Battery module

Abstract

Battery module comprising several battery cell components, a printed circuit board (100) and a connection array component (200); wherein one of the several battery cell components comprises several battery cells; wherein a voltage sensing circuit is produced on the printed circuit board (100) by etching; wherein the connection array component (200) comprises several connection arrays (210), each connection array (210) comprising a connection array body (211) and a cantilever structure (212) connected to the connection array body (211), wherein the several connection arrays (210) of the same connection array component (200) are arranged to correspond to several battery cells of the same battery cell component, and the connection array bodies (211) of several connection arrays (210) are all connected to positive electrodes of corresponding battery cells.or wherein the connection row bodies (211) of several connection rows (210) are all connected to the negative electrodes of the corresponding battery cells, wherein cantilever structures (212) of any two adjacent connection rows (210) are electrically connected to each other, wherein the cantilever structures (212) of the several connection rows (210) are all soldered to the circuit board (100), wherein the voltage sensing circuit is configured to detect a voltage of the cantilever structures (212).

Description

The present application claims priority to Chinese Patent Application Serial No. 202322134282.1 filed with the Chinese Patent Office on Wedtwoch, August 9, 2023, and the entire contents of the above application are incorporated into the present application by reference.TECHNICAL FIELDThe present application relates to the technical field of batteries, for example a battery module.PRIOR ARTCurrently, voltage sensors and voltage detection circuits are commonly provided on the bus bar to detect the voltage of the battery module.TECHNICAL PROBLEMSRelated technologies provide an integrated bus module in which a bus bar is disposed directly on a printed circuit board (PCB) and the printed circuit board supports the bus bar to reduce the space occupied by the module. In addition, the bus bar is connected to the circuit board via the detection chip, and the voltage detection circuit set on the circuit board detects the voltage of the bus bar via a detection chip to detect the voltage of the battery module. However, in this integrated bus module, the bus bar must be connected to the circuit board via a special sensing chip. In bus bars requiring series and parallel connections, the structure is still relatively complex.TECHNICAL SOLUTIONSThe present application provides a battery module comprising a plurality of battery cell components, a circuit board and a connection row component, wherein the battery cell component comprises a plurality of battery cells; wherein a voltage detection circuit is produced on the circuit board by etching; wherein the connection row component comprises a plurality of connection rows, wherein the respective connection row comprises a connection row body and a cantilever structure, wherein the cantilever structure is connected to the connection row body, wherein the plurality of connection rows of the same connection row component are respectively arranged associated with a plurality of battery cells of the same battery cell component, and wherein the connection row bodies of a plurality of connection rows are all connected to the positive electrodes of respective battery cells, or wherein the connection row bodies of a plurality of connection rows are all connected to the negative electrodes of the respective battery cells, wherein the cantilever structures of any adjacent connection rows are electrically connected to each other. The cantilever structures of a plurality of connection rows are soldered to the circuit board, and the voltage detection circuit is set to detect the voltage of the cantilever structure.ADVANTAGEOUS EFFECTSAdvantageous Effects of the Present Application:The present application provides a battery module including a circuit board and a connection series component, wherein on the circuit board, a voltage detection circuit is manufactured by etching, wherein the connection series component includes a plurality of connection series, wherein the connection series includes a connection series body and a cantilever structure connected to the connection series body, wherein the plurality of connection series of the same connection series component is arranged corresponding to a plurality of battery cells of the same battery cell component, respectively, and wherein the connection series bodies of a plurality of connection series are all connected to the positive electrodes of respective battery cells, or wherein the connection series bodies of a plurality of connection series are all connected to the negative electrodes of the respective battery cells, wherein the cantilever structures of any adjacent connection series are electrically connected to each other, whereby a plurality of battery cells of the battery cell component are connected in parallel, wherein the cantilever structures of a plurality of connection series are meanwhile soldered to the circuit board, and the voltage detection circuit is set such that, detecting the voltage of each cantilever structure to realize the detection of the voltage of the connection series. Since two adjacent connection series are connected via a cantilever structure, the voltage detection circuit directly detects the voltage of the cantilever structure without requiring an additional detection chip, and the structure is simple.BRIEF DESCRIPTION OF THE DRAWINGSFIG. 