Sampling device, battery module, battery module group and battery pack

Abstract

The utility model belongs to the technical field of battery sampling, and discloses a sampling device, a battery module, a battery module and a battery pack, the sampling device is used for carrying out voltage sampling on the battery module, the battery module comprises at least two battery units, each battery unit comprises at least one battery cell, the sampling device comprises a busbar and a sampling assembly, the busbar is arranged between two adjacent battery units, and the busbar is electrically connected with the battery core of each battery unit; the sampling assembly comprises a sampling copper bar and an insulating part, the sampling copper bar is electrically connected with the busbar, and the insulating part is used for insulating the sampling copper bar. Therefore, the sampling copper bar is electrically connected with the busbar, so that the voltage transmitted to the busbar from the battery cell can be led out, the internal space of the battery module is prevented from being occupied, voltage sampling is carried out on all the battery modules, the production cost is reduced, meanwhile, a worker can carry out assembly conveniently, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery sampling, in particular to a sampling device, a battery module, a battery module group and a battery pack. Background Art

[0002] In order to ensure the safe and efficient operation of the battery, it is necessary to sample the battery to obtain various data of the battery, so as to realize the monitoring and control of the battery state by the battery management system. With the popularization of electric vehicles, the performance requirements for the battery are also getting higher and higher.

[0003] The battery voltage is a key parameter for evaluating the charging state of the battery. By sampling the battery voltage, not only can the remaining power of the battery be known, but also the health status of the battery can be tracked and detected by analyzing the voltage data, preventing overcharging or over-discharging of the battery, improving the safety performance of the battery and extending the service life of the battery. The sampling device includes an FPC (Flexible Printed Circuit Board) board and a sampling structure arranged inside the battery module. The FPC board is connected to the sampling structure, and each battery module is correspondingly connected to an FPC board, so that the voltage signal in the battery module is transmitted to the FPC board through the sampling structure, and then the voltage data is transmitted to the battery management system through the FPC board.

[0004] When the battery includes multiple battery modules, a sampling structure and an FPC board need to be connected to each battery module, and a large amount of FPC materials and sampling connector terminals are required, resulting in a high processing cost. Due to the large number of FPC boards and samplings, not only the internal space utilization rate of the battery module is low, but also the FPC board is prone to damage, breakage and various situations that cause unstable sampling data or complete loss of the data during the manufacturing process, and the battery module needs to be reworked or scrapped, resulting in a low manufacturing yield rate, affecting the sampling effect and assembly efficiency. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a sampling device, a battery module, a battery module group and a battery pack to solve the problems of poor sampling effect and low assembly efficiency of the battery sampling device.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] In a first aspect, a sampling device is used for voltage sampling of a battery module. The battery module includes at least two battery cells, and each battery cell includes at least one battery core. The sampling device includes: a bus bar disposed between two adjacent battery cells, and the bus bar is electrically connected to the battery cores of each battery cell; a sampling component, which includes a sampling copper bar and an insulating member. The sampling copper bar is electrically connected to the bus bar, and the insulating member is used for insulating the sampling copper bar.

[0008] Preferably, the sampling component further includes a connecting member. One end of the connecting member is electrically connected to the bus bar, and the other end is electrically connected to the sampling copper bar.

[0009] Preferably, the sampling copper bar is provided with a second connection hole, and the connecting member is inserted into the second connection hole.

[0010] Preferably, the insulating member is disposed between the sampling copper bar and the bus bar. The insulating member includes a supporting portion, and the supporting portion is provided with a receiving groove for receiving the sampling copper bar.

[0011] Preferably, the insulating member includes a guiding portion, and the guiding portion is disposed towards the bus bar.

[0012] Preferably, on a side of the bus bar facing the sampling copper bar, a first connection hole is provided. The sampling copper bar passes through the first connection hole and is electrically connected to the bus bar. Alternatively, the sampling component further includes a connecting member. One end of the connecting member is electrically connected to the bus bar, and the other end is electrically connected to the sampling copper bar. The connecting member passes through the first connection hole and is electrically connected to the bus bar.

[0013] Preferably, the connecting member is a blind rivet, and the blind rivet passes through the sampling copper bar and is electrically connected to the bus bar.

[0014] In a second aspect, a battery module includes a housing, at least two battery cells, and the sampling device as described above. Each battery cell includes at least one battery core. The bus bar and the battery cells are both disposed inside the housing, and the insulating member is disposed on the housing.

