Battery cell signal acquisition module and battery pack

Abstract

To provide a signal sampling module for a battery cell which further improves functional stability of a battery pack by stably maintaining an effective insertion relation between a needle type insertion part and an insertion structure even in a case where vibration is generated in the battery pack, and a battery pack.SOLUTION: A signal sampling module comprises a holder 10, a circuit board 11, a plurality of needle type electric connection materials, and a plurality of signal sampling lines 13. The holder has a first side face 101 and a second side face 102 which are opposed in a first direction. A plurality of insertion structures 110 is provided in the circuit board, and the needle type electric connection material includes a first connection part and a needle type insertion part 1220. The needle type insertion parts of the needle type electric connection materials are inserted into the plurality of insertion structures in one-to-one correspondence. The needle type insertion part is electrically connected to a battery management circuit which is loaded on the circuit board, second connection parts of the plurality of signal sampling lines are correspondingly connected to the first connection parts of the plurality of needle type electric connection materials, and a sampling part of the signal sampling line samples a signal of a battery cell.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present application relates to the technical field of batteries, for example, to a signal acquisition module for a battery cell and a battery pack. [Background technology]

[0002] In a battery pack, in order to monitor the usage status of the battery cells, it is often necessary to use a collection harness to collect and transmit signals from the battery cells, such as voltage signals and temperature signals of the battery cells. In the related art, the collection harness is usually bundled together with a harness connector, and the harness connector is inserted into a circuit connector on a circuit board to connect the collection harness to a battery management circuit mounted on the circuit board. Summary of the Invention [Problem to be solved by the invention]

[0003] However, when vibrations occur in the battery pack (for example, during production and assembly, during transportation of the battery pack, or while the vehicle to which the battery pack is attached is running), the harness connector and circuit connector are prone to loosening, poor contact, and other problems. [Means for solving the problem]

[0004] In a first aspect, the present application provides a signal acquisition module for a battery cell, comprising: The battery cell signal acquisition module includes: a holder having a first side surface and a second side surface facing each other along a first direction, to which the battery cell is attached; a circuit board connected to the holder and located on the second side surface, the circuit board having a plurality of insertion structures and including a battery management circuit configured to be electrically connected to the battery cells; a plurality of needle-shaped electrical connection members, each having a first connection portion and a needle-shaped insertion portion that is inserted into the plurality of insertion structures in a one-to-one correspondence and is electrically connected to the battery management circuit; Each of the plurality of needle-type electrical connection members has a second connection portion connected to a corresponding one of the plurality of first connection portions of the plurality of needle-type electrical connection members, and a plurality of signal acquisition lines each having an acquisition portion configured to acquire a signal from the battery cell.

[0005] For example, the holder further includes a position control structure protruding from the second side surface, the plurality of needle-shaped electrical connection members are partially provided within the position control structure, and at least a portion of the first connection portion and the needle-shaped insertion portion are exposed to the external environment of the holder.

[0006] For example, a plurality of electronic components are mounted on a side of the circuit board facing the second side surface, and projections of the plurality of electronic components and the position restriction structure on the circuit board do not overlap along the first direction, The height to which the position control structure protrudes from the second side surface along the first direction is h1, and the maximum height to which the entire plurality of electronic components protrude from the circuit board in the direction approaching the holder is h2, where h1≧h2.

[0007] For example, each of the needle-shaped electrical connection members has a first part and a second part connected to each other with an angle therebetween, the first part having the first connection portion and being provided in the holder, and the second part having the needle-shaped insertion portion.

[0008] For example, the second side surface is provided with a plurality of spaced first position restriction grooves, and the first position restriction grooves have a first opening facing the circuit board, the first portion is at least partially disposed within the first position restriction groove, and the side of the first connection portion away from the groove bottom of the first position restriction groove is at least partially exposed to the external environment of the holder through the first opening.

[0009] For example, the second part comprises a main body part connected between the first part and the needle-shaped insertion part, the holder further comprises a second position regulating part provided on the second side surface, the second position regulating part has a plurality of spaced second position regulating grooves, and the second position regulating groove has a second opening located on the side of the second position regulating part closer to the circuit board, the main body part is provided within the second position regulating groove, and the needle-shaped insertion part at least partially extends from the second opening toward the circuit board.

[0010] For example, the needle-shaped electrical connecting members are fitted into the holder.

[0011] For example, the first connection portion is located between the holder and the circuit board.

[0012] For example, the needle-shaped insertion portion is further welded to the circuit board and electrically connected to the battery management circuit, or the insertion structure further includes an elastic conductive material electrically connected to the battery management circuit, and the elastic conductive material can elastically abut against the needle-shaped insertion portion.

