Battery pack

Abstract

The embodiment of the utility model provides a battery pack. The battery pack comprises a box body and a battery cell module, the box body defines a containing cavity, the battery cell module is installed in the containing cavity, and the box body is provided with an opening channel communicated with the containing cavity; the distribution box is arranged on one side, deviating from the accommodating cavity, of the box body; the connecting piece is arranged on one side, facing the box body, of the distribution box, penetrates through the opening channel and is connected with the battery cell module and the distribution box; and the sealing piece is arranged between the box body and the distribution box, and the sealing piece is arranged around the opening channel and the connecting piece. Therefore, the connecting piece can be simultaneously sealed through the sealing piece, and the connecting part between the box body and the distribution box can also be sealed through the sealing piece, so that the sealing requirement of the battery pack is met, the overall volume of the battery pack is reduced, and the preparation cost of the battery pack is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a battery pack. Background Technology

[0002] When the distribution box is installed outside the battery pack, it is necessary to satisfy both the electrical connection between the distribution box and the battery pack, and the sealing between them. Currently, this is usually achieved by sealing the battery pack and distribution box separately with enclosures, and then connecting their high-voltage and low-voltage components using connectors or electrical connectors (wiring harnesses, copper busbars). However, this method increases the manufacturing cost of the battery pack and also increases its overall size. Utility Model Content

[0003] To address or partially address the aforementioned problems, this utility model discloses a battery pack that solves the issues of increased manufacturing costs and larger size of battery packs caused by externally located distribution boxes in the prior art.

[0004] To address the aforementioned problems, this utility model provides a battery pack having a first direction, a second direction, and a third direction that intersect each other in pairs.

[0005] include:

[0006] The enclosure includes a housing and a battery cell module. The housing includes a receiving cavity, the battery cell module defines the receiving cavity, and the side wall of the housing has an opening channel communicating with the receiving cavity.

[0007] The distribution box is located on the side of the box body opposite to the receiving cavity;

[0008] A connector is provided on the side of the distribution box facing the box body, and the connector passes through the opening channel and connects the battery cell module and the distribution box;

[0009] A sealing element is disposed between the enclosure and the distribution box, and the sealing element is disposed around the opening channel and the connector.

[0010] Optionally, the number of the connectors and the number of the opening channels are both multiple and the same;

[0011] One of the connectors passes through one of the opening channels and is connected to the cell module.

[0012] Optionally, the number of connectors is multiple, the number of opening channels is at least one, and the number of connectors is greater than the number of opening channels;

[0013] Multiple connectors simultaneously pass through one of the opening channels and connect to the cell module.

[0014] Optionally, the distribution box includes a power distribution module and an outer casing, the outer casing having a power distribution cavity, and the power distribution module being installed in the power distribution cavity;

[0015] The outer shell has a mounting groove on its surface facing the box.

[0016] The connector is at least partially installed in the mounting slot.

[0017] Optionally, the area of ​​the mounting groove projected orthographically along the second direction onto the plane formed by the first direction and the third direction is S1 square millimeters, and the area of ​​the opening channel projected orthographically along the second direction onto the plane formed by the first direction and the third direction is S2 square millimeters, wherein 0.8 ≤ S1 / S2 ≤ 1.2.

[0018] Optionally, the connector is bent to form a first part and a second part, the first part extending along the second direction toward the housing, and the second part covering the bottom of the mounting groove.

[0019] Optionally, the seal includes a sealing ring and a locking element;

[0020] The locking element is disposed on at least one side of the sealing ring, the sealing ring surrounds the opening channel, the enclosure and the distribution box are connected by the locking element, and the sealing ring abuts against the enclosure and the distribution box.

[0021] Optionally, a limiting groove is also provided on the side of the enclosure near the distribution box, and the opening channel penetrates the bottom of the limiting groove;

[0022] The sealing element is embedded in the limiting groove.

[0023] Optionally, the seal includes a sealing ring;

[0024] The sealing ring has a dimension of W1 mm ​​in the first direction, and the opening channel has a dimension of W2 mm in the first direction, wherein 1 ≤ W1 / W2 ≤ 3.

[0025] Optionally, the sealing ring has a dimension of L1 mm in the third direction, and the opening channel has a dimension of L2 mm in the third direction;

[0026] Where 1≤L1 / L2≤3.

[0027] Optionally, the distribution box includes a power distribution module and a housing;

[0028] The connector passes through the housing and is electrically connected to the power distribution module.

[0029] Optionally, the distribution box includes a power distribution module and a housing;

[0030] The outer casing has a connecting channel on one side facing the box, and the connector passes through the connecting channel and is electrically connected to the power distribution module.

