Collection device and battery

Abstract

The utility model relates to an acquisition device and a battery, the acquisition device comprises a connector, a main body circuit and a branch circuit, and the main body circuit is formed by coating a plurality of wires which are arranged in parallel and at intervals with a first insulating film layer. The main body circuit comprises two acquisition sections and two folding sections correspondingly connected with the two acquisition sections, the acquisition sections extend in the same direction and form avoiding spaces at intervals in the width directions of the acquisition sections, and the folding sections are oppositely folded relative to the acquisition sections connected with the folding sections and are connected with the connector. Each acquisition section is correspondingly connected with a plurality of branch circuits, each branch circuit is welded with different wires at the acquisition section, and all the branch circuits are arranged on two opposite sides of the two acquisition sections in the width direction. According to the technical scheme of the embodiment, the avoiding space between the two collecting sections is used for avoiding the anti-explosion valve, and the risks of short circuit or arc discharge and the like caused by the fact that high-temperature flue gas impacts a main circuit when the anti-explosion valve releases pressure are prevented.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to data acquisition devices and batteries. Background Technology

[0002] The power battery is a key component of electric vehicles, and its performance and cost directly affect the large-scale application of electric vehicles. Power batteries typically consist of multiple individual cells connected in series and / or parallel to form a group to meet voltage and power requirements. Inside the power battery, data acquisition devices collect data such as temperature and voltage from each individual cell to monitor the battery's status.

[0003] The data acquisition device typically includes a main circuit and multiple branch circuits. Each branch circuit is used to make thermal and / or electrical connections with the terminals of each battery cell in the group to acquire data such as voltage and temperature of the battery cells. The main circuit is connected to all the branch circuits to transmit the acquired data to the outside.

[0004] For certain types of battery cells, the positive terminal, negative terminal, and explosion-proof valve are located on the same side, with the explosion-proof valve positioned between the positive and negative terminals. When these battery cells are assembled into a group, the main circuitry of the data acquisition device is located above the explosion-proof valve. When thermal runaway is triggered, the high-temperature gas flow exiting from the battery cell will directly impact the main circuitry, potentially causing short circuits or arcing. Utility Model Content

[0005] Based on this, a data acquisition device and battery are provided that can avoid the impact of high-temperature airflow on the data acquisition device and reduce the risk of short circuits or arcing.

[0006] In a first aspect, this application provides a data acquisition device, comprising:

[0007] Connector;

[0008] The main circuit is composed of a plurality of parallel and spaced wires covered by a first insulating film layer; the main circuit includes two acquisition segments and two folding segments corresponding to the two acquisition segments. Each acquisition segment extends in the same direction and is spaced apart from each other in its own width direction to form a clearance space. Each folding segment is folded relative to the acquisition segment it is connected to and is connected to the connector.

[0009] Each acquisition segment is connected to a plurality of branch circuits, each branch circuit is welded to a different wire at the acquisition segment, and all the branch circuits are arranged on opposite sides of the two acquisition segments in the width direction.

[0010] In some embodiments, each of the folded segments includes N folded sub-segments that are folded and connected in sequence, wherein one of the folded sub-segments located at the end is folded and connected to the acquisition segment, and another folded sub-segment located at the end is connected to the connector, and N≥2.

[0011] In some embodiments, starting from the folded sub-segments connected to the acquisition segment, N folded sub-segments of one of the folded segments are sequentially folded toward one side in the thickness direction of the acquisition segment, and N folded sub-segments of another folded segment are sequentially folded toward the other side in the thickness direction of the acquisition segment.

[0012] In some embodiments, the main circuit and all the branch circuits are arranged symmetrically with respect to the same symmetry plane, which is parallel to the extension direction of the acquisition segment.

[0013] In some embodiments, all of the branch circuits are arranged on the same side in the thickness direction corresponding to the acquisition segment.

[0014] In some embodiments, the cross-section of the conductor has a dimension in the width direction of the acquisition segment that is greater than its dimension in the thickness direction of the acquisition segment.

[0015] In some embodiments, on each acquisition segment, in the order in which all the branch circuits are arranged sequentially along the extension direction of the acquisition segment, each branch circuit is sequentially soldered to each of the wires along the width direction of the acquisition segment.

[0016] In some embodiments, the wires are arranged at intervals along the width direction of the acquisition segment, and a first cutout is provided on the first insulating film layer corresponding to each wire. The first cutouts are staggered in both the extension direction and the width direction of the acquisition segment, and the branch circuit is soldered to the wires exposed by the first cutouts.

[0017] In some embodiments, at least a portion of the wire is provided with a cut-out, and in the extension direction of the wire, the first cut-out exposing the wire is disposed near the connector relative to the cut-out.

[0018] In some embodiments, the spacing W between adjacent conductors in the width direction satisfies: 0.5mm ≤ W ≤ 0.8mm.

[0019] In some embodiments, the dimension d of each of the wires in the width direction and the diameter D of each of the cuts satisfy: d+1 / 2*W≤D≤(d+W).

[0020] In some embodiments, the branch circuit is composed of a conductive layer covered by a second insulating film layer. The branch circuit is divided into a connected welding area and a collection area. The conductive layer of the welding area is provided with welding positions. The second insulating film layer of the welding area is provided with a second cutout corresponding to the welding position. The welding position exposed by the second cutout is welded to the wire. The conductive layer of the collection area is used to connect to the busbar.

[0021] In some embodiments, the branch circuit is further divided into a buffer zone, which is elastically deformable and connects the welding area and the acquisition area.

[0022] In some embodiments, a protective layer is provided on the branch circuit and the acquisition segment in the area corresponding to the welding position of the welding point and the welding position of the wire.

[0023] In some embodiments, the conductive layer is a metal foil layer.

[0024] In some embodiments, the conductive layer of the buffer contains a fuse segment.

[0025] In some embodiments, the second insulating film layer of the acquisition area is provided with a perforated window, and a welding metal sheet is provided at the perforated window. The welding metal sheet is welded to the conductive layer for welding the busbar.