[0015] In a third aspect, a battery module group includes an insulating side plate, an end plate, and at least one battery module as described above. The battery cells in the battery module are electrically connected, and the battery module is disposed in a receiving space formed by the insulating side plate and the end plate.

[0016] In a fourth aspect, a battery pack includes a battery box body and the battery module or battery module group as described above disposed inside the battery box body.

[0017] Advantages of the present utility model:

[0018] A sampling device is used for voltage sampling of a battery module. The battery module includes at least two battery cells, and each battery cell contains at least one battery core. The sampling device includes a bus bar and a sampling assembly, which is arranged between two adjacent battery cells. The bus bar is electrically connected to the battery cores of each battery cell. The sampling assembly includes a sampling copper bar and an insulating member. The sampling copper bar is electrically connected to the bus bar, and the insulating member is used to insulate the sampling copper bar. By electrically connecting the sampling copper bar to the bus bar, the voltage inside the battery module can be led out, so as to realize sampling outside the battery module, avoid occupying the internal space of the battery module. All the sampling copper bars are electrically connected to the bus bar, which can sample all the battery modules, facilitating the assembly by workers, improving the assembly efficiency, saving the materials of the FPC board and terminals, reducing the production cost, reducing the risk of FPC board fracture, and improving the sampling effect.

[0019] The present utility model also provides a battery module, a battery module group and a battery pack. By respectively arranging the above sampling device, the voltage of the battery core can be led out through the sampling copper bar, facilitating the acquisition of voltage signals, improving the sampling and assembly efficiency, saving the materials of the FPC board and terminals, reducing the production cost, and avoiding the risk of FPC board fracture. Description of the Drawings

[0020] Figure 1 is an exploded sectional view of the sampling device in an embodiment of the present utility model;

[0021] Figure 2 is a top view of the battery module in an embodiment of the present utility model;

[0022] Figure 3 is in an embodiment of the present utility model Figure 2 A - A sectional view;

[0023] Figure 4 is in an embodiment of the present utility model Figure 3 Enlarged view at B;

[0024] Figure 5 is a structural schematic diagram of the battery module in an embodiment of the present utility model;

[0025] Figure 6 is a partial structural schematic diagram of the battery module for showing the battery core in an embodiment of the present utility model;

[0026] Figure 7 is a partial structural schematic diagram of the battery module for showing the bus bar in an embodiment of the present utility model;

[0027] Figure 8It is a schematic structural diagram of a battery module in an embodiment of the present utility model;

[0028] Figure 9 It is an exploded view of a battery module in an embodiment of the present utility model, aiming to show the heat insulation pad and the heat conduction film.

[0029] In the figure:

[0030] 1. Bus bar; 11. First connection hole; 2. Sampling component; 21. Sampling copper bar; 211. Second connection hole; 22. Connector; 23. Insulating part; 231. Support part; 2311. Accommodating groove; 232. Guiding part; 2321. Guiding hole; 3. First FPC board; 4. Second FPC board; 5. Battery module; 51. Battery cell; 511. Tab; 52. Tab output pole; 53. Outer shell; 531. Third connection hole; 6. Heat insulation pad; 7. Heat conduction film. Detailed implementation manners

[0031] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0032] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0033] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicating that the horizontal height of the first feature is lower than that of the second feature.

[0034] In the description of this embodiment, the terms "upper", "lower", "right", etc., which represent orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings. They are only for convenience of description and simplifying operations, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] Embodiment 1

[0036] Referring to Figures 1 to 3 , the present utility model provides a sampling device for voltage sampling of a battery module. The battery module 5 includes at least two battery cells, and each battery cell contains at least one battery core 51. The sampling device includes a bus bar 1 and a sampling component 2. The bus bar 1 is arranged between two adjacent battery cells for transmitting the voltage signal of the battery cell; the sampling component 2 includes a sampling copper bar 21 and an insulating member 23. The sampling copper bar 21 is electrically connected to the bus bar 1, and the insulating member 23 is used to insulate the sampling copper bar 21.

[0037] In this embodiment, the bus bar 1 and the sampling copper bar 21 are both arranged in one-to-one correspondence with the battery module 5. That is, one bus bar 1 and one sampling copper bar 21 are arranged on one battery module 5. The bus bar 1 is arranged inside the battery module 5. The sampling copper bar 21 is in a rectangular plate-like structure and is arranged in the middle of the top surface of the battery module 5. It can be understood that there can be one or multiple battery modules 5. In this embodiment, there are multiple battery modules 5, and the multiple battery modules 5 are arranged along their thickness direction. The sampling copper bar 21 can also collect other signals of the battery core 51, not limited to voltage signals.

