WO2020173352A1

WO2020173352A1 - Sampling circuit, and control method for same

Info

Publication number: WO2020173352A1
Application number: PCT/CN2020/075873
Authority: WO
Inventors: 杨大春; 刘宇; 刘昌鑑; 李前邓
Original assignee: 宁德时代新能源科技股份有限公司
Priority date: 2019-02-26
Filing date: 2020-02-19
Publication date: 2020-09-03
Also published as: CN110967648A

Abstract

A sampling circuit and a control method for the same. The circuit comprises: a sampling processing module (M), a controller (C), and a first isolation module (G1) and a second isolation module (G2) connected to the controller (C). The first isolation module (G1), the sampling processing module (M), and the second isolation module (G2) are sequentially connected to form a first daisy chain, in addition, the first isolation module (G1), the sampling processing module (M), and the second isolation module (G2) are sequentially connected to further form a second daisy chain. The sampling processing module (M) is used to acquire state data of multiple battery cell units of a battery pack (P), and to determine a first maximum value and a first minimum value from the acquired state data. The first daisy chain is used to transmit the state data of the multiple battery cell units of the battery pack (P) to the controller (C), and the second daisy chain is used to transmit the first maximum value and the first minimum value to the controller (C). The controller (C) is used to determine, on the basis of the first maximum value and/or the first minimum value, whether the battery pack (P) has an anomaly. In this way, the invention enables immediate detection of a battery pack (P) anomaly.

Description

采样电路及其控制方法相关申请的交叉引用 Sampling circuit and its control method

本申请要求享有于 2019年 02月 26日提交的名称为“采样电路及其控制方法”的中国专利申请 201910142770.2的优先权，该申请的全部内容通过引用并入本文中。技术领域 This application claims the priority of the Chinese patent application 201910142770.2 entitled "Sampling Circuit and Its Control Method" filed on February 26, 2019. The entire content of this application is incorporated herein by reference. Technical field

本申请涉及电池领域，特别是涉及一种采样电路及其控制方法。背景技术 This application relates to the field of batteries, in particular to a sampling circuit and a control method thereof. Background technique

以内燃机为核心的传统汽车发展已接近顶峰，加上能源日益紧张，环境污染等问题，世界各国纷纷推出了燃油汽车禁售时间表，大力支持新能源汽车的发展。近年以来，得益于国家政策的扶持，新能源行业得以蓬勃发展，因此带动了电动汽车行业的迅猛发展，已隐隐呈现出取代传统燃油汽车的趋势。对于电动汽车而言，电池包就相当于燃油汽车的汽油，电池包中的电池模组是电池包的重要组成单元。因此如何快速精准的采集电池模组中每个电芯单元的状态数据，以及在电池包发生异常时进行及时处理，保障乘车人的安全成为了行业关注的焦点。 The development of traditional automobiles with internal combustion engines as the core is nearing its peak. In addition to the increasing energy shortage and environmental pollution, countries around the world have introduced a timetable for the ban on the sale of fuel vehicles to vigorously support the development of new energy vehicles. In recent years, thanks to the support of national policies, the new energy industry has been able to develop vigorously, which has led to the rapid development of the electric vehicle industry, and has faintly shown a trend to replace traditional fuel vehicles. For electric vehicles, the battery pack is equivalent to the gasoline of a petrol vehicle, and the battery module in the battery pack is an important component of the battery pack. Therefore, how to quickly and accurately collect the status data of each cell unit in the battery module, and to deal with it in time when the battery pack is abnormal, and to ensure the safety of passengers has become the focus of the industry.

目前已知的电池模组数据采样方法，大多都是采用单链菊花链采集电池包中每个电芯的状态数据，例如电压，电流，温度等数据，然后将电芯状态数据通过菊花链传输到电池管理单元中的微控制单元 (Microcontroller Unit, MCU) 。 MCU对电芯状态数据进行分析处理，当发现异常时上报故障，然后由乘车人自行判断处理。 The currently known battery module data sampling methods mostly use a single-chain daisy chain to collect the status data of each cell in the battery pack, such as voltage, current, temperature, etc., and then transmit the cell status data through the daisy chain To the Microcontroller Unit (MCU) in the battery management unit. The MCU analyzes and processes the battery state data, and reports the fault when an abnormality is found, and then the passenger judges and processes it by himself.

但是，由于电动汽车 MCU需要处理的数据众多，往往不能及时发现电池包异常，不能及时上报故障。已有的方式是 MCU对各个电芯单元的状态数据进行逐一核对，直至发现某一电芯单元的状态数据异常时，才能判断电池包发生异常。这种处理机制下 MCU需要较长时间才能发现电芯状态数据异常，导致故障无法及时上报。也就是说，电池管理单元发现电池包异常的时效性较低。发明内容 However, due to the large amount of data that the MCU of the electric vehicle needs to process, it is often impossible to detect the abnormality of the battery pack in time and report the fault in time. The existing method is that the MCU checks the status data of each cell unit one by one until it finds that the status data of a certain cell unit is abnormal. It is judged that the battery pack is abnormal. Under this processing mechanism, it takes a long time for the MCU to discover the abnormality of the battery state data, resulting in failure to be reported in time. In other words, the battery management unit finds that the battery pack is abnormal in timeliness. Summary of the invention

本申请实施例一种采样电路和采样电路的控制方法，实现了提高了发现电池包异常的及时性。 The sampling circuit and the control method of the sampling circuit in the embodiments of the present application realize the improvement of the timeliness of detecting abnormality of the battery pack.

根据本申请实施例的一方面，提供一种采样电路，该电路包括：采样处理模块、控制器以及与控制器连接的第一隔离模块和第二隔离模块；其中， According to an aspect of the embodiments of the present application, a sampling circuit is provided, the circuit includes: a sampling processing module, a controller, and a first isolation module and a second isolation module connected to the controller; wherein,

第一隔离模块、采样处理模块和第二隔离模块依次串联形成第一菊花链，且第一隔离模块、采样处理模块和第二隔离模块依次串联还形成第二菊花链； The first isolation module, the sampling processing module, and the second isolation module are connected in series to form a first daisy chain, and the first isolation module, the sampling processing module, and the second isolation module are connected in series to form a second daisy chain;

采样处理模块用于采集电池包中多个电芯单元的状态数据并在采集到的多个电芯单元的状态数据中，确定第一最大值和第一最小值； The sampling processing module is used to collect the state data of a plurality of battery cells in the battery pack and determine the first maximum value and the first minimum value among the collected state data of the plurality of battery cells;

第一菊花链用于将电池包中多个电芯单元的状态数据传输至控制器，第二菊花链用于将第一最大值和第一最小值传输至控制器； The first daisy chain is used to transmit state data of a plurality of battery cells in the battery pack to the controller, and the second daisy chain is used to transmit the first maximum value and the first minimum value to the controller;

控制器用于基于第一最大值和 /或第一最小值，判断电池包是否出现异常。 The controller is used for judging whether the battery pack is abnormal based on the first maximum value and/or the first minimum value.

根据本申请实施例的再一方面，提供一种采样电路的控制方法，应用于本申请实施例提供的采样电路，采样电路的控制方法，包括： According to another aspect of the embodiments of the present application, there is provided a control method of a sampling circuit, which is applied to the sampling circuit provided in the embodiments of the present application, and the control method of the sampling circuit includes:

控制器接收通过第二菊花链传输的第一最大值和第一最小值；控制器根据第一最大值和 /或第一最小值，判断电池包是否出现异常。根据本申请实施例中的采样电路和采样电路的控制方法，通过利用第二菊花链将电池包所有电芯单元的状态数据中的最大值和最小值快速传输至控制器，由于最大值和最小值的数据传输量小，因此控制器可以根据电池包所有电芯单元的状态数据中的最大值和最小值及时判断电池包是否出现异常。附图说明 The controller receives the first maximum value and the first minimum value transmitted through the second daisy chain; the controller determines whether the battery pack is abnormal according to the first maximum value and/or the first minimum value. According to the sampling circuit and the control method of the sampling circuit in the embodiments of the present application, the maximum value and the minimum value of the state data of all the battery cells of the battery pack are quickly transmitted to the controller by using the second daisy chain. The data transmission volume of the value is small, so the controller can determine whether the battery pack is abnormal in time according to the maximum value and the minimum value in the state data of all the battery cells of the battery pack. Description of the drawings

下面将通过参考附图来描述本申请示例性实施例的特征、优点和技术效果。 The features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

图 1为本申请第一实施例提供的采样电路的结构示意图； FIG. 1 is a schematic structural diagram of a sampling circuit provided by the first embodiment of the application;

图 2为本申请第二实施例提供的采样电路的结构示意图； FIG. 2 is a schematic diagram of the structure of the sampling circuit provided by the second embodiment of the application;

图 3为本申请第三实施例提供的采样电路的结构示意图； FIG. 3 is a schematic structural diagram of a sampling circuit provided by a third embodiment of this application;

图 4为本申请第四实施例提供的采样电路的结构示意图； FIG. 4 is a schematic structural diagram of a sampling circuit provided by a fourth embodiment of the application;

图 5为本申请实施例提供的采样电路的控制方法的流程示意图。具体实施方式 FIG. 5 is a schematic flowchart of a control method of a sampling circuit provided by an embodiment of the application. detailed description

下面结合附图和实施例对本申请的实施方式作进一步详细描述。以下实施例的详细描述和附图用于示例性地说明本申请的原理，但不能用来限制本申请的范围，即本申请不限于所描述的实施例。 The implementation of the present application will be described in further detail below in conjunction with the drawings and embodiments. The detailed description and drawings of the following embodiments are used to exemplarily illustrate the principle of the application, but cannot be used to limit the scope of the application, that is, the application is not limited to the described embodiments.

需要说明的是，在本文中，诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来，而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且，术语 “包括” 、 “包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句 “包括 ” 限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。 It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply one of these entities or operations. There is any such actual relationship or order between. Moreover, the terms "including", "including" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes those that are not explicitly listed Other elements of the process, method, article, or equipment are inherent elements. If there are no more restrictions, the element defined by the sentence “includes” does not exclude the existence of other identical elements in the process, method, article, or equipment that includes the element.