[0026] In some embodiments, the welding position is provided with a welding hole that extends through the thickness direction of the welding area, and the solder passes through the welding hole to connect the welding position to the wire.

[0027] In some embodiments, each welding area is provided with multiple rows of welding positions, and a second cutout is provided for each row of welding positions. The number of rows of welding positions is the same as the number of wires included in each acquisition segment. The arrangement position of each row of welding positions along the width direction of the acquisition segment is different, and different branch circuits are welded to the corresponding wires via welding positions arranged in different positions.

[0028] In some embodiments, the connector includes two sets of pins, each set of pins being electrically connected to one of the folded segments;

[0029] Each of the pins is provided with multiple spikes. All the spikes pierce the first insulating film layer of the folded segment along the thickness direction of the corresponding folded segment, and bend and hug the same wire within the folded segment. The spikes of different pins hug different wires.

[0030] In some embodiments, the plurality of pawls on the same pin are divided into two groups, the two groups of pawls are spaced apart in the width direction of the folded section, and all the pawls are staggered along the extension direction of the folded section.

[0031] In some embodiments, the pawls on the pins of different groups are oriented in opposite directions along the thickness direction of the folded segment.

[0032] Secondly, this application provides a battery, comprising:

[0033] Multiple battery cells, each of which has a positive terminal, a negative terminal, and an explosion-proof valve on one side in the height direction, with the explosion-proof valve located between the positive terminal and the negative terminal;

[0034] The acquisition device described in any of the above embodiments is connected in such way as the branch circuit of one of the acquisition segments to the positive or negative terminal located on the same side of the plurality of explosion-proof valves, and the branch circuit of another acquisition segment to the positive or negative terminal located on the same other side of the plurality of explosion-proof valves, wherein the explosion-proof valve is located in the clearance space.

[0035] In some embodiments, all of the branch circuits are arranged on one side of the battery cell in the thickness direction corresponding to the acquisition segment.

[0036] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0037] The aforementioned data acquisition device and battery divide the main circuit into two acquisition sections and two folding sections. The clearance space between the two acquisition sections avoids the explosion-proof valve, preventing high-temperature fumes from impacting the main circuit and causing short circuits or arcing when the valve depressurizes. Simultaneously, the folding sections connect the acquisition sections and the connector, with each folding section connected to the same connector. In the width direction of the acquisition sections, the connector is roughly positioned between the two acquisition sections, reducing the space occupied by the data acquisition device. Attached Figure Description

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0039] Figure 1 This is a schematic diagram of the acquisition device in some embodiments.

[0040] Figure 2 for Figure 1 The diagram shows the application of the data collection device on a battery.

[0041] Figure 3 for Figure 2 Another view of the structure shown.

[0042] Figure 4 for Figure 1 A partial structural diagram of the data acquisition device is shown.

[0043] Figure 5 for Figure 1 A partial structural perspective view of the data acquisition device shown.

[0044] Figure 6 for Figure 5 The diagram shown is a schematic of the structure with the first insulating film layer hidden.

[0045] Figure 7 for Figure 6 Another view of the structure shown.

[0046] Figure 8 This is a schematic diagram of the structure of the second insulating film layer in some embodiments.

[0047] Figure 9 This is a schematic diagram of the structure of the conductive layer in some embodiments.

[0048] Figure 10 This is a schematic diagram of the structure of the second insulating film layer in some other embodiments.

[0049] Figure 11 for Figure 1 A partially enlarged schematic diagram of the data acquisition device shown.

[0050] The reference numerals in the detailed embodiments are as follows:

[0051] 1000, Battery; X, First direction; Y, Second direction; Z, Third direction; 100, Acquisition device; 10, Connector; 11, Pin; 11k, Grip; 20, Main circuit; 20a, Acquisition section; a1, Clearance space; 20b, Folding section; b1, Folding sub-segment; 21, First insulating film layer; 21b, First cutout; 22, Wire; 22e, Cutout; 30, Branch circuit; 30f, Welding area; f1, Welding position;

[0052] f2, welding hole; 30g, buffer zone; g1, fuse section; 30h, acquisition area; h1, perforated window; 31, second insulating film layer; 31j, second perforated opening; 32, conductive layer; 200, battery cell; 201, explosion-proof valve; 300, busbar. Detailed Implementation

[0053] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0054] In the description of this application, it should be understood that, where they appear, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0055] Furthermore, where applicable, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," "fixing," etc., shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] It should be noted that, if an element is described as "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is described as "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0059] To address the aforementioned technical problems, this application provides a data acquisition device and a battery.

[0060] The battery described in this application includes multiple battery cells, which are the smallest units in the battery where electrochemical reactions take place. A battery cell can be a secondary battery or a primary battery. A battery cell can be a lithium-ion battery, a sodium-ion battery, a lithium-ion battery, or a magnesium-ion battery, but is not limited to these. A battery cell can be cylindrical, flat, cuboid, prism, or other shapes.

[0061] In some embodiments, the battery cell includes a housing, an end cap, and an electrode assembly. The housing and the end cap together form an internal space for accommodating the electrode assembly. Specifically, a receiving cavity may be formed within the housing, with at least one end open. The end cap closes to the open end of the housing to seal the receiving cavity, and the electrode assembly is mounted within the receiving cavity. The housing may be, but is not limited to, a metal housing, such as an aluminum housing or a steel housing.

[0062] Electrode assemblies typically include a positive electrode, a negative electrode, and a separator separating the positive and negative electrodes. An electrolyte can be injected into the battery cell, allowing it to penetrate the electrode assembly and provide ion migration pathways for electrochemical reactions, as well as conductivity. Electrode assemblies can be in the form of wound, stacked, or other types. One or more electrode assemblies can be installed within a single battery cell.

[0063] Each battery cell is provided with a terminal post and an explosion-proof valve. In some embodiments, the terminal post and the explosion-proof valve are arranged on the same side of the battery cell. Specifically, the terminal post and the explosion-proof valve are arranged on the end cap. The terminal post includes a positive terminal post and a negative terminal post. The positive electrode has a positive tab, and the negative electrode has a negative tab. The positive terminal post is electrically connected to the positive tab, and the negative terminal post is electrically connected to the negative tab.