[0031] Optionally, the sealing element includes a sealing ring and a locking element, and the sealing element is sandwiched between the housing and the distribution box;

[0032] The locking element connects the housing and the distribution box and is arranged circumferentially around the outer side of the sealing ring.

[0033] In this embodiment of the invention, the housing defines a receiving cavity, in which the battery cell module is installed. The housing has an opening channel communicating with the receiving cavity. A connector is located on the side of the distribution box facing the housing. The connector passes through the opening channel and connects the battery cell module and the distribution box. Therefore, the connector can directly pass through the housing and the battery cell module for electrical connection. Furthermore, since the sealing element is located between the housing and the distribution box, and surrounds the opening channel and the connector, it can simultaneously seal the connector and the connection between the housing and the distribution box, thus meeting the sealing requirements of the battery pack. In summary, in this embodiment of the invention, directly achieving a seal between the housing and the distribution box through a sealed connection not only ensures a good sealing effect but also reduces the overall volume of the battery pack and helps reduce the manufacturing cost. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is an assembly diagram of a battery pack provided in an embodiment of the present utility model;

[0036] Figure 2 This is one of the exploded structural diagrams of a battery pack provided in this embodiment of the present invention;

[0037] Figure 3 This is the second exploded structural diagram of a battery pack provided in this embodiment of the present invention;

[0038] Figure 4This is a schematic diagram of the frame structure of a battery pack provided in an embodiment of the present utility model;

[0039] Figure 5 This utility model provides a frame in Figure 4 A magnified view of a portion of point N;

[0040] Figure 6 This is an exploded structural diagram of the housing and distribution box of a battery pack provided in an embodiment of the present utility model;

[0041] Figure 7 This is an exploded structural diagram of the housing and distribution box included in another battery pack provided in this embodiment of the present utility model;

[0042] Figure 8 This is a schematic diagram of the structure of a distribution box included in another battery pack provided in this embodiment of the present invention;

[0043] Figure 9 Another embodiment of the present invention provides a battery pack including a distribution box in... Figure 8 A magnified view of a portion of point F;

[0044] Figure 10 This is a schematic diagram of the structure of the housing and sealing ring of another battery pack provided in this embodiment of the present invention;

[0045] Figure 11 Another battery pack provided in this embodiment of the utility model includes a housing and a sealing ring. Figure 10 A magnified view of a portion of point M.

[0046] Explanation of reference numerals in the attached figures:

[0047] 1: Enclosure; 2: Distribution box; 3: Connector; 4: Seal; 11: Frame; 12: Battery cell module; 21: Distribution module; 22: Outer shell; 221: Mounting slot; 222: Connecting channel; 41: Sealing ring; 42: Locking element; 111: Opening channel; 221: Mounting slot; 1111: Limiting slot. Detailed Implementation

[0048] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0049] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering. For example, "parallel" refers to the angle between two lines, a line and a surface, or a surface, where the angle is between -1° and 1°. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. For example, "perpendicular" refers to the angle between two lines, a line and a surface, or a surface, where the angle is between 89° and 91°. Equal distances or equal angles include not only absolute equality but also approximate equality as commonly understood in engineering, meaning there may be a certain degree of error, such as a tolerance range of -1% to 1%.

[0050] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0051] like Figures 1 to 9 As shown, a battery pack has a first direction Z, a second direction X, and a third direction Y that intersect each other in pairs. In some embodiments, the first direction Z, the second direction X, and the third direction Y are preferably perpendicular to each other in pairs.

[0052] include:

[0053] The enclosure 1 and the battery cell module 12 are provided. The enclosure 1 defines a receiving cavity, and the battery cell module 12 is installed in the receiving cavity. The enclosure 1 has an opening channel 111 that communicates with the receiving cavity.

[0054] Distribution box 2 is located on the side of box 1 away from the receiving cavity.

[0055] Connector 3 is located on the side of the distribution box 2 facing the box 1. Connector 3 passes through the opening channel 111 and connects the battery cell module 12 and the distribution box 2.

[0056] The sealing element 4 is disposed between the enclosure 1 and the distribution box 2, and is disposed around the opening channel 111 and the connector 3.

