Battery Pack and Electric Vehicle

Abstract

The present invention provides a battery pack (100) and an electric vehicle (1000). The battery pack (100) includes a housing (10), a sealing cover (20), a battery string (30), a sampling structure (40), and a battery information collector (50) connected to a battery management system. The battery string (30) and the sampling structure (40) are installed in the housing (10), the battery string (30) includes a plurality of batteries (301) electrically connected to each other, and the sampling structure (40) includes a plurality of sampling lines (401), each of which has a first end (4011) connected to a corresponding battery (301) and a second end (4012) connected to the battery information collector (50). An opening (101) is provided in the housing (10), the battery information collector (50) is provided in the opening (101) of the housing (10), and the sealing cover (20) is located outside the battery information collector (50) and seals the opening (101) of the housing (10). Since the battery information collector (50) is provided in the opening (101) of the housing (10), it does not occupy the internal space of the housing (10). The sealing cover (20) not only seals the housing (10) but also the battery information collector (50), which is advantageous in reducing manufacturing costs.

Description

Technical Field

[0001] (Cross - reference to Related Applications) This disclosure claims the priority of a Chinese patent application with an application number of 202120653607.5 and an application title of "Battery Pack and Electric Vehicle", which was filed with the China National Intellectual Property Administration on March 30, 2021, and all of its contents are incorporated herein by reference.

[0002] This disclosure relates to the field of batteries, and particularly to battery packs and electric vehicles.

Background Art

[0003] In related technologies, a sampling structure collects information such as the voltage and / or temperature of a battery, transmits the collected information to a battery information collector, and after conversion processing by the battery information collector, transmits it to a battery management system.

[0004] Currently, the battery information collector is usually arranged outside the case of the battery pack. However, such an arrangement method not only causes an increase in the dimensions of the overall structure of the battery pack, but also requires the battery information collector to be individually sealed, resulting in an increase in the cost of the battery pack.

Summary of the Invention

[0005] This disclosure aims to solve at least one of the problems in the prior art. Therefore, the battery pack according to the first aspect of this disclosure includes a housing, a sealing cover, a battery string, a sampling structure, and a battery information collector connected to a battery management system. The battery string and the sampling structure are installed in the housing. The battery string includes a plurality of electrically connected batteries. The sampling structure includes a plurality of sampling wires. One end of each sampling wire is connected to the corresponding battery, and the other end is connected to the battery information collector. An opening is provided in the housing, the battery information collector is installed at the opening of the housing, the sealing cover is located outside the battery information collector, and seals the opening of the housing.

[0006] In some embodiments of the present disclosure, a partition plate for partitioning the internal space of the housing into a plurality of accommodation cavities is installed in the housing, the battery string and the sampling structure are installed in the accommodation cavity, and the first end of the sampling line in the same accommodation cavity is connected to the corresponding battery, and the second end of the sampling line in at least some of the accommodation cavities is connected to the battery information collector.

[0007] In some embodiments of the present disclosure, a connection terminal is installed at the second end of the sampling line, a plurality of pads are installed on the battery information collector, and the connection terminal and the pad are welded in a one-to-one correspondence.

[0008] In some embodiments of the present disclosure, the battery pack further includes a plurality of fuses, a connection terminal is installed at the second end of the sampling line, a plurality of pads are installed on the battery information collector, and the first end of the fuse is welded to the corresponding connection terminal, and the second end is welded to the corresponding pad.

[0009] In some embodiments of the present disclosure, the pads connected corresponding to the sampling lines in the same accommodation cavity in the battery information collector are arranged in a plurality of rows along a first direction which is the height direction of the housing, The pads connected corresponding to the sampling lines in a plurality of accommodation cavities in the battery information collector are arranged along a second direction which is the length direction or the width direction of the housing.

[0010] In some embodiments of the present disclosure, a first bending portion is installed at the second end of the sampling line, the connection terminal is installed at the first bending portion, and the battery information collector is installed on one side of the first bending portion.

[0011] In some embodiments of the present disclosure, the plurality of the accommodating cavities are arranged in sequence along a second direction, the plurality of the batteries constituting the battery string are arranged in sequence along a third direction and are connected in series, the second direction is the length direction of the housing, the third direction is the width direction of the housing, or the second direction is the width direction of the housing and the third direction is the length direction of the housing.

