Signal acquisition assembly of battery cell and battery pack

Abstract

The signal acquisition assembly comprises a support, a circuit board, a plurality of needle type electric connecting pieces and a plurality of signal acquisition lines, the support is provided with a first side face and a second side face which are opposite in the first direction, the first side face is used for installing the battery cell, and the second side face is used for installing the battery cell. The circuit board is connected to the support and located on the second side face, the circuit board is provided with a plurality of plug-in structures, the needle-type electric connecting pieces are provided with first connecting parts and needle-type plug-in parts, the needle-type plug-in parts of the needle-type electric connecting pieces are plugged into the plug-in structures in a one-to-one correspondence mode, and the needle-type plug-in parts are electrically connected to a battery management circuit borne by the circuit board. The second connecting parts of the signal acquisition lines are correspondingly connected to the first connecting parts of the needle-type electric connecting pieces, the acquisition parts of the signal acquisition lines are used for acquiring the signals of the battery cells, and the connection stability of the signal acquisition lines of the signal acquisition assembly and the circuit board is better.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a signal acquisition component of a battery cell and a battery pack. Background Art

[0002] In a battery pack, in order to monitor the usage of the battery cells, it is often necessary to use a collection harness to collect and transmit the signals of the battery cells, such as the voltage signal and temperature signal of the battery cells. In the related art, a harness connector is usually used to aggregate the collection harness, and the harness connector is plugged into the circuit connector on the circuit board to connect the collection harness to the battery management circuit carried by the circuit board.

[0003] However, when the battery pack vibrates (for example, during the production and assembly process, during the transportation of the battery pack, during the driving of a vehicle equipped with the battery pack, etc.), the wiring harness connector and the circuit connector are prone to loosening and poor contact. Utility Model Content

[0004] One purpose of the utility model is to provide a signal acquisition component of a battery cell, which can improve the connection stability between the signal acquisition line and the circuit board.

[0005] Another object of the present invention is to provide a battery pack that can still have good functional stability when vibration occurs.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, a signal acquisition component of a battery cell is provided, comprising:

[0008] A bracket, the bracket having a first side surface and a second side surface opposite to each other along a first direction, the first side surface being used for mounting the battery cell;

[0009] A circuit board, the circuit board is connected to the bracket and is located on the second side, the circuit board is provided with a plurality of plug-in structures, the circuit board carries a battery management circuit, and the battery management circuit is used to be electrically connected to the battery cell;

[0010] A plurality of pin-type electrical connectors, each of which has a first connection portion and a pin-type plug-in portion, wherein the pin-type plug-in portion of each of the pin-type electrical connectors is plugged into each of the plug-in structures in a one-to-one correspondence, and the pin-type plug-in portion is electrically connected to the battery management circuit; and

[0011] A plurality of signal collection lines, each having a second connection portion and a collection portion, the second connection portion of each signal collection line being correspondingly connected to the first connection portion of each pin-type electrical connector, and the collection portion being used to collect signals from the battery cell.

[0012] As a preferred technical solution of the signal acquisition component of the battery cell, the bracket also includes a limiting structure protruding from the second side surface, the needle-type electrical connector is partially disposed in the limiting structure, and at least part of the first connecting portion and the needle-type plug-in portion are exposed to the external environment of the bracket.

[0013] As a preferred technical solution of the signal acquisition component of the battery cell, a side of the circuit board facing the second side surface carries a plurality of electronic components, and along the first direction, the projections of the plurality of electronic components and the limiting structure on the circuit board do not overlap;

[0014] Along the first direction, the height of the limiting structure protruding from the second side surface is h1, and the maximum height of the plurality of electronic components protruding from the circuit board toward the bracket along the first direction is h2, and h1≥h2.

[0015] As a preferred technical solution of the signal acquisition component of the battery cell, the pin-type electrical connector includes a first part and a second part connected at an angle, the first part has the first connecting part, and the first part is arranged on the bracket, and the second part has the pin-type plug-in part.

[0016] As a preferred technical solution of the signal acquisition component of the battery cell, the second side is provided with a plurality of spaced first limiting grooves, and the first limiting groove has a first opening facing the circuit board, each first part is at least partially arranged in the first limiting groove, and the side of the first connecting part facing away from the bottom of the first limiting groove is at least partially exposed to the external environment of the bracket through the first opening.

[0017] As a preferred technical solution of the signal acquisition component of the battery cell, the second part includes a main body connected between the first part and the pin-type plug-in part, the bracket also includes a second limiting part arranged on the second side surface, the second limiting part is provided with a plurality of spaced second limiting grooves, and the second limiting groove has a second opening located on the side of the second limiting part close to the circuit board, each of the main bodies is arranged in each of the second limiting grooves, and the pin-type plug-in part at least partially extends from the second opening toward the circuit board.