为了更好的理解本申请，下面将结合附图，详细描述根据本申请实施例的采样电路及其控制方法。应注意，这些实施例并不是用来限制本申请公开的范围。 In order to better understand the present application, the sampling circuit and its control method according to the embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that these embodiments are not used to limit the scope of the disclosure of this application.

图 1示出本申请一些实施例提供的采样电路的结构示意图。如图 1所示，本申请实施例提供的采样电路包括：采样处理模块 M、控制器 C以及与控制器 C连接的第一隔离模块 G1和第二隔离模块 G2。其中，第一隔离模块 Gl、采样处理模块 M和第二隔离模块 G2依次串联形成第一菊花链，且第一隔离模块 G1、采样处理模块 M和第二隔离模块 G2依次串联还形成第二菊花链。 Fig. 1 shows a schematic structural diagram of a sampling circuit provided by some embodiments of the present application. As shown in FIG. 1, the sampling circuit provided by the embodiment of the present application includes: a sampling processing module M, a controller C, and a first isolation module G1 and a second isolation module G2 connected to the controller C. Wherein, the first isolation module G1, the sampling processing module M, and the second isolation module G2 are connected in series to form a first daisy chain, and the first isolation module G1, the sampling processing module M, and the second isolation module G2 are connected in series to form a second daisy chain. chain.

采样处理模块 M用于采集电池包中多个电芯单元的状态数据并在采集到的多个电芯单元的状态数据中，确定第一最大值和第一最小值。 The sampling processing module M is used to collect state data of multiple battery cells in the battery pack and determine the first maximum value and the first minimum value among the collected state data of the multiple battery cells.

第一菊花链用于将电池包 P中多个电芯单元的状态数据传输至控制器 C, 第二菊花链用于将第一最大值和第一最小值传输至控制器 C。 The first daisy chain is used to transmit the state data of multiple battery cells in the battery pack P to the controller C, and the second daisy chain is used to transmit the first maximum value and the first minimum value to the controller C.

控制器 C用于基于第一最大值和 /或第一最小值，判断电池包 P是否出现异常。 The controller C is used for judging whether the battery pack P is abnormal based on the first maximum value and/or the first minimum value.

需要说明的是，采样处理模块 M采集的电池包 P的多个电芯采样单元的状态数据为电池包 P中所有电芯单元的状态数据。 It should be noted that the state data of the multiple cell sampling units of the battery pack P collected by the sampling processing module M is the state data of all the cell units in the battery pack P.

在本申请的实施例中，状态数据可以为电压、电流、温度、电荷状态等数据，在此并不限定。当采样处理模块 M采集电芯单元的多种不同的状态数据时，则通过第二菊花链传输电池包内所有电芯单元的所有状态数据中每种状态数据的最大值和最小值至控制器 C。 In the embodiment of the present application, the state data may be data such as voltage, current, temperature, charge state, etc., which is not limited herein. When the sampling processing module M collects various state data of the battery cell unit, the maximum and minimum value of each state data among all the state data of all the battery cells in the battery pack are transmitted to the controller through the second daisy chain C.

本申请实施例提供的采样电路，通过第一菊花链传输电池包 P中所有电芯单元的状态数据至控制器 C，通过第二菊花链传输电池包内所有电芯单元的状态数据中的第一最大值和第一最小值至控制器 C。由于第二菊花链的数据量小，因此第一最大值和第一最小值优先传输至控制器 C。当控制器 C接收到上述第一最大值和第一最小值之后，则立刻根据第一最大值和第一最小值判断电池包 P是否出现异常。因此根据上述第一最大值和第一最小值可以及时发现电池包 P中出现异常的电芯状态数据，从而及时判断电池包 P是否出现异常。 The sampling circuit provided by the embodiment of the present application transmits the state data of all the cell units in the battery pack P to the controller C through the first daisy chain, and transmits the first of the state data of all the cell units in the battery pack through the second daisy chain. A maximum value and a first minimum value to the controller C. Since the data amount of the second daisy chain is small, the first maximum value and the first minimum value are transmitted to the controller C first. After the controller C receives the first maximum value and the first minimum value, it immediately determines whether the battery pack P is abnormal according to the first maximum value and the first minimum value. Therefore, according to the above-mentioned first maximum value and the first minimum value, abnormal cell state data in the battery pack P can be found in time, so as to determine whether the battery pack P is abnormal in time.

在本申请的一些实施例中，控制器 C可根据第一最大值和第一预设阈值的大小关系，以及第一最小值和第二预设阈值的大小关系，判断电池包 P是否出现异常。若第一最大值大于第一预设阈值和 /或第一最小值小于第二预设阈值时，则代表电芯单元的状态数据出现异常。也就是说，电池包出现异常。 In some embodiments of the present application, the controller C can determine whether the battery pack P is abnormal based on the relationship between the first maximum value and the first preset threshold, and the relationship between the first minimum value and the second preset threshold. . If the first maximum value is greater than the first preset threshold and/or the first minimum value is less than the second preset threshold, it means that the state data of the battery cell unit is abnormal. In other words, the battery pack is abnormal.

当控制器 C发现电池包 P出现异常后，可以通过控制图 1中的开关模块 K来及时处理电池包 P的异常，以提高电池包 P的安全性。 When the controller C finds that the battery pack P is abnormal, it can control the switch mode in Figure 1 Block K is used to deal with the abnormality of the battery pack P in time to improve the safety of the battery pack P.

如图 1所示，开关模块 K，分别与电池包 P和控制器 C连接。并且，开关模块 K与电池包 P设置于电池包 P的主回路中。其中，电池的主回路中不仅包括电池包 P和开关模块 K，还包括负载（图 1中未示出）。当开关模块 K处于闭合状态时，主回路处于导通状态，电池包 P用于对主回路中的各种负载进行供电。其中，开关模块 K包括但不限于继电器。 As shown in Figure 1, the switch module K is connected to the battery pack P and the controller C respectively. In addition, the switch module K and the battery pack P are arranged in the main circuit of the battery pack P. Among them, the main circuit of the battery includes not only the battery pack P and the switch module K, but also the load (not shown in Figure 1). When the switch module K is in the closed state, the main circuit is in a conducting state, and the battery pack P is used to supply power to various loads in the main circuit. Among them, the switch module K includes but is not limited to a relay.

当控制器 C确定第一最大值大于第一预设阈值和 /或第一最小值小于第二预设阈值时，则发送断开指令至开关模块 K。开关模块 K基于断开指令从闭合状态转换为断开状态，以切断电池包 P所在主回路，从而提高电池包 P的安全性。 When the controller C determines that the first maximum value is greater than the first preset threshold and/or the first minimum value is less than the second preset threshold, it sends a disconnection instruction to the switch module K. The switch module K switches from the closed state to the open state based on the disconnection command to cut off the main circuit where the battery pack P is located, thereby improving the safety of the battery pack P.

需要说明的是，第一菊花链不仅可以用于传输电池包 P中所有电芯单元的所有状态数据至控制器 C，还可以用于传输第一最大值和第一最小值传输至控制器 C。类似地，第二菊花链不仅可以用于传输第一最大值和第一最小值传输至控制器 C，还可以用于传输电池包 P中所有电芯单元的所有状态数据至控制器 C。在实际应用中，可根据实际应用需求，利用两条菊花链将所有电芯单元的所有状态数据和最值（即第一最大值和第一最小值）分别传输至控制器 C即可。 It should be noted that the first daisy chain can be used not only to transmit all the state data of all the battery cells in the battery pack P to the controller C, but also to transmit the first maximum value and the first minimum value to the controller C. . Similarly, the second daisy chain can be used not only to transmit the first maximum value and the first minimum value to the controller C, but also to transmit all the state data of all the battery cells in the battery pack P to the controller C. In actual applications, according to actual application requirements, two daisy chains can be used to transmit all state data and maximum values (ie, the first maximum value and the first minimum value) of all battery cells to the controller C respectively.

图 2示出本申请另一些实施例提供的采样电路的结构示意图。图 2示出采样处理模块 M的具体结构。 Figure 2 shows a schematic structural diagram of a sampling circuit provided by other embodiments of the present application. Figure 2 shows the specific structure of the sampling processing module M.

在本申请实施例提供的采样电路可应用于对电池包 P中的电芯单元的状态数据进行采集的场景。电池包 P的组成单元为电池模组，电池包 P包括 N个电池模组。每个电池模组中有若干个电芯单元，增加电池模组的数量并通过合理的方式连接在一起就组成了电池包 P。 The sampling circuit provided in the embodiment of the present application can be applied to the scenario of collecting state data of the battery cell unit in the battery pack P. The battery pack P is composed of battery modules, and the battery pack P includes N battery modules. There are several battery cells in each battery module. The battery pack P is formed by increasing the number of battery modules and connecting them in a reasonable way.

如图 2所示，采样处理模块 M包括串联的 N个采样处理单元，即第 1 采样处理单元 _Ml、第 2采样处理单元 M₂... ...以及第 N采样处理单元As shown, the sample processing module M comprises a series of N samples processing units, i.e. the first sampling processing means _{of Ml,} the second sampling processing means M ₂ ... ..., and the N-th sampling processing unit 2

MN。 MN.

第一隔离模块 G1、第 1采样处理单元 M_b 第 2采样处理单元 M₂... ...

The first isolation module G1, the first sampling processing unit M _b, the second sampling processing unit M ₂ ... ...

且，第一隔离模块 G1、第 1采样处理单元 M:、第 2采样处理单元 M₂... ...

Moreover, the first isolation module G1, the first sampling processing unit M:, the second sampling processing unit M ₂ ...

其中，每个采样处理单元均与一个电池模组连接，用于采集与该采样单元对应的电池模组中每个电芯的状态数据。 Among them, each sampling processing unit is connected to a battery module, and is used to collect the state data of each cell in the battery module corresponding to the sampling unit.

作为一个示例，控制器为电池管理单元的 MCU。参考图 2, 开关模块 K与电池包的正极连接。 As an example, the controller is an MCU of the battery management unit. Refer to Figure 2, the switch module K is connected to the positive terminal of the battery pack.

在一些示例中，第一菊花链和第二菊花链上使用的均为通用异步收发传输器 (Universal Asynchronous Receiver/Transmitter, UART ) 1办议。 In some examples, both the first daisy chain and the second daisy chain use Universal Asynchronous Receiver/Transmitter (UART) 1 to discuss.