[0013] For example, the plurality of signal collection lines include a first collection line in which the collection unit is connected to a temperature detection material, The holder has a first accommodating groove provided on the first side surface and configured to accommodate the battery cell, the holder further has a second accommodating groove communicating with the first accommodating groove, and the temperature detection material is provided in the second accommodating groove.

[0014] For example, the holder has a plurality of first accommodating grooves provided on the first side surface and configured to accommodate the battery cells, and arranged along the second direction, and each of the plurality of first accommodating grooves is configured to accommodate one of the battery cells; the signal acquisition module further includes electrical connection pieces that correspond to one side of any two adjacent first accommodating grooves along the third direction and are provided on the holder, and are configured to electrically connect the two battery cells located in the two corresponding first accommodating grooves, and the first direction, the second direction, and the third direction intersect each other two by two; The plurality of signal acquisition lines include a second acquisition line whose acquisition portion is connected to the electrical connection piece and is electrically conductive.

[0015] For example, the electrical connection piece has an engagement hole and the holder has an engagement protrusion corresponding to the engagement hole, or the holder has an engagement hole and the electrical connection piece has an engagement protrusion corresponding to the engagement hole, and the engagement protrusion can pass through the engagement hole so that the electrical connection piece and the holder are engaged with each other.

[0016] For example, the signal acquisition module further includes a busbar piece having opposing first and second ends, the first end configured to be electrically connected to the battery cell, and the second end configured to be electrically connected to the battery management circuit, the holder is provided with a first screw hole, the circuit board is provided with a first through hole corresponding to the first screw hole, the second end is provided with a second through hole corresponding to the first through hole, and a first bolt passes through the second through hole and the first through hole sequentially and is screwed into the first screw hole to connect the second end and the circuit board to the holder.

[0017] For example, the busbar piece further includes an arch-shaped bent structure connected between the first end and the second end and capable of elastic deformation.

[0018] In a second aspect, a battery cell; and the signal acquisition module according to the first aspect, in which the battery cell is attached to a first side surface of a holder; Provide a battery pack. [Effects of the Invention]

[0019] The beneficial effects of the present invention are as follows: The circuit board is connected to one side of the holder along the first direction, and a plurality of needle-shaped electrical connecting members are directly provided on the holder, so that the needle-shaped insertion portions of the needle-shaped electrical connecting members can be directly inserted into the insertion structure of the circuit board. By connecting the circuit board and the holder to each other, the insertion relationship between the needle-shaped insertion portions and the insertion structure can be maintained stably. As a result, when vibrations occur in the battery pack, the needle-shaped insertion portions and the insertion structure are less likely to loosen or cause poor contact, and a stable and effective insertion relationship can still be maintained, so the functional stability of the battery pack is better. [Brief explanation of the drawings]

[0020] The present invention will be described in more detail below with reference to the drawings and examples.

[0021] [Figure 1] 1 is a schematic diagram of the three-dimensional structure of a signal acquisition module of a battery cell according to a possible implementation of the present application at one angle. [Figure 2] 1 is a schematic diagram of the three-dimensional structure of a signal acquisition module of a battery cell according to a possible implementation of the present application at another angle; [Figure 3] 1 is a schematic plan view of a signal acquisition module for a battery cell according to a possible implementation of the present application; [Figure 4] 3 is an exploded schematic diagram of the structure of the signal acquisition module of the battery cell shown in FIG. 2. [Figure 5] 5 is a schematic diagram of the three-dimensional structure of the needle-shaped electrical connecting member, the signal collection line, and the temperature detecting member shown in FIG. 4. FIG. [Figure 6] FIG. 4 is a cross-sectional view taken along the line AA in FIG. [Figure 7] FIG. 4 is a cross-sectional view taken along the arrow BB in FIG. 3. [Figure 8] 1 is a schematic diagram of a three-dimensional structure of a battery pack according to a possible embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0022] In the description of this application, unless otherwise clearly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, internal communication between two elements, or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0023] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features through another feature between them, rather than direct contact. Furthermore, a first feature being "above," "above," and "on the upper surface" of a second feature may include the first feature being directly above and diagonally above the second feature, or may simply indicate that the horizontal height of the first feature is higher than that of the second feature. A first feature being "below," "below," and "on the lower surface" of a second feature may include the first feature being directly below and diagonally below the second feature, or may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0024] As shown in FIGS. 1 to 5, the present application provides a battery cell signal acquisition module 1, including a holder 10, a circuit board 11, a plurality of needle-shaped electrical connection members 12, and a plurality of signal acquisition lines 13. The holder 10 has a first side 101 and a second side 102 opposite to each other along a first direction S1. The first side 101 is used for mounting a battery cell 20. The circuit board 11 is connected to the holder 10 and located on the second side 102. A plurality of insertion structures 110 are provided. A battery management circuit 113 is mounted on the circuit board 113. The battery management circuit 113 is configured to be electrically connected to the battery cell. The needle-shaped electrical connection members 12 have a first connection portion 1210 and a needle-shaped electrical connection member 12. The needle-type electrical connecting members 12 have a first connecting portion 1220, and a plurality of first connecting portions 1210 are spaced apart on the holder 10. The needle-type inserting portions 1220 of the plurality of needle-type electrical connecting members 12 are inserted into the plurality of inserting structures 110 in a one-to-one correspondence, and the needle-type inserting portions 1220 are electrically connected to the battery management circuit 113. The signal collecting line 13 has a second connecting portion 130 and a collecting portion 131. The second connecting portions 130 of the plurality of signal collecting lines 13 are connected to the first connecting portions 1210 of the plurality of needle-type electrical connecting members 12, and the collecting portion 131 is configured to collect signals from the battery cells 20. In Figures 1, 2, 4 and 5, the first direction S1 is indicated by an arrow.