[0012] In some embodiments of the present disclosure, the battery pack includes a first electrode and a second electrode, the first electrode and the second electrode are arranged on both sides of the battery located oppositely along the third direction, and the first electrode of one of the two batteries connected in series and the second electrode of the other battery are connected directly or through a conductive sheet. A sampling terminal is installed at a first end of the sampling wire, and the sampling wire is connected to the first electrode of the corresponding battery through the corresponding sampling terminal, or a sampling terminal is installed at a first end of the sampling wire, and the sampling wire is connected to the second electrode of the corresponding battery through the corresponding sampling terminal. Or a sampling terminal is installed at a first end of the sampling wire, and the sampling wire is connected to the corresponding conductive sheet through the corresponding sampling terminal.

[0013] In some embodiments of the present disclosure, a second bending portion is installed at a first end of the sampling wire, the second bending portion of the sampling wire is located between two batteries connected in series, and the sampling terminal is installed at the second bending portion.

[0014] In some embodiments of the present disclosure, the opening is installed at an end of the housing along the third direction, the length of the battery information collector extends along the second direction, the width of the battery information collector extends along the first direction, the first direction is the height direction of the housing, and one of the second direction and the third direction is the length direction of the housing and the other is the width direction of the housing.

[0015] In some embodiments of the present disclosure, the sampling structure further includes a protective layer covering the plurality of sampling lines, and the protective layer and the plurality of sampling lines are configured as an FPC or an FFC.

[0016] In some embodiments of the present disclosure, the battery pack further includes a battery management system and a connection harness. The sealing cover includes a base for sealing the opening of the housing and a cover body connected to the base so as to form a sealed accommodation space. The battery management system is located within the accommodation space, and the connection harness penetrates the base to connect the battery management system and the battery information collector.

[0017] In some embodiments of the present disclosure, the battery is a pouch battery.

[0018] In another aspect, an electric vehicle according to the present disclosure includes a vehicle body and a battery pack according to any one of the above embodiments. The battery pack is fixed to the vehicle body, or the housing of the battery pack is configured as a part of the vehicle body.

[0019] The beneficial effects of the present disclosure are as follows. An opening is provided in the housing of the battery pack according to the present disclosure, and the battery information collector is installed at the opening of the housing. By doing so, the internal space of the housing is not occupied, which is advantageous for improving the space utilization rate of the battery pack. The sealing cover is installed outside the battery information collector and seals the opening of the housing. In this way, not only can the housing be sealed by the sealing cover, but also the battery information collector can be sealed, which is advantageous for reducing the number of sealing structural members and reducing the manufacturing cost of the battery pack. At the same time, the compactness of the structural design of the battery pack can also be improved, which is advantageous for reducing the overall dimensions of the battery pack. In addition, the related information of the battery can be collected by the sampling line, the sampling information can be transmitted to the battery information collector, and after being processed by the battery information collector, it can be transmitted to the battery management system, so that the operating state of the battery can be monitored and the safety of using the battery pack can be improved.

[0020] Additional aspects and advantages of the present disclosure will be shown in part in the following description, and will become apparent or be understood by the implementation of the present disclosure in part.

Brief Description of the Drawings

[0021]

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Embodiments for Carrying Out the Invention

[0022] Hereinafter, embodiments of the present disclosure will be described in detail. Examples of the embodiments to be described are shown in the drawings, and consistently, the same or similar reference numerals represent the same or similar parts, or parts having the same or similar functions. Hereinafter, the embodiments described with reference to the drawings are exemplary only and are merely for interpreting the present disclosure, and should not be understood as limiting the present disclosure.

[0023] In the description of the present disclosure, the orientation or positional relationship indicated by terms such as "center", "longitudinal direction", "lateral direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial direction", "radial direction", "circumferential direction", etc. is based on the orientation or positional relationship shown in the drawings, and is only for easily explaining the present disclosure and simplifying the description, and does not indicate or imply that the shown device or part must have a specific orientation and be configured and operate in a specific orientation, so it should not be understood as limiting the present disclosure.