[0064] The aforementioned battery can be a battery pack or a battery module. When the battery is a battery pack, the battery pack also includes a battery management system (BMS). Multiple battery cells can be electrically connected in series, parallel, or a combination of series and parallel connections, and communicate with the battery management system, which controls and monitors the operating status of each battery cell. Alternatively, multiple battery cells can first be combined with a module management system to form a battery module, and then multiple battery modules can be electrically connected in series, parallel, or a combination of series and parallel connections to form a battery pack together with the battery management system.

[0065] The battery described above includes the data acquisition device in the embodiments of this application. The data acquisition device is used to acquire the working data (such as voltage and temperature) of each battery cell in the battery and transmit the acquired working data to the battery management system or module management system so as to monitor the working status of the battery.

[0066] The acquisition device proposed in the embodiments of this application is described below.

[0067] Reference Figure 1 The acquisition device 100 in this embodiment includes a connector 10, a main circuit 20, and branch circuits 30. The main circuit 20 is composed of a plurality of parallel and spaced wires 22 covered by a first insulating film layer 21. The main circuit 20 includes two acquisition segments 20a and two folded segments 20b corresponding to the two acquisition segments 20a. Each acquisition segment 20a extends in the same direction and is spaced apart from each other in its own width direction to form a clearance space a1. Each folded segment 20b is folded relative to the acquisition segment 20a it is connected to and is connected to the connector 10. Each acquisition segment 20a is correspondingly connected to a plurality of branch circuits 30. Each branch circuit 30 is welded to a different wire 22 at the acquisition segment 20a, and all branch circuits 30 are arranged on opposite sides of the two acquisition segments 20a in the aforementioned width direction.

[0068] Connector 10 is used to enable signal transmission between the acquisition device 100 and the battery 1000 management system or module management system. Connector 10 can be a plug-in terminal that plugs into the plug-in port of the battery 1000 management system or module management system.

[0069] Branch circuit 30 is used for thermally conductive and / or electrically conductive connection with battery cell 200. When branch circuit 30 is thermally conductively connected to battery cell 200, specifically to the end cap or terminal of battery cell 200, it is used to collect temperature data of battery cell 200. When branch circuit 30 is electrically conductively connected to battery cell 200, branch circuit 30 can be directly electrically connected to the terminal, or electrically connected to the terminal through bus 300, to collect voltage data of battery cell 200. When branch circuit 30 is both thermally and electrically connected to battery cell 200, branch circuit 30 can be directly electrically connected to the terminal and thermally connected to the terminal, simultaneously collecting voltage and temperature data, or electrically connected to the terminal and thermally connected to the bus 300, simultaneously collecting voltage and temperature data.

[0070] The main circuit 20 is used to transmit the data collected by the branch circuit 30 to the connector 10. The main circuit 20 is composed of a first insulating film layer 21 covering a plurality of wires 22, which are parallel to each other and spaced apart in a direction intersecting the extension direction. Each wire 22 is used to electrically connect to a branch circuit 30, realizing the data transmission of that branch circuit 30.

[0071] The first insulating film layer 21 is used to insulate the internal wires 22, and can be made of insulating materials such as polyimide (PI) or polyethylene terephthalate (PET). The wires 22 are conductive and can be made of materials such as copper, aluminum alloy, or silver. After the first insulating film layer 21 covers each wire 22, it can be heat-pressed to bond with the wires 22 to fix each wire 22. In this embodiment, the main circuit 20 can be an FFC (flexible flat cable).

[0072] In this embodiment, the main circuit 20 is divided into two acquisition groups, each including an acquisition segment 20a and a folded segment 20b. Within the same acquisition group, the first insulating film layer 21 extends from the acquisition segment 20a to the folded segment 20b, and each conductor 22 extends from the acquisition segment 20a to the folded segment 20b. For each acquisition group, multiple branch circuits 30 are arranged sequentially on the same side of the acquisition segment 20a along its extension direction. In the two acquisition groups, the branch circuits 30 are arranged on opposite sides of the two acquisition segments 20a.

[0073] The two acquisition segments 20a extend in the same direction (represented by the first direction X in the figure). In the width direction of the acquisition segments 20a (represented by the second direction Y in the figure), the two acquisition segments 20a form a clearance space a1. Figure 2 and Figure 3 It is understood that when the acquisition device 100 is applied to the battery 1000, the clearance space a1 can avoid the explosion-proof valve 201 on the battery cell 200.

[0074] In practical applications, such as Figure 2 and Figure 3 As shown, multiple battery cells 200 are arranged side-by-side along a first direction X to form a cell group. Each battery cell 200 has a positive terminal, a negative terminal, and an explosion-proof valve 201 arranged on the same side, with the explosion-proof valve 201 positioned between the positive and negative terminals. Two acquisition sections 20a of the acquisition device 100 are distributed on either side of each explosion-proof valve 201 in the cell group. The explosion-proof valve 201 is located within a clearance space a1 formed by the two acquisition sections 20a. Each acquisition section 20a is connected to the positive or negative terminal of each battery cell 200 via a branch circuit 30, and is arranged to avoid the explosion-proof valve 201.

[0075] The folding segment 20b itself undergoes at least one fold (each fold causes a portion of the folding segment 20b to overlap in the third direction Z in the figure), and the folding segment 20b is folded relative to the connected acquisition segment 20a. The two folding segments 20b are folded relative to the connected acquisition segment 20a, and the two folding segments 20b extend from the outside to the middle in the second direction Y, and are connected to the same connector 10. In the width direction of the acquisition segment 20a, the connector 10 is generally arranged between the two acquisition segments 20a, so that the overall size of the acquisition device 100 in the second direction Y is small.