[0025] The circuit board 11 is connected to one side of the holder 10 in the first direction S1, and a plurality of needle-shaped electrical connecting members 12 are directly mounted on the holder 10, allowing the needle-shaped insertion portions 1220 of the needle-shaped electrical connecting members 12 to be directly inserted into the insertion structure 110 of the circuit board 11. By connecting the circuit board 11 and the holder 10 to each other, the insertion relationship between the needle-shaped insertion portions 1220 and the insertion structure 110 is maintained stably. As a result, when vibrations occur in the battery pack, the needle-shaped insertion portions 1220 and the insertion structure 110 are less likely to loosen or cause poor contact, and a stable and effective insertion relationship can still be maintained, improving the functional stability of the battery pack.

[0026] It is understood that the circuit board 11 may include a battery management system (BMS), and the battery management circuit may be a circuit included in the battery management system.

[0027] For example, the signal acquisition module 1 further includes two busbar pieces 14, each having an opposing first end 141 and a second end 142, the first end 141 being configured to be electrically connected to a plurality of battery cells connected in series or parallel as an output electrode of the output battery cell, and the second end 142 being electrically connected to the battery management circuit 113, thereby allowing the two busbar pieces 14 to connect all of the battery cells 20 mounted on the holder 10 to the battery management circuit 113.

[0028] For example, a first screw hole is provided in the holder 10, a first through hole is provided in the circuit board 11 corresponding to the first screw hole, a second through hole is provided in the second end 142 corresponding to the first through hole, and a first bolt 102a passes through the second through hole and the first through hole sequentially and is screwed into the first screw hole to connect the second end 142 and the circuit board 11 to the holder 10. Thus, by screwing the first bolt 102a into the first screw hole, the three components of the second end 142, the circuit board 11, and the holder 10 can be connected to each other and fixed in place by restricting their positions relative to each other.

[0029] For example, the busbar piece 14 further has an arch-shaped bent structure 143 connected between the first end 141 and the second end 142, which allows the relative position between the first end 141 and the second end 142 to change within a certain range and is elastically deformable to facilitate connection of the first end 141 to a corresponding battery cell 20 mounted on the holder 10. For example, when the second end 142 is connected to the holder 10 by the first bolt 102a, the relative position between the second end 142 and the holder 10 is fixed. Therefore, by elastically deforming the arch-shaped bent structure 143, the relative position between the first end 141 and the holder 10 can be changed to a certain extent, providing a buffering effect and facilitating connection of the first end 141 to a corresponding battery cell 20 mounted on the holder 10.

[0030] For example, a second screw hole is further provided in the holder 10, and a third through hole corresponding to the second screw hole is provided in the circuit board 11, and the second bolt 102b passes through the third through hole and is screwed into the second screw hole to connect the circuit board 11 to the holder 10. Thus, by screwing the second bolt 102b into the second screw hole, the circuit board 11 and the holder 10 can be connected to each other and fixed in position relative to each other. Furthermore, the position where the circuit board 11 is connected to the holder 10 and is positionally restricted can be increased, further improving the stability of the relative position between the circuit board 11 and the holder 10 after the circuit board 11 is assembled to the holder 10, and further improving the stability of the insertion relationship between the needle-shaped insertion portion 1220 and the insertion structure 110.

[0031] For example, the holder 10 has a first accommodating groove 103 located on the first side surface 101, and the first accommodating groove 103 can be configured to accommodate a battery cell.

[0032] For example, the holder 10 has a plurality of first accommodating grooves 103, which are arranged along the second direction S2, and each of the plurality of first accommodating grooves 103 is configured to accommodate one battery cell, so that the holder 10 can accommodate a plurality of battery cells, wherein the second direction S2 intersects with the first direction S1, and the second direction S2 is indicated by an arrow in Figures 1 to 5.