[0018] As a preferred technical solution of the signal acquisition component of the battery cell, a plurality of the needle-type electrical connectors are embedded in the bracket.

[0019] As a preferred technical solution of the signal acquisition component of the battery cell, the first connecting portion is located between the bracket and the circuit board.

[0020] As a preferred technical solution for the signal acquisition component of the battery cell, the pin-type connector is also welded to the circuit board and electrically connected to the battery management circuit, or the connector structure also includes an elastic conductive member, which is electrically connected to the battery management circuit and can elastically abut against the pin-type connector.

[0021] As a preferred technical solution of the signal acquisition component of the battery cell, the plurality of signal acquisition lines include a first acquisition line, and the acquisition part of the first acquisition line is connected to the temperature sensing component;

[0022] The bracket has a first accommodating groove arranged on the first side surface, the first accommodating groove is used to accommodate the battery cell, the bracket is also provided with a second accommodating groove connected to the first accommodating groove, and the temperature sensing component is arranged in the second accommodating groove.

[0023] As a preferred technical solution of the signal acquisition component of the battery cell, the bracket has a first accommodating groove arranged on the first side, the first accommodating groove is used to accommodate the battery cell, the bracket has a plurality of the first accommodating grooves, the plurality of the first accommodating grooves are arranged along the second direction, each of the first accommodating grooves is used to accommodate one of the battery cells, the signal acquisition component also includes an electrical connection piece, the electrical connection piece is arranged on the bracket on one side along the third direction corresponding to any two adjacent first accommodating grooves, the electrical connection piece is used to electrically connect the two battery cells respectively located in the corresponding two first accommodating grooves, wherein the first direction, the second direction and the third direction are mutually crossed in pairs;

[0024] The plurality of signal collection lines include a second collection line, wherein the collection portion of the second collection line is connected to the electrical connection sheet and is electrically connected to the electrical connection sheet.

[0025] As a preferred technical solution of the signal acquisition component of the battery cell, one of the electrical connecting piece and the bracket is provided with a clamping hole, and the other of the two is provided with a clamping protrusion corresponding to the clamping hole, and the clamping protrusion can pass through the clamping hole to clamp the electrical connecting piece and the bracket.

[0026] As a preferred technical solution of the signal acquisition component of the battery cell, the signal acquisition component also includes a busbar, the busbar having a first end and a second end opposite to each other, the first end being used to be electrically connected to the battery cell, the second end being electrically connected to the battery management circuit, and the bracket is provided with a first threaded hole, the circuit board is provided with a first through hole corresponding to the first threaded hole, the second end is provided with a second through hole corresponding to the first through hole, a first bolt passes through the second through hole and the first through hole in sequence and is screwed to the first threaded hole to connect the second end and the circuit board to the bracket.

[0027] As a preferred technical solution of the signal acquisition component of the battery cell, the busbar further has an arched bending structure connected between the first end and the second end, and the arched bending structure can undergo elastic deformation.

[0028] In a second aspect, a battery pack is provided, comprising a battery cell and the signal acquisition component as described in the first aspect, wherein the battery cell is installed on the first side.

[0029] The beneficial effects of the utility model are:

[0030] By connecting the circuit board to one side of the bracket along the first direction and directly arranging a plurality of pin-type electrical connectors on the bracket, the pin-type plug-in portion of the pin-type electrical connector can be directly plugged into the plug-in structure of the circuit board, so that the plug-in relationship between the pin-type plug-in portion and the plug-in structure can be kept stable by connecting the circuit board to the bracket. Therefore, when the battery pack vibrates, the pin-type plug-in portion and the plug-in structure can still maintain a relatively stable and effective plug-in relationship, and are not prone to problems such as looseness and poor contact, and the functional stability of the battery pack is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The utility model is further described in detail below based on the drawings and embodiments.

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the signal acquisition component of the battery cell described in the embodiment at a certain angle.

[0033] Figure 2 It is a schematic diagram of the three-dimensional structure of the signal acquisition component of the battery cell described in the embodiment at another angle.

[0034] Figure 3 It is a schematic top view of the signal acquisition component of the battery cell described in the embodiment.

[0035] Figure 4 for Figure 2 Schematic diagram of the structural decomposition of the signal acquisition components of the battery cell shown in.

[0036] Figure 5 for Figure 4 A schematic diagram of the three-dimensional structure of the needle-type electrical connector, signal collection line and temperature sensing component is shown in FIG.

[0037] Figure 6 for Figure 3 AA section view.

[0038] Figure 7 for Figure 3 Middle BB section view.

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the battery pack described in the embodiment.