[0076] In this embodiment, the main circuit 20 is divided into two acquisition sections 20a and two folding sections 20b. The clearance space a1 between the two acquisition sections 20a is used to avoid the explosion-proof valve 201, preventing high-temperature fumes from impacting the main circuit 20 when the explosion-proof valve 201 depressurizes, thus preventing risks such as short circuits or arcing. Simultaneously, the folding sections 20b connect the acquisition sections 20a and the connector 10. The folding sections 20b are connected to the same connector 10. In the width direction of the acquisition sections 20a, the connector 10 is approximately positioned between the two acquisition sections 20a, reducing the space occupied by the acquisition device 100.

[0077] In some embodiments, combined with Figure 1 Understand that each folded segment 20b includes N folded sub-segments b1 connected in sequence, one of which is located at the end and is connected to the acquisition segment 20a, and another of which is located at the end and is connected to the connector 10, and N≥2.

[0078] Folded segment 20b includes at least two folded sub-segments b1. For ease of description, the folded sub-segment b1 connected to acquisition segment 20a is referred to as the first folded sub-segment b1, and the folded sub-segment b1 connected to connector 10 is referred to as the last folded sub-segment b1. The first folded sub-segment b1 is folded relative to the connected acquisition segment 20a toward the other acquisition segment 20a, and the last folded sub-segment b1 is folded based on the previous folded sub-segment b1 and extends toward connector 10, with the extension direction being approximately parallel to the first direction X.

[0079] In this embodiment, the first direction X, the second direction Y, and the third direction Z are approximately perpendicular to each other. In practical applications, the third direction Z can correspond to the vertical direction. The subsequent folded segment b1 folds relative to the preceding folded segment b1 in the third direction Z. In practical applications, each subsequent folded segment b1 can fold upwards or downwards relative to the preceding folded segment b1, or it can fold partially upwards and partially downwards.

[0080] At this time, the folded segment 20b is composed of multiple folded sub-segments b1, which can flexibly adapt to the position of the connector 10 and has a low space occupancy rate.

[0081] Specifically, in the embodiments, combined with Figure 1 and Figure 4 It is understood that, starting from the folded sub-segment b1 connected to the acquisition segment 20a, the N folded sub-segments b1 of one of the folded segments 20b are sequentially folded toward one side of the acquisition segment 20a in the thickness direction, and the N folded sub-segments b1 of the other folded segment 20b are sequentially folded toward the other side of the acquisition segment 20a in the thickness direction.

[0082] The thickness direction of the acquisition segment 20a corresponds to the aforementioned third direction Z.

[0083] In this embodiment, in the two folded segments 20b of the main circuit 20, the folded sub-segments b1 of one folded segment 20b are folded upwards in the Z-direction, while the folded sub-segments b1 of the other folded segment 20b are folded downwards in the Z-direction. The folding directions of the two folded segments 20b are opposite. This makes the arrangement of each folded segment 20b more convenient, and the two segments will not interfere with each other.

[0084] Furthermore, combined Figure 4 It is understood that the projections of the Nth folded sub-segment b1 of the two folded segments 20b along the thickness direction overlap. This indicates that the two folded segments 20b partially overlap in the width direction of the acquisition segment 20a, and that the two folded segments 20b are connected at different positions of the connector 10 in the thickness direction.

[0085] In this way, not only can the two folded segments 20b share a certain space in the width direction of the acquisition segment 20a, reducing the space occupied by the main circuit 20 in the width direction of the acquisition segment 20a, but also the size occupied by the connector 10 in the aforementioned width direction can be reduced, making the connector 10 structure more compact.

[0086] It is worth mentioning that adjacent folded segments b1 can be fixed together by means of bonding, hot-melt connection, hot riveting, etc.

[0087] In some embodiments, combined with Figure 3It is understood that the folding angle of each folded segment b1 can also be a value between 0 and 60°, such as 30°, 45°, 60°, etc. Here, the folding angle refers to the angle α that the edge of the folded position presents before and after folding (e.g., ...). Figure 3 (As shown).

[0088] In some embodiments, the main circuit 20 and all branch circuits 30 are arranged symmetrically with respect to the same symmetry plane, which is parallel to the extension direction of the acquisition segment 20a.

[0089] In the battery cell assembly, the two terminals of each battery cell 200 are arranged symmetrically with respect to the plane of symmetry. In this case, the main circuit 20 and all branch circuits 30 are also arranged symmetrically with respect to the plane of symmetry, which can accommodate the arrangement of the terminals in the battery cell 200 and results in a simpler structure.

[0090] In some embodiments, all branch circuits 30 are arranged on the same side in the thickness direction of the corresponding acquisition segment 20a. Preferably, when the acquisition device 100 is applied to the battery 1000, such as... Figure 2 and Figure 3 As shown, the branch circuit 30 is arranged on the side of the acquisition segment 20a opposite to the battery cell 200 in the thickness direction. Specifically, all branch circuits 30 are arranged on the side of the corresponding acquisition segment 20a facing the battery cell 200 in the thickness direction.

[0091] Thus, after the acquisition device 100 is installed, it can protect the branch circuit 30 and prevent the branch circuit 30 from corrosion.

[0092] In some embodiments, the cross-sectional dimension of the conductor 22 in the width direction of the acquisition segment 20a is greater than its dimension in the thickness direction of the acquisition segment 20a.

[0093] That is, the conductor 22 is flat, specifically rectangular or elliptical. In practical applications, the flat conductor 22 can be obtained by rolling a round conductor 22. When the conductor 22 is flat, the height of the main circuit 20 can be reduced, and the lateral dimension can be increased. On the one hand, the conductor 22 can fit well with the first insulating film, avoiding air residue in the middle during the hot pressing of the first insulating film layer 21. On the other hand, it can reduce the internal resistance of the conductor 22.

[0094] In some embodiments, on each acquisition segment 20a, all branch circuits 30 are arranged sequentially along the extension direction of the acquisition segment 20a, and each branch circuit 30 is soldered to each wire 22 along the width direction of the acquisition segment 20a. Each branch circuit 30 is connected to one wire 22 on the acquisition segment 20a. The structures of each branch circuit 30 are basically the same. The connection position between each branch circuit 30 and the acquisition segment 20a can be selected according to the position of the wire 22, which simplifies the process and reduces costs. The soldering positions of each branch circuit 30 and each wire 22 can be set as needed, and this application is not limited thereto.