[0033] For example, the signal acquisition module 1 further includes an electrical connection piece 15, which may be a copper bar or an aluminum bar. The electrical connection piece 15 corresponds to one side of any two adjacent first accommodating grooves 103 along the third direction S3 and is provided on the holder 10. The electrical connection piece 15 is configured to electrically connect two battery cells located in each of the two corresponding first accommodating grooves 103. Thus, the electrical connection piece 15 connects the multiple battery cells mounted on the holder 10 in series or parallel to each other, or connects some of the multiple battery cells in series and some of the battery cells in parallel to each other. The first direction S1, the second direction S2, and the third direction S3 intersect each other two by two. In Figures 1 to 5, the third direction S3 is indicated by an arrow. In Figures 1, 2, 4, and 5, the first direction S1, the second direction S2, and the third direction S3 are indicated by coordinates. For example, the first direction S1, the second direction S2, and the third direction S3 may be perpendicular to each other, two by two.

[0034] For example, one of the electrical connection piece 15 and the holder 10 may be provided with an engaging hole 150, and the other of the two may be provided with an engaging protrusion 106 corresponding to the engaging hole 150; that is, the electrical connection piece 15 may be provided with an engaging hole 150, and the holder 10 may be provided with an engaging protrusion 106 corresponding to the engaging hole 150; or the holder 10 may be provided with an engaging hole 150, and the electrical connection piece 15 may be provided with an engaging protrusion 106 corresponding to the engaging hole 150, and the engaging protrusion 106 can pass through the engaging hole 150 so that the electrical connection piece 15 and the holder 10 can engage with each other; thereby, during the assembly process of the signal acquisition module 1, the relative positions of the electrical connection piece 15 and the holder 10 can be fixed, and the signal acquisition module 1 can be easily assembled into an integrated structure.

[0035] For example, the engaging protrusion 106 may be a hot rivet post, for example, the engaging protrusion 106 may be made of a plastic material that can be melted at high temperatures. After the engaging protrusion 106 passes through the corresponding engaging hole 150, the end of the engaging protrusion 106 can be hot pressed so that the engaging protrusion 106 is crimped onto the electrical connection piece 15, thereby further fixing the electrical connection piece 15 and the holder 10.

[0036] For example, the insertion structure 110 may have an insertion hole or an insertion groove, so that the needle-type insertion part 1220 can be inserted into the insertion structure 110 by inserting it into the insertion hole or the insertion groove, and the needle-type electrical connection material 12 may be a PIN needle, and the installation space occupied by the PIN needle and the insertion hole or the insertion groove structure is smaller than the installation space occupied by the male-female pair connector structure such as the harness connector and the circuit connector in the related art. Therefore, the interlocking structure between the needle-type insertion part 1220 and the insertion structure 110 can make the overall structure of the signal collection module 1 more compact, which is advantageous for further improving the energy density of the battery pack equipped with the signal collection module 1.

[0037] In order to easily maintain a stable electrical connection between the needle-shaped insertion portion 1220 and the battery management circuit 113 and improve the stability of the signal acquisition function of the signal acquisition module 1, for example, the needle-shaped insertion portion 1220 is further welded to the circuit board 11, and the needle-shaped insertion portion 1220 is electrically connected to the battery management circuit 113 by solder, which wraps around the end face of the insertion structure 110 and extends into the gap between the insertion structure 110 and the needle-shaped insertion portion 1220; or the insertion structure 110 further includes an elastic conductive material, which may include, but is not limited to, an elastic piece, a spring, etc. that can be conductive, and the elastic conductive material is electrically connected to the battery management circuit 113 and can elastically abut against the needle-shaped insertion portion 1220, so that the needle-shaped insertion portion 1220 is inserted into the insertion hole and electrically connected to the battery management circuit 113 by the elastic conductive material.

[0038] 6, for example, the needle-shaped electrical connection material 12 has a first part 121 and a second part 122 connected to each other with an angle therebetween, the first part 121 has a first connection part 1210, and the first part 121 is provided on the holder 10, and the second part 122 has a needle-shaped insertion part 1220, which can increase the effective connection area between the first part 121 and the second side 102 of the holder 10 so that the connection relationship between the needle-shaped electrical connection material 12 and the holder 10 is stronger, while the second part 122 can be bent relative to the first part 121 toward the circuit board 11 so that the needle-shaped insertion part 1220 can extend away from the holder 10 along the first direction S1 and be inserted into the insertion structure 110.

[0039] Preferably, the second part 122 may have a strip-like structure, so that the surface area of ​​the second part 122 is larger, which can further increase the effective connection area between the second part 122 and the holder 10 and further improve the connection strength between the needle-type electrical connection material 12 and the holder 10; meanwhile, the area of ​​the outer surface of the first connection part 1210 can be larger, which can provide a larger effective connection area for the second connection part 130, so that the first connection part 1210 and the second connection part 130 can be more firmly connected to each other.