在一些示例中，利用导线连接第一隔离模块 G1的第一 UART通信接口、第 1采样处理单元 Mi的第一 UART通信接口、第 2采样处理单元 M₂ 的第一 UART通信接口 .第 N采样处理单元 M_n的第一 UART通信接口和第二隔离模块 G2的第一 UART通信接口，即形成第一菊花链。也就是说，第一隔离模块 G1、第 1采样处理单元 Mi、第 2采样处理单元 M₂... ...第 N采样处理单元 M_N以及第二隔离模块 G2，以及每两个相邻的第一 UART通信接口之间的导线共同形成第一菊花链。 In some examples, the UART communication interface using a first wire connecting the first isolation module G1, the first sample processing unit Mi first UART communication interface, the second sampling processing unit of the first communication interface UART M ₂ in. Sample of N The first UART communication interface of the processing unit M _{n and} the first UART communication interface of the second isolation module G2 form a first daisy chain. That is, a first spacer block G1, a first sampling processing means Mi, the second sampling processing unit of M ₂ ... ... N M _N sampling processing unit and a second isolation module G2, and each two adjacent The wires between the first UART communication interface together form a first daisy chain.

相类似地，利用导线连接第一隔离模块 G1 的第二 UART通信接口、第 1采样处理单元 Mi的第二 UART通信接口、第 2采样处理单元 M₂的第二 UART通信接口 .第 N采样处理单元 M_N的第二 UART通信接口和第二隔离模块 G2 的第二 UART通信接口，即形成第二菊花链。也就是说，第一隔离模块 G1、第 1采样处理单元 M_b 第 2采样处理单元 M₂... ... 第 N采样处理单元 M_N以及第二隔离模块 G2，以及每两个相邻的第二 UART通信接口之间的导线共同形成第二菊花链。 Similarly, using the second wire UART communication interface module connected to the first isolation of G1, the first sample processing unit Mi second UART communication interface, the second sample processing unit M ₂ in the second UART communication interface. Processing of N samples M _N second unit UART communication interface module and a second spacer G2, the second UART communication interface, i.e. forming the second daisy chain. That is, a first spacer block G1, a first sampling processing means M _b M second sample processing unit ₂ ... ... N-M _N-sampling processing unit and a second isolation module G2, and each two adjacent The wires between the second UART communication interfaces together form a second daisy chain.

在本申请的实施例中，第一隔离模块 G1、控制器 C和第二隔离模块 G2集成在印刷电路板上。第一隔离模块 G1和控制器 C之间、以及第二隔离模块 G2 和控制器 C 之间均使用串行外设接口 ( Serial Peripheral Interface， SPI) 通信协议进行交互数据。 In the embodiment of the present application, the first isolation module G1, the controller C, and the second isolation module G2 are integrated on the printed circuit board. The serial peripheral interface (Serial Peripheral Interface, SPI) communication protocol is used to exchange data between the first isolation module G1 and the controller C, and between the second isolation module G2 and the controller C.

由于第一菊花链或第二菊花链上均使用 UART协议，而印刷电路板上内部使用的 SPI通信协议，因此第一隔离模块 G1和第二隔离模块 G2用于将 UART数据转换为 SPI数据，以完成通信。另外，第一隔离模块 G1还用于隔离采样处理模块 M和电池包对控制器 C 的高压，以避免电池包和采样处理模块对控制器 C造成伤害。第二隔离模块 G2还用于隔离采样处理模块 M和电池包对控制器 C 的低压，以避免电池包和采样处理模块对控制器 C造成伤害。 Since the UART protocol is used in the first daisy chain or the second daisy chain, and the SPI communication protocol used internally on the printed circuit board, the first isolation module G1 and the second isolation module G2 are used to convert UART data into SPI data, To complete the communication. In addition, the first isolation module G1 is also used to isolate the high voltage of the sampling processing module M and the battery pack to the controller C, so as to avoid the battery pack and The sampling processing module causes damage to the controller C. The second isolation module G2 is also used to isolate the low voltage of the sampling processing module M and the battery pack to the controller C, so as to prevent the battery pack and the sampling processing module from causing damage to the controller C.

作为一个具体示例，控制器 C具有 4个 SPI通信接口，其中两个 SPI 通信接口与第一隔离模块 G1 的两个 SPI通信接口分别连接，用于分别与第一菊花链和第二菊花链通信。控制器 C的另外两个 SPI通信接口与第二隔离模块 G2的两个 SPI通信接口分别连接，用于分别与第一菊花链和第二菊花链通信。 As a specific example, the controller C has four SPI communication interfaces, of which two SPI communication interfaces are connected to the two SPI communication interfaces of the first isolation module G1, respectively, for communicating with the first daisy chain and the second daisy chain respectively . The other two SPI communication interfaces of the controller C are respectively connected to the two SPI communication interfaces of the second isolation module G2, and are used to communicate with the first daisy chain and the second daisy chain respectively.

作为一个示例，控制器 C通过与第一隔离模块连接、且与第一菊花链通信的 SPI通信接口发送第一控制指令至第一隔离模块 G1 的第一 UART 通信接口。第一隔离模块 G1 通过第一菊花链将第一控制指令依次传输至每个采样处理单元。例如，第一控制指令用于控制每个采样处理单元开始采集对应电池模组中的状态数据。 As an example, the controller C sends the first control command to the first UART communication interface of the first isolation module G1 through an SPI communication interface connected to the first isolation module and communicating with the first daisy chain. The first isolation module G1 sequentially transmits the first control instruction to each sampling processing unit through the first daisy chain. For example, the first control instruction is used to control each sampling processing unit to start collecting status data in the corresponding battery module.

同理，每个采样处理单元通过第一菊花链，将从对应的电池模组中采集的每个电芯单元的状态数据均传输至第二隔离模块 G2。比如，第 1 采样处理单元 Mi通过第一菊花链中第 1采样处理单元 Mi和第 2采样处理单元 M₂之间的线路，将采集的第 1 电池模组中每个电芯单元的状态数据传输至第 2采样处理单元 M₂。第 2采样处理单元 M₂通过第一菊花链中第 2 采样处理单元 M₂和第 3采样处理单元 M₃之间的线路，将采集的第 2电池模组中每个电芯单元的状态数据以及第 1 电池模组中每个电芯单元的状态数据传输至第 3采样处理单元 M₃。依次类推，从上到下传输（即从第 1采样处理单元 Mi指向第 N采样处理单元 M_N的方向），第 N采样处理单元 M_N将获取电池包 P 中所有电芯单元的状态数据，并通过第一菊花链中第 N采样处理单元和第二隔离模块 G2之间的线路将电池包 P中所有电芯单元的状态数据传输至第二隔离模块 G2。第二隔离模块 G2将电池包 P中所有电芯单元的状态数据传输至控制器，形成环状菊花链通信结构。 In the same way, each sampling processing unit transmits the state data of each cell unit collected from the corresponding battery module to the second isolation module G2 through the first daisy chain. For example, the first sampling processing unit Mi uses the line between the first sampling processing unit Mi and the second sampling processing unit M ₂ in the first daisy chain to collect the status data of each cell unit in the first battery module It is transmitted to the second sampling processing unit M ₂ . The second sampling processing unit M ₂ uses the line between the second sampling processing unit M ₂ and the third sampling processing unit M ₃ in the first daisy chain to collect the status data of each cell unit in the second battery module And the state data of each cell unit in the first battery module is transmitted to the third sampling processing unit M ₃ . And so on, transmitted from top to bottom (i.e., from the first sample processing unit 1 Mi N sampling point direction of the process unit M _N), the N-th sampling processing unit acquires the status data M _N P battery pack all of the battery cell, And through the line between the Nth sampling processing unit in the first daisy chain and the second isolation module G2, the state data of all the cell units in the battery pack P are transmitted to the second isolation module G2. The second isolation module G2 transmits the state data of all the battery cells in the battery pack P to the controller to form a ring-shaped daisy chain communication structure.

在本申请的另一些实施例中，控制器 C也可以将第一控制指令发送至第二隔离模块 G2, 通过第一菊花链将第一控制指令依次传输至每个采样处理单元。采样处理单元从下到上传输（即从第 N采样处理单元 M_N指向第 1采样处理单元 Mi的方向）。

中所有电芯单元的状态数据通过第一隔离模块 G1 传输至控制器 C，形成环状菊花链通信结构。 In other embodiments of the present application, the controller C may also send the first control instruction to the second isolation module G2, and sequentially transmit the first control instruction to each sampling processing unit through the first daisy chain. From the sampling processing unit to the transmission (i.e., N sample points from the first processing unit M _N The direction of the first sampling processing unit Mi).

The state data of all the battery cells in the battery is transmitted to the controller C through the first isolation module G1, forming a ring-shaped daisy chain communication structure.

在本申请的实施例中，控制器 C通过与第一隔离模块 G1连接、且与第二菊花链通信的 SPI通信接口发送第二控制指令至第一隔离模块 G1 的第二 UART通信接口。第一隔离模块 G1通过第二菊花链依次传输第二控制指令至每个采样处理单元。例如，第二控制指令用于控制每个采样处理单元获取对应电池模组中所有电芯单元的状态数据的最大值和最小值。 In the embodiment of the present application, the controller C sends the second control command to the second UART communication interface of the first isolation module G1 through an SPI communication interface connected to the first isolation module G1 and communicating with the second daisy chain. The first isolation module G1 sequentially transmits the second control instruction to each sampling processing unit through the second daisy chain. For example, the second control instruction is used to control each sampling processing unit to obtain the maximum value and the minimum value of the state data of all cell units in the corresponding battery module.

对于每个采样处理单元，采样处理单元将会自动比较得出该采样处理单元对应的电池模组中所有电芯单元的状态数据的最大值和最小值，同时还能够接受其他电池模组中所有电芯单元的状态数据的最大值和最小值，并与本电池模组中所有电芯单元的状态数据的最大值和最小值进行比较。 For each sampling processing unit, the sampling processing unit will automatically compare to obtain the maximum and minimum value of the state data of all battery cells in the battery module corresponding to the sampling processing unit. At the same time, it can also accept all battery modules in other battery modules. The maximum and minimum values of the state data of the battery cell unit are compared with the maximum and minimum values of the state data of all the battery cells in the battery module.