1 is a schematic structural diagram of a battery module provided by some implementations of the present application; FIG. 2 is an enlarged view of the location A in FIG. 1 ; FIG. 3 is a schematic plan view of a battery module provided by some implementations of the present application; FIG. 4 is a schematic structural illustration of a series of interconnects provided by some implementations of the present application; FIG. 5 is a schematic structural illustration of another battery module provided by some implementations of the present application.Shown therein are:100. CIRCUIT BOARD; CIRCUIT BOARD;200. Link Row component; 210. Connecting row; 211. Connection row body; 2111. Positive electrode connection portion; 2112. Negative electrode connection portion; 212. Cantilever structure; 2121. Boom Mounting Piece; 2122. Boom; 2123. Bent portion; 2124. an extension portion;300. fuse;400. temperature sensing apparatus;500. A bus bar.CONCRETE EMBODIMENTSIn describing the present application, it should be noted that, unless otherwise stated and limited, the terms "connection", "connection", "fastening" are to be broadly understood, for example, it may be a fixed connection or a detachable connection or integral connection; it may be a mechanical or electrical connection; it may be a direct connection or an indirect connection via an interposed medium; and it may be an internal communication of two elements or an interaction of two elements. Those skilled in the art can understand the specific meanings of the terms in the present application according to specific situations.In the present application, the case that the first feature is "above" or "below" the second feature may include that the first feature and the second feature are in direct contact, and also that the first feature and the second feature are not in direct contact but are in contact between them by another feature unless otherwise clearly indicated and limited. Moreover, the case that the first feature is "above", "on" and "above" the second feature may include the first feature being directly above and obliquely above the second feature, or may mean that the first feature has a higher plane than the second feature. The case that the first feature is "below", "below" and "down" the second feature may include the first feature being directly below and obliquely below the second feature, or may mean that the first feature has a smaller plane than the second feature.In describing the present embodiment, the terms "upper", "lower", "left", "right" and the like may be the orientations or positional relationships shown based on the drawings and serve for convenience of description and ease of operation, rather than indicating or implying that the stated device or element has a particular orientation or orientation or must be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application. Moreover, the terms "first" and "second" are used for distinction in the specification and have no particular meaning.In FIGS. 1 to 5, the battery module includes a plurality of battery cell components, each battery cell component including a plurality of battery cells, also a circuit board 100 and a connection series component 200, on which circuit board 100 a voltage detection circuit is fabricated by etching. The connection row component 200 comprises a plurality of connection rows 210, wherein the respective connection row 210 comprises a connection row body 211 and a cantilever structure 212, wherein the cantilever structure 212 is connected to the connection row body 211, wherein the plurality of connection rows 210 of the same connection row component 200 are arranged in each case assigned to a plurality of battery cells of the same battery cell component, and wherein the connection row bodies 211 of a plurality of connection rows 210 are all connected to the positive electrodes of corresponding battery cells, or wherein the connection row bodies 211 of a plurality of connection rows 210 are all connected to the negative electrodes of the corresponding battery cells, wherein the cantilever structures 212 of two connection rows 210 that are arbitrarily adjacent are electrically connected to one another, whereby a plurality of battery cells of the battery cell component are connected in parallel, wherein the cantilever structures 212 of the plurality of connection rows 210 are all soldered to the printed circuit board 100, wherein the voltage detection circuit is configured such that it detects the voltage of each cantilever structure 212. FIG. 5 shows the voltage detection circuit and the voltage detection point for realizing the detection of the voltage of the connection series 210, wherein the circuit board 100 can play the role of signal detection and transmission and at the same time, as the electronic component carrier, can improve the integration degree and omit the resin cover in the conventional solution. In addition, since two adjacent connection rows 210 are connected via one cantilever pattern 212, the voltage detection circuit directly detects the voltage of the cantilever pattern 212 without requiring an additional detection chip, and the structure is simple.With further reference to FIGS. 1 to 4, the plurality of link rows 210 of the link row component 200 are arranged one after another along a first direction, wherein one of the link rows 210 includes two cantilever structures 212, wherein the two cantilever structures 212 are respectively provided on both sides of the link row body 211 along the first direction. Here, the first direction is the XY direction in FIGS. 1 and 3. two beam structures 212 located between the two link rows 210 must be provided in the two adjacent link rows 210, and the two link rows 210 can be connected to each other by two beam structures 212 to simplify the connection structure between the link rows 210.With further reference to FIGS. 1-4, the battery module also includes a fuse 300, wherein the fuse 300 is connected between the cantilever structures 212 of any two adjacent rows of connections 210 such that the two rows of connections 210 are electrically connected to each other. One end of the fuse 300 is connected to a cantilever structure 212 of one of the link rows 210, and the other end is connected to the cantilever structure 212 of another link row 210 adjacent to the cantilever structure 212. By arranging the fuse 300 between the parallel-connected battery cells, fuse protection can be provided between the two parallel-connected battery cells.With further reference to FIGS. 1 to 4, the boom structure 212 includes a boom mounting piece 2121 and two booms 2122, the two booms 2122 being respectively disposed on the boom mounting piece 2121, two fuses 300 being provided between the boom structures 212 of two adjacent connection rows 210, the