[0038] It should be noted that the voltage signal generated by the battery core 51 can be transmitted to the sampling copper bar 21 through the bus bar 1 and then transmitted to the battery management system through the sampling copper bar 21 to realize voltage sampling of multiple battery modules 5.

[0039] In this way, the sampling copper bar 21 is electrically connected to the bus bar 1, which can realize leading out the voltage of the bus bar 1, so that the sampling component 2 can be arranged outside the battery module 5, avoiding occupying the internal space of the battery module 5, saving production costs, improving assembly efficiency, avoiding the risk of damage or breakage of the FPC board due to too many assembled FPC boards, and improving the sampling effect.

[0040] Referring to Figure 1 and Figure 2 , in some embodiments, the sampling component 2 further includes a connecting member 22. One end of the connecting member 22 is electrically connected to the bus bar 1, and the other end is electrically connected to the sampling copper bar 21 for transmitting the voltage signal of the bus bar 1 to the sampling copper bar 21.

[0041] In this embodiment, the connector 22 is made of a conductive material, which may be a metal material such as a copper alloy material, an aluminum alloy material, etc., and two ends of the connector 22 are respectively in contact with the bus 1 and the sampling copper bus 21 .

[0042] In this way, the voltage signal transmitted from the battery cell 51 to the bus 1 can be transmitted to the sampling copper bus 21 through the connector 22 made of conductive material, and then transmitted to the external circuit and battery management system through the sampling copper bus 21, so as to externalize the voltage of the battery cell 51 and sample the voltage of the battery module 5, and keep the sampling copper bus 21 and the bus 1 at the same potential. At the same time, the connector 22 can install the sampling copper bus 21 on the battery module 5, limit the relative position of the sampling copper bus 21 and the battery module 5, prevent the sampling copper bus 21 from falling off the battery module 5 and affecting the voltage sampling, thereby improving the sampling effect.

[0043] See also Figure 1 In some embodiments, the sampling copper bus 21 is provided with a second connection hole 211 , and the connection member 22 is inserted into the second connection hole 211 .

[0044] In this way, the connector 22 passes through the second connecting hole 211 and is connected to the sampling copper bus 21, which can not only limit the relative position of the sampling copper bus 21 and the connector 22, but also ensure that the sampling copper bus 21 and the bus 1 are stably electrically connected through the connector 22, so as to realize the externalization of the voltage of the battery module 5 and improve the internal space utilization of the battery module 5.

[0045] It is understandable that the sampling copper bus 21 may also extend in a direction close to the bus 1 and be directly welded to the bus 1 , and is not limited to being connected through the connector 22 , as long as the sampling copper bus 21 is electrically connected to the bus 1 .

[0046] See also Figure 1 In some embodiments, the insulating member 23 is disposed between the sampling copper bus 21 and the bus 1, and the connecting member 22 passes through the sampling copper bus 21 and the insulating member 23 in sequence and is connected to the bus 1 to limit the relative position of the sampling copper bus 21 and the insulating member 23. The insulating member 23 includes a supporting portion 231, and the supporting portion 231 is provided with a receiving groove 2311 for receiving the sampling copper bus 21.

[0047] In this embodiment, the insulating member 23 is made of insulating material, and the sampling copper bus 21 is connected to the insulating member 23 through the connecting member 22, that is, the sampling copper bus 21 is not in direct contact with the bus 1, and the insulating member 23 is detachably connected to the battery module 5. The supporting portion 231 is a horizontal plate-like structure, and the accommodating groove 2311 is opened on the side of the supporting portion 231 away from the battery module 5, and the cross-sectional area of ​​the accommodating groove 2311 is larger than the cross-sectional area of ​​the sampling copper bus 21.

[0048] In this way, the insulating member 23 made of insulating material can enable the voltage signal of the bus bar 1 to be transmitted to the sampling copper bar 21 only through the connecting member 22, improving the voltage sampling effect. At the same time, since the insulating member 23 can stably support the sampling copper bar 21; placing the insulating member 23 at the position of the battery module 5 corresponding to the bus bar 1 and placing the sampling copper bar 21 in the accommodating groove 2311 can facilitate the positioning and installation of the sampling copper bar 21 and limit the position of the sampling copper bar 21, improving the assembly efficiency and preventing it from shaking or shifting during the assembly process, thus enhancing the sampling effect.