[0095] In some embodiments, each branch circuit 30 is sequentially soldered to each wire 22 along the width direction of the acquisition segment 20a, in the order in which all branch circuits 30 are arranged along the extension direction of the acquisition segment 20a.

[0096] Understandably, each branch circuit 30 is arranged sequentially from near to far relative to the folded section 20b along the extension direction of the acquisition section 20a, and each wire 22 is arranged sequentially from near to far relative to the clearance space a1 along the width direction of the acquisition section 20a. Specifically, each branch circuit 30 arranged sequentially from near to far relative to the folded section 20b can be soldered one-to-one with each wire 22 arranged sequentially from near to far relative to the clearance space a1, or one-to-one with each wire 22 arranged sequentially from far to near relative to the clearance space a1.

[0097] In this way, each branch circuit 30 is arranged according to the arrangement of the wires 22, which makes it less prone to errors.

[0098] In some embodiments, combined with Figure 5 It is understood that each wire 22 is arranged at intervals along the width direction of the acquisition segment 20a. The first insulating film layer 21 is provided with a first cutout 21b corresponding to each wire 22. Each first cutout 21b is staggered in both the extension direction and the width direction of the acquisition segment 20a. The branch circuit 30 is soldered to the wire 22 exposed by the first cutout 21b.

[0099] Specifically, the main circuit 20 includes two first insulating film layers 21, with the wire 22 sandwiched between the two first insulating film layers 21. The first insulating film layer 21 facing the branch circuit 30 is provided with the aforementioned first cutout 21b.

[0100] The first cutout 21b is designed to expose the wires 22 on the main circuit 20, so that the branch circuit 30 can be soldered to the exposed wires 22 to transmit the data collected by the branch circuit 30 to the main circuit 20.

[0101] The first cutout 21b provided for each wire 22 is staggered from the other first cutouts 21b in the first direction X and the second direction Y, so that the branch circuits 30 connected to each wire 22 can be staggered and will not overlap.

[0102] In some embodiments, combined with Figure 6 and Figure 7 It is understood that at least a portion of the wire 22 is provided with a cutout 22e, and in the extension direction of the wire 22, the first cutout 21b of the exposed wire 22 is located near the connector 10 relative to the cutout 22e.

[0103] The cutout 22e is a notch structure formed by cutting the wire 22 to form two unconnected segments. The front segment of the wire 22 is connected to the connector 10, and the rear segment of the wire 22 forms a break between it and the front segment. The first cutout 21b is set on the front segment of the wire 22 and is set closer to the connector 10 than the cutout 22e.

[0104] The setting of the cutout 22e serves two purposes: firstly, it locates the branch circuit position, meaning that the CCD camera can determine the branch circuit position by recognizing the position of the cutout 22e during the manufacturing process; secondly, it cuts off the wire 22 to prevent sampling abnormalities caused by the connection between the later section of the wire 22 and the adjacent wire 22 in some extreme cases.

[0105] In some embodiments, combined with Figure 7 It is understood that the spacing W between adjacent conductors 22 in the aforementioned width direction satisfies: 0.5mm≤W≤0.8mm.

[0106] Specifically, W can be selected as 0.5mm, 0.6mm, 0.7mm, 0.8mm, or any value between adjacent selections.

[0107] When W takes values ​​within the above range, the spacing between conductors 22 is shorter, which not only meets the requirements of the conductor 22 layout process, but also reduces the need for layout space.

[0108] In some embodiments, combined with Figure 7 It is understood that the dimension d of each conductor 22 in the width direction and the diameter D of each cut 22e satisfy: d+1 / 2*W≤D≤(d+W).

[0109] The dimension d of the conductor 22 in the aforementioned width direction is the width of the conductor 22. In this embodiment, the cut 22e is a cut formed by a circular cutter, and its diameter D is the maximum inner diameter of the cut 22e. Understandably, the width d of the conductor 22 is less than or equal to its diameter D in order to cut the conductor 22. However, if the difference between d and D is too small, the electrical clearance between the front and rear sections of the conductor 22 will be too small. Due to the creepage effect, electrical continuity can easily occur between the front and rear sections, making it impossible to break the circuit smoothly.

[0110] In this embodiment, on the one hand, it is required that d+1 / 2*W≤D to ensure that the electrical clearance between the front and rear sections of the conductor 22 is sufficient to achieve electrical disconnection between the front and rear sections of the conductor 22. On the other hand, it is required that D≤(d+W) to ensure that the adjacent conductors 22 are properly wrapped after being hot-pressed with the first insulating film layer 21, avoiding the conductors 22 from being exposed to the air and causing insulation problems.

[0111] In some embodiments, combined with Figure 5 , Figure 8 and Figure 9 It is understood that the branch circuit 30 is composed of a conductive layer 32 covered by a second insulating film layer 31. The branch circuit 30 is divided into a connected soldering area 30f and a collection area 30h. The conductive layer 32 of the soldering area 30f is provided with a soldering position f1. A second cutout 31j is provided on the second insulating film layer 31 of the soldering area 30f corresponding to the soldering position f1. The soldering position f1 exposed by the second cutout 31j is soldered to the wire 22. The conductive layer 32 of the collection area 30h is used to connect the busbar 300. Specifically, if a first cutout 21b is provided on the collection section 20a, the second cutout 31j is arranged opposite to the first cutout 21b to realize that the soldering position f1 corresponds to the position of the wire 22. In this embodiment, the branch circuit 30 can be an FPC (flexible printed circuit board).

[0112] The first cutout 21b on the acquisition end 20a faces the battery cell 200. When the branch circuit 30 is welded to the exposed wire 22, the welding area can face the battery cell, so that the welding area can be completely covered by the main circuit 20, thereby protecting the welding area and preventing the welding area from being exposed and chemically corroded, which would cause electrical circuit defects.