[0040] For example, the first connecting portion 1210 may be located between the holder 10 and the circuit board 11, in other words, the projection of the first connecting portion 1210 on the second side surface 102 along the first direction S1 is located within the projection range of the second side surface 102 of the circuit board 11, allowing the needle-type insertion portion 1220 of the needle-type electrical connecting member 12 to be directly inserted into the insertion structure 110 of the circuit board 11 along the first direction S1, which provides a certain protection for the connection structure between the first connecting portion 1210 and the second connecting portion 130. The holder 10 and the circuit board 11 can shield the first connection portion 1210 from each of two opposing sides along the first direction S1 of the first connection portion 1210, thereby forming an effect that makes it easier for the first connection portion 1210 and the second connection portion 130 to be held in a stable connection relationship, while also improving the compactness of the three components of the first connection portion 1210, the holder 10, and the circuit board 11, making the overall structure of the signal collection module 1 more compact and rational.

[0041] In other embodiments, along the first direction S1, the projection of the first connection portion 1210 on the second side 102 may be located outside the projection range on the second side 102 of the circuit board 11, or along the first direction S1, the projection of the first connection portion 1210 on the second side 102 may partially overlap with the projection on the second side 102 of the circuit board 11.

[0042] For example, a plurality of needle-shaped electrical connecting members 12 can be fitted into the holder 10, thereby improving the connection stability between the holder 10 and the needle-shaped electrical connecting members 12.

[0043] For example, the entire holder 10 may be made of plastic material, and the holder 10 may be injection molded with a plurality of needle-shaped electrical connecting members 12, so that the molding process of the holder 10 and the process of inserting the plurality of needle-shaped electrical connecting members 12 into the holder 10 can be completed in one step, which simplifies the manufacturing process of the signal acquisition module 1.

[0044] For example, the holder 10 further includes a position control structure 104 protruding from the second side surface 102, the needle-shaped electrical connection material 12 is partially disposed within the position control structure 104, and at least a portion of the first connection portion 1210 and the needle-shaped insertion portion 1220 is exposed to the external environment of the holder 10, so that the position control structure 104 can control the relative position of the needle-shaped electrical connection material 12 and the holder 10, and the position control structure 104 does not affect the connection of the needle-shaped electrical connection material 12 to the second connection portion 130 and the insertion structure 110, respectively.

[0045] For example, a plurality of electronic components 111 are mounted on the side of the circuit board 11 facing the second side 102, and the projections of the plurality of electronic components 111 and the positioning structure 104 on the circuit board 11 do not overlap along the first direction S1. In other words, the plurality of electronic components 111 located between the circuit board 11 and the second side 102 are arranged offset from the positioning structure 104, which improves the compactness of the installation of the plurality of electronic components 111 and the positioning structure 104 and makes more effective use of the space between the circuit board 11 and the second side 102, allowing the distance between the circuit board 11 and the second side 102 along the first direction S1 to be smaller. This enables the signal acquisition module 1 to be designed more compactly, which is advantageous for improving the energy density of a battery pack equipped with the signal acquisition module 1 of this embodiment.

[0046] The height of the protrusion from the second side surface 102 of the position control structure 104 along the first direction S1 is h1, and the maximum height of the entire plurality of electronic components 111 along the first direction S1 is h2. For example, the heights h1 and h2 may satisfy h1≧h2, so that when the needle-shaped insertion portion 1220 is inserted into the insertion structure 110, the circuit board 11 can abut against the protruding top of the position control structure 104, thereby improving the position control and protection effect of the needle-shaped electrical connecting material 12 by the position control structure 104.

[0047] For example, when the needle-shaped electrical connecting member 12 has a first portion 121 and a second portion 122 connected to each other with an included angle therebetween, for example, a plurality of first position restricting grooves 1041 are provided at intervals on the second side surface 102, and the first position restricting grooves 1041 have first openings 1041a facing the circuit board 11, the first portion 121 is at least partially provided within the first position restricting grooves 1041, and the side of the first connecting portion 1210 that is away from the groove bottom of the first position restricting grooves 1041 is at least partially in contact with the first openings 1041a. The first position regulating groove 1041 is exposed to the external environment of the holder 10 through the first opening 1041a, thereby regulating the relative position between the first part 121 and the holder 10 so that the relative position between the entire needle-shaped electrical connection material 12 and the holder 10 can be more easily maintained and stabilized.In addition, by exposing the first connection part 1210 through the first opening 1041a, the first connection part 1210 can be connected to the second connection part 130 of the signal collection line 13 wired from outside the holder 10.

