Sampling circuit board, battery pack and electric equipment

Abstract

The utility model provides a sampling circuit board, a battery pack and electric equipment, the sampling circuit board comprises a sampling board body, the sampling board body is provided with a wire holder, a plurality of safety parts and a sampling terminal used for being electrically connected with a tab, and the wire holder is located in the middle area of the sampling board body and used for plugging a wiring cable; the plurality of safety parts are arranged on the two sides or the periphery of the wire holder; a plurality of grooves are further formed in the sampling plate body and comprise first grooves distributed in the periphery of each safety part, and the first grooves extend in the circumferential direction of the safety parts and at least surround parts of the safety parts. According to the sampling circuit board provided by the invention, the deformation stress of the sampling circuit board caused by high welding temperature is reduced through the structural arrangement, the protection on the safety part is enhanced, and the problem that the safety part is easy to be snapped by the stress caused by the high temperature in the welding process is solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a sampling circuit board, a battery pack including the sampling circuit board, and an electrical device. Background Technology

[0002] A battery pack typically consists of multiple cell modules, each containing multiple cell units. The tabs of these cell units are connected in series or parallel, and then connected to the BMS control board via a total positive and a total negative terminal. Safety components and other parts are soldered onto the sampling circuit board used to collect the voltage and current of the cells. The high temperatures generated during soldering can cause stress deformation on the sampling circuit board. If the soldering process applies excessive pressure to the safety components, they may break. Utility Model Content

[0003] In view of this, this application aims to provide a sampling circuit board that reduces the deformation stress caused by the high temperature of soldering through structural design, enhances the protection of safety components, and solves the problem that safety components are easily broken by stress caused by high temperature during the soldering process.

[0004] This application provides a sampling circuit board, including a sampling board body, which is provided with a terminal block, multiple safety components, and sampling terminals for electrical connection with the electrode tabs.

[0005] The terminal block is located in the middle area of ​​the sampling plate body and is used to plug in the wiring cable; the multiple safety components are arranged on both sides or the outer periphery of the terminal block;

[0006] The sampling plate body is also provided with a first groove distributed on the outer periphery of each of the safety components, the first groove extending along the circumference of the safety component and at least surrounding a part of the safety component.

[0007] In one possible implementation, the first groove is through-hole in the thickness direction of the sampling plate body.

[0008] In one possible implementation, the terminal block includes a main body and an external protrusion extending from one side of the main body, the width of the external protrusion being smaller than the width of the main body.

[0009] In one possible implementation, the first groove comprises a first groove segment, a second groove segment, and a third groove segment connected in sequence and is U-shaped in general, with the first groove segment, the second groove segment, and the third groove segment distributed on three sides of the safety component in the circumferential direction.

[0010] In one possible implementation, the plurality of safety components are distributed around the terminal block, with the U-shaped opening of the first groove facing the terminal block.

[0011] In one possible implementation, the first groove segment of the first groove is located on the first side of the safety member, extends from one end of the first side of the safety member toward the other end of the first side, and at least exceeds the length center of the first side;

[0012] And / or, the third groove segment of the first groove is located on the third side of the safety member, extends from one end of the third side of the safety member toward the other end of the third side, and at least exceeds the length center of the third side;

[0013] And / or, the connection between the first slot segment and the second slot segment is arc-shaped;

[0014] And / or, the connection between the second slot segment and the third slot segment is arc-shaped.

[0015] In one possible implementation, the sampling plate body includes:

[0016] The middle part is provided with the terminal block, and multiple sampling terminals arranged along the second direction are provided on both sides of the middle part in the first direction.

[0017] The sampling section is located on both sides of the middle section in a first direction and has a distance from the middle section, extends along a second direction and is provided with a plurality of sampling terminals arranged along the second direction;

[0018] A connecting portion extends along the first direction and connects the sampling portion and the intermediate portion;

[0019] An outer portion extends along the first direction and is located on the side of the sampling portion away from the middle portion;

[0020] The connecting part, the sampling part, and the intermediate part together form an exhaust hole.