[0040] In the figure:

[0041] 1. Signal acquisition assembly; 10. Bracket; 101. First side; 102. Second side; 102a. First bolt; 102b. Second bolt; 103. First receiving groove; 104. Position limiting structure; 1041. First position limiting groove; 1041a. First opening; 1042. Second position limiting part; 1042a. Second position limiting groove; 1042b. Second opening; 1043. First position limiting part; 105. Second receiving groove; 106. Card convex; 11. Circuit board; 110. Plug structure; 111, electronic components; 12, pin-type electrical connector; 121, first part; 1210, first connection part; 122, second part; 1220, pin-type plug-in part; 1221, main body; 13, signal acquisition line; 130, second connection part; 131, acquisition part; 13a, first acquisition line; 13b, second acquisition line; 14, busbar; 141, first end; 142, second end; 143, arched bending structure; 15, electrical connector; 150, card hole; 16, temperature sensing part;

[0042] 2. Battery pack; 20. Battery cell. DETAILED DESCRIPTION

[0043] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0044] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] like Figures 1 to 5 As shown, the utility model provides a signal acquisition component 1 of a battery cell, including a bracket 10, a circuit board 11, a plurality of pin-type electrical connectors 12 and a plurality of signal acquisition lines 13. The bracket 10 has a first side surface 101 and a second side surface 102 that are opposite to each other along a first direction S1. The first side surface 101 is used to install the battery cell. The circuit board 11 is connected to the bracket 10 and is located on the second side surface 102. The circuit board 11 is provided with a plurality of plug-in structures 110. The circuit board 11 carries a battery management circuit, which is used to be electrically connected to the battery cell. The pin-type electrical connector 12 has a There are a first connection part 1210 and a pin-type plug-in part 1220, and a plurality of first connection parts 1210 are arranged at intervals on the bracket 10. The pin-type plug-in parts 1220 of each pin-type electrical connector 12 are plugged into each plug-in structure 110 one by one, and the pin-type plug-in part 1220 is electrically connected to the battery management circuit. The signal collection line 13 has a second connection part 130 and a collection part 131. The second connection part 130 of each signal collection line 13 is correspondingly connected to the first connection part 1210 of each pin-type electrical connector 12, and the collection part 131 is used to collect the signal of the battery cell, wherein, Figure 1 , Figure 2 , Figure 4 and Figure 5 The first direction S1 is shown by an arrow.

[0047] By connecting the circuit board 11 to one side of the bracket 10 along the first direction S1, and directly arranging a plurality of pin-type electrical connectors 12 on the bracket 10, the pin-type plug-in portion 1220 of the pin-type electrical connector 12 can be directly plugged into the plug-in structure 110 of the circuit board 11, so that the plug-in relationship between the pin-type plug-in portion 1220 and the plug-in structure 110 can be kept stable by connecting the circuit board 11 to the bracket 10. When the battery pack vibrates, the pin-type plug-in portion 1220 and the plug-in structure 110 can still maintain a relatively stable and effective plug-in relationship, and are not prone to problems such as looseness and poor contact, thereby improving the functional stability of the battery pack.

[0048] It can be 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.

[0049] Optionally, the signal acquisition component 1 also includes two bus bars 14, the bus bars 14 have a first end 141 and a second end 142 relative to each other, the first end 141 is used to be electrically connected to a plurality of series or parallel battery cells as an output electrode of an output battery cell, and the second end 142 is electrically connected to a battery management circuit, so that the battery cells carried by the bracket 10 can be connected to the battery management circuit as a whole through the two bus bars 14.

[0050] Preferably, the bracket 10 is provided with a first threaded hole, the circuit board 11 is provided with a first through hole corresponding to the first threaded hole, the second end 142 is provided with a second through hole corresponding to the first through hole, the first bolt 102a passes through the second through hole and the first through hole in sequence and is screwed to the first threaded hole to connect the second end 142 and the circuit board 11 to the bracket 10, so that the second end 142, the circuit board 11 and the bracket 10 can be connected and fixed in a limited position by screwing the first bolt 102a to the first threaded hole.

[0051] Optionally, the busbar 14 further has an arched bending structure 143 connected between the first end 141 and the second end 142, and the arched bending structure 143 can be elastically deformed so that the relative position between the first end 141 and the second end 142 can be changed to a certain extent, thereby facilitating the first end 141 to be correspondingly connected to the battery cell carried by the bracket 10. In particular, when the second end 142 is connected to the bracket 10 by the first bolt 102a as described in the aforementioned technical solution, since the relative position of the second end 142 and the bracket 10 is relatively fixed, the relative position of the first end 141 and the bracket 10 can be changed to a certain extent by elastically deforming the arched bending structure 143, thereby playing a buffering role, so that the first end 141 can be conveniently connected to the battery cell carried by the bracket 10.