比如，第 1采样处理单元 Mi得出第 1 电池模组中电芯单元的状态数据的最大值 ml和最小值 nl后，通过第二菊花链中第 1采样处理单元 Mi 和第 2采样处理单元 ₂之间的线路将第 1 电池模组中电芯单元的状态数据的最大值 ml和最小值 nl发送至第 2采样处理单元 M₂。第 2采样处理单元 M₂得出第 2 电池模组中电芯单元的状态数据的最大值 m2和最小值 n2后，与第 1电池模组中电芯单元的状态数据的最大值 ml和最小值 nl进行比较，得出 ml和 m2中的最大值，以及 nl和 n2中的最小值。 For example, after the first sampling processing unit Mi obtains the maximum value ml and the minimum value nl of the state data of the battery cell unit in the first battery module, it passes through the first sampling processing unit Mi and the second sampling processing unit in the second daisy chain The line between ₂ sends the maximum value ml and the minimum value nl of the state data of the cell unit in the first battery module to the second sampling processing unit M ₂ . After the second sampling processing unit M ₂ obtains the maximum value m2 and the minimum value n2 of the state data of the battery cell unit in the second battery module, and the maximum value ml and the minimum value of the state data of the battery cell unit in the first battery module are obtained. The value nl is compared to obtain the maximum value of ml and m2, and the minimum value of nl and n2.

假设为 ml大于 m2， nl小于 n2，第 2采样处理单元 M₂通过第二菊花链中第 2采样处理单元 M₂和第 3采样处理单元 M₃之间的线路，将 ml和 nl传输至第 3采样处理单元 M₃。依次类推，通过第二菊花链逐级传输，

Ml assumed to be greater than m2, nl is less than n2, the second line between the ₃ M ₂ sampling by the second processing unit in the daisy chain the second sample processing unit M ₂ and the third sampling processing section M, ml and nl is transmitted to the first 3 Sampling processing unit M ₃ . By analogy, through the second daisy chain transmission step by step,

第一最大值和第一最小值。 The first maximum value and the first minimum value.

第 N采样处理单元 M_N通过第二菊花链中第 N采样处理单元和第二隔离模块 G2之间的线路，将第一最大值和第一最小值传输至第二隔离模块 G2 _o 第二隔离模块 G2再将第一最大值和第一最小值传输至控制器 C，完成环状链路通信。 N-M _N-sampling processing unit via the second line in the daisy chain between the N-th sampling processing unit and the second isolation module G2, a first maximum value and the first minimum transmission module to the second spacer a second spacer G2 _o The module G2 then transmits the first maximum value and the first minimum value to the controller C to complete the ring link communication.

控制器 C根据第一最大值和第一最小值，即可判断电池包 P的异常。本申请实施例的采样电路，采用双链菊花链并且以环状菊花链通信结构的形式对电池模组中的电芯单元的状态数据进行采样，其中一个回路传输所有电芯单元的状态数据，另一个回路传输所有电芯单元的状态数据中的最大值与最小值。第二菊花链中仅传输所有电芯单元的状态数据中的最大值与最小值，数据量小，并且优先传输到控制器 c进行分析。若第一最大值大于预设的安全阈值，和 /或第一最小值小于预设的安全阈值，控制器 C直接断开电池包 P所在主回路的开关模块，判断时间短，响应速度快。并且在产生故障时，能快速地切断高压。 The controller C can determine the abnormality of the battery pack P based on the first maximum value and the first minimum value. The sampling circuit of the embodiment of the present application adopts a double-chain daisy chain and samples the state data of the battery cells in the battery module in the form of a circular daisy chain communication structure, and one loop transmits the state data of all the battery cells, The other loop transmits the maximum and minimum values of the status data of all battery cells. In the second daisy chain, only the maximum value and the minimum value of the state data of all the cell units are transmitted, and the amount of data is small, and the data is first transmitted to the controller c for analysis. If the first maximum value is greater than the preset safety threshold, and/or the first minimum value is less than the preset safety threshold, the controller C directly disconnects the switch module of the main circuit where the battery pack P is located, the judgment time is short, and the response speed is fast. And in the event of a fault, it can quickly cut off the high voltage.

在采样电路运行过程中，采样电路可能出现通信故障。比如第一菊花链发生单点通信故障，也就是说，采样电路形成的通路中某一节点掉线，会导致第一菊花链通信中断。或者，第一隔离模块 G1或第二隔离模块 G2 出现通信故障。针对采样电路中可能出现的故障，控制器 C可采取一系列措施，下面将进行详细说明。 During the operation of the sampling circuit, the sampling circuit may have a communication failure. For example, a single-point communication failure occurs in the first daisy chain, that is, a node in the path formed by the sampling circuit is offline, which will cause the first daisy chain communication to be interrupted. Or, the first isolation module G1 or the second isolation module G2 has a communication failure. For possible failures in the sampling circuit, the controller C can take a series of measures, which will be described in detail below.

1、当第一菊花链中第一隔离模块 G1和第 1采样处理单元 Mi之间的线路 A1 出现单点故障的情况下，则第一菊花链形成的环形通信回路断路。例如，控制器 C可以通过管理自身与第二隔离模块 G2连接、且与第一菊花链通信的 SPI通信接口，控制第二隔离模块 G2通过第一菊花链传输第一控制指令至每个采样处理单元。并控制第 1采样处理单元 Mi、第 2 采样处理单元 M₂ 第 N采样处理单元 M_n通过第一菊花链从上到下传

1. When a single-point fault occurs on the line A1 between the first isolation module G1 and the first sampling processing unit Mi in the first daisy chain, the annular communication loop formed by the first daisy chain is disconnected. For example, the controller C can control the second isolation module G2 to transmit the first control instruction to each sampling process through the first daisy chain by managing the SPI communication interface that is connected to the second isolation module G2 and communicates with the first daisy chain. unit. And control the first sampling processing unit Mi, the second sampling processing unit M _{2 and} the Nth sampling processing unit M _n from top to bottom through the first daisy chain

二隔离模块 G2传输至控制器 C。 The second isolation module G2 is transmitted to the controller C.

也就是说，控制器 C控制采样处理模块通过第一菊花链中第 1采样处

中多个电芯单元的状态数据至控制器 C。其中，电池包 P的多个电芯单元即为电池包 P中所有电芯单元。第一菊

In other words, the controller C controls the sampling processing module to pass through the first sampling point in the first daisy chain

State data of multiple cell units in the middle is sent to controller C. Among them, the multiple cell units of the battery pack P are all the cell units in the battery pack P. First chrysanthemum

间的多个线路包括第一菊花链中第 1采样处理单元 Mi和第 2采样处理单元 M₂之间的线路、第一菊花链中第 2采样处理单元 M₂和第 3采样处理单元 M₃之间的线路 ... ...以及第一菊花链中第 N采样处理单元 M_N和第二隔离模块 G2之间的线路。与线路 A1 故障时相类似，当第一菊花链中第二隔离模块 G2和第 N 采样处理单元 M_N之间的线路 A3 出现单点故障的情况下，则第一菊花链形成的环形通信回路断路。例如，控制器 C可以通过管理自身与第一隔离模块 G1连接、且与第一菊花链通信的 SPI通信接口，控制采样处理模块 M利用第一菊花链中第一隔离模块 G1和第 N采样处理单元 M_N 2间的多个线路，从下到上传输电池包 P中多个电芯单元的状态数据至控制器 C。其中，第一菊花链中第一隔离模块 G1和第 N采样处理单元 M_N 2间的多个线路包括：第一菊花链中第一隔离模块 G1和第 1采样处理单元 Mi之间的线路、第一菊花链中第 1采样处理单元 Mi和第 2采样处理单元 M₂之间的线路 ... ...以及第一菊花链中第 N-1采样处理单元 M_N_i和第 N采样处理单元 M_N之间的线路。 The multiple lines in the first daisy chain include the line between the first sampling processing unit Mi and the second sampling processing unit M ₂ in the first daisy chain, and the second sampling processing unit M ₂ and the third sampling processing unit M ₃ in the first daisy chain. ... ... and the line between the first line in the daisy chain between the N-sampling processing unit and a second isolation module M _N G2. Similar to the line fault A1, A3 in the case where the line between the first isolation module daisy chain in a second G2 and M _N N sampling processing unit of the single point of failure, the first daisy chained to form a ring communication loop Open circuit. For example, the controller C can control the sampling processing module M to use the first isolation module G1 and the Nth sampling process in the first daisy chain by managing the SPI communication interface connected to the first isolation module G1 and communicating with the first daisy chain. M _N unit of the plurality of line 2, the status data from the battery pack to the transmission power P in the plurality of core units to the controller C. Wherein the first isolation module daisy chain in a first sample G1 and the second processing unit N M _N 2 among the plurality of lines comprises: a first in the daisy chain between the line G1 and the first sample processing unit a first isolation module Mi, The line between the first sampling processing unit Mi and the second sampling processing unit M ₂ in the first daisy chain... and the N-1th sampling processing unit M _N _i and the Nth sampling processing in the first daisy chain line between the units M _N.

也就是说，当线路 A1或 A3出现故障时，控制器 C可以控制第一菊花链自适应地变成一个单链菊花链进行通信，以保证控制器 C可以接收到电池包 P中所有电芯单元的状态数据，提高通信的可靠性。 In other words, when the line A1 or A3 fails, the controller C can control the first daisy chain to adaptively become a single chain daisy chain for communication, so as to ensure that the controller C can receive all the cells in the battery pack P The status data of the unit improves the reliability of communication.

2、与线路 A1故障时相类似，当第二菊花链中第一隔离模块 G1和第 1采样处理单元 Mi之间的线路 B 1出现故障的情况下，则第二菊花链形成的环形通信回路断路。 2. Similar to the failure of line A1, when the line B1 between the first isolation module G1 and the first sampling processing unit Mi in the second daisy chain fails, the second daisy chain forms a circular communication loop Open circuit.