[0113] Understandably, the conductive layer 32 extends from the welding area 30f to the collection area 30h, and the second insulating film layer 31 covers the conductive layer 32 in each area.

[0114] The conductive layer 32 is conductive and is electrically connected to the busbar 300 through the conductive layer 32 in the acquisition area 30h. The busbar 300 is used to electrically connect to the terminal post or other components to obtain voltage data of the battery cell 200. In some embodiments, combined with Figure 8 and Figure 9It is understood that the branch circuit 30 is also divided into a buffer zone 30g, and the buffer zone 30g is a connection welding area 30f and a collection area 30h that can undergo elastic deformation.

[0115] Understandably, the second insulating film layer 31 extends sequentially through the welding area 30f, the buffer zone 30g, and the acquisition area 30h, and the conductive layer 32 extends sequentially through the welding area 30f, the buffer zone 30g, and the acquisition area 30h. The buffer zone 30g is typically, but not limited to, designed as a curve (such as an S-shape or an L-shape), and it can undergo elastic deformation in the extension direction and / or width direction of the branch circuit 30.

[0116] In practical applications, when the relative position of the main circuit 20 and the battery cell 200 changes due to the expansion and contraction of the battery cell 200 or external impact, causing the branch circuit 30 to be pulled, the second insulating film layer 31 and conductive layer 32 in the branch circuit 30 can synchronously and adaptively change their length and shape under the buffer of the buffer zone 30g, effectively preventing the branch circuit 30 from being pulled and broken, thus preventing poor data acquisition.

[0117] In some embodiments, the conductive layer 32 is a metal foil layer, such as a copper foil layer. Metal foil layers are easy to process into circuits, the technology is mature, and the cost is low. In other embodiments, the conductive layer 32 may also be a metal wire, such as a copper wire or a silver wire.

[0118] In some embodiments, since the copper foil layer is easily corroded, a protective layer (not shown) is provided on the branch circuit 30 and the acquisition section 20a in the area corresponding to the soldering position f1 of the soldering position f1 of the wire 22.

[0119] The protective layer can be a PI film, a PET film, or a protective adhesive layer (such as UV-curable adhesive), used to cover the welding area 30f of both the branch circuit 30 and the acquisition section 20a. The protective layer serves two purposes: firstly, it prevents moisture from entering the welding area 30f and causing chemical corrosion, which could lead to electrical circuit defects; secondly, it strengthens the structural integrity of the welding area 30f, facilitating process transfer. In this case, the branch circuit 30 can be positioned on the side of the acquisition section 20a facing away from the battery cell 200 in the thickness direction.

[0120] In other embodiments, the aforementioned protective layer may also be provided at the area where the collection area 30h is welded to the busbar 300.

[0121] In some embodiments, refer to Figure 9The conductive layer 32 of the buffer zone 30g contains a fuse segment g1. The fuse segment g1 is roughly filament-shaped and melts when the current flowing through it is too large, thereby cutting off the abnormal current and protecting the battery cell 200. Specifically, if the conductive layer 32 is a metal foil layer, the fuse segment g1 can be processed by etching or other methods. The specific structure of the fuse segment g1 can refer to conventional designs.

[0122] In some embodiments, such as Figure 8 As shown, the second insulating film layer 31 of the collection area 30h is provided with a perforated window h1, and a welding metal sheet is provided at the perforated window h1. The welding metal sheet is welded to the conductive layer 32 and is used to weld the busbar 300.

[0123] The perforated window h1 exposes a portion of the conductive layer 32 in the acquisition area 30h. A welding metal sheet is welded to the conductive layer 32 at the perforated window h1, and then the welding metal sheet is welded to the busbar 300. Because the conductive layer 32 is relatively thin, the welding metal sheet is used for transfer welding to ensure the strength of the weld to the busbar. Alternatively, the busbar and the welding metal sheet can be ultrasonically welded. The welding metal sheet can be, but is not limited to, a nickel sheet.

[0124] In other embodiments, the second insulating film layer 31 may only cover the portion of the conductive layer 32 located at the end of the acquisition area 30h near the buffer zone 30g, leaving the remaining portion of the conductive layer 32 in the acquisition area 30h exposed to facilitate welding with the busbar 300.

[0125] In some embodiments, refer to Figure 9 The welding position f1 is provided with a welding hole f2 that extends through the thickness direction of the welding area 30f. The solder passes through the welding hole f2 to connect the welding position f1 to the wire 22.

[0126] The welding hole f2 is used for flowing solder. During actual welding, the solder flows through the welding hole f2 between the welding position f1 and the wire 22, and after solidification, the two are welded together. Alternatively, multiple welding holes f2 can be provided at each welding position f1, and these multiple welding holes f2 are spaced apart in the width direction of the branch circuit 30 for a more reliable weld.

[0127] In some embodiments, combined with Figure 9 and Figure 10 It is understood that each welding area 30f has multiple rows of welding positions f1, and each row of welding positions f1 has a first cutout 21b. The number of rows of welding positions f1 is the same as the number of wires 22 contained in each acquisition segment 20a. The arrangement position of each row of welding positions f1 along the width direction of the acquisition segment 20a is different, and different branch circuits 30 are welded to the corresponding wires 22 through welding positions f1 in different arrangement positions.

[0128] Understandably, the first insulating film layer 21 of the welding area 30f is provided with a plurality of second cutouts 31j, which are arranged one-to-one with the plurality of welding positions f1. The plurality of welding positions f1 are arranged from far to near relative to the acquisition area 30h in the second direction Y. In practical applications, the branch circuit 30 arranged closer to the folded section 20b is welded to the wire 22 on the acquisition section 20a via the welding position f1 closer to the acquisition area 30h, or the branch circuit 30 arranged closer to the folded section 20b is welded to the wire 22 on the acquisition section 20a via the welding position f1 farther away from the acquisition area 30h.

[0129] In this way, each branch circuit 30 is provided with multiple soldering positions f1. The corresponding soldering position f1 can be selected according to the position of the branch circuit 30 and soldered to the corresponding wire 22. This can unify the production specifications of the branch circuit 30, realize the mass production of the branch circuit 30, and reduce costs.