[0052] Optionally, the bracket 10 is also provided with a second threaded hole, and the circuit board 11 is also provided with a third through hole corresponding to the second threaded hole. The second bolt 102b passes through the third through hole and is screwed to the second threaded hole to connect the circuit board 11 to the bracket 10, so that the second bolt 102b can be screwed to the second threaded hole to connect the circuit board 11 and fix it in a limited position, thereby increasing the connection and limited position of the circuit board 11 with the bracket 10, so as to further improve the relative position stability of the circuit board 11 and the bracket 10 after the circuit board 11 is assembled on the bracket 10, thereby further improving the stability of the plug-in relationship between the pin-type plug-in portion 1220 and the plug-in structure 110.

[0053] Optionally, the bracket 10 has a first receiving groove 103 located on the first side surface 101 , and the first receiving groove 103 can be used to receive the battery cell.

[0054] Preferably, the bracket 10 has a plurality of first accommodating grooves 103, and the plurality of first accommodating grooves 103 are arranged along the second direction S2, and each first accommodating groove 103 is used to accommodate a battery cell, so that the bracket 10 can be used to accommodate a plurality of battery cells, wherein the second direction S2 intersects the first direction S1. Figures 1 to 5 The second direction S2 is shown by an arrow.

[0055] Furthermore, the signal acquisition component 1 also includes an electrical connection sheet 15, which may be a copper bar or an aluminum bar. The electrical connection sheet 15 is arranged on the bracket 10 on one side along the third direction S3 corresponding to any two adjacent first receiving slots 103. The electrical connection sheet 15 is used to electrically connect two battery cells respectively located in the corresponding two first receiving slots 103, so as to connect multiple battery cells carried by the bracket 10 in series or in parallel through the electrical connection sheet 15, or connect some of the multiple battery cells in series and some of the battery cells in parallel, wherein the first direction S1, the second direction S2 and the third direction S3 intersect with each other in pairs. Figures 1 to 5 The third direction S3 is shown by an arrow in FIG. Figure 1 , Figure 2 , Figure 4 and Figure 5 1 and 2 show the first direction S1, the second direction S2 and the third direction S3 in coordinates. For example, the first direction S1, the second direction S2 and the third direction S3 may be perpendicular to each other.

[0056] Optionally, one of the electrical connection piece 15 and the bracket 10 may be provided with a clamping hole 150, and the other of the two may be provided with a clamping protrusion 106 corresponding to the clamping hole 150, that is, the electrical connection piece 15 may be provided with a clamping hole 150, and the bracket 10 may be provided with a clamping protrusion 106 corresponding to the clamping hole 150, or the bracket 10 may be provided with a clamping hole 150, and the electrical connection piece 15 may be provided with a clamping protrusion 106 corresponding to the clamping hole 150, and the clamping protrusion 106 can pass through the clamping hole 150 to enable the electrical connection piece 15 to be clamped with the bracket 10, so that during the assembly process of the signal acquisition component 1, the relative positions of the electrical connection piece 15 and the bracket 10 can be relatively fixed, so that the signal acquisition component 1 can be assembled into an integral structure.

[0057] Preferably, the protrusion 106 can be a hot riveting column. For example, the protrusion 106 can be made of a plastic material that can melt at high temperature. After the protrusion 106 is passed through the corresponding hole 150, the end of the protrusion 106 can be hot pressed to rivet the protrusion 106 to the electrical connecting piece 15, thereby further fixing the electrical connecting piece 15 to the bracket 10.

[0058] Optionally, the plug-in structure 110 may include a plug-in hole or a plug-in slot, so that the pin-type plug-in portion 1220 can be plugged into the plug-in structure 110 by being plugged into the plug-in hole or the plug-in slot. The pin-type electrical connector 12 may be a PIN pin, and since the setting and installation space occupied by the structure of the PIN pin and the plug-in hole or the plug-in slot is smaller than the setting and installation space occupied by the male and female docking plug structure such as the wiring harness connector and the circuit connector in the prior art, the matching structure of the pin-type plug-in portion 1220 and the plug-in structure 110 can make the overall structure of the signal acquisition component 1 more compact, which is beneficial to further improve the energy density of the battery pack including the signal acquisition component 1.

[0059] In order to make it easy to maintain a stable electrical connection relationship between the needle-type plug-in part 1220 and the battery management circuit, so as to improve the stability of the signal acquisition function of the signal acquisition component 1, optionally, the needle-type plug-in part 1220 is also welded to the circuit board 11, and the needle-type plug-in part 1220 is electrically connected to the battery management circuit through solder, and the solder wraps around the end face of the plug-in structure 110 and extends into the gap between the plug-in structure 110 and the needle-type plug-in part 1220, or, the plug-in structure 110 also includes an elastic conductive part, which may include but is not limited to a conductive spring sheet, a spring, etc., and the elastic conductive part is electrically connected to the battery management circuit, and the elastic conductive part can elastically abut against the needle-type plug-in part 1220, so that the needle-type plug-in part 1220 is electrically connected to the battery management circuit through the elastic conductive part while being plugged into the plug hole.