[0024] As shown in FIGS. 1 to 7, the present disclosure provides a battery pack 100 including a housing 10, a sealing cover 20, a battery string 30, a sampling structure 40, and a battery information collector 50 connected to a battery management system. The battery string 30 and the sampling structure 40 are installed in the housing 10. The battery string 30 includes a plurality of electrically connected batteries 301, and the sampling structure 40 includes a plurality of sampling wires 401. One end 4011 of the sampling wire 401 is connected to the corresponding battery 301, and the other end 4012 is connected to the battery information collector 50. An opening 101 is installed in the housing 10, the battery information collector 50 is installed at the opening 101 of the housing 10, the sealing cover 20 is located outside the battery information collector 50, and seals the opening 101 of the housing 10.

[0025] The outside of the battery information collector 50 refers to the side away from the internal space of the housing 10 of the battery information collector 50. One end of the sampling wire 401 is connected to the corresponding battery 301, and the other end 4012 is connected to the battery information collector 50. By doing so, the sampling wire 401 can collect the relevant information of the battery 301, transmit the information to the battery information collector 50, and after being subjected to conversion processing by the battery information collector 50, transmit it to the battery management system, so that the operating state of the battery 301 can be monitored and the safety of using the battery pack 100 can be improved.

[0026] An opening 101 is installed in the housing 10 of the battery pack 100 according to the present disclosure, and the battery information collector 50 is installed at the opening 101 of the housing 10. By doing so, the internal space of the housing 10 is not occupied, which is beneficial to improving the space utilization rate of the battery pack 100. The sealing cover 20 is installed outside the battery information collector 50 and seals the opening 101 of the housing 10. In this way, not only can the housing 10 be sealed by the sealing cover 20, but also the battery information collector 50 can be sealed, which is beneficial to reducing the number of sealing structure members and reducing the manufacturing cost of the battery pack 100. At the same time, the compactness of the structural design of the battery pack 100 can also be improved, which is beneficial to reducing the overall dimensions of the battery pack 100.

[0027] In some embodiments, as shown in FIGS. 3 to 6, inside the housing 10, a partition plate 60 that partitions the internal space of the housing 10 into a plurality of accommodation cavities 70 is installed. A battery string 30 and a sampling structure 40 are installed in the accommodation cavity 70. The first end portion 4011 of the sampling wire 401 in the same accommodation cavity 70 is connected to the corresponding battery 301, and the second end portion 4012 of the sampling wire 401 in at least some of the accommodation cavities 70 is connected to the battery information collector 50. In this way, since the information collected by the sampling wires 401 in the plurality of accommodation cavities 70 can be converted and processed by one battery information collector 50, the number of battery information collectors 50 in the battery pack 100 can be reduced, which is advantageous for reducing the cost of the battery pack 100. As shown in FIG. 3, the sampling wires 401 in the five accommodation cavities 70 are connected to one battery information collector 50. Of course, in other embodiments, the sampling wires 401 in all the accommodation cavities 70 may be connected to one battery information collector 50.

[0028] In some embodiments, as shown in FIGS. 10 and 11, a connection terminal 402 is installed at the second end portion 4012 of the sampling wire 401, and a plurality of pads 501 are installed on the battery information collector 50. The connection terminal 402 and the pads 501 are welded in a one-to-one correspondence. By using the welding means, the reliability of the connection between the sampling wire 401 and the battery information collector 50 can be guaranteed. Also, such means are simple and advantageous for reducing costs. Of course, in other embodiments, the sampling wire 401 may be connected to the battery information collector 50 by insertion means.

[0029] In some other embodiments, as shown in FIG. 9, the battery pack 100 further includes a plurality of fuses 90. A connection terminal 402 is installed at the second end 4012 of the sampling line 401, and a plurality of pads 501 are installed on the battery information collector 50. One end of the fuse 90 is welded to the corresponding connection terminal 402, and the other end is welded to the corresponding pad 501. The fuse 90 can not only realize the connection between the sampling line 401 and the battery information collector 50, but also perform an overcurrent protection function. By doing so, the number of structural members can be reduced, which is beneficial for reducing the cost of the battery pack 100 and ensuring the safety of the entire sampling circuit.

[0030] As shown in FIG. 9, the battery information collector 50 is installed on one side of the sampling structure 40, and a plurality of pads 501 are installed on the side of the battery information collector 50 facing the sampling structure 40. A plurality of through holes 407 are installed in the sampling structure 40. The connection terminal 402 is installed on the side of the sampling structure 40 away from the battery information collector 50, and the fuse 90 passes through the through hole 407 and is welded to the pad 501.