[0021] In one possible implementation, on the middle portion, each of the first grooves is disposed near the connection end of the sampling terminal connected to the middle portion, and at least partially, the first groove is located between the connection end of the safety member and the sampling terminal.

[0022] In one possible implementation, a plurality of second grooves are also included, with at least one second groove provided at the connection end of the sampling terminal on the sampling section; the second groove includes three groove segments connected in sequence and is U-shaped as a whole.

[0023] In one possible implementation, the shortest distance from the first groove to the sampling terminal connection end is 1.5-3.5 mm;

[0024] And / or, the distance from the second groove segment of the first groove to the terminal block is 8-12 mm.

[0025] This application also provides a battery pack, including battery cells, a BMS control board, and a sampling circuit board as described in any of the above claims. The battery cell assembly includes a plurality of arranged battery cell units. The sampling circuit board is laid on top of the battery cell assembly and connected to the tabs of the plurality of battery cell units through the sampling terminals. The terminal block is connected to the BMS control board through wiring cables.

[0026] In one possible implementation, the sampling plate body includes a middle portion and vent holes located on both sides of the middle portion in a first direction, and a first gap space is provided between two adjacent battery cells in a second direction. The first gap space is partially filled with foam and vent channels are formed on both sides of the foam in the first direction. The projection of the vent holes in the height direction partially overlaps with at least one of the vent channels.

[0027] In one possible implementation, the tabs of two adjacent battery cells in the second direction are connected by a connecting strip, and the acquisition end of the sampling terminal is connected to the connecting strip; the projection of the vent in the height direction covers at least two of the connecting strips and a second gap space located between the two connecting strips, the second gap space being opposite to one of the vent channels.

[0028] This application also provides an electrical device, including a sampling circuit board as described in any of the preceding claims or a battery pack as described in any of the preceding claims.

[0029] The sampling circuit board provided in this application is equipped with a terminal block and multiple safety components, and a first groove is formed on the outer periphery of each safety component. First, the first groove is provided at each safety component, and the first groove extends along the outer periphery of the safety component. When soldering, the first groove provides deformation space for the board body deformation caused by the high temperature of soldering, which can significantly reduce the compressive or tensile force on the safety component, enhance the safety of the safety component, and solve the problem that the safety component is easily broken. Second, the terminal block is located in the middle area of ​​the sampling board body, and the safety components are located on the line connecting the sampling terminal to the terminal block. The safety components are distributed on both sides or the outer periphery of the terminal block, that is, the first groove is also distributed on both sides or the outer periphery of the terminal block, with high uniformity of distribution. The structure of the entire sampling board body is uniform. In addition, the groove has the effect of offsetting stress and deformation, thereby improving the quality and durability of the sampling board body. Attached Figure Description

[0030] Figure 1 The diagram shown is a schematic diagram of the sampling circuit board and the battery cell at a first angle in an embodiment of this application.

[0031] Figure 2 The diagram shown is a schematic diagram of the second angle structure of the sampling circuit board and the battery cell in an embodiment of this application;

[0032] Figure 3 The diagram shown is a schematic diagram of the first angle of the sampling circuit board in an embodiment of this application;

[0033] Figure 4 The diagram shown is a schematic representation of the second angle of the sampling circuit board in an embodiment of this application;

[0034] Figure 5 The diagram shown is a schematic representation of the arrangement of the first groove and the safety component on the middle part in an embodiment of this application.

[0035] Figure 6 The diagram shown is a schematic representation of the first groove in an embodiment of this application.

[0036] Figures 1-6 middle:

[0037] 1. Battery cell assembly; 11. Battery cell unit; 12. Connecting bar; 101. First gap space; 102. Venting channel; 103. Second gap space;

[0038] 2. Sampling plate body; 21. Middle part; 22. Sampling part; 23. Connecting part; 24. External part; 201. First groove; 202. Second groove; 203. Vent hole; 204. First notch; 205. Second notch;