[0060] Please combine Figure 6As shown, optionally, the needle-type electrical connector 12 includes a first part 121 and a second part 122 connected at an angle, the first part 121 having a first connecting portion 1210, and the first part 121 is arranged on the bracket 10, and the second part 122 has a needle-type plug-in portion 1220, so that on the one hand, the effective connection area between the first part 121 and the second side surface 102 of the bracket 10 can be made larger, so that the connection relationship between the needle-type electrical connector 12 and the bracket 10 is more stable, and on the other hand, the second part 122 can be bent relative to the first part 121 toward the circuit board 11, so that the needle-type plug-in portion 1220 can extend away from the bracket 10 along the first direction S1, so that the needle-type plug-in portion 1220 can be plugged into the plug-in structure 110.

[0061] Preferably, the second part 122 can be a sheet-like structure, so that the surface area of ​​the second part 122 is larger. On the one hand, it can further improve the effective connection area between the second part 122 and the bracket 10, so as to further improve the connection stability between the needle-type electrical connector 12 and the bracket 10. On the other hand, it can make the outer surface area of ​​the first connection part 1210 larger, and 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.

[0062] Optionally, the first connecting portion 1210 may be located between the bracket 10 and the circuit board 11. In other words, along the first direction S1, the projection of the first connecting portion 1210 on the second side surface 102 is located within the projection range of the circuit board 11 on the second side surface 102, so that the pin-type plug-in portion 1220 of the pin-type electrical connector 12 can be directly plugged into the plug-in structure 110 of the circuit board 11 along the first direction S1. Therefore, on the one hand, the first connecting portion 1210 can be shielded from two opposite sides of the first connecting portion 1210 along the first direction S1 by the bracket 10 and the circuit board 11, respectively, so as to form a certain protection effect on the connection structure between the first connecting portion 1210 and the second connecting portion 130, so that the first connecting portion 1210 and the second connecting portion 130 can be more easily maintained in a stable connection relationship. On the other hand, the first connecting portion 1210, the bracket 10 and the circuit board 11 can be made more compact, thereby making the overall structure of the signal acquisition component 1 more compact and reasonable.

[0063] In other embodiments, along the first direction S1, the projection of the first connecting portion 1210 on the second side surface 102 may also be outside the projection range of the circuit board 11 on the second side surface 102, or, along the first direction S1, the projection of the first connecting portion 1210 on the second side surface 102 may also partially overlap with the projection of the circuit board 11 on the second side surface 102.

[0064] Optionally, a plurality of pin-type electrical connectors 12 may be embedded in the bracket 10 , thereby enabling better connection stability between the bracket 10 and the pin-type electrical connectors 12 .

[0065] Exemplarily, the entire bracket 10 can be made of plastic material, and the bracket 10 can be injection molded with multiple pin-type electrical connectors 12, so that the molding process of the bracket 10 and the process of embedding the multiple pin-type electrical connectors 12 in the bracket 10 can be completed in one step, which can make the manufacturing process of the signal acquisition component 1 simpler.

[0066] Optionally, the bracket 10 also includes a limiting structure 104 protruding from the second side surface 102, and the needle-type electrical connector 12 is partially disposed in the limiting structure 104, and at least the first connecting portion 1210 and the needle-type plug-in portion 1220 are exposed to the external environment of the bracket 10, so that the relative position of the needle-type electrical connector 12 and the bracket 10 can be limited by the limiting structure 104, and at the same time, the limiting structure 104 will not affect the connection between the needle-type electrical connector 12 and the second connecting portion 130 and the plug-in structure 110 respectively.

[0067] Optionally, the side of the circuit board 11 facing the second side 102 carries a plurality of electronic components 111, and along the first direction S1, the projections of the plurality of electronic components 111 and the limiting structure 104 on the circuit board 11 do not overlap. In other words, the plurality of electronic components 111 and the limiting structure 104 located between the circuit board 11 and the second side 102 are staggered, which can make the arrangement of the plurality of electronic components 111 and the limiting structure 104 more compact and more effectively utilize the space between the circuit board 11 and the second side 102, thereby making the spacing between the circuit board 11 and the second side 102 along the first direction S1 smaller, so that the signal acquisition component 1 can achieve a more miniaturized design, which is beneficial to improving the energy density of the battery pack including the signal acquisition component 1 provided in this embodiment.