[0031] In some embodiments, as shown in FIGS. 3, 4, and 9, the pads 501 connected corresponding to the sampling lines 401 within the same accommodation cavity 70 in the battery information collector 50 are arranged in a plurality of rows along the first direction which is the height direction of the housing 10. The pads 501 connected corresponding to the sampling lines 401 within the plurality of accommodation cavities 70 in the battery information collector 50 are arranged along the second direction which is the length direction or the width direction of the housing 10. Installing in this way can make the arrangement of the pads 501 in the battery information collector 50 more compact, which is beneficial for reducing the size and cost of the battery information collector 50.

[0032] The first direction is the Z direction in FIG. 3, and the width direction of the battery information collector 50 can coincide with the first direction. The second direction is the X direction in FIG. 3, and the length direction of the battery information collector 50 can coincide with the second direction.

[0033] When the battery pack 100 is attached to the vehicle body 200 of the electric vehicle 1000, the height direction of the housing 10 may coincide with the height direction of the electric vehicle 1000, the length direction of the housing 10 may coincide with the length direction of the electric vehicle 1000, and the width direction of the housing 10 may coincide with the length direction of the electric vehicle 1000. Alternatively, the length direction of the housing 10 may coincide with the width direction of the electric vehicle 1000, and the width direction of the housing 10 may coincide with the length direction of the electric vehicle 1000.

[0034] In some embodiments, as shown in FIGS. 3, 4, and 5, a plurality of accommodation cavities 70 are arranged in sequence along a second direction, a plurality of batteries 301 constituting the battery string 30 are arranged in sequence along a third direction and are connected in series, the second direction is the length direction of the housing 10, the third direction is the width direction of the housing 10, or the second direction is the width direction of the housing 10, and the third direction is the length direction of the housing 10. The second direction is the X direction in FIG. 3, and the third direction is the Y direction in FIG. 3.

[0035] As shown in FIGS. 5 and 7, the battery 301 includes a first electrode 302 and a second electrode 303. The first electrode 302 and the second electrode 303 are arranged on both sides located on the opposite sides of the battery 301 along the third direction and are connected in series. The first electrode 302 of one of the two batteries 301 connected in series and the second electrode 303 of the other battery 301 are connected directly or via a conductive sheet.

[0036] In some embodiments, a sampling terminal 403 is installed at the first end 4011 of the sampling line 401, and the sampling line 401 is connected to the first electrode 302 of the corresponding battery 301 via the corresponding sampling terminal 403.

[0037] In some other embodiments, the difference from the above embodiments is that the sampling line 401 is connected to the second electrode 303 of the corresponding battery 301 via the corresponding sampling terminal 403.

[0038] In some other embodiments, the difference from the above embodiments is that the sampling line 401 is connected to the corresponding conductive sheet through the corresponding sampling terminal 403.

[0039] In some embodiments, as shown in FIGS. 3 and 5, the sampling structures 40 in the plurality of accommodating cavities 70 are arranged along the second direction, and the sampling structures 40 in the same accommodating cavity 70 are installed on one side along the first direction of the battery string 30. The first direction is the height direction of the housing 10, and the second direction is the length direction or the width direction of the housing 10.

[0040] In some embodiments, as shown in FIGS. 6 to 9, a first bending portion 404 is installed at the second end portion 4012 of the sampling line 401, the connection terminal 402 is installed on the first bending portion 404, and the battery information collector 50 is installed on one side of the first bending portion 404. By using such a design of the bending structure on the sampling line 401, it is advantageous for welding with the battery information collector 50.

[0041] In some embodiments, as shown in FIGS. 6 and 7, a second bending portion 405 is installed at the first end portion 4011 of the sampling line 401. The second bending portion 405 of the sampling line 401 is located between two batteries 301 connected in series, and the sampling terminal 403 is installed on the second bending portion 405. By using such a structural design, the connection between the sampling line 401 and the first electrode 302, the second electrode 303 or the conductive sheet is facilitated.

[0042] In some embodiments, as shown in FIG. 9, a plurality of avoidance openings are installed in the protective layer 406, and the portion of the sampling line 401 exposed at the corresponding avoidance opening constitutes the connection terminal 402.