[0039] 3. Sampling terminal; 31. Connecting end; 4. Terminal block; 41. Main body; 42. Outward protrusion; 5. Safety component; 6. Foam. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] Please refer to the attached document. Figures 1-6This application provides a sampling circuit board, including a sampling board body 2. The sampling board body 2 is provided with a terminal block 4, multiple safety components 5, and sampling terminals 3 for electrical connection with electrode tabs. The sampling terminals 3 are used to collect information such as voltage and current, and transmit it to the BMS system of the battery pack through the sampling board body 2. The terminal block 4 is located in the middle area of ​​the sampling board body 2 and is used to plug in wiring cables. After the sampling circuit board is assembled into the battery pack, the distance from the terminal block 4 to the two battery cell modules is the same, which can reduce the voltage division effect of electrical connection during the collection process and avoid affecting the sampling accuracy of the individual cell voltages located at both ends of the terminal block 4. Furthermore, the terminal block 4 is connected to the BMS control board of the battery pack through the plugging in of wiring cables. The sampling board body 2 is assembled by setting the terminal block 4, which has the effect of improving the convenience of assembly and disassembly, ensuring connection quality, and improving the stability of information collection.

[0042] Safety element 5 is located on the line connecting sampling terminal 3 to terminal block 4, and can be a fuse or other similar component. Safety element 5 is distributed on both sides or the outer periphery of terminal block 4, facilitating line layout and avoiding excessive bends. Furthermore, the distribution structure of terminal block 4 and multiple safety elements 5 improves the overall strength uniformity of the sampling plate body 2, preventing localized weak points. In some embodiments, safety element 5 is a fuse.

[0043] Meanwhile, in this application, the sampling plate body 2 is also provided with a first groove 201 distributed around the outer periphery of each safety component 5. The first groove 201 extends circumferentially along the safety component 5 and at least surrounds a portion of the safety component 5. That is, at least each safety component 5 has a groove on its outer periphery, and other areas of the sampling plate body 2 can also be provided with grooves. Thus, when welding, the first groove 201 provides deformation space for the plate deformation caused by the high temperature of welding, which can significantly reduce the compressive or tensile force on the safety component 5, enhance the safety of the safety component 5, and solve the problem that the safety component 5 is easily broken. Moreover, since the terminal block 4 is located in the middle area of ​​the sampling plate body 2, and the safety components 5 are distributed on both sides or the outer periphery of the terminal block 4, that is, the first groove 201 is also distributed on both sides or the outer periphery of the terminal block 4. The distribution uniformity of the first groove 201 is high, and the structure of the entire sampling plate body 2 is uniform. In addition, the first groove 201 offsets the stress and deformation caused by high temperature welding, which is conducive to improving the quality and durability of the sampling plate body 2.

[0044] As can be seen, the sampling circuit board provided in this application reduces the deformation stress caused by the high temperature of welding through structural design, enhances the protection of the safety component 5, and solves the problem that the safety component 5 is easily broken by stress caused by high temperature during welding. Furthermore, by optimizing the distribution of each component on the sampling board body 2, the overall structure of the sampling board body 2 is made uniform and stable, which is conducive to improving the quality and durability of the sampling board body 2.

[0045] The connector 4 includes a main body 41 and an external protrusion 42 that protrudes from one side of the main body 41. The width of the external protrusion 42 is smaller than the width of the main body 41.

[0046] The first groove 201 is through-hole in the thickness direction of the sampling plate body 2. This can more effectively provide deformation space for the deformation generated by the sampling plate body 2, and more effectively reduce the compressive or tensile force on the safety component 5.

[0047] The first groove 201 comprises a first groove segment, a second groove segment, and a third groove segment connected in sequence, forming an overall U-shape. The first groove segment, the second groove segment, and the third groove segment are distributed on three sides of the safety component 5 in the circumferential direction. For example, as shown in the attached figure... Figure 6 The three sides shown in diagrams a, b, and c include one side of the safety member 5 in the first direction and both sides in the second direction. Thus, the first groove 201 surrounds the safety member 5 on three sides, effectively eliminating stress deformation and reducing the stress borne by the safety member 5 while ensuring the strength of the area and preventing the safety member 5 from falling.