[0068] Along the first direction S1, the height of the limiting structure 104 protruding from the second side surface 102 is h1, and the maximum height of the plurality of electronic components 111 as a whole along the first direction S1 is h2. Preferably, the height h1 and the height h2 can satisfy: h1 ≥ h2, so that when the needle-type plug-in portion 1220 is plugged into the plug-in structure 110, the circuit board 11 can abut against the protruding top of the limiting structure 104, so that the limiting structure 104 has a better limiting and protective effect on the needle-type electrical connector 12.

[0069] When, as described in the aforementioned technical solution, the needle-type electrical connector 12 includes a first part 121 and a second part 122 connected at an angle, optionally, the second side surface 102 is provided with a plurality of spaced first limiting grooves 1041, and the first limiting grooves 1041 have a first opening 1041a facing the circuit board 11, each first part 121 is at least partially disposed in the first limiting groove 1041, and a side of the first connecting portion 1210 away from the bottom of the first limiting groove 1041 is at least partially exposed to the external environment of the bracket 10 through the first opening 1041a, so that the relative position of the first part 121 and the bracket 10 can be limited by the first limiting groove 1041, so that the relative position of the needle-type electrical connector 12 as a whole and the bracket 10 can be more easily maintained stable, and at the same time, the first connecting portion 1210 is exposed through the first opening 1041a, so that the first connecting portion 1210 can be connected to the second connecting portion 130 of the signal acquisition line 13 routed from the outside of the bracket 10.

[0070] Optionally, the first limiting groove 1041 may be directly provided on the second side surface 102 , or the bracket 10 further includes a first limiting portion 1043 provided on the second side surface 102 (ie, the limiting structure 104 may include a first limiting portion 1043 ), and the first limiting portion 1043 is provided with a plurality of spaced first limiting grooves 1041 .

[0071] Optionally, the second portion 122 includes a main body 1221 connected between the first portion 121 and the pin-type plug-in portion 1220, and the bracket 10 also includes a second limiting portion 1042 disposed on the second side surface 102 (that is, the limiting structure 104 may include a second limiting portion 1042), and the second limiting portion 1042 is provided with a plurality of spaced second limiting grooves 1042a, and the second limiting groove 1042a has a second opening 1042b located on one side of the second limiting portion 1042 close to the circuit board 11, and each main body 1221 is disposed on In each second limiting groove 1042a, the needle-type plug-in portion 1220 at least partially extends from the second opening 1042b toward the circuit board 11, so that the relative position of the main body 1221 and the bracket 10 can be limited by the second limiting portion 1042, so that the relative position of the needle-type electrical connector 12 as a whole and the bracket 10 can be more easily maintained stable. At the same time, the second opening 1042b is used for the needle-type plug-in portion 1220 to extend out, so that the needle-type plug-in portion 1220 can be plugged into the plug-in structure 110 on the circuit board 11 along the first direction S1.

[0072] Preferably, the second side surface 102 of the bracket 10 can be provided with the first limiting portion 1043 described in the aforementioned technical scheme and the second limiting portion 1042 described in the aforementioned technical scheme (that is, the limiting structure 104 can include the first limiting portion 1043 described in the aforementioned technical scheme and the second limiting portion 1042 described in the aforementioned technical scheme). At this time, the first limiting groove 1041 is connected to the second limiting groove 1042a so that the first part 121 and the main body 1221 can be connected. Such an arrangement can make the position distribution of the limiting effect of the limiting structure 104 on the needle-type electrical connector 12 wider, thereby making the limiting effect of the limiting structure 104 on the needle-type electrical connector 12 better, and the relative position stability of the needle-type electrical connector 12 as a whole and the bracket 10 better.

[0073] It is understandable that in order to monitor the usage of the battery cells, it is usually necessary to collect the temperature signal and / or voltage signal of the battery cells.

[0074] Please combine Figure 7 As shown, based on this, when the signal acquisition component 1 can be used to collect the temperature signal of the battery cell, optionally, the multiple signal acquisition lines 13 include a first acquisition line 13a, and the acquisition part 131 of the first acquisition line 13a is connected to the temperature sensing component 16. The bracket 10 is also provided with a second receiving slot 105 connected to the first receiving slot 103. The temperature sensing component 16 may include but is not limited to a thermistor and an infrared temperature sensor. The temperature sensing component 16 is arranged in the second receiving slot 105, and can collect the signal emitted by the temperature sensing component 16 due to the temperature change in the nearby environment through the first acquisition line 13a and transmit it to the battery management circuit, so that the battery management circuit can obtain the temperature change of the environment in the first receiving slot 103 and the second receiving slot 105 near the temperature sensing component 16.