[0043] In some other embodiments, as shown in FIG. 11, the sampling structure 40 further includes a protective layer 406 covering a plurality of sampling lines 401, and a first portion of the sampling line 401 extends from the protective layer 406 to form a connection terminal 402. The sampling line 401 is a metal conductor.

[0044] In some embodiments, as shown in FIGS. 6 and 7, the sampling structure 40 further includes a protective layer 406 covering a plurality of sampling lines 401, and a second portion of the sampling line 401 extends from the protective layer 406 to form a sampling terminal 403.

[0045] In some other embodiments, the second portion of the sampling line 401 is exposed from the protective layer 406 and welded to the sampling terminal 403.

[0046] The sampling line 401 is a metal conductor, and the connection terminal 402 is a metal sheet. Also, the sampling line 401 may be formed by etching or die-cutting a metal foil.

[0047] In some embodiments, the sampling structure 40 further includes a protective layer 406 covering a plurality of sampling lines 401, and the protective layer 406 and the plurality of sampling lines 401 are configured as an FPC (Flexible Printed Circuit) or an FFC (Flexible Flat Cable).

[0048] The FPC includes a metal foil and a protective film covering both sides of the metal foil. A plurality of sampling lines 401 are formed by etching the metal foil, and the protective layer 406 is formed by the protective film.

[0049] The FFC includes a plurality of metal conductors and an insulating film covering both sides of the metal conductors. The metal conductors are adhered between two insulating films to form the sampling lines 401, and the insulating film forms the protective layer 406.

[0050] In some embodiments, one sampling structure 40 and a plurality of electrically connected battery strings 30 are installed in the accommodation cavity 70, and the sampling lines 401 in the same accommodation cavity 70 are connected corresponding to the batteries 301 that constitute the plurality of battery strings 30. In this way, since the batteries 301 in the accommodation cavity 70 can be sampled by the sampling lines 401 in the same accommodation cavity 70, it is advantageous to simplify the arrangement of the sampling lines 401 in each accommodation cavity 70.

[0051] In some embodiments, the plurality of battery strings 30 in the same accommodation cavity 70 are arranged in order along the second direction and are connected in series.

[0052] It should be noted that the connection of two batteries 301 connecting two battery strings 30 in series is similar to the connection method of two batteries 301 connected in series in the battery string 30, and the connection method between the sampling line 401 and two batteries 301 connecting two battery strings 30 in series is similar to the connection method of the sampling line 401 and two batteries 301 connected in series in the battery string 30, so the description is omitted here. For example, two battery strings 30 are installed in the same accommodation cavity 70, and the two battery strings 30 in the same accommodation cavity 70 are arranged in order along the first direction and are connected in series.

[0053] Of course, the plurality of battery strings 30 in the same accommodation cavity 70 may be arranged in order along the second direction and connected in parallel.

[0054] In some embodiments, as shown in FIGS. 2 to 4, an opening 101 is installed at an end of the housing 10 along the third direction. The length of the battery information collector 50 extends along the second direction, and the width of the battery information collector 50 extends along the first direction. The first direction is the height direction of the housing 10, and one of the second direction and the third direction is the length direction of the housing 10, and the other is the width direction of the housing 10.

[0055] In some embodiments, as shown in FIG. 2, the battery pack 100 further includes a battery management system and a connection harness. The sealing cover 20 includes a base 201 that seals the opening 101 of the housing 10 and a cover body 202 connected to the base 201 to form a sealed accommodation space. The battery management system is located within the accommodation space, and the connection harness passes through the base 201 to connect the battery management system and the battery information collector 50. In this way, not only can the housing 10 be sealed by the sealing cover 20, but also the battery management system can be sealed. Therefore, the number of sealing structure members can be reduced, which is advantageous for reducing costs.

[0056] In some embodiments, as shown in FIGS. 2 to 4, the battery pack 100 further includes an insulating bracket 80 installed at the opening 101 of the housing 10, and the battery information collector 50 is fixed to the outside of the insulating bracket 80. The outside of the insulating bracket 80 refers to the side away from the internal space of the housing 10 of the insulating bracket 80.