例如，控制器 C可以通过管理自身与第二隔离模块 G2连接、且与第二菊花链通信的 SPI通信接口，控制第二隔离模块 G2通过第二菊花链传输第二控制指令至每个采样处理单元。控制器 C控制采样处理模块 M通过第二菊花链中第 1采样处理单元 M^P第二隔离模块 G2之间的多个线路传输第一最大值和第一最小值至控制器。其中，第二菊花链中第 1采样处理单元 Mi和第二隔离模块 G2之间的多个线路包括：第二菊花链中第 1采样处理单元 Mi和第 2采样处理单元 M₂之间的线路、第二菊花链中第 2采样处理单元 M₂和第 3采样处理单元 M₃之间的线路 ... ...以及第二菊花链中

For example, the controller C can control the second isolation module G2 to transmit the second control command to each sampling process through the second daisy chain by managing the SPI communication interface that is connected to the second isolation module G2 and communicates with the second daisy chain. unit. The controller C controls the sampling processing module M to transmit the first maximum value and the first minimum value to the controller through multiple lines between the first sampling processing unit M and the second isolation module G2 in the second daisy chain. Wherein a plurality of the second line in the daisy chain between the first and second sampling processing unit Mi G2 isolation module comprises: a second line between _the first daisy chain Mi-sampling processing unit and the second sample processing unit M , The line between the second sampling processing unit M ₂ and the third sampling processing unit M ₃ in the second daisy chain... and in the second daisy chain

也就是说，通过第二菊花链逐级传输，第 N采样处理单元 M_N将会获取电池包 P的所有电芯单元的状态数据中的第一最大值和第一最小值，并通过第二隔离模块 G2将电池包 P的所有电芯单元的状态数据中的第一最大值和第一最小值传输至控制器 C。 That is, the second transfer step by step through the daisy chain, the N-th sampling processing unit M _N will collect all of the battery cell of the battery pack status data P in the first minimum and a first maximum value, and The first maximum value and the first minimum value in the state data of all cell units of the battery pack P are transmitted to the controller C through the second isolation module G2.

与线路 A3故障时相类似，当第二菊花链中第二隔离模块 G2和第 N 采样处理单元 M_N之间的线路 B3出现故障的情况下，例如，控制器 C可以通过管理自身与第一隔离模块 G1连接、且与第二菊花链通信的 SPI通信接口，控制第一隔离模块 G1 通过第二菊花链传输第二控制指令至每个采样处理单元。并控制采样处理模块 M通过第二菊花链中第一隔离模块 G1和第 N采样处理单元 M_N之间的多个线路传输第一最大值和第一最小值至控制器 C。其中，第二菊花链中第一隔离模块 G1和第 N采样处理单元 M_N 2间的多个线路包括：第二菊花链中第一隔离模块 G1和第 1采样处理单元 Mi之间的线路、第二菊花链中第 1采样处理单元 Mi和第 2采样处理单元 M₂之间的线路 ... ...以及第二菊花链中第 N-1采样处理单元和第 N采样处理单元 M_N之间的线路。 When a fault is similar to the line A3, B3 in the case where the line between the second isolation module daisy chain in a second G2 and M _N N sampling processing unit failure, e.g., by the controller C may manage itself first The isolation module G1 is connected to the SPI communication interface that communicates with the second daisy chain, and controls the first isolation module G1 to transmit the second control instruction to each sampling processing unit through the second daisy chain. And the control sample module M via a plurality of transmission lines between the second isolation module daisy chain in a first sample G1 and the second processing unit N M _N first maximum and a first minimum value to the controller C. Wherein the second isolation module daisy chain in a first sample G1 and the second processing unit N M _N 2 among the plurality of lines comprises: a second line in the daisy chain between G1 and the first sample processing unit a first isolation module Mi, The line between the first sampling processing unit Mi and the second sampling processing unit M ₂ in the second daisy chain... and the N-1th sampling processing unit and the Nth sampling processing unit M _N in the second daisy chain Between the lines.

也就是说，通过第二菊花链逐级传输，第 1采样处理单元 Mi将会获取电池包 P的所有电芯单元的状态数据中的第一最大值和第一最小值，并通过第一隔离模块 G1将电池包 P的所有电芯单元的状态数据中的第一最大值和第一最小值传输至控制器 C。 That is, through the second daisy chain transmission step by step, the first sampling processing unit Mi will obtain the first maximum value and the first minimum value of the state data of all the cell units of the battery pack P, and pass the first isolation The module G1 transmits the first maximum value and the first minimum value in the state data of all the battery cells of the battery pack P to the controller C.

也就是说，当线路 B1或 B3出现故障时，控制器 C可以控制第二菊花链自适应地变成一条单链菊花链进行通信，以保证控制器 C可以接收到电池包 P 中所有电芯单元的状态数据的最大值和最小值，提高通信的可靠性。 That is, when the line B1 or B3 fails, the controller C can control the second daisy chain to adaptively become a single chain daisy chain for communication, so as to ensure that the controller C can receive all the cells in the battery pack P The maximum and minimum values of the status data of the unit improve the reliability of communication.

值得一提的是，当第一菊花链能够正常通信时，控制器 C 自身与第一菊花链通信的两个 SPI通信接口分别用于发送第一控制指令和接收采样处理模块 M的采集数据。但是，在第一菊花链中当线路 A1或 A3出现故障时，控制器 C仅存在一个能够与第一菊花链正常通信的 SPI通信接口，并且通过该 SPI通信接口既可以发送第一控制指令至采样处理模块 M，也可以接收采样处理模块 M通过隔离模块传输过来的数据。 It is worth mentioning that when the first daisy chain can communicate normally, the two SPI communication interfaces between the controller C itself and the first daisy chain are used to send the first control instruction and receive the collected data of the sampling processing module M, respectively. However, when the line A1 or A3 fails in the first daisy chain, the controller C has only one SPI communication interface that can communicate normally with the first daisy chain, and the first control command can be sent to the controller through the SPI communication interface. The sampling processing module M may also receive data transmitted from the sampling processing module M through the isolation module.

同理，在第二菊花链中当线路 B1或 B3出现故障时，控制器 C通过仅存在的能够与第二菊花链正常通信的一个 SPI通信接口既可以发送第二控制指令至采样处理模块 M，也可以接收采样处理模块 M通过隔离模块传输过来的数据。 Similarly, when the line B1 or B3 fails in the second daisy chain, the controller C can send the second control through only one SPI communication interface that can communicate normally with the second daisy chain. The command is sent to the sampling processing module M, and the data transmitted from the sampling processing module M through the isolation module can also be received.

3、当第一菊花链中第 i采样处理单元与第 i+1采样处理单元之间的线路 A2出现故障的情况下，控制器 C不仅通过管理自身与第一隔离模块 G1 连接、且与第一菊花链通信的 SPI通信接口，控制第 1采样处理单元 M:、第 2采样处理单元 M₂... ...以及第 i采样处理单元通过第一菊花链中第一隔离模块 G1和第 i采样处理单元之间的多个线路，传输第 1采样处理单元 Mi至第 i采样处理单元中多个采样处理单元对应的多个电芯单元的状态数据至控制器 C。 3. When the line A2 between the i-th sampling processing unit and the i+1-th sampling processing unit in the first daisy chain fails, the controller C not only manages itself to be connected to the first isolation module G1, but also to the first isolation module G1. An SPI communication interface for daisy chain communication, which controls the first sampling processing unit M:, the second sampling processing unit M ₂ ... and the i-th sampling processing unit through the first isolation module G1 and the first isolation module G1 in the first daisy chain The multiple lines between the i sampling processing units transmit the state data of the multiple cell units corresponding to the multiple sampling processing units from the first sampling processing unit Mi to the i-th sampling processing unit to the controller C.

并且，控制器 C还通过管理自身与第二隔离模块 G2连接、且与第一菊花链通信的 SPI通信接口，控制第 i+1采样处理单元、第 i+2采样处理单元 ... ...第 N采样处理单元 M_N通过第一菊花链中第 i+1采样处理单元和第二隔离模块 G2之间的多个线路，传输第 i+1采样处理单元至第 N采样处理单元 M_n中多个采样处理单元对应的多个电芯单元的状态数据至控制器 C， i为小于 N的正整数。 In addition, the controller C also controls the i+1th sampling processing unit, the i+2th sampling processing unit... by managing the SPI communication interface connecting itself to the second isolation module G2 and communicating with the first daisy chain.. The Nth sampling processing unit M _N transmits the i+1th sampling processing unit to the Nth sampling processing unit M _n through multiple lines between the i+1th sampling processing unit and the second isolation module G2 in the first daisy chain The state data of the plurality of cell units corresponding to the plurality of sampling processing units is sent to the controller C, and i is a positive integer less than N.

其中，第一菊花链中第一隔离模块 G1 和第 i采样处理单元之间的多个线路包括：第一菊花链中第一隔离模块 G1与第 1采样处理单元 Mi之间的线路、第一菊花链中第 1采样处理单元 Mi与第 2采样处理单元 M₂之间的线路 ... ... .以及第一菊花链中第 i-1采样处理单元 Mw与第 i采样处理单元 Mi之间的线路。 Wherein, the multiple lines between the first isolation module G1 and the i-th sampling processing unit in the first daisy chain include: the line between the first isolation module G1 and the first sampling processing unit Mi in the first daisy chain, the first The line between the first sampling processing unit Mi and the second sampling processing unit M ₂ in the daisy chain... and the one between the i-1th sampling processing unit Mw and the i-th sampling processing unit Mi in the first daisy chain Between the lines.

第一菊花链中第 i+1采样处理单元和第二隔离模块 G2之间的多个线路包括：第一菊花链中第 i+1 采样处理单元 M_i+1与第 i+2采样处理单元 M_i+2之间的线路、第一菊花链中第 i+2采样处理单元 M_i+2与第 i+3采样处理单元 M_i+3之间的线路 .以及第一菊花链中第 N采样处理单元 M_N与第二隔离模块 G2之间的线路。 The multiple lines between the i+1th sampling processing unit and the second isolation module G2 in the first daisy chain include: the i+1th sampling processing unit M _i+1 and the i+2th sampling processing unit in the first daisy chain The line between Mi ₊₂ , the line between the i+2th sampling processing unit Mi ₊₂ and the i+3th sampling processing unit Mi ₊₃ in the first daisy chain. And the Nth line in the first daisy chain M _N line between the second isolation module G2 sampling processing unit.