[0048] The connection between the first and second slot sections is arc-shaped; the connection between the second and third slot sections is also arc-shaped. The three slot sections are smoothly connected and transitioned.

[0049] Multiple safety components 5 are distributed around the terminal block 4, and the U-shaped opening of the first groove 201 faces the terminal block 4. With this arrangement, if the opening of the first groove 201 is away from the terminal block 4, the line connecting the sampling terminal 3 to the safety component 5 and then to the terminal block 4 will need to bypass the first groove 201 from the safety component 5 to connect to the terminal block 4, which is not conducive to the wiring layout.

[0050] For example, such as Figure 5 and Figure 6 As shown, the first groove segment of the first groove 201 is located on the first side of the safety member 5, i.e., side a in the figure, extending from one end of the first side of the safety member 5 toward the other end of the first side, and at least beyond the length center of the first side; the second groove segment of the first groove 201 is located on the second side of the safety member 5, i.e. side b in the figure, which is also the side of the safety member 5 away from the terminal block 4; the third groove segment of the first groove 201 is located on the third side of the safety member 5, i.e. side c in the figure, extending from one end of the third side of the safety member 5 toward the other end of the third side, and at least beyond the length center of the third side.

[0051] In some embodiments, the sampling plate body 2 is also provided with an exhaust hole 203. For example, the sampling plate body 2 includes a middle part 21, a sampling part 22, and a connecting part 23. A terminal block 4 is disposed on the middle part 21. The sampling part 22 is located on both sides of the middle part 21 in a first direction and is spaced apart from the middle part 21, and extends along a second direction. The connecting part 23 extends along the first direction and connects the sampling part 22 and the middle part 21. Thus, the exhaust hole 203 is located between the middle part 21 and the sampling part 22, and the connecting part 23, the sampling part 22, and the middle part 21 form the exhaust hole 203. The exhaust hole 203 on the sampling plate body 2 has a hollow structure, which can reduce weight, thereby reducing the overall weight of the battery pack and saving costs. Meanwhile, during the production process, after the sampling circuit board is placed above the cell assembly 1 and covered with a potting cap, the cell assembly 1 is inverted. Adhesive is then poured into the tabs and sampling circuit board to protect the tabs after the adhesive solidifies. The adhesive is poured from the sampling circuit board towards the cell assembly 1, filling the gaps between the tabs and filling the space between the sampling circuit board and the potting cap. When the circuit board has vent holes 203, during potting, the adhesive can not only flow down from the gap between the sampling board body 2 and the potting cap into the space between them, but also be poured into this space through the vent holes 203. This enhances potting efficiency. Simultaneously, the vent holes 203 improve the venting performance of the space between the sampling circuit board and the potting cap. Air in this space can be discharged from the vent holes 203 before they are completely sealed by the adhesive, enhancing the speed and smoothness of venting and preventing air pockets from forming in this space.

[0052] Both connecting portions 23 may be located at the edge of the sampling plate body 2 in the second direction, or one of the connecting portions 23 may be located in the region inside the edge. For example, a first notch 204 located at the edge of the sampling plate body 2 in the second direction may be provided between a connecting portion 23, the sampling portion 22, and the intermediate portion 21. In other words, a first notch 204 is provided at the edge of the sampling plate body 2 in the second direction, and the first notch 204 is surrounded by the connecting portion 23, the sampling portion 22, and the intermediate portion 21.

[0053] In some embodiments, the sampling board body 2 further includes an external portion 24, which extends along a first direction and is located on the side of the sampling portion 22 away from the intermediate portion 21. The two external portions 24 are respectively used to set the total positive and total negative terminals of the battery cell assembly 1, such as... Figure 3 and Figure 4 As shown. Both external portions 24 can be located at the edge of the sampling plate body 2 in the second direction, forming a second notch 205 between them and the sampling portion 22. Alternatively, the sampling plate body 2 has a second notch 205 at both ends in the first direction, and the second notch 205 is surrounded by the external portions 24 and the sampling portion 22.