[0057] In some embodiments, the battery 301 is a pouch battery. Of course, in other embodiments, the battery 301 may be a cylindrical battery. Alternatively, the case of the battery 301 may be a metal case.

[0058] In another aspect, as shown in FIG. 12, the present disclosure further provides an electric vehicle 1000 including a vehicle body 200 and the battery pack 100. The battery pack 100 is fixed to the vehicle body 200, or the housing 10 of the battery pack 100 is configured as a part of the vehicle body 200. An opening 101 is provided in the housing 10 of the battery pack 100 in the electric vehicle 1000 according to the present disclosure, and the battery information collector 50 is installed at the opening 101 of the housing 10. By doing so, the internal space of the housing 10 is not occupied, which is advantageous for improving the space utilization rate of the battery pack 100. The sealing cover 20 is installed outside the battery information collector 50 to seal the opening 101 of the housing 10. In this way, not only can the housing 10 be sealed by the sealing cover 20, but also the battery information collector 50 can be sealed, which is advantageous for reducing the number of sealing structural members and reducing the manufacturing cost of the battery pack 100. At the same time, the compactness of the structural design of the battery pack 100 can also be improved, which is advantageous for reducing the overall dimensions of the battery pack 100. In addition, the related information of the battery 301 can be collected by the sampling line 401, transmitted to the battery information collector 50, and then transmitted to the battery management system after being processed by the battery information collector 50, so that the operating state of the battery 301 can be monitored and the safety of the use of the battery pack 100 can be improved.

[0059] In the description of the present disclosure, unless otherwise clearly defined and limited, the terms "attachment", "connection", and "connection" should be understood in a broad sense. For example, they may be fixed connection, detachable connection, or integral connection, mechanical connection, or electrical connection, direct connection, or indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present disclosure according to the specific situation.

[0060] In the description of this specification, the references to terms such as "embodiment", "specific embodiment", "example", etc. mean that the specific features, structures, materials, or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the exemplary expressions of the above terms are not necessarily limited to the same embodiment or example. Also, the specific features, structures, materials, or characteristics described can be appropriately combined in any one or more embodiments or examples.

[0061] Although the embodiments of the present disclosure have been shown and described, those skilled in the art can make various changes, corrections, substitutions, and modifications to these embodiments without departing from the principles and purposes of the present disclosure, and it can be understood that the scope of the present disclosure is limited by the claims and their equivalents.

Description of Reference Numerals

[0062] 1000 Electric vehicle 100 Battery pack 200 Vehicle body 10 Housing 101 Opening 20 Sealing cover 201 Base 202 Cover body 30 Battery string 301 Battery 302 First electrode 303 Second electrode 40 Sampling structure 401 Sampling wire 402 Connection terminal 403 Sampling terminal 404 First bending part 405 Second bending part 406 Protective layer 407 Through hole 4011 First end 4012 Second end 50 Battery information collector 501 Pad 60 Partition board 70 Accommodation cavity 80 Insulating bracket 90 Fuse

Claims

1. A battery pack (100) including a housing (10), a sealing cover (20), a battery string (30), a sampling structure (40), and a battery information collector (50) connected to a battery management system, The battery string (30) and the sampling structure (40) are installed in the housing (10), the battery string (30) includes a plurality of electrically connected batteries (301), the sampling structure (40) includes a plurality of sampling wires (401), a first end (4011) of the sampling wire (401) is connected to the corresponding battery (301), and a second end (4012) of the sampling wire (401) is connected to the battery information collector (50), An opening (101) is installed in the housing (10), the battery information collector (50) is installed at the opening (101) of the housing (10), the sealing cover (20) is located outside the battery information collector (50), and seals the opening (101) of the housing (10), characterized in that the battery pack (100).

2. A partition plate (60) for partitioning the internal space of the housing (10) into a plurality of accommodation cavities (70) is installed in the housing (10), The battery string (30) and the sampling structure (40) are installed in the accommodation cavity (70), The first end (4011) of the sampling wire (401) in the same accommodation cavity (70) is connected to the corresponding battery (301), The battery pack (100) according to claim 1, characterized in that the second ends (4012) of at least some of the sampling wires (401) in the accommodation cavity (70) are connected to the battery information collector (50).