[0048] For example, the first position regulating groove 1041 may be provided directly on the second side surface 102, or the holder 10 may further include a first position regulating portion 1043 provided on the second side surface 102 (i.e., the position regulating structure 104 may include a first position regulating portion 1043), and multiple first position regulating grooves 1041 are provided at intervals in the first position regulating portion 1043.

[0049] For example, the second part 122 includes a main body part 1221 connected between the first part 121 and the needle-type insertion part 1220, the holder 10 further includes a second position restricting part 1042 provided on the second side surface 102 (i.e., the position restricting structure 104 may include the second position restricting part 1042), the second position restricting part 1042 is provided with a plurality of second position restricting grooves 1042a spaced apart from each other, and the second position restricting grooves 1042a have second openings 1042b located on the side of the second position restricting part 1042 closer to the circuit board 11, and the main body part 1221 is provided with the second position restricting grooves 1042. a, and the needle-shaped insertion portion 1220 at least partially protrudes from the second opening 1042b toward the circuit board 11, whereby the relative position between the main body portion 1221 and the holder 10 can be regulated by the second position regulating portion 1042 so that the relative position between the entire needle-shaped electrical connection material 12 and the holder 10 can be more easily maintained stably, and by making the needle-shaped insertion portion 1220 protrude from the second opening 1042b, the needle-shaped insertion portion 1220 can be inserted into the insertion structure 110 on the circuit board 11 along the first direction S1.

[0050] For example, the second side surface 102 of the holder 10 may be simultaneously provided with the first position regulating portion 1043 described in the above-mentioned technical solution and the second position regulating portion 1042 described in the above-mentioned technical solution (i.e., the position regulating structure 104 may be provided with the first position regulating portion 1043 described in the above-mentioned technical solution and the second position regulating portion 1042 described in the above-mentioned technical solution). In this case, the first position regulating groove 1041 communicates with the second position regulating groove 1042a, so that the first portion 121 and the main body portion 1221 can be connected to each other. In this way, the position distribution of the position regulating effect of the position regulating structure 104 on the needle-shaped electrical connection member 12 can be wider, the position regulating effect of the position regulating structure 104 on the needle-shaped electrical connection member 12 can be improved, and the relative position stability of the entire needle-shaped electrical connection member 12 and the holder 10 can be improved.

[0051] It can be understood that in order to monitor the usage of a battery cell, it is usually necessary to acquire temperature and / or voltage signals of the battery cell.

[0052] 5 and 7, when the signal acquisition module 1 is capable of acquiring temperature signals of the battery cell, for example, the plurality of signal acquisition lines 13 includes a first acquisition line 13a, the acquisition portion 131 of the first acquisition line 13a is connected to the temperature detection material 16, the holder 10 is further provided with a second accommodating groove 105 communicating with the first accommodating groove 103, the temperature detection material 16 may include, but is not limited to, a thermistor or an infrared temperature measurement sensor, and the temperature detection material 16 is provided in the second accommodating groove 105, and the first acquisition line 13a can acquire a signal emitted by the temperature detection material 16 in response to temperature changes in the surrounding environment and transmit it to the battery management circuit 113, thereby allowing the battery management circuit 113 to obtain the temperature change situation in the environment within the first accommodating groove 103 and the second accommodating groove 105 around the temperature detection material 16.

[0053] When the temperature detection material 16 is equipped with a thermistor, for example, each of the collection portions 131 of the two first collection lines 13a may be connected to the same temperature detection material 16, thereby forming a circuit by connecting the two first collection lines 13a to the temperature detection material 16, and the two first collection lines 13a can collect and obtain the current change status at both ends of the temperature detection material 16, allowing the battery management circuit 113 to calculate and obtain the resistance change status of the temperature detection material 16 and to inversely estimate and obtain the temperature change status of the temperature detection material 16, thereby obtaining the temperature change status in the environment within the first accommodating groove 103 and the second accommodating groove 105 around the temperature detection material 16.

[0054] For example, in order for the holder 10 to be able to accommodate multiple battery cells, the holder 10 may have multiple first accommodating grooves 103 arranged along the second direction S2, of which the second direction S2 is perpendicular to the first direction S1. As a result, when battery cells are accommodated in each of the multiple first accommodating grooves 103, a heat concentration area is likely to be formed in the center of the holder 10 along the second direction S2. In other words, the local temperature in the center of the holder 10 along the second direction S2 is likely to be highest. In this case, for example, at least one second accommodating groove 105 may be located approximately in the center of the holder 10 along the second direction S2, so that at least one temperature detection material 16 is located approximately in the center of the holder 10 along the second direction S2. Furthermore, by linking the temperature detection material 16 with the first sampling line 13a, the highest local temperature condition of the holder 10 can be roughly monitored and obtained.