[0049] It can be understood that the material of the insulating member 23 can be flexibly adjusted according to actual needs. In this embodiment, the insulating member 23 is made of plastic material to make the insulating member 23 lighter in weight, facilitating processing and assembly; the thickness of the accommodating groove 2311 can be greater than or less than the thickness of the sampling copper bar 21, or can be equal to the thickness of the sampling copper bar 21. In this embodiment, the thickness of the accommodating groove 2311 is less than the thickness of the sampling copper bar 21 to facilitate the assembly of the connecting member 22. The thickness of the accommodating groove 2311 can be flexibly adjusted according to actual needs and will not be overly limited here.

[0050] Refer to Figure 1 , in some embodiments, the insulating member 23 includes a guiding portion 232. The guiding portion 232 faces the bus bar 1 and is used for guiding the connecting member 22 to move towards the bus bar 1 and for assembling the insulating member 23 on the battery module 5. Further, the guiding portion 232 is provided with a guiding hole 2321, and the connecting member 22 passes through the guiding hole 2321 and is connected to the sampling copper bar 21.

[0051] Among them, the guiding portion 232 and the supporting portion 231 are integrally formed. When the connecting member 22 passes through the guiding hole 2321 and is connected to the sampling copper bar 21, the connecting member 22 is coaxial with the guiding hole 2321; the length of the connecting member 22 is greater than the length of the guiding portion 232. When the supporting portion 231 is assembled on the battery module 5, the guiding portion 232 extends into the interior of the battery module 5.

[0052] In this way, the guiding portion 232 can guide the moving direction of the connecting member 22, facilitating the quick electrical connection of the connecting member 22 to the bus bar 1, improving the assembly efficiency, and the guiding portion 232 can protect the part of the connecting member 22 located in the guiding hole 2321, avoiding situations such as short circuits, thus improving the sampling efficiency and the safety performance of the sampling device.

[0053] Refer to Figure 1 , in some embodiments, a first connection hole 11 is provided on the side of the bus bar 1 facing the sampling copper bar 21. The sampling copper bar 21 passes through the first connection hole 11 and is connected to the bus bar 1, or one end of the connecting member 22 is electrically connected to the bus bar 1, the other end is electrically connected to the sampling copper bar 21, and the connecting member 22 passes through the first connection hole 11 and is electrically connected to the bus bar 1.

[0054] In this embodiment, the connecting member 22 passes through the first connecting hole 11 and is connected to the bus bar 1. The diameter of the first connecting hole 11 is adapted to the diameter of the connecting member 22. When the connecting member 22 is assembled to the bus bar 1, the end of the connecting member 22 facing away from the sampling copper bar 21 is located inside the bus bar 1.

[0055] In this way, the connecting member 22 passes through the first connecting hole 11 and is connected to the bus bar 1, which can fix the relative position of the connecting member 22 and the bus bar 1, and further limit the relative positions of the sampling copper bar 21, the insulating member 23, and the bus bar 1. While the sampling copper bar 21 and the bus bar 1 are connected by the connecting member 22, the voltage signal can be stably transmitted through the connecting member 22 to the sampling copper bar 21, improving the sampling effect.

[0056] It can be understood that the sampling copper bar 21 can also extend into the battery module 5 and be directly electrically connected to the bus bar 1. The specific connection method can be flexibly adjusted according to actual needs, as long as the sampling copper bar 21 can sample the voltage signal output by the battery cell 51, which will not be elaborated here.

[0057] Refer to Figure 1 , in some embodiments, the connecting member 22 is a blind rivet. The blind rivet passes through the sampling copper bar 21 and is electrically connected to the bus bar 1, which is used to limit the relative position of the sampling copper bar 21 and the bus bar 1 and transmit the voltage signal of the bus bar 1 to the sampling copper bar 21. Among them, the diameter of the guiding hole 2321 is larger than the diameter of the first connecting hole 11.

[0058] It should be noted that the guiding part 232 of the insulating member 23 is inserted into the battery module 5, so that the guiding part 232 is located inside the battery module 5. At this time, the supporting part 231 abuts against the battery module 5. The sampling copper bar 21 is placed in the accommodating groove 2311. The blind rivet passes through the second connecting hole 211, the guiding part 232, and the first connecting hole 11 in sequence to connect and limit the relative positions of the sampling copper bar 21, the insulating member 23, and the bus bar 1, realizing the assembly of the sampling device.