也就是说，在第一菊花链中任意相邻两个采样处理单元的之间的线路出现单点故障时，控制器 C通过配置自身与第一菊花链通信的两个 SPI通信接口，将具有环形通信回路的第一菊花链转化为两条菊花链单链进行通信。从而避免米样电路的通信中断，提高了米样电路的可靠性。其中，第 1采样处理单元 Mi至第 i采样处理单元中多个采样处理单元对应的多个电芯单元的状态数据，即为第 1采样处理单元 M_b 第 2采样处理单元 M₂... ...以及第 i采样处理单元等 i个采样处理单元中所有电芯单元的所有状态数据。 That is to say, when a single point of failure occurs in the line between any two adjacent sampling processing units in the first daisy chain, the controller C will have two SPI communication interfaces for communicating with the first daisy chain by configuring itself The first daisy chain of the circular communication loop is transformed into two single daisy chains for communication. Therefore, the communication interruption of the sample circuit is avoided, and the reliability of the sample circuit is improved. Among them, the state data of the multiple cell units corresponding to the multiple sampling processing units from the first sampling processing unit Mi to the i-th sampling processing unit is the first sampling processing unit M _{b and} the second sampling processing unit M ₂ ... ...And all the status data of all battery cells in i sampling processing units, such as the i-th sampling processing unit.

其中，第 i+1采样处理单元至第 N采样处理单元 ^^中多个采样处理单元对应的多个电芯单元的状态数据，即为第 i+1采样处理单元、第 i+2 采样处理单元 ... ...第 N采样处理单元 ^^等 N-i个采样处理单元中所有电芯单元的所有状态数据。 Among them, the state data of the multiple cell units corresponding to the multiple sampling processing units in the (i+1)th sampling processing unit to the Nth sampling processing unit ^^ are the (i+1)th sampling processing unit and the (i+2)th sampling processing unit. Unit... All status data of all battery cell units in the Nth sampling processing unit^^ and other Ni sampling processing units.

与线路 A2 出现故障相类似，当第二菊花链中第 i采样处理单元与第 i+1采样处理单元之间的线路 B2出现故障的情况下，控制器 C通过管理自身与第一隔离模块 G1连接、且与第二菊花链通信的 SPI通信接口，控制第 1采样处理单元 Mi、第 2采样处理单元 M₂... ...以及第 i采样处理单元Similar to the failure of line A2, when the line B2 between the i-th sampling processing unit and the i+1-th sampling processing unit in the second daisy chain fails, the controller C manages itself and the first isolation module G1 The SPI communication interface connected to and communicated with the second daisy chain controls the first sampling processing unit Mi, the second sampling processing unit M ₂ ... and the i-th sampling processing unit

Mi通过第二菊花链中第一隔离模块 G1和第 i采样处理单元之间的多个线路传输第 1采样处理单元 Mi至第 i采样处理单元 Mi中多个采样处理单元对应的多个电芯单元的状态数据中的第二最大值和第二最小值至控制器 C。 Mi transmits multiple cells corresponding to multiple sampling processing units in the first sampling processing unit Mi to the ith sampling processing unit Mi through multiple lines between the first isolation module G1 and the i-th sampling processing unit in the second daisy chain The second maximum value and the second minimum value in the status data of the unit are sent to the controller C.

并且，控制器 C还通过管理自身与第二隔离模块 G2连接、且与第二菊花链通信的 SPI通信接口，控制第 i+1采样处理单元、第 i+2采样处理单元 ... ...第 N采样处理单元 M_N通过第二菊花链中第 i+1采样处理单元和第二隔离模块 G2之间的多个线路传输第 i+1采样处理单元至第 N采样处理单元 M_n中多个采样处理单元对应的多个电芯单元的状态数据中的第三最大值和第三最小值至控制器 C。 In addition, the controller C also controls the i+1th sampling processing unit, the i+2th sampling processing unit... by managing the SPI communication interface connecting itself to the second isolation module G2 and communicating with the second daisy chain.. The Nth sampling processing unit M _N transmits the i+1th sampling processing unit to the Nth sampling processing unit M _n through multiple lines between the i+1th sampling processing unit and the second isolation module G2 in the second daisy chain The third maximum value and the third minimum value in the state data of the plurality of cell units corresponding to the plurality of sampling processing units are sent to the controller C.

其中，第二菊花链中第一隔离模块 G1 和第 i采样处理单元之间的多个线路包括：第二菊花链中第一隔离模块 G1与第 1采样处理单元 Mi之间的线路、第二菊花链中第 1采样处理单元 Mi与第 2采样处理单元 M₂之间的线路 ... ... .以及第二菊花链中第 i-1采样处理单元与第 i采样处理单元之间的线路。 Wherein, the multiple lines between the first isolation module G1 and the i-th sampling processing unit in the second daisy chain include: the line between the first isolation module G1 and the first sampling processing unit Mi in the second daisy chain, the second The line between the first sampling processing unit Mi and the second sampling processing unit M ₂ in the daisy chain... and the line between the i-1th sampling processing unit and the i-th sampling processing unit in the second daisy chain line.

第二菊花链中第 i+1采样处理单元和第二隔离模块 G2之间的多个线路包括：第二菊花链中第 i+1采样处理单元与第 i+2采样处理单元之间的线路、第二菊花链中第 i+2采样处理单元与第 i+3采样处理单元之间的线路 ... ... .以及第二菊花链中第 N采样处理单元 M_N与第二隔离模块 G2之间的线路。 The multiple lines between the i+1th sampling processing unit and the second isolation module G2 in the second daisy chain include: between the i+1th sampling processing unit and the i+2th sampling processing unit in the second daisy chain Line, the second in the daisy chain between the i + 2 line and the second sampling processing means sampling processing unit i + 3 ... ...., And the second in the daisy chain of N M _N sampling processing unit and the second isolation Line between module G2.

例如，控制器 C可以将第 1采样处理单元 Mi至第 i采样处理单元等 i 个采样处理单元中所有采样处理单元对应的所有电芯单元的状态数据中的第二最大值和第二最小值，与第 i+1 采样处理单元至第 N采样处理单元 M_N中所有采样处理单元对应的所有电芯单元的状态数据中的第三最大值和第三最小值进行比较，从而得出电池包 P中所有电芯单元的状态数据中的第一最大值和第一最小值。 For example, the controller C may determine the second maximum value and the second minimum value among the state data of all the cell units corresponding to all the sampling processing units in i sampling processing units, such as the first sampling processing unit Mi to the ith sampling processing unit , third maximum value of all the state data of the battery cell and the i + 1-sampling processing unit to the second processing unit M _N N samples of all sampling processing unit corresponding to the third minimum value and comparing the battery pack to arrive The first maximum value and the first minimum value in the state data of all cell units in P.

也就是说，第二最大值和第三最大值中更大的数值即为第一最大值，第二最小值和第三最小值中更小的数值即为第一最小值。 That is, the larger value of the second maximum value and the third maximum value is the first maximum value, and the smaller value of the second minimum value and the third minimum value is the first minimum value.

也就是说，在第二菊花链中任意相邻两个采样处理单元的之间的线路出现单点故障时，控制器 C通过配置自身与第二菊花链通信的两个 SPI通信接口，将具有环形通信回路的第二菊花链转化为两条菊花链单链进行通信。从而避免米样电路的通信中断，提高了米样电路的可靠性。 That is to say, when a single point of failure occurs in the line between any two adjacent sampling processing units in the second daisy chain, the controller C will have two SPI communication interfaces for communicating with the second daisy chain by configuring itself The second daisy chain of the circular communication loop is transformed into two single daisy chains for communication. Therefore, the communication interruption of the sample circuit is avoided, and the reliability of the sample circuit is improved.

值得一提的是，对于第一菊花链或第二菊花链，在采样电路转化为两条菊花链单链进行通信的情况下，由于不再是环形通信，两条菊花链单链各自均可发送控制指令，以及接收采样数据。 It is worth mentioning that for the first daisy chain or the second daisy chain, when the sampling circuit is converted into two daisy chain single chains for communication, since it is no longer a ring communication, each of the two daisy chain single chains can be used. Send control commands and receive sampled data.

4、当第一隔离模块 G1出现故障时，与线路 A1和线路 B 1 同时发生故障时的处理方法相类似，控制器 C通过管理与第二隔离模块 G2连接、且分别与第一菊花链和第二菊花链通信的两个 SPI通信接口，控制采样处理模块通过第一菊花链中第 1采样处理单元 M^P第二隔离模块 G2之间的多个线路传输电池包 P中多个电芯单元的状态数据至控制器 C; 以及控制采样处理模块通过第二菊花链中第 1采样处理单元 M^P第二隔离模块 G2 之间的多个线路传输第一最大值和第一最小值至控制器 C。 4. When the first isolation module G1 fails, similar to the processing method when the line A1 and the line B1 fail at the same time, the controller C is connected to the second isolation module G2 through management, and is respectively connected to the first daisy chain and The two SPI communication interfaces of the second daisy chain communication control the sampling processing module to transmit multiple cells in the battery pack P through multiple lines between the first sampling processing unit M^P and the second isolation module G2 in the first daisy chain The status data of the unit to the controller C; and control the sampling processing module to transmit the first maximum value and the first minimum value to the multiple lines between the first sampling processing unit M^P and the second isolation module G2 in the second daisy chain Controller C.

在一些示例中，当第二隔离模块 G2出现故障时，与线路 A3和线路 B3 同时发生故障时的处理方法相类似，控制器 C通过管理与第一隔离模块 G1连接、且分别与第一菊花链和第二菊花链通信的两个 SPI通信接口，控制采样处理模块 M通过第一菊花链中第一隔离模块 G1和第 N采样处理单元 M_N之间的多个线路传输电池包 p中多个电芯单元的状态数据至控制器 C; 以及控制采样处理模块通过第二菊花链中第一隔离模块 G1 和第 N采样处理单元 M_N 2间的多个线路传输第一最大值和第一最小值至控制器 C。 In some examples, when the second isolation module G2 fails, similar to the processing method when the line A3 and the line B3 fail at the same time, the controller C is connected to the first isolation module G1 through management, and is connected to the first isolation module G1 respectively. The two SPI communication interfaces for communication between the first daisy chain and the second daisy chain control the sampling processing module M through the first isolation module G1 and the Nth sampling in the first daisy chain P status data in the plurality of cell units a plurality of transmission lines between the battery pack M _N processing units to the controller C; and a control sample module by a second module daisy chain in a first spacer G1 and the N-sampling processing unit The multiple lines between M _N 2 transmit the first maximum value and the first minimum value to the controller C.