[0055] Since the heat exchange efficiency between the position close to the outside along the second direction S2 of the holder 10 and the external environment is highest, the local temperature at that point on the holder 10 is likely to be the lowest.Based on this, for example, a second storage groove 105 may be provided at a position close to the outside along the second direction S2 of the holder 10, so that the temperature detection material 16 located in the second storage groove 105 can work in conjunction with the first collection line 13a to roughly monitor and obtain the lowest local temperature condition of the holder 10.

[0056] Based on this, when the signal acquisition module 1 is capable of acquiring voltage signals of the battery cells, for example, the multiple signal acquisition lines 13 include a second acquisition line 13b, which is electrically connected to the battery cells, thereby being able to acquire electrical signals of the battery cells, and further being able to cooperate with two battery management circuits 113 electrically connected to all of the battery cells mounted on the holder 10, and in this way the signal acquisition module 1 acquires and obtains voltage signals of the battery cells.

[0057] For example, if the signal acquisition module 1 further includes an electrical connection piece 15, the acquisition portion 131 of the second acquisition line 13b may be connected to the electrical connection piece 15 and electrically conductive with each other, so that the acquisition portion 131 does not need to be connected to the battery cell after the battery cell is placed in the first accommodating groove 103, and may be connected to the electrical connection piece 15 when the signal acquisition module 1 is assembled, and the acquisition portion 131 may be connected to the electrical connection piece 15 and electrically conductive with each other by methods including, but not limited to, welding, bolt connection, etc.

[0058] When the signal acquisition module 1 is capable of acquiring temperature signals and voltage signals of the battery cells, it can be understood that the multiple signal acquisition lines 13 may simultaneously include the first acquisition line 13a and the second acquisition line 13b as described in the above-mentioned technical solution.

[0059] As shown in Fig. 8, the present application further provides a battery pack 2 including a battery cell 20 and a signal acquisition module 1 as described in the above technical solution. In combination with what is shown in Fig. 1, the battery cell 20 is attached to the first side 101, and the connection stability between the signal acquisition line 13 of the signal acquisition module 1 and the circuit board 11 is better, so that the battery pack 2 can still have good functional stability when vibration occurs.

[0060] In the description of this application, the terms "upper," "lower," "left," "right," and other orientations and positional relationships are based on the orientations and positional relationships shown in the drawings, and are merely for the purpose of facilitating the description and simplifying the operation. It should be understood that they do not indicate or imply that the referenced devices or elements must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as limiting this application. Furthermore, the terms "first" and "second" are merely used for distinction in the description and do not have any special meaning.

[0061] In the description herein, references to "one embodiment," "example," etc., mean that the specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In the description herein, schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0062] Furthermore, although this specification is described according to embodiments, each embodiment does not include only one independent technical solution, and such description of the specification is for the purpose of clarity only, and those skilled in the art should treat the specification as a whole, and should understand that the technical solutions of multiple examples may be combined as appropriate to form other embodiments that are understandable to those skilled in the art. [Explanation of symbols]

[0063] 1 signal acquisition module, 10 holder, 101 first side surface, 102 second side surface, 102a first bolt, 102b second bolt, 103 first accommodating groove, 104 position restriction structure, 1041 first position restriction groove, 1041a first opening, 1042 second position restriction portion, 1042a second position restriction groove, 1042b second opening, 1043 first position restriction portion, 105 second accommodating groove, 106 engaging protrusion, 11 circuit board, 110 insertion structure, 111 electronic component, 113 ··Battery management circuit, 12··Needle-shaped electrical connection member, 121···First part, 1210···First connection part, 122···Second part, 1220···Needle-shaped insertion part, 1221···Main body part, 13···Signal collection line, 130···Second connection part, 131···Collection part, 13a···First collection line, 13b···Second collection line, 14···Busbar piece, 141···First end, 142···Second end, 143···Arch-shaped bent structure, 15···Electrical connection piece, 150···Attachment hole, 16···Temperature detection material, 2···Battery pack, 20···Battery cell.

Claims

1. A battery cell signal acquisition module, a holder having a first side surface and a second side surface facing each other along a first direction, to which the battery cell is attached; a circuit board connected to the holder and located on the second side surface, the circuit board having a plurality of insertion structures and including a battery management circuit configured to be electrically connected to the battery cells; a plurality of needle-shaped electrical connection members each provided on the holder, each having a first connection portion and a needle-shaped insertion portion that is inserted into the plurality of insertion structures in a one-to-one correspondence and electrically connected to the battery management circuit; a plurality of signal acquisition lines, each of which has a second connection portion connected to a corresponding one of the plurality of first connection portions of the plurality of needle-type electrical connection members, and a collection portion configured to collect a signal from the battery cell; Battery cell signal acquisition module.