3. A connection terminal (402) is installed at the second end (4012) of the sampling wire (401), and a plurality of pads (501) are installed on the battery information collector (50), The battery pack (100) according to claim 2, characterized in that the connection terminals (402) and the pads (501) are welded in a one-to-one correspondence.

4. Further comprising a plurality of fuses (90), A connection terminal (402) is installed at the second end (4012) of the sampling line (401), and a plurality of pads (501) are installed on the battery information collector (50), The fuse (90) is characterized in that the first end is welded to the corresponding connection terminal (402), and the second end is welded to the corresponding pad (501). The battery pack (100) according to claim 2.

5. The pads (501) connected corresponding to the sampling lines (401) within the same accommodation cavity (70) in the battery information collector (50) are arranged in a plurality of rows along the first direction which is the height direction of the housing (10), The pads (501) connected corresponding to the sampling lines (401) within a plurality of accommodation cavities (70) in the battery information collector (50) are arranged along the second direction which is the length direction or the width direction of the housing (10). The battery pack (100) according to claim 3 or 4.

6. A first bending portion (404) is installed at the second end (4012) of the sampling line (401), the connection terminal (402) is installed on the first bending portion (404), and the battery information collector (50) is installed on one side of the first bending portion (404). The battery pack (100) according to claim 3 or 4.

7. The plurality of accommodation cavities (70) are arranged in sequence along the second direction, The plurality of batteries (301) constituting the battery string (30) are arranged in sequence along the third direction and are connected in series, The second direction is the length direction of the housing (10), and the third direction is the width direction of the housing (10), Alternatively, the second direction is the width direction of the housing (10), and the third direction is the length direction of the housing (10). The battery pack (100) according to claim 2 is characterized by this.

8. The battery (301) includes a first electrode (302) and a second electrode (303). The first electrode (302) and the second electrode (303) are arranged on both sides of the battery (301) located opposite to each other along the third direction. The first electrode (302) of one battery (301) and the second electrode (303) of the other battery (301) among two batteries (301) connected in series are connected directly or via a conductive sheet. A sampling terminal (403) is installed at the first end (4011) of the sampling line (401). The sampling line (401) is connected to the first electrode (302) of the corresponding battery (301) via the corresponding sampling terminal (403). Alternatively, a sampling terminal (403) is installed at the first end (4011) of the sampling line (401). The sampling line (401) is connected to the second electrode (303) of the corresponding battery (301) via the corresponding sampling terminal (403). Alternatively, a sampling terminal (403) is installed at the first end (4011) of the sampling line (401). The sampling line (401) is connected to the corresponding conductive sheet via the corresponding sampling terminal (403). The battery pack (100) according to claim 7 is characterized by this.

9. A second bending portion (405) is installed at the first end (4011) of the sampling line (401). The second bending portion (405) of the sampling line (401) is located between two batteries connected in series. The sampling terminal (403) is installed at the second bending portion (405). The battery pack (100) according to claim 8 is characterized by this.

10. The opening (101) is installed at an end of the housing (10) along the third direction, the length of the battery information collector (50) extends along the second direction, the width of the battery information collector (50) extends along the first direction, the first direction is the height direction of the housing (10), and one of the second direction and the third direction is the length direction of the housing (10), and the other is the width direction of the housing (10). The battery pack (100) according to any one of claims 1 to 9, characterized in that.

11. The sampling structure (40) further includes a protective layer (406) covering the plurality of sampling lines (401). The protective layer (406) and the plurality of sampling lines (401) are configured as an FPC or an FFC. The battery pack (100) according to any one of claims 1 to 9, characterized in that.

12. It further includes a battery management system and a connection harness. The sealing cover (20) includes a base (201) that seals the opening (101) of the housing (10), and a cover body (202) connected to the base (201) so as to form a sealed accommodation space. The battery management system is located within the accommodation space. The connection harness passes through the base (201) to connect the battery management system and the battery information collector (50). The battery pack (100) according to any one of claims 1 to 9, characterized in that.

13. The battery is a pouch battery. The battery pack (100) according to any one of claims 1 to 9, characterized in that.

14. It includes a vehicle body (200) and a battery pack (100) according to any one of claims 1 to 13. The battery pack (100) is fixed to the vehicle body, or the housing (10) of the battery pack (100) is configured as a part of the vehicle body. The electric vehicle (1000), characterized in that.

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