameter and the second target battery parameter to the test control circuit; Furthermore, the redundant acquisition circuit includes a redundant acquisition module and a parameter comparison module, wherein: The acquisition end of the redundant acquisition module is used to electrically connect to the sending end of the battery test circuit, and the communication end of the redundant acquisition module is electrically connected to the receiving end of the parameter comparison module; The monitoring end of the parameter comparison module is electrically connected to the sending end of the main acquisition circuit, and the feedback end of the parameter comparison module is electrically connected to the second receiving end of the parameter sending circuit; The redundant acquisition module is used to perform a battery parameter acquisition operation on all the battery packs in the battery test circuit to obtain second battery parameters corresponding to all the battery packs, and transmit the second battery parameters to the parameter comparison module; The parameter comparison module is used to determine the degree of parameter difference between the received second battery parameter and the first battery parameter, and determine the fault monitoring result of the main acquisition circuit according to the degree of parameter difference, so as to transmit the fault monitoring result to the parameter sending circuit; And, the main acquisition circuit includes a main acquisition module and a communication module, wherein: The acquisition end of the main acquisition module is used to electrically connect to the sending end of the battery test circuit, and the communication end of the main acquisition module is electrically connected to the receiving end of the communication module and the monitoring end of the parameter comparison module; The transmitting end of the communication module is electrically connected to the first receiving end of the parameter sending circuit.

2. A battery parameter acquisition device based on a redundancy mechanism according to claim 1, characterized in that: The redundant acquisition module includes a redundant acquisition component and a first communication component, wherein: The collection end of the redundant collection component is used to electrically connect to the sending end of the battery test circuit, and the sending end of the redundant collection component is electrically connected to the receiving end of the first communication component; The communication end of the first communication component is electrically connected to the receiving end of the parameter comparison module.

3. A battery parameter acquisition device based on a redundancy mechanism according to claim 2, characterized in that: The parameter comparison module includes a parameter comparison component and a monitoring component, wherein: The enabling end of the parameter comparison component is electrically connected to the controlled end of the monitoring component; The monitoring end of the monitoring component is electrically connected to the communication end of the main acquisition module, and the sending end of the monitoring component is electrically connected to the third receiving end of the parameter comparison component; The fourth receiving end of the parameter comparison component is electrically connected to the communication end of the first communication component, and the feedback end of the parameter comparison component is electrically connected to the second receiving end of the parameter sending circuit.

4. The battery parameter acquisition device based on a redundancy mechanism according to claim 3, characterized in that: The monitoring component includes a monitoring chip, a diode and a voltage regulator tube, wherein: The controlled end of the monitoring chip is electrically connected to the enabling end of the parameter comparison component, the monitoring end of the monitoring chip is electrically connected to the communication end of the main acquisition module, and the transmitting end of the monitoring chip is electrically connected to the third receiving end of the parameter comparison component; The grounding terminal of the monitoring chip is electrically connected to the cathode of the voltage regulator tube and is used for grounding, the anode of the voltage regulator tube is electrically connected to the anode of the diode, and the cathode of the diode is electrically connected to the controlled terminal of the monitoring chip.

5. A battery parameter acquisition device based on a redundancy mechanism according to any one of claims 1 to 4, characterized in that: The main acquisition circuit also includes a balancing module, wherein: The equalizing end of the equalizing module is used to electrically connect to the transmitting end of the battery testing circuit, and the transmitting end of the equalizing module is electrically connected to the collecting end of the main collecting module.

6. The battery parameter acquisition device based on redundancy mechanism according to claim 5, characterized in that: The communication module includes a second communication component, a current limiting device and a filter device, wherein: The receiving end of the second communication component is electrically connected to one end of the current limiting device and the other end of the current limiting device is electrically connected to the communication end of the main acquisition module, and the sending end of the second communication component is electrically connected to the first receiving end of the parameter sending circuit; One end of the filter device is electrically connected to the receiving end of the second communication component and the other end of the filter device is grounded.

7. An electronic device, characterized in that: The electronic device comprises a battery parameter acquisition device based on a redundancy mechanism as described in any one of claims 1 to 6.

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