[0054] The sampling board body 2 is provided with four rows of sampling terminals 3 arranged along a first direction. Specifically, there are two rows of sampling terminals 3 located on both sides of the middle part 21 in the first direction, and two rows of sampling terminals 3 located on the two sampling parts 22. Each row includes multiple sampling terminals 3 arranged along a second direction. That is, there is one row of sampling terminals 3 on each side of the middle part 21 in the first direction, and there is also one row of sampling terminals 3 on each of the two sampling parts 22. One end of the sampling terminal 3 is connected to the sampling board body 2 (referred to as the connection end 31 in this document), and the other end (referred to as the acquisition end in this document) is used to connect to the tabs of multiple battery cells 11 in the battery cell assembly 1. When the sampling circuit board is placed on the battery cell assembly 1, the sampling board body 2 is located within the projection of the battery cell assembly 1 in the height direction, and the exhaust hole 203, the first notch 204, and the second notch 205 can all expose the tabs of multiple battery cells 11. The sampling terminal 3 on the middle part 21 can be connected to the tab of the battery cell unit 11 through the vent 203 and the first notch 204, and the sampling terminal 3 on the sampling part 22 can be connected to the tab of the battery cell unit 11 through the second notch 205.

[0055] On the intermediate portion 21, each first groove 201 is provided close to the connection end 31 of the sampling terminal 3 connected to the intermediate portion 21, and at least part of the first groove 201 is located between the safety member 5 and the connection end 31 of the sampling terminal 3. For example, at least one first groove 201 is provided at the connection end 31 of each sampling terminal 3 on the intermediate portion 21.

[0056] The sampling terminal 3 is typically a metal sheet such as a nickel sheet. Its connection to the sampling board body 2 usually involves a bent portion at the end, which is inserted into and soldered to the sampling board body 2. On one hand, the connection end 31 of the sampling terminal 3 may partially protrude from the surface of the sampling board body 2. Due to this unevenness, air can easily remain near the connection end 31 of the sampling terminal 3 during the potting process, creating cavitation (small air chambers). On the other hand, high-temperature soldering generates significant stress, which may cause deformation of the sampling board body 2, potentially damaging the connection end 31 of the sampling terminal 3 due to stress compression. Therefore, arranging one or two first grooves 201 near the connection end 31 of each sampling terminal 3 not only enhances the venting at the connection end 31 of the sampling terminal 3, preventing cavitation during potting, but also eliminates at least part of the soldering stress, enhancing the protection of the sampling terminal 3 and improving the quality of the sampling circuit board.

[0057] The sampling section 22 may also be provided with a groove, and includes a plurality of second grooves 202. At least one second groove 202 is provided at the connection end 31 of the sampling terminal 3 on the sampling section 22. The second groove 202 includes three groove segments connected in sequence and is U-shaped in whole. In this way, cavitation can be prevented at the connection end 31 of the sampling terminal 3 on the sampling section 22, and the stress borne during welding can also be reduced by the second grooves 202.

[0058] The minimum distance from the first groove 201 to the corresponding sampling terminal 3 connection end 31 is 1.5-3.5 mm; for example, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, etc. Both the first groove 201 and the slot on the sampling plate body 2 for the insertion of the bent portion of the sampling terminal 3 are notches. If the first groove 201 is too close to the sampling terminal 3, it will affect the hardness of the sampling plate body 2 in this area, making it prone to breakage. Similarly, the minimum distance from the second groove 202 to the corresponding sampling terminal 3 connection end 31 is 1.5-3.5 mm.

[0059] The distance from the second groove section of the first groove 201 to the terminal block 4 is 8-12 mm. If the first groove 201 is close to the terminal block 4, it can enhance the venting near the terminal block 4, and during the potting process, it can prevent the terminal block 4 protruding from the sampling plate body 2 from generating air cavitation in the corner area; however, if the first groove 201 is too close to the terminal block 4, it will be too far from the sampling terminal 3, which will affect the stress reduction effect on the connection end 31 of the sampling terminal 3 during welding.