[0059] In this way, the blind rivet can quickly connect the sampling copper bar 21, the insulating member 23, and the bus bar 1, improving the assembly efficiency, and enabling the sampling copper bar 21 and the bus bar 1 to be electrically connected, leading out the voltage of the bus bar 1, reducing the occupation of the internal space of the battery module 5, improving the sampling effect outside the battery module 5, and at the same time being able to reduce the use of consumables while realizing voltage sampling, saving production costs.

[0060] It can be understood that the connecting member 22 can also be a bolt, and the first connecting hole 11 is a threaded hole corresponding to the bolt. In this embodiment, a blind rivet is used to achieve the quick connection of the sampling copper bar 21 and the bus bar 1. The specific structure of the connecting member 22 can be adjusted according to actual needs, and will not be listed in detail here.

[0061] Referring to Figures 3 to 6 , the present utility model further provides a battery module, which includes a housing 53, at least two battery cells and a sampling device. Each battery cell includes at least one battery core 51. The bus bar 1 and the battery cells are both arranged inside the housing 53, and the insulating member 23 is arranged on the housing 53.

[0062] Furthermore, referring to Figure 1 , the bus bar is provided with a first connection hole 11, the housing 53 is provided with a third connection hole 531 corresponding to the position of the first connection hole 11, and the connecting member 22 passes through the third connection hole 531 and the first connection hole 11 and is electrically connected to the bus bar 1.

[0063] In this embodiment, referring to Figure 7 , the battery core 51 is a soft-pack battery core, the housing 53 is a cuboid structure. Four battery cores 51 are arranged inside one housing 53, and the four battery cores 51 are arranged in two parallel rows and two series. The tabs of the battery cores 51 with the same electrical property are located on the same side. The bus bar 1 is an inverted U-shaped structure, and the bus bar 1 is electrically connected to all four battery cores 51.

[0064] In this way, the connecting member 22 passes through the third connection hole 531 and the first connection hole 11 in sequence to connect the bus bar 1 and the sampling copper bar 21, which can leave enough distance between the housing 53 and the bus bar 1, so that the electrical clearance meets the requirements, and the sampling effect and safety are improved.

[0065] It can be understood that one battery core 51 can also be arranged in the battery cell, and the bus bar 1 is electrically connected to the battery core 51; two battery cores 51 can also be arranged in the battery cell, and the two battery cores 51 are arranged along the length direction or the width direction of the battery core 51. The bus bar 1 is electrically connected to both battery cores 51. The number of battery cores 51 can be flexibly adjusted according to actual needs, and this embodiment does not limit this.

[0066] Referring to Figures 1 to 3 , the present utility model further provides a battery module group, which includes insulating side plates (not shown in the figure), end plates (not shown in the figure) and at least one battery module 5. The battery cells in the battery module are electrically connected, and the battery module 5 is arranged in the accommodation space formed by the insulating side plates and the end plates.

[0067] Referring to Figure 3 , in some embodiments, the battery module 5 is connected to a first FPC board 3. There are two or more battery modules 5. The first FPC board 3 is electrically connected to the sampling copper bars 21 on all battery modules 5 for transmitting the voltage signals of all battery modules 5. The length direction of the first FPC board 3 is parallel to the arrangement direction of the battery modules 5. The first FPC board 3 is arranged on the side of the sampling copper bar 21 away from the battery module 5. Nickel sheets (not shown in the figure) are arranged on the first FPC board 3, and the nickel sheets are connected to the sampling copper bars 21 by welding.

[0068] Among them, multiple battery modules 5 are arranged in a direction perpendicular to the length direction of the battery module 5. Multiple sampling copper bars 21 are correspondingly arranged at the middle position of the top surface of the housing 53. The length direction of the first FPC board 3 is parallel to the arrangement direction of the battery modules 5. The cross-sectional area of the accommodation groove 2311 is larger than the cross-sectional area of the sampling copper bar 21, so as to facilitate the welding of the first FPC board 3 and the sampling copper bar 21.

[0069] In this way, after the voltage inside each battery module 5 is led out through the sampling copper bar 21, it is transmitted to the battery management system via the first FPC board 3, enabling voltage sampling of the battery and transmitting the sampled signal to the battery management system for processing. Transmitting the voltage signals of the entire battery through one first FPC board 3 can not only save the use of materials for the FPC board and the use of terminal blocks arranged on the FPC board, saving production costs and the overall occupied space of the battery, but also enable the first FPC board 3 to be stably electrically connected to the bus bar 1 through the sampling copper bar 21, improving the assembly efficiency.

[0070] Furthermore, a heat conduction film 7 is also arranged between every two adjacent battery modules 5, and a heat insulation pad 6 is arranged between each group of battery modules 5. The number of battery modules 5 in each group can be adjusted according to actual needs and will not be listed in detail here.