5、当控制器 C检测到第一菊花链同时出现多个故障的情况下，例如，线路 A1和线路 A2同时出现故障，控制器 C可以控制采样处理模块 M通过第二菊花链传输电池包 P中多个电芯单元的状态数据至控制器 C。比如，控制器 C可以通过控制自身与第一隔离模块 G1连接、且与第二菊花链通信的 SPI通信接口，控制采样处理模块 M通过第二菊花链传输电池包 P中多个电芯单元的状态数据至控制器 C。 5. When the controller C detects that the first daisy chain has multiple faults at the same time, for example, the line A1 and the line A2 have faults at the same time, the controller C can control the sampling processing module M to transmit the battery pack P through the second daisy chain The status data of multiple cell units in the middle is sent to the controller C. For example, the controller C can control the SPI communication interface connected to the first isolation module G1 and communicate with the second daisy chain to control the sampling processing module M to transmit the data of the multiple cell units in the battery pack P through the second daisy chain. State data to controller C.

在本申请的实施例中，环状菊花链通信结构弥补了单链菊花链的缺点，当环状菊花链任意一处失效后，能自动形成单链的菊花链继续完成通信，这种做法大大提高了菊花链通信的可靠性。 In the embodiment of the present application, the ring-shaped daisy-chain communication structure makes up for the shortcomings of the single-chain daisy chain. When any part of the ring-shaped daisy chain fails, a single-chain daisy chain can be automatically formed to continue communication. This approach greatly Improve the reliability of daisy chain communication.

图 3示出本申请另一些实施例中采样电路的结构示意图。与图 2不同的是，图 3中的开关模块 K与电池包的负极连接。 Fig. 3 shows a schematic diagram of the structure of a sampling circuit in other embodiments of the present application. The difference from Figure 2 is that the switch module K in Figure 3 is connected to the negative electrode of the battery pack.

图 4示出本申请另一些实施例中采样电路的结构示意图。与图 2不同的是，图 3中的开关模块 K包括开关单元 K1和开关单元 K2。其中，开关单元 K1与电池包的负极连接，开关单元 K2与电池包的正极连接。也就是说，开关模块 K既可以与电池包的正极连接，也可以与电池包的负极连接。当开关模块 K包括两个开关单元时，控制器可以发送断开至少一个开关单元的断开指令，以及时处理电池包的异常。 Fig. 4 shows a schematic diagram of the structure of sampling circuits in other embodiments of the present application. The difference from Fig. 2 is that the switch module K in Fig. 3 includes a switch unit K1 and a switch unit K2. Among them, the switch unit K1 is connected to the negative electrode of the battery pack, and the switch unit K2 is connected to the positive electrode of the battery pack. In other words, the switch module K can be connected to the positive pole of the battery pack or the negative pole of the battery pack. When the switch module K includes two switch units, the controller can send a disconnection instruction to disconnect at least one switch unit, and handle the abnormality of the battery pack in time.

图 5示出本申请实施例提供的采样电路的控制方法 500的流程示意图。如图 5所示，本申请实施例提供的采样电路的控制方法包括以下步骤： FIG. 5 shows a schematic flowchart of a method 500 for controlling a sampling circuit provided by an embodiment of the present application. As shown in FIG. 5, the control method of the sampling circuit provided in the embodiment of the present application includes the following steps:

S510, 控制器接收通过第二菊花链传输的第一最大值和第一最小值。 S510: The controller receives the first maximum value and the first minimum value transmitted through the second daisy chain.

S520, 控制器根据第一最大值和 /或第一最小值，判断电池包是否出现异常。 S520: The controller determines whether the battery pack is abnormal according to the first maximum value and/or the first minimum value.

在本申请的实施例中，当控制器接收到第一最大值和第一最小值后，可根据第一最大值和第一最小值对应的预设阈值，判断电池包是否发生异常。由于第二菊花链可以快速的传输第一最大值和第一最小值，因此可以提高对电池包异常状况判断的及时性。 In the embodiment of the present application, after the controller receives the first maximum value and the first minimum value, it can determine whether the battery pack is abnormal according to the preset threshold corresponding to the first maximum value and the first minimum value. Often. Since the second daisy chain can quickly transmit the first maximum value and the first minimum value, the timeliness of determining the abnormal condition of the battery pack can be improved.

在本申请的实施例中，采样电路的控制方法还包括： In the embodiment of the present application, the control method of the sampling circuit further includes:

S530, 若控制器确定第一最大值大于第一预设阈值和 /或第一最小值小于第二预设阈值，则发送断开指令至开关模块，控制开关模块从闭合状态转换为断开状态，以切断电池包所在主回路。 S530: If the controller determines that the first maximum value is greater than the first preset threshold and/or the first minimum value is less than the second preset threshold, it sends an open command to the switch module to control the switch module to switch from the closed state to the open state , To cut off the main circuit where the battery pack is located.

当控制器发现第一最大值和 /或第一最小值达到对应的预设阈值时，则立即控制开关模块处于断开状态，以避免电池包异常所引起的问题。 When the controller finds that the first maximum value and/or the first minimum value reach the corresponding preset threshold value, it immediately controls the switch module to be in an off state, so as to avoid problems caused by abnormal battery packs.

S540, 若第一菊花链出现多个故障，控制器控制采样处理模块通过第二菊花链传输电池包中多个电芯单元的状态数据至控制器。 S540: If multiple failures occur in the first daisy chain, the controller controls the sampling processing module to transmit the state data of the multiple cell units in the battery pack to the controller through the second daisy chain.

通过利用第二菊花链作为备用链路传输电池包中多个电芯单元的状态数据，可以避免电池包所有电芯单元状态数据的丢失，提高了采样电路的通信可靠性。 By using the second daisy chain as a backup link to transmit the status data of the multiple cell units in the battery pack, the loss of the status data of all the cell units in the battery pack can be avoided, and the communication reliability of the sampling circuit is improved.

在本申请的实施例中，采样电路的控制方法还包括当第一菊花链或第二菊花链出现单点故障，以及第一隔离模块 G1或第二隔离模块 G2出现故障时的控制方法，具体可参见采样电路的实施例的相关叙述，在此不再赘述。 In the embodiment of the present application, the control method of the sampling circuit further includes a control method when a single point of failure occurs in the first daisy chain or the second daisy chain, and when the first isolation module G1 or the second isolation module G2 fails, specifically Please refer to the relevant description of the embodiment of the sampling circuit, which will not be repeated here.

还需要说明的是，本申请中提及的示例性实施例，基于一系列的步骤或者装置描述一些方法或***。但是，本申请不局限于上述步骤的顺序，也就是说，可以按照实施例中提及的顺序执行步骤，也可以不同于实施例中的顺序，或者若干步骤同时执行。 It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the foregoing steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be different from the order in the embodiments, or several steps may be performed simultaneously.

虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。 Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it without departing from the scope of the present application and the components therein can be replaced with equivalents. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any manner. This application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

权利要求书 Claims

1、一种采样电路，其中，所述电路包括：采样处理模块、控制器以及与所述控制器连接的第一隔离模块和第二隔离模块；其中， 1. A sampling circuit, wherein the circuit includes: a sampling processing module, a controller, and a first isolation module and a second isolation module connected to the controller; wherein,

所述第一隔离模块、所述采样处理模块和所述第二隔离模块依次串联形成第一菊花链，且所述第一隔离模块、所述采样处理模块和所述第二隔离模块依次串联还形成第二菊花链； The first isolation module, the sampling processing module, and the second isolation module are sequentially connected in series to form a first daisy chain, and the first isolation module, the sampling processing module, and the second isolation module are sequentially connected in series. Form a second daisy chain;

所述采样处理模块用于采集电池包中多个电芯单元的状态数据并在采集到的多个电芯单元的状态数据中，确定第一最大值和第一最小值； The sampling processing module is used to collect state data of a plurality of battery cell units in the battery pack and determine the first maximum value and the first minimum value among the collected state data of the plurality of battery cell units;

所述第一菊花链用于将所述电池包中多个电芯单元的状态数据传输至所述控制器，所述第二菊花链用于将所述第一最大值和所述第一最小值传输至所述控制器； The first daisy chain is used to transmit the status data of a plurality of battery cells in the battery pack to the controller, and the second daisy chain is used to combine the first maximum value and the first minimum value. Value is transmitted to the controller;

所述控制器用于基于所述第一最大值和 /或所述第一最小值，判断所述电池包是否出现异常。 The controller is configured to determine whether the battery pack is abnormal based on the first maximum value and/or the first minimum value.

2、根据权利要求 1所述的电路，其中，所述电路还包括： 2. The circuit according to claim 1, wherein the circuit further comprises:

开关模块，分别与所述电池包和所述控制器连接； A switch module, respectively connected to the battery pack and the controller;

所述控制器用于当所述第一最大值大于第一预设阈值和 /或所述第一最小值小于第二预设阈值时，发送断开指令至所述开关模块； The controller is configured to send a disconnection instruction to the switch module when the first maximum value is greater than a first preset threshold and/or the first minimum value is less than a second preset threshold;

所述开关模块，用于基于所述断开指令从闭合状态转换为断开状态，以切断所述电池包所在主回路。 The switch module is configured to switch from a closed state to an open state based on the open command, so as to cut off the main circuit where the battery pack is located.

3、根据权利要求 2所述的电路，其中，所述开关模块与所述电池包的正极和 /或所述电池包的负极连接。 3. The circuit according to claim 2, wherein the switch module is connected to the positive electrode of the battery pack and/or the negative electrode of the battery pack.

4、根据权利要求 1 所述的电路，其中，所述控制器用于在所述第一菊花链出现多个故障的情况下，控制所述采样处理模块通过所述第二菊花链传输所述电池包中多个电芯单元的状态数据至所述控制器。 4. The circuit according to claim 1, wherein the controller is configured to control the sampling processing module to transmit the battery through the second daisy chain when multiple failures occur in the first daisy chain State data of a plurality of battery cells in the package is sent to the controller.