[0130] In some embodiments, combined with Figure 5 , Figure 6 and Figure 11 Understandably, connector 10 includes two sets of pins 11, each set of pins 11 corresponding to an electrical connection with a folded segment 20b. Each pin 11 is provided with multiple claws 11k, all of which pierce the first insulating film layer 21 of the corresponding folded segment 20b along the thickness direction and bend and hug the same wire 22 inside the folded segment 20b. The claws 11k of different pins 11 hug different wires 22.

[0131] As is easily understood, each pin 11 is needle-shaped and extends in the same direction to form a column. Specifically, multiple pins 11 in the same group are arranged side by side at intervals along the second direction Y. Pins 11 in different groups are arranged at intervals along the third direction Z.

[0132] Each pin 11 is provided with multiple barbs 11k. The barbs 11k on the same pin 11 pierce the first insulating film layer 21 of the folded segment 20b along the third direction Z, and bend and hug the same wire 22 to achieve electrical connection between the pin 11 and the wire 22. The barbs 11k of one set of pins 11 are connected to the wire 22 of one of the folded segments 20b, and the barbs 11k of another set of pins 11 are connected to the wire 22 of another folded segment 20b.

[0133] In practical applications, connector 10 electrically connects to the plug-in port of battery management system or module management system 1000 via its pins 11 to achieve signal transmission. The design of the pawl 11k ensures a reliable connection between pins 11 and wire 22.

[0134] In a specific embodiment, multiple spikes 11k on the same pin 11 are divided into two groups. The two groups of spikes 11k are spaced apart in the width direction of the folded section 20b, and all spikes 11k are staggered along the extension direction of the folded section 20b.

[0135] Understandably, for the same pin 11, the bending directions of its two claws 11k are opposite, so as to both grip the same wire 22 tightly. The multiple claws 11k are staggered along the extension direction of the pin 11 (i.e. the extension direction of the folded section 20b), so that multiple positions in the extension direction of the wire 22 are gripped by the claws 11k, making the connection between the pin 11 and the wire 22 more reliable and the current-carrying area larger.

[0136] In some embodiments, combined with Figure 4 It is understood that the claws 11k on different groups of pins 11 are oriented in opposite directions along the thickness direction of the folded section 20b. The thickness direction of the folded section 20b corresponds to the aforementioned third direction Z. Specifically, the upper group of pins 11 has its claws 11k facing downwards and piercing the first insulating film layer 21 from top to bottom. The lower group of pins 11 has its claws 11k facing upwards and piercing the first insulating film layer 21 from bottom to top. That is, the claws 11k of different groups of pins 11 extend relatively in the thickness direction of the folded section 20b.

[0137] This makes it easier to pierce the two folded sections 20b with the claws 11k of the two sets of pins 11, simplifying the processing and production of the collection device 100.

[0138] In addition, the battery 1000 provided in this application embodiment, combined with Figure 2 and Figure 3 The understanding includes multiple stacked battery cells 200 and the acquisition device 100 in any of the above embodiments. Each battery cell 200 has a positive terminal, a negative terminal, and an explosion-proof valve 201 on one side in the height direction. The explosion-proof valve 201 is located between the positive terminal and the negative terminal. A branch circuit 30 connecting one of the acquisition segments 20a is connected to the positive or negative terminal located on the same side of the multiple explosion-proof valves 201. A branch circuit 30 connecting another acquisition segment 20a is connected to the positive or negative terminal located on the other side of the multiple explosion-proof valves 201. The explosion-proof valve 201 is located in the clearance space a1.

[0139] Can multiple battery cells 200 be arranged in groups, i.e., along the first direction X? Then multiple explosion-proof valves 201 are also arranged along the first direction X. Multiple positive and / or negative terminals are provided on both sides of each explosion-proof valve 201. The positive and negative terminals of the multiple explosion-proof valves 201 vary depending on the series or parallel connection method of the multiple battery cells 200. Generally, if they are connected in series, the positive and negative terminals of two adjacent battery cells are located on one side of the multiple explosion-proof valves 201. In another case, if they are connected in parallel, the positive terminals of two adjacent battery cells are located on one side of the multiple explosion-proof valves.

[0140] If multiple explosion-proof valves 201 have multiple positive and negative terminals on one side and multiple positive and negative terminals on the other side, a branch circuit 30 of one acquisition segment 20a can be connected to the positive or negative terminal on one side, and a branch circuit 30 of another acquisition segment 20a can be connected to the positive or negative terminal on the other side. If multiple explosion-proof valves 201 have multiple positive terminals on one side and multiple negative terminals on the other side, then a branch circuit 30 of one acquisition segment 20a can be connected to the positive terminal on one side, and a branch circuit 30 of another acquisition segment 20a can be connected to the negative terminal on the other side. Furthermore, the number of branch circuits 30 is not limited and can be configured according to the acquisition points, design requirements, and cost. This application is not limited to this; it is sufficient that the voltage and temperature data of the terminals and busbars on both sides of the explosion-proof valve 201 can be acquired through the branch circuits 30 on the two acquisition segments 20 respectively.

[0141] The battery 1000 includes all the beneficial effects of the above embodiments, which will not be repeated here.

[0142] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0143] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A data acquisition device (100), characterized in that, include: Connector (10); The main circuit (20) is composed of a first insulating film layer (21) covering a plurality of parallel and spaced wires (22); the main circuit (20) includes two acquisition segments (20a) and two folded segments (20b) corresponding to the two acquisition segments (20a). Each acquisition segment (20a) extends in the same direction and forms a clearance space (a1) between each other in its own width direction. Each folded segment (20b) is folded relative to the acquisition segment (20a) it is connected to and is connected to the connector (10). Branch circuits (30), each of the acquisition segments (20a) is connected to a plurality of branch circuits (30), each of the branch circuits (30) is welded to different wires (22) at the acquisition segment (20a), and all the branch circuits (30) are arranged on opposite sides of the two acquisition segments (20a) in the width direction.