[0060] This application also provides a battery pack, including a cell assembly 1, a BMS control board, and a sampling circuit board as described in any of the above embodiments. The cell assembly 1 includes a plurality of arranged cell units 11. The sampling circuit board is disposed above the cell assembly 1 and connected to the tabs of the plurality of cell units 11 through sampling terminals 3. A terminal block 4 is connected to the BMS control board through wiring cables. This battery pack thus possesses the beneficial effects described in the above embodiments, which will not be elaborated further here.

[0061] The battery pack's cell assembly 1 includes two sets of cell modules arranged along a first direction. Each cell module includes multiple cell units 11 arranged along a second direction. The tabs of two adjacent cell units 11 in the second direction are connected via a connecting strip 12. For example, the positive tab of one cell unit 11 and the negative tab of another cell unit 11 are both connected to the same connecting strip 12. Thus, by sequentially connecting the tabs of each cell unit 11 via the connecting strip 12, the circuits of each cell unit 11 are connected in series. The sampling terminal 3 is connected to the connecting strip 12 to collect information such as voltage.

[0062] When the sampling plate body 2 is provided with vent holes 203, that is, the sampling plate body 2 includes a middle part 21 and vent holes 203 located on both sides of the middle part 21 in a first direction, the size, position and number of vent holes 203 can be set according to specific needs. For example, such as Figure 1 and Figure 2 As shown, there is a first gap space 101 between two adjacent cell units 11 in the second direction. The first gap space 101 is partially filled with foam 6, and exhaust channels 102 are formed on both sides of the foam 6 in the first direction. That is, the first gap space 101 is only partially filled with foam 6, and the foam 6 leaves space on both sides in the first direction to form exhaust channels 102. The projection of the exhaust hole 203 in the height direction partially overlaps with at least one exhaust channel 102. In this way, the exhaust hole 203 on the sampling plate body 2 will be directly opposite and directly connected to at least one exhaust channel 102. This structural setting will further enhance the ventilation and exhaust performance of the space between the sampling plate body 2 and the glue filling cover and the outside. During glue filling, the air in the space between the sampling plate body 2 and the glue filling cover can also be discharged from the exhaust hole 203 when the exhaust hole 203 is not completely sealed by the glue, and then discharged from the exhaust channel 102 to the environment outside the cell assembly 1, which enhances the speed and smoothness of exhaust and further ensures that the space will not form large air cavities and air chambers.

[0063] In some embodiments, the projection of the exhaust port 203 in the height direction covers at least two connecting rows 12 and a second gap space 103 located between the two connecting rows 12; the second gap space 103 is opposite to an exhaust channel 102, such as Figure 2 As shown, the second interval space 103 is located above and communicates with the first interval space 101. In the height direction, it is opposite to a portion of the foam 6 in the first interval space 101 and the exhaust channel 102 near the middle part 21 (opposite means that the projections in the height direction at least partially overlap). Thus, the size of the exhaust hole 203 in the second direction is equivalent to that of five battery cell units 11. The large size makes the sampling board body 2 a large hollow structure, which not only facilitates processing but also more effectively enhances the exhaust performance during the potting process.

[0064] Meanwhile, at least some of the two rows of sampling terminals 3 on the middle part 21 will pass through the vent 203 to the bottom of the sampling plate body 2 and connect to the tabs or connecting strip 12. The larger the size of the vent 203 and the larger the opening range, the more battery cells 11 it covers or can expose, and the more sampling terminals 3 can be connected to the connecting strip 12 through the same vent 203.

[0065] This application also provides an electrical device that includes the sampling circuit board or the battery pack described in any of the above embodiments. This electrical device then has the aforementioned beneficial effects, which will not be elaborated further here.

[0066] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0067] The components and devices described in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the accompanying drawings. As those skilled in the art will recognize, these components and devices can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the words “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0068] It should also be noted that in the apparatus and equipment of this application, the components can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.

[0069] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0070] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

[0071] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sampling circuit board, characterized in that, The sampling board includes a sampling plate body, which is equipped with a terminal block, multiple safety components, and sampling terminals for electrical connection with the electrode tabs. The terminal block is located in the middle area of ​​the sampling plate body and is used to plug in the wiring cable; the multiple safety components are arranged on both sides or the outer periphery of the terminal block; The sampling plate body is also provided with a first groove distributed on the outer periphery of each of the safety components, the first groove extending along the circumference of the safety component and at least surrounding a part of the safety component.