[0075] When the temperature sensing component 16 includes a thermistor, optionally, the collecting parts 131 of the two first collecting lines 13a can be respectively connected to the same temperature sensing component 16, so that the two first collecting lines 13a can be connected to the temperature sensing component 16 to form a loop, so that the current change at both ends of the temperature sensing component 16 can be collected through the two first collecting lines 13a, so that the battery management circuit can calculate the resistance change of the temperature sensing component 16, and thus the temperature change of the temperature sensing component 16 can be inferred, and then the temperature change of the environment in the first containing tank 103 and the second containing tank 105 near the temperature sensing component 16 can be obtained.

[0076] As described in the aforementioned technical solution, in order to enable the bracket 10 to be used to accommodate multiple battery cells, the bracket 10 can have multiple first accommodating grooves 103, and the multiple first accommodating grooves 103 are arranged along the second direction S2, wherein the second direction S2 is perpendicular to the first direction S1, so that when each first accommodating groove 103 accommodates a battery cell, it is easy to form a heat accumulation area in the middle of the bracket 10 along the second direction S2. In other words, it is easy to make the local temperature of the middle of the bracket 10 along the second direction S2 the highest. At this time, preferably, at least one second accommodating groove 105 can be roughly located in the middle of the bracket 10 along the second direction S2, so that at least one temperature sensing component 16 is roughly located in the middle of the bracket 10 along the second direction S2, and then the temperature sensing component 16 can cooperate with the first acquisition line 13a to roughly monitor the highest local temperature of the bracket 10.

[0077] Since the position of the bracket 10 close to the outside along the second direction S2 has the highest heat exchange efficiency with the external environment, it is easy to make the local temperature of the bracket 10 at that position the lowest. Based on this, further, a second accommodating groove 105 can be provided at the position of the bracket 10 close to the outside along the second direction S2, so that the temperature sensing component 16 located in the second accommodating groove 105 can cooperate with the first acquisition line 13a to roughly monitor the lowest local temperature of the bracket 10.

[0078] Based on this, when the signal acquisition component 1 can be used to collect the voltage signal of the battery cell, optionally, the multiple signal acquisition lines 13 include a second acquisition line 13b, and the second acquisition line 13b is electrically connected to the battery cell to be able to collect the electrical signal of the battery cell, and then can cooperate with the two battery management circuits electrically connected to the battery cell as a whole carried by the bracket 10 to enable the signal acquisition component 1 to collect the voltage signal of the battery cell.

[0079] As described in the aforementioned technical solution, when the signal acquisition component 1 also includes an electrical connection sheet 15, preferably, the acquisition portion 131 of the second acquisition line 13b can be connected to the electrical connection sheet 15 and electrically conductive with the electrical connection sheet 15, so that the acquisition portion 131 can be connected to the electrical connection sheet 15 when the signal acquisition component 1 is assembled, without having to be connected to the battery cell after the battery cell is arranged in the first receiving groove 103, wherein the acquisition portion 131 can be connected to the electrical connection sheet 15 and electrically conductive with the electrical connection sheet 15 by methods including but not limited to welding, bolt connection, etc.

[0080] It can be understood that when the signal acquisition component 1 can be used to acquire temperature signals and voltage signals of the battery cell, the multiple signal acquisition lines 13 can simultaneously include the first acquisition line 13a and the second acquisition line 13b as described in the above technical solution.

[0081] like Figure 8As shown, the utility model also provides a battery pack 2, including a battery cell 20 and a signal acquisition component 1 as described in the above technical solution. Figure 1 As shown, the battery cell 20 is installed on the first side 101. Since the connection stability between the signal acquisition line 13 of the signal acquisition component 1 and the circuit board 11 is better, the battery pack 2 can still have good functional stability when vibration occurs.

[0082] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0083] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0084] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0085] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A signal acquisition component for a battery cell, It is characterized in that include: A bracket, the bracket having a first side surface and a second side surface opposite to each other along a first direction, the first side surface being used for mounting the battery cell; A circuit board, the circuit board is connected to the bracket and is located on the second side, the circuit board is provided with a plurality of plug-in structures, the circuit board carries a battery management circuit, and the battery management circuit is used to be electrically connected to the battery cell; A plurality of pin-type electrical connectors, each of which has a first connection portion and a pin-type plug-in portion, wherein the pin-type plug-in portion of each of the pin-type electrical connectors is plugged into each of the plug-in structures in a one-to-one correspondence, and the pin-type plug-in portion is electrically connected to the battery management circuit; and A plurality of signal collection lines, each having a second connection portion and a collection portion, the second connection portion of each signal collection line being correspondingly connected to the first connection portion of each pin-type electrical connector, and the collection portion being used to collect signals from the battery cell.

2. The signal acquisition component of the battery cell according to claim 1, It is characterized in that The bracket further includes a limiting structure protruding from the second side surface, the pin-type electrical connector is partially disposed in the limiting structure, and at least a portion of the first connecting portion and the pin-type plug-in portion are exposed to the external environment of the bracket.