two booms 2122 of the boom structure 212 being respectively connected to one of the two fuses 300. With this arrangement, two fuses 300 can be arranged in parallel between two adjacent connection rows 210 to improve safety performance.With continued reference to FIGS. 1-4, during the battery cell assembly process, some battery cells are stacked in the vertical direction. Due to tolerances, the surface heights of the upper ends of a plurality of stacked battery cells are different. In this regard, the cantilever mounting piece 2121 includes a bent portion 2123 and an extended portion 2124, the bent portion 2123 is connected to the connection row 210, and the extended portion 2124 is connected to the bent portion 2123, the extended portion 2124 extends along the first direction, and the bent portion 2123 and the extended portion 2124 are disposed at an angle to the vertical direction, and the bent portion 2123 is disposed at an angle to the vertical direction, the first direction is perpendicular to the vertical direction, whereby the bent portion 2123 is bent relative to the extended portion 2124 to conform to the surface of the upper end of the battery cell of different height, to compensate for the tolerance of the battery cell stack, and at the same time, to be used as a buffer structure for shock absorption. Alternatively, it is provided that an arcuate transition exists between the bending section 2123 and the extension section 2124.Alternatively, it is contemplated that the cantilever structure 212 may be made of elastic material and the bending portion 2123 and the extension portion 2124 may undergo elastic deformation such that both the bending portion 2123 and the extension portion 2124 may be bent, thereby allowing the connection row 210 to adapt to battery cells of different height and position.Still referring to FIGS. 1 to 4, along the first direction, among the plurality of link rows 210 of the link row component 200, the link rows 210 located at both ends are end link rows, the respective end link row including one beam structure 212 connected to other link rows 210 and another beam structure 212 not connected to other link rows 210. In the present embodiment, it is provided that at least a part of the end link rows is equipped with a temperature detection device 400, and the temperature detection device 400 is disposed on the cantilever structure 212 away from other link rows 210. The temperature of the connection row 210 may be detected via the temperature detection device 400, that is, the temperature detection device 400 is disposed on the cantilever structure 212 that is not connected to other connection rows 210, and such an arrangement may make the overall structure of the battery module more compact. Alternatively, it is provided that the temperature detection device 400 is provided as plural ones, so that temperatures at plural positions can be detected by the plural temperature detection devices 400.With continued reference to FIGS. 1-4, the circuit board 100 includes a plurality of solder pads, wherein the cantilever structures 212 of the plurality of connection rows 210 are each soldered to one of the plurality of solder pads, wherein disassembly and assembly of the connection row 210 may be facilitated by the provision of solder pads. In addition, the solder pad is connected to the voltage sensing circuit, so that the voltage sensing circuit can sense the voltage of each cantilever structure 212. The fuse 300 is soldered to the solder pad to facilitate assembly and disassembly of each component.With further reference to FIGS. 1 to 4, the connection row body 211 includes a positive electrode connection portion 2111 and a negative electrode connection portion 2112, the positive electrode connection portion 2111 being configured to be connected to the positive electrode of the battery cell of one battery cell component, the negative electrode connection portion 2112 being configured to be connected to the negative electrode of the battery cell of another battery cell component. Alternatively, it is provided that each battery cell component comprises the same number of a plurality of battery cells, wherein in the battery cell component, the positive electrode of the battery cell of the battery cell component located in the middle is connected to the connection row 210 of a connection row component 200, wherein the negative electrode of the battery cell is connected to the connection row 210 of another connection row component 200, wherein the battery cell components located at both ends are respectively the battery cell component at the first end and the battery cell component at the second end, wherein the positive electrode of the battery cell of the battery cell component at the first end is connected to the connection row 210 of the connection row component 200, wherein the negative electrode of the battery cell of the battery cell component at the second end is connected to the connection row 210 of the connection row component 200. Alternatively, it is contemplated that the battery module further comprises two bus bars 500, one bus bar 500 being simultaneously connected to the negative electrodes of a plurality of battery cells of the battery cell component at the first end, and the other bus bar 500 being simultaneously connected to the positive electrodes of a plurality of battery cells of the battery cell component at the second end.With further reference to FIGS. 1 to 4, the circuit board 100 is provided with a positive electrode connection hole and a negative electrode connection hole, the positive electrode connection portion 2111 is provided in the positive electrode connection hole, and the negative electrode connection portion 2112 is provided in the negative electrode connection hole. By providing the positive electrode connection hole and the negative electrode connection hole, both the positive electrode connection portion 2111 and the negative electrode connection portion 2112 pass through the corresponding connection holes so as to be applied to the positive electrode or the negative electrode of the battery cell, and the positive electrode connection portion 2111 and the negative electrode connection portion 2112 may be limited.