2. The data acquisition device (100) according to claim 1, characterized in that, Each of the folded segments (20b) includes N folded sub-segments (b1) connected in sequence, one of which is located at the end and is connected to the acquisition segment (20a), and another of which is located at the end and is connected to the connector (10), where N≥2.

3. The data acquisition device (100) according to claim 2, characterized in that, Starting with the folded sub-segments (b1) connected to the acquisition segment (20a), N folded sub-segments (b1) of one of the folded segments (20b) are folded sequentially toward one side of the acquisition segment (20a) in the thickness direction, and N folded sub-segments (b1) of another folded segment (20b) are folded sequentially toward the other side of the acquisition segment (20a) in the thickness direction.

4. The data acquisition device (100) according to claim 1, characterized in that, The main circuit (20) and all the branch circuits (30) are arranged symmetrically with respect to the same symmetry plane, which is parallel to the extension direction of the acquisition segment (20a); And / or, all of the branch circuits (30) are arranged on the same side in the thickness direction corresponding to the acquisition segment (20a); And / or, the cross-section of the conductor (22) is larger in the width direction of the acquisition segment (20a) than in the thickness direction of the acquisition segment (20a); And / or, on each of the acquisition segments (20a), in the order in which all the branch circuits (30) are arranged sequentially along the extension direction of the acquisition segment (20a), each of the branch circuits (30) is sequentially welded to each of the wires (22) along the width direction of the acquisition segment (20a).

5. The data acquisition device (100) according to claim 1, characterized in that, Each of the wires (22) is arranged at intervals along the width direction of the acquisition segment (20a). The first insulating film layer (21) is provided with a first cutout (21b) corresponding to each of the wires (22). Each of the first cutouts (21b) is staggered in both the extension direction and the width direction of the acquisition segment (20a). The branch circuit (30) is welded to the wires (22) exposed by the first cutouts (21b).

6. The data acquisition device (100) according to claim 5, characterized in that, At least a portion of the wire (22) is provided with a cutout (22e), and in the extension direction of the wire (22), the first cutout (21b) exposing the wire (22) is located close to the connector (10) relative to the cutout (22e); The spacing W between adjacent conductors (22) in the width direction, the dimension d of each conductor (22) in the width direction, and the diameter D of each cut (22e) satisfy: d+1 / 2*W≤D≤(d+W), 0.5mm≤W≤0.8mm.

7. The data acquisition device (100) according to any one of claims 1-6, characterized in that, The branch circuit (30) is composed of a conductive layer (32) covered by a second insulating film layer (31). The branch circuit (30) is divided into a connected soldering area (30f) and a collection area (30h). The conductive layer (32) of the soldering area (30f) is provided with a soldering position (f1). The second insulating film layer (31) of the soldering area (30f) is provided with a second cutout (31j) corresponding to the soldering position (f1). The soldering position (f1) exposed by the second cutout (31j) is soldered to the wire (22). The conductive layer (32) of the collection area (30h) is used to connect the busbar (300). The branch circuit (30) is further divided into a buffer zone (30g), which is elastically deformable and connects the welding area (30f) and the acquisition area (30h).

8. The data acquisition device (100) according to claim 7, characterized in that, On the branch circuit (30) and the acquisition segment (20a), the areas corresponding to the welding positions of the welding position (f1) and the wire (22) are covered with a protective layer; And / or, the conductive layer (32) is a metal foil layer; And / or, the conductive layer (32) of the buffer (30g) contains a fuse segment (g1); And / or, the second insulating film layer (31) of the collection area (30h) is provided with a hollow window (h1), and a welding metal sheet is provided at the hollow window (h1), and the welding metal sheet is welded to the conductive layer (32) for welding the busbar (300); And / or, the welding position (f1) is provided with a welding hole (f2) that extends through the thickness direction of the welding area (30f), and the solder passes through the welding hole (f2) to connect the welding position (f1) to the wire (22); And / or, each of the welding areas (30f) is provided with multiple rows of welding positions (f1), and each row of welding positions (f1) is provided with a second cutout (31j). The number of rows of welding positions (f1) is the same as the number of wires (22) included in each acquisition segment (20a). The arrangement position of each row of welding positions (f1) along the width direction of the acquisition segment (20a) is different, and different branch circuits (30) are welded to the corresponding wires (22) via welding positions (f1) with different arrangement positions.

9. The data acquisition device (100) according to any one of claims 1-6, characterized in that, The connector (10) includes two sets of pins (11), each set of pins (11) being electrically connected to one of the folded segments (20b); Each of the pins (11) is provided with a plurality of barbs (11k). All the barbs (11k) pierce the first insulating film layer (21) of the folded segment (20b) along the thickness direction of the corresponding folded segment (20b) and bend and hug the same wire (22) in the folded segment (20b). The barbs (11k) of different pins (11) hug different wires (22). The multiple pawls (11k) on the same pin (11) are divided into two groups, and the two groups of pawls (11k) are spaced apart in the width direction of the folded section (20b), and all the pawls (11k) are staggered along the extension direction of the folded section (20b). The pawls (11k) on the different groups of pins (11) are oriented in opposite directions along the thickness direction of the folded section (20b).

10. A battery (1000), characterized in that, include: Multiple stacked battery cells (200) are provided, and each battery cell (200) has a positive terminal, a negative terminal and an explosion-proof valve (201) on one side in the height direction, and the explosion-proof valve (201) is located between the positive terminal and the negative terminal; The acquisition device (100) according to any one of claims 1-9, wherein the branch circuit (30) connecting one of the acquisition segments (20a) is connected to the positive or negative terminal located on the same side of the plurality of explosion-proof valves (201), and the branch circuit (30) connecting the other acquisition segment (20a) is connected to the positive or negative terminal located on the same other side of the plurality of explosion-proof valves (201), wherein the explosion-proof valve (201) is located in the clearance space (a1).

11. The battery (1000) according to claim 10, characterized in that, All of the branch circuits (30) are arranged on the side of the battery cell (200) in the thickness direction corresponding to the acquisition segment (20a).

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