3. The signal acquisition component of the battery cell according to claim 2, It is characterized in that A side of the circuit board facing the second side surface carries a plurality of electronic components, and along the first direction, projections of the plurality of electronic components and the limiting structure on the circuit board do not overlap; Along the first direction, the height of the limiting structure protruding from the second side surface is h1, and the maximum height of the plurality of electronic components protruding from the circuit board toward the bracket along the first direction is h2, and h1≥h2.

4. The signal acquisition component of the battery cell according to claim 1, It is characterized in that The pin-type electrical connector includes a first part and a second part connected at an angle, the first part has the first connecting portion, and the first part is arranged on the bracket, and the second part has the pin-type plug-in portion.

5. The signal acquisition component of the battery cell according to claim 4, It is characterized in that The second side surface is provided with a plurality of spaced first limiting grooves, and the first limiting groove has a first opening facing the circuit board, each first part is at least partially arranged in the first limiting groove, and the side of the first connecting part away from the bottom of the first limiting groove is at least partially exposed to the external environment of the bracket through the first opening.

6. The signal acquisition component of the battery cell according to claim 4, It is characterized in that The second part includes a main body connected between the first part and the pin-type plug-in part, and the bracket also includes a second limiting part arranged on the second side surface, the second limiting part is provided with a plurality of spaced second limiting grooves, and the second limiting groove has a second opening located on a side of the second limiting part close to the circuit board, each of the main bodies is arranged in each of the second limiting grooves, and the pin-type plug-in part at least partially extends from the second opening toward the circuit board.

7. The signal acquisition component of the battery cell according to any one of claims 1 to 6, It is characterized in that A plurality of the pin-type electrical connectors are embedded in the bracket.

8. The signal acquisition component of the battery cell according to any one of claims 1 to 6, It is characterized in that The first connecting portion is located between the bracket and the circuit board.

9. The signal acquisition component of the battery cell according to any one of claims 1 to 6, It is characterized in that The pin-type plug-in portion is also welded to the circuit board and electrically connected to the battery management circuit, or the plug-in structure further includes an elastic conductive member, which is electrically connected to the battery management circuit and can elastically abut against the pin-type plug-in portion.

10. The signal acquisition component of the battery cell according to any one of claims 1 to 6, It is characterized in that The plurality of signal acquisition lines include a first acquisition line, wherein the acquisition portion of the first acquisition line is connected to a temperature sensing component; The bracket has a first accommodating groove arranged on the first side surface, the first accommodating groove is used to accommodate the battery cell, the bracket is also provided with a second accommodating groove connected to the first accommodating groove, and the temperature sensing component is arranged in the second accommodating groove.

11. The signal acquisition component of the battery cell according to any one of claims 1 to 6, It is characterized in that The bracket has a first accommodating groove provided on the first side surface, the first accommodating groove is used to accommodate the battery cell, the bracket has a plurality of the first accommodating grooves, the plurality of the first accommodating grooves are arranged along the second direction, each of the first accommodating grooves is used to accommodate one of the battery cells, the signal acquisition component further comprises an electrical connection sheet, the electrical connection sheet is provided on the bracket corresponding to one side of any two adjacent first accommodating grooves along the third direction, the electrical connection sheet is used to electrically connect the two battery cells respectively located in the corresponding two first accommodating grooves, wherein the first direction, the second direction and the third direction intersect with each other in pairs; The plurality of signal collection lines include a second collection line, wherein the collection portion of the second collection line is connected to the electrical connection sheet and is electrically connected to the electrical connection sheet.

12. The signal acquisition component of the battery cell according to claim 11, It is characterized in that One of the electrical connection piece and the bracket is provided with a clamping hole, and the other of the two is provided with a clamping protrusion corresponding to the clamping hole, and the clamping protrusion can pass through the clamping hole to clamp the electrical connection piece and the bracket.

13. The signal acquisition component of the battery cell according to any one of claims 1 to 6, It is characterized in that The signal acquisition component also includes a bus bar, which has a first end and a second end opposite to each other, the first end is used to be electrically connected to the battery cell, and the second end is electrically connected to the battery management circuit, and the bracket is provided with a first threaded hole, the circuit board is provided with a first through hole corresponding to the first threaded hole, and 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 in sequence and is screwed to the first threaded hole to connect the second end and the circuit board to the bracket.

14. The signal acquisition component of the battery cell according to claim 13, It is characterized in that The busbar further has an arched bending structure connected between the first end and the second end, and the arched bending structure can undergo elastic deformation.

15. A battery pack, It is characterized in that It comprises a battery cell and a signal acquisition component as described in any one of claims 1 to 14, wherein the battery cell is installed on the first side.

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