5、根据权利要求 1 所述的电路，其中，所述采样处理模块包括第 1 采样处理单元、第 2采样处理单元 ... ...第 N采样处理单元，所述第一隔离模块、所述第 1采样处理单元、所述第 2采样处理单元 ... ...所述第 N采样处理单元和所述第二隔离模块依次串联形成所述第一菊花链，且所述第一隔离模块、所述第 1采样处理单元、所述第 2采样处理单元 ... ...所述第 N 采样处理单元和所述第二隔离模块依次串联还形成所述第二菊花链； 5. The circuit according to claim 1, wherein the sampling processing module includes a first sampling processing unit, a second sampling processing unit... an Nth sampling processing unit, the first isolation module, the The first sampling processing unit, the second sampling processing unit... The Nth sampling processing unit and the second isolation module are sequentially connected in series to form the first daisy chain, and the first An isolation module, the first sampling processing unit, the second sampling processing unit... the Nth sampling processing unit and the second isolation module are connected in series to form the second daisy chain;

每个采样处理单元用于采集所述电池包中与该采样处理单元对应的每个电芯单元的状态数据； Each sampling processing unit is used to collect state data of each battery cell corresponding to the sampling processing unit in the battery pack;

所述控制器用于当所述第一菊花链中所述第一隔离模块和所述第 1采样处理单元之间的线路出现故障的情况下，控制所述采样处理模块通过所述第一菊花链中所述第 1采样处理单元和所述第二隔离模块之间的多个线路传输所述电池包中多个电芯单元的状态数据至所述控制器； The controller is configured to control the sampling processing module to pass through the first daisy chain when the line between the first isolation module and the first sampling processing unit in the first daisy chain fails The multiple lines between the first sampling processing unit and the second isolation module transmit the state data of the multiple cell units in the battery pack to the controller;

所述控制器用于当所述第一菊花链中所述第二隔离模块和所述第 N采样处理单元之间的线路出现故障的情况下，控制所述采样处理模块通过所述第一菊花链中所述第一隔离模块和所述第 N采样处理单元之间的多个线路传输所述电池包中多个电芯单元的状态数据至所述控制器。 The controller is configured to control the sampling processing module to pass through the first daisy chain when the line between the second isolation module and the Nth sampling processing unit in the first daisy chain fails The multiple lines between the first isolation module and the Nth sampling processing unit transmit the state data of the multiple cell units in the battery pack to the controller.

6、根据权利要求 5所述的电路，其中，所述控制器用于当所述第二菊花链中所述第一隔离模块和所述第 1采样处理单元之间的线路出现故障的情况下，控制所述采样处理模块通过所述第二菊花链中所述第 1采样处理单元和所述第二隔离模块之间的多个线路传输所述第一最大值和所述第一最小值至所述控制器； 6. The circuit according to claim 5, wherein the controller is configured to: when a line between the first isolation module and the first sampling processing unit in the second daisy chain fails, Control the sampling processing module to transmit the first maximum value and the first minimum value to all lines through the multiple lines between the first sampling processing unit and the second isolation module in the second daisy chain The controller;

所述控制器用于当所述第二菊花链中所述第二隔离模块和所述第 N采样处理单元之间的线路出现故障的情况下，控制所述采样处理模块通过所述第二菊花链中所述第一隔离模块和所述第 N采样处理单元之间的多个线路传输所述第一最大值和所述第一最小值至所述控制器。 The controller is configured to control the sampling processing module to pass through the second daisy chain when the line between the second isolation module and the Nth sampling processing unit in the second daisy chain fails The multiple lines between the first isolation module and the Nth sampling processing unit transmit the first maximum value and the first minimum value to the controller.

7、根据权利要求 5所述的电路，其中，所述控制器用于当所述第一菊花链中第 i采样处理单元与第 i+1采样处理单元之间的线路出现故障的情况下，控制所述第 1采样处理单元、所述第 2采样处理单元 ... ...以及所述第 i采样处理单元通过所述第一菊花链中所述第一隔离模块和所述第 i 采样处理单元之间的多个线路，传输所述第 1采样处理单元至所述第 i采样处理单元中多个采样处理单元对应的多个电芯单元的状态数据至所述控制器；以及控制所述第 i+l采样处理单元、第 i+2采样处理单元 ... ...所述第7. The circuit according to claim 5, wherein the controller is configured to control when the line between the i-th sampling processing unit and the (i+1)-th sampling processing unit in the first daisy chain fails The first sampling processing unit, the second sampling processing unit... and the i-th sampling processing unit are processed through the first isolation module and the i-th sampling in the first daisy chain Multiple lines between the units to transmit state data of multiple cell units corresponding to multiple sampling processing units in the first sampling processing unit to the i-th sampling processing unit to the controller; And controlling the i+1th sampling processing unit, the i+2th sampling processing unit...the

N采样处理单元通过所述第一菊花链中所述第 i+l 采样处理单元和所述第二隔离模块之间的多个线路，传输所述第 i+l采样处理单元至所述第 N采样处理单元中多个采样处理单元对应的多个电芯单元的状态数据至所述控制器， i为小于 N的正整数。 The N sampling processing unit transmits the i+1th sampling processing unit to the Nth sampling processing unit through multiple lines between the i+1th sampling processing unit and the second isolation module in the first daisy chain The state data of the multiple cell units corresponding to the multiple sampling processing units in the sampling processing unit is sent to the controller, and i is a positive integer less than N.

8、根据权利要求 5所述的电路，其中，所述控制器用于当所述第二菊花链中第 i采样处理单元与第 i+l采样处理单元之间的线路出现故障的情况下，控制所述第 1采样处理单元、所述第 2采样处理单元 ... ...以及所述第 i采样处理单元通过所述第二菊花链中所述第一隔离模块和所述第 i 采样处理单元之间的多个线路，传输所述第 1采样处理单元至所述第 i采样处理单元中多个采样处理单元对应的多个电芯单元的状态数据中的第二最大值和第二最小值至所述控制器； 8. The circuit according to claim 5, wherein the controller is configured to control when the line between the i-th sampling processing unit and the i+1-th sampling processing unit in the second daisy chain fails The first sampling processing unit, the second sampling processing unit... and the i-th sampling processing unit process the first isolation module and the i-th sampling in the second daisy chain The multiple lines between the units transmit the second maximum value and the second minimum in the state data of the multiple cell units corresponding to the multiple sampling processing units in the i-th sampling processing unit Value to the controller;

以及控制第 i+l采样处理单元、第 i+2采样处理单元 ... ...所述第 N采样处理单元通过所述第二菊花链中所述第 i+l 采样处理单元和所述第二隔离模块之间的多个线路传输所述第 i+l采样处理单元至所述第 N采样处理单元中多个采样处理单元对应的多个电芯单元的状态数据中的第三最大值和第三最小值至所述控制器。 And controlling the i+1th sampling processing unit, the i+2th sampling processing unit... the Nth sampling processing unit passes through the i+1th sampling processing unit and the second daisy chain The multiple lines between the second isolation modules transmit the third maximum value among the state data of the multiple cell units corresponding to the multiple sampling processing units from the i+1th sampling processing unit to the Nth sampling processing unit And the third minimum value to the controller.

9、根据权利要求 5所述的电路，其中，所述控制器用于在所述第一隔离模块出现故障的情况下，控制所述采样处理模块通过所述第一菊花链中所述第 1采样处理单元和所述第二隔离模块之间的多个线路传输所述电池包中多个电芯单元的状态数据至所述控制器；以及控制所述采样处理模块通过所述第二菊花链中所述第 1采样处理单元和所述第二隔离模块之间的多个线路传输所述第一最大值和所述第一最小值至所述控制器； 9. The circuit according to claim 5, wherein the controller is configured to control the sampling processing module to pass the first sampling in the first daisy chain when the first isolation module fails. The multiple lines between the processing unit and the second isolation module transmit the status data of the multiple cell units in the battery pack to the controller; and control the sampling processing module to pass through the second daisy chain Multiple lines between the first sampling processing unit and the second isolation module transmit the first maximum value and the first minimum value to the controller;

所述控制器用于在所述第二隔离模块出现故障的情况下，控制所述采样处理模块通过所述第一菊花链中所述第一隔离模块和所述第 N采样处理单元之间的多个线路传输所述电池包中多个电芯单元的状态数据至所述控制器；以及控制所述采样处理模块通过所述第二菊花链中所述第一隔离模块和所述第 N采样处理单元之间的多个线路传输所述第一最大值和所述第一最小值至所述控制器。 The controller is configured to control the sampling processing module to pass the multiple data between the first isolation module and the Nth sampling processing unit in the first daisy chain when the second isolation module fails. A line to transmit the status data of the multiple cell units in the battery pack to the controller; and control the sampling processing module to process the first isolation module and the Nth sampling process in the second daisy chain Multiple lines between units transmit the first maximum value and the first minimum value to the controller.

10、一种采样电路的控制方法，其中，应用于如权利要求 1所述的采样电路，所述采样电路的控制方法，包括： 10. A control method of a sampling circuit, wherein, applied to the sampling circuit according to claim 1, the control method of the sampling circuit includes:

所述控制器接收通过所述第二菊花链传输的所述第一最大值和所述第一最小值； The controller receives the first maximum value and the first minimum value transmitted through the second daisy chain;

所述控制器根据所述第一最大值和 /或所述第一最小值，判断所述电池包是否出现异常。 The controller determines whether the battery pack is abnormal according to the first maximum value and/or the first minimum value.

1 1、根据权利要求 10所述的方法，其中，所述采样电路还包括：开关模块，分别与所述电池包和所述控制器连接； 11. The method according to claim 10, wherein the sampling circuit further comprises: a switch module, respectively connected to the battery pack and the controller;

其中，所述方法还包括： Wherein, the method further includes:

若所述控制器确定所述第一最大值大于第一预设阈值和 /或所述第一最小值小于第二预设阈值，则发送断开指令至所述开关模块，控制所述开关模块从闭合状态转换为断开状态，以切断所述电池包所在主回路。 If the controller determines that the first maximum value is greater than the first preset threshold value and/or the first minimum value is less than the second preset threshold value, it sends a disconnection instruction to the switch module to control the switch module Switch from the closed state to the open state to cut off the main circuit where the battery pack is located.

12、根据权利要求 10所述的方法，其中，所述方法还包括：若所述第一菊花链出现多个故障，所述控制器控制所述采样处理模块通过所述第二菊花链传输所述电池包中多个电芯单元的状态数据至所述控制器。 12. The method according to claim 10, wherein the method further comprises: if multiple failures occur in the first daisy chain, the controller controls the sampling processing module to transmit the data through the second daisy chain. State data of a plurality of battery cells in the battery pack is sent to the controller.