2. the holder further includes a position restriction structure protruding from the second side surface, the plurality of needle-shaped electrical connecting members are partially provided within the position restriction structure, and at least a portion of the first connecting portion and the needle-shaped insertion portion are exposed to an external environment of the holder; The battery cell signal acquisition module according to claim 1 .

3. a plurality of electronic components are mounted on a side of the circuit board facing the second side surface, and projections of the plurality of electronic components and the position restriction structure on the circuit board do not overlap along the first direction; a height h1 of the position restriction structure protruding from the second side surface along the first direction, a maximum height h2 of the entire electronic components protruding from the circuit board in a direction approaching the holder, and h1≧h2. The battery cell signal acquisition module according to claim 2 .

4. Each of the needle-shaped electrical connecting members has a first portion and a second portion connected to each other with an included angle therebetween, the first portion having the first connecting portion and being attached to the holder, and the second portion having the needle-shaped insertion portion. The battery cell signal acquisition module according to claim 1 .

5. a plurality of first position restriction grooves spaced apart from one another on the second side surface, each of the first position restriction grooves having a first opening facing the circuit board, the first portion being at least partially disposed within the first position restriction groove, and a side of the first connection portion separated from a groove bottom of the first position restriction groove being at least partially exposed to an external environment of the holder through the first opening; The battery cell signal acquisition module according to claim 4 .

6. the second portion comprises a main body portion connected between the first portion and the needle-shaped insertion portion, the holder further comprises a second position restricting portion provided on the second side surface, the second position restricting portion is provided with a plurality of spaced second position restricting grooves, and the second position restricting grooves have a second opening located on a side of the second position restricting portion closer to the circuit board, the main body portion is provided within the second position restricting groove, and the needle-shaped insertion portion at least partially protrudes from the second opening toward the circuit board. The battery cell signal acquisition module according to claim 4 .

7. The needle-shaped electrical connecting members are fitted into the holder. The battery cell signal acquisition module according to any one of claims 1 to 6.

8. the first connection portion is located between the holder and the circuit board; The battery cell signal acquisition module according to any one of claims 1 to 6.

9. The needle-shaped insertion portion is further welded to the circuit board and electrically connected to the battery management circuit, or the insertion structure further includes an elastic conductive material electrically connected to the battery management circuit, and the elastic conductive material can elastically abut against the needle-shaped insertion portion. The battery cell signal acquisition module according to any one of claims 1 to 6.

10. the plurality of signal collection lines include a first collection line in which the collection portion is connected to a temperature detection material; the holder has a first accommodating groove provided on the first side surface and configured to accommodate the battery cell, the holder is further provided with a second accommodating groove communicating with the first accommodating groove, and the temperature detection material is provided in the second accommodating groove; The battery cell signal acquisition module according to any one of claims 1 to 6.

11. the holder is provided on the first side surface and configured to accommodate the battery cells, and has a plurality of first accommodating grooves arranged along a second direction, each of the plurality of first accommodating grooves configured to accommodate one of the battery cells; the signal acquisition module further includes electrical connection pieces that correspond to one side of any two adjacent first accommodating grooves in the third direction and are provided on the holder, the electrical connection pieces being configured to electrically connect the two battery cells located in the two corresponding first accommodating grooves, and the first direction, the second direction, and the third direction intersect with each other two by two; The plurality of signal acquisition lines include a second acquisition line, the acquisition portion of which is connected to the electrical connection piece and electrically conductive. The battery cell signal acquisition module according to any one of claims 1 to 6.

12. The electrical connection piece is provided with an engaging hole, and the holder is provided with an engaging protrusion corresponding to the engaging hole, or the holder is provided with the engaging hole, and the electrical connection piece is provided with an engaging protrusion corresponding to the engaging hole, and the engaging protrusion can pass through the engaging hole so that the electrical connection piece and the holder are engaged with each other. The battery cell signal acquisition module according to claim 11.

13. the holder further includes a busbar piece having a first end and a second end opposite to each other, the first end being configured to be electrically connected to the battery cell and the second end being configured to be electrically connected to the battery management circuit, the holder having a first screw hole, the circuit board having a first through hole corresponding to the first screw hole, the second end having a second through hole corresponding to the first through hole, and a first bolt passing through the second through hole and the first through hole in sequence and screwed into the first screw hole to connect the second end and the circuit board to the holder; The battery cell signal acquisition module according to any one of claims 1 to 6.

14. the busbar piece further has an arch-shaped bent structure connected between the first end and the second end and elastically deformable; The battery cell signal acquisition module according to claim 13.

15. a battery cell; and the signal acquisition module according to any one of claims 1 to 6, wherein the battery cell is attached to a first side surface of a holder; Battery pack.

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