2. The sampling circuit board as described in claim 1, characterized in that, The first groove is through-hole in the thickness direction of the sampling plate body.

3. The sampling circuit board as described in claim 1, characterized in that, The connector includes a main body and an external protrusion extending from one side of the main body, wherein the width of the external protrusion is smaller than the width of the main body.

4. The sampling circuit board as described in claim 1, characterized in that, The first groove comprises a first groove segment, a second groove segment, and a third groove segment connected in sequence, forming an overall U-shape. The first groove segment, the second groove segment, and the third groove segment are distributed on three sides of the safety component in the circumferential direction.

5. The sampling circuit board as described in claim 4, characterized in that, The plurality of safety components are distributed around the terminal block, and the U-shaped opening of the first groove faces the terminal block.

6. The sampling circuit board as described in claim 4, characterized in that, The first groove segment of the first groove is located on the first side of the safety member, extends from one end of the first side of the safety member toward the other end of the first side, and at least exceeds the length center of the first side; And / or, the third groove segment of the first groove is located on the third side of the safety member, extends from one end of the third side of the safety member toward the other end of the third side, and at least exceeds the length center of the third side; And / or, the connection between the first slot segment and the second slot segment is arc-shaped; And / or, the connection between the second slot segment and the third slot segment is arc-shaped.

7. The sampling circuit board as described in claim 1, characterized in that, The sampling plate body includes: The middle part is provided with the terminal block, and multiple sampling terminals arranged along the second direction are provided on both sides of the middle part in the first direction. The sampling section is located on both sides of the middle section in a first direction and has a distance from the middle section, extends along a second direction and is provided with a plurality of sampling terminals arranged along the second direction; A connecting portion extends along the first direction and connects the sampling portion and the intermediate portion; An outer portion extends along the first direction and is located on the side of the sampling portion away from the middle portion; The connecting part, the sampling part, and the intermediate part together form an exhaust hole.

8. The sampling circuit board as described in claim 7, characterized in that, On the middle portion, each of the first grooves is disposed near the connection end of the sampling terminal that is connected to the middle portion, and at least part of the first groove is located between the connection end of the safety member and the sampling terminal.

9. The sampling circuit board as described in claim 7, characterized in that, It also includes multiple second grooves, with at least one second groove provided at the connection end of the sampling terminal on the sampling section; the second groove includes three groove segments connected in sequence and is U-shaped as a whole.

10. The sampling circuit board as described in claim 8, characterized in that, The shortest distance from the first groove to the sampling terminal connection end is 1.5-3.5 mm; And / or, the distance from the second groove segment of the first groove to the terminal block is 8-12 mm.

11. A battery pack, characterized in that, The device includes a battery cell assembly, a BMS control board, and a sampling circuit board as described in any one of claims 1-10. The battery cell assembly includes a plurality of battery cell units arranged in an array. The sampling circuit board is disposed above the battery cell assembly and connected to the tabs of the plurality of battery cell units through the sampling terminals. The terminal block is connected to the BMS control board through a wiring cable.

12. The battery pack as claimed in claim 11, characterized in that, The sampling plate body includes a middle part and exhaust holes located on both sides of the middle part in a first direction. There is a first gap space between two adjacent battery cells in a second direction. The first gap space is partially filled with foam and exhaust channels are formed on both sides of the foam in the first direction. The projection of the exhaust port in the height direction partially overlaps with at least one of the exhaust channels.

13. The battery pack as claimed in claim 12, characterized in that, The tabs of two adjacent battery cells in the second direction are connected by a connecting strip, and the sampling terminal is connected to the connecting strip; The projection of the exhaust port in the height direction covers at least two of the connecting rows and a second gap space located between the two connecting rows, the second gap space being opposite to one of the exhaust channels.

14. An electrical appliance, characterized in that, It includes the sampling circuit board as described in any one of claims 1-10 or the battery pack as described in any one of claims 11-13.

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