[0071] Refer to Figure 3 , in some embodiments, the battery module 5 further includes an ear output pole 52. One ear output pole 52 is arranged at each end of each battery module 5. The sampling device further includes a second FPC board 4. There are two second FPC boards 4, and the two second FPC boards 4 are respectively arranged at both ends of the battery module 5 and electrically connected to all the ear output poles 52 on the same side. In this embodiment, the length direction of the second FPC board 4 is parallel to the arrangement direction of the battery modules 5.

[0072] In this way, the second FPC connected to the ear output pole 52 can transmit other signals (such as current signals, temperature signals, etc.) output by the ear output pole 52, realizing sampling of the battery and transmitting the sampled signal to the battery management system.

[0073] Refer to Figure 8 and Figure 9 , the present utility model further provides a battery pack, including a battery box body and a battery module or a battery module group arranged in the battery box body.

[0074] Embodiment 2

[0075] The difference from the first embodiment is that multiple battery modules 5 are provided, and one support portion 231 is provided. A plurality of receiving grooves 2311 are formed in one support portion 231. A plurality of busbars 1 are respectively connected to a plurality of guiding portions 232 in one-to-one correspondence, so that one support portion 231 is connected to all the battery modules 5. The length direction of the support portion 231 is parallel to the length direction of the first FPC board 3.

[0076] In this way, after arranging the multiple battery modules 5 neatly, inserting the multiple guiding portions 232 into the third connection holes 531 respectively can quickly limit the position of the support portion 231 on the multiple battery modules 5, facilitating the sequential assembly of the sampling copper bars 21 into the receiving grooves 2311 and improving the assembly efficiency.

[0077] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A sampling device, characterized in that, For voltage sampling of a battery module (5), the battery module (5) includes at least two battery cells, and each of the battery cells includes at least one battery core (51). The sampling device includes: A bus bar (1) disposed between two adjacent battery cells, and the bus bar (1) is electrically connected to the battery cores (51) of each battery cell; A sampling assembly (2), the sampling assembly (2) includes a sampling copper bar (21) and an insulating member (23), the sampling copper bar (21) is electrically connected to the bus bar (1), and the insulating member (23) is used to insulate the sampling copper bar (21).

2. The sampling device according to claim 1, characterized in that, The sampling assembly (2) further includes a connecting member (22), one end of the connecting member (22) is electrically connected to the bus bar (1), and the other end is electrically connected to the sampling copper bar (21).

3. The sampling device according to claim 2, wherein The sampling copper bar (21) is provided with a second connection hole (211), and the connecting member (22) is inserted into the second connection hole (211).

4. The sampling device according to claim 1, characterized in that, The insulating member (23) is disposed between the sampling copper bar (21) and the bus bar (1), and the insulating member (23) includes a support portion (231), and the support portion (231) is provided with a receiving groove (2311) for receiving the sampling copper bar (21).

5. The sampling device according to claim 1, wherein The insulating member (23) includes a guiding portion (232), and the guiding portion (232) is disposed toward the bus bar (1).

6. The sampling device according to claim 1, characterized in that On one side of the bus bar (1) facing the sampling copper bar (21), a first connection hole (11) is provided, the sampling copper bar (21) passes through the first connection hole (11) and is electrically connected to the bus bar (1), or the sampling assembly (2) further includes a connecting member (22), one end of the connecting member (22) is electrically connected to the bus bar (1), and the other end is electrically connected to the sampling copper bar (21), and the connecting member (22) passes through the first connection hole (11) and is electrically connected to the bus bar (1).

7. The sampling device according to claim 2, characterized in that The connecting member (22) is a blind rivet, and the blind rivet passes through the sampling copper bar (21) and is electrically connected to the bus bar (1).

8. A battery module, characterized in that, It includes a housing (53), at least two battery cells, and the sampling device according to any one of claims 1-7. Each of the battery cells includes at least one battery core (51). The bus bar (1) and the battery cells are both disposed inside the housing (53), and the insulating member (23) is disposed on the housing (53).

9. A battery module, characterized in that, It includes an insulating side plate, an end plate, and at least one battery module (5) according to claim 8. The battery cells in the battery module (5) are electrically connected, and the battery module (5) is disposed in a receiving space formed by the insulating side plate and the end plate.

10. A battery pack, characterized in that, It includes a battery box body and the battery module (5) according to claim 8 or the battery module according to claim 9 disposed inside the battery box body.

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