Claims

A battery module comprising a plurality of battery cell components, a circuit board (100), and a connection row component (200); wherein one of the plurality of battery cell components comprises a plurality of battery cells; wherein a voltage sensing circuit is fabricated by etching on the circuit board (100); wherein the connection row component (200) comprises a plurality of connection rows (210), wherein the respective connection row (210) comprises a connection row body (211) and a cantilever structure (212) connected to the connection row body (211), wherein the plurality of connection rows (210) of the same connection row component (200) are respectively arranged associated with a plurality of battery cells of the same battery cell component, and the connection row bodies (211) of a plurality of connection rows (210) are all connected to positive electrodes of respective battery cells, or wherein the connection row bodies (211) of a plurality of connection rows (210) are all connected to negative electrodes of the respective battery cells, wherein cantilever structures (212) of any two adjacent connection rows (210) are electrically connected to each other, wherein the cantilever structures (212) of the plurality of connection rows (210) are all soldered to the circuit board (100), wherein the voltage detection circuit is configured to detect a voltage of the cantilever structures (212).The battery module of claim 1, wherein the plurality of connection rows (210) of the connection row component (200) are sequentially arranged along a first direction, wherein one of the connection rows (210) comprises two cantilever structures (212), wherein the two cantilever structures (212) are respectively provided on both sides of the connection row body (211) along the first direction.The battery module of claim 2, further comprising a fuse (300), wherein the fuse (300) is connected between the cantilever structures (212) of any two adjacent connection rows (210).The battery module according to claim 3, wherein the cantilever structure (212) comprises a cantilever mounting piece (2121) and two cantilevers (2122), the two cantilevers (2122) being respectively disposed on the cantilever mounting piece (2121), two fuses (300) being provided between the cantilever structures (212) of two adjacent connection rows (210), the two cantilevers (2122) of the cantilever structure (212) being respectively connected to one of the two fuses (300).The battery module of claim 2, wherein the respective cantilever structure (212) comprises a cantilever mounting piece (2121) and a cantilever (2122), wherein the cantilever (2122) is disposed on the cantilever mounting piece (2121), wherein the cantilever mounting piece (2121) comprises a bending portion (2123) and an extension portion (2124), wherein the bending portion (2123) is connected to the connection row (210), wherein the extension portion (2124) is connected to the bending portion (2123) and an end of the extension portion (2124) extends along the first direction, wherein the bending portion (2123) and the extension portion (2124) are disposed at an angle to each other, and the bending portion (2123) is disposed at an angle to the vertical direction, wherein the first direction is perpendicular to the vertical direction.The battery module according to claim 2, wherein along the first direction, among the plurality of connection rows (210) of the connection row component (200), the connection rows (210) located at both ends are end connection rows, and at least a part of the end connection rows is equipped with a temperature detection device (400), and wherein the temperature detection device (400) is disposed on the cantilever structure (212) away from other connection rows (210).The battery module of any one of claims 1 to 6, wherein the circuit board (100) includes a plurality of solder pads, wherein the cantilever structures (212) of the plurality of connection rows (210) are each soldered to one of the plurality of solder pads.The battery module according to any one of claims 1 to 6, wherein the connection row body (211) comprises a positive electrode connection portion (2111) and a negative electrode connection portion (2112), the positive electrode connection portion (2111) being configured to be connected to the positive electrode of a battery cell of the battery cell component, the negative electrode connection portion (2112) being configured to be connected to the negative electrode of a battery cell of another battery cell component.The battery module according to claim 8, wherein the circuit board (100) is provided with a positive electrode connection hole and a negative electrode connection hole, the positive electrode connection portion (2111) being disposed in the positive electrode connection hole, the negative electrode connection portion (2112) being disposed in the negative electrode connection hole.The battery module according to any one of claims 1 to 6, wherein the cantilever structure (212) is an elastic structure.

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