[0057] As can be seen from the above embodiments, in this embodiment of the present invention, since the housing 1 defines a receiving cavity, the battery cell module 12 is installed in the receiving cavity. The housing 1 has an opening channel 111 communicating with the receiving cavity. The connector 3 is located on the side of the distribution box 2 facing the housing 1. The connector 3 passes through the opening channel 111 and connects the battery cell module 12 and the distribution box 2. Therefore, the connector 3 can directly pass through the housing 1 and the battery cell module 12 for electrical connection. Furthermore, since the sealing element 4 is located between the housing 1 and the distribution box 2, and is arranged around the opening channel 111 and the connector 3, the sealing element 4 can simultaneously seal the connector 3 and the connection between the housing 1 and the distribution box 2, thereby meeting the sealing requirements of the battery pack. In summary, in this embodiment of the present invention, the sealing between the housing 1 and the distribution box 2 is directly achieved through a sealed connection, which not only ensures the sealing effect but also reduces the overall volume of the battery pack and helps to reduce the manufacturing cost of the battery pack.

[0058] In the above embodiments, the housing 1 is a shell structure for accommodating battery cells. The housing 1 can be a square shell structure, a cylindrical shell structure, or a shell structure of other shapes; the utility model embodiments do not limit this. The housing 1 may include a frame 11 and a cover plate. The frame 11 forms a receiving cavity for accommodating the battery cell module 12. The cover plate covers the openings at both ends of the frame 11 to ensure the airtightness of the housing 1. An opening channel 111 can be provided on the side wall of the frame 11, allowing the opening channel 111 to communicate with the receiving cavity. Furthermore, the material of the housing 1 can be any one of aluminum alloy, steel, polypropylene, polycarbonate, etc.

[0059] The cell module 12 can be a single cell or include multiple stacked battery cells. For example, when the cell module 12 includes multiple stacked battery cells, the battery pack adopts a stacking process, which can make full use of the space inside the housing 1, increase the energy density, improve the structural stability and safety performance of the battery, and increase the cycle life of the battery.

[0060] Distribution box 2 is a type of battery disconnect unit (BDU). Distribution box 2 can cut off the current inside the battery pack, ensuring the safety of the battery pack. Distribution box 2 needs to establish an electrical connection with cell module 12. In this embodiment, the connector 3 connected to distribution box 2 needs to pass through the housing 1 and connect to cell module 12. Since housing 1 needs to be airtight, sealing treatment is required when connector 3 passes through housing 1.

[0061] Based on this, in this embodiment of the invention, a sealing element 4 is provided between the housing 1 and the distribution box 2, and the sealing element 4 surrounds the opening channel 111 opened on the housing 1. It should be noted that the opening channel 111 opened on the housing 1 is a through-hole structure connecting the interior and exterior of the housing 1. There can be one or more opening channels 111, and the opening channel 111 can be a square through-hole structure or a circular through-hole structure. The connector 3 is a conductive structure, such as a metal strip structure, a semiconductor rod structure, or other shaped conductive material; this embodiment of the invention does not limit this.

[0062] The sealing element 4 surrounding the opening channel 111 can be a ring structure, or a frame structure formed by multiple strip structures, or other structures that can be arranged around the opening channel 111. The sealing element 4 can be made of materials such as butyl, acrylate, polysulfide, nitrile, silicone rubber, polyurethane, polyvinyl chloride, and epoxy resin. This utility model embodiment does not limit this.

[0063] It should be noted that, according to Figure 2 In this embodiment of the present invention, the X-axis direction intersects with the Z-axis direction, the X-axis direction intersects with the Y-axis direction, and the Y-axis direction intersects with the Z-axis direction. For ease of explanation, the first direction is defined as the Z-axis direction, the second direction is defined as the X-axis direction (that is, the extension direction of the connector 3 in this embodiment of the present invention), and the third direction is defined as the Y-axis direction.

[0064] In one possible implementation, such as Figure 7 As shown, the number of connectors 3 and the number of opening channels 111 are both multiple and the same; one connector 3 passes through one opening channel 111 and is connected to the cell module 12.

[0065] In this embodiment, one connector 3 corresponds to one opening channel 111, and the connector 3 and the opening channel 111 are in one-to-one correspondence, that is, each connector 3 is connected to an independent opening channel 111. In this way, one connector 3 passes through one opening channel 111 and connects to the cell module 12, thereby making the shape of the opening channel 111 consistent with the shape of the connector 3. That is, each opening channel 111 can limit the connector 3, ensuring the electrical connection between the distribution box 2 and the cell module 12 while reducing the gap between the connector 3 and the opening channel 111. This facilitates sealing of the connector 3 and the opening channel 111 and reduces the mutual electromagnetic coupling between the cell module 12 and the distribution box 2. In this embodiment, the number of seals 4 can also be multiple, that is, the number of seals 4 is the same as the number of connectors 3. Each seal 4 is provided with an opening channel 111 for heat exchange, and a connector 3 passes through a seal 4, so that each opening channel 111 is sealed by a seal 4, further improving the sealing effect between the box 1 and the distribution box 2.

[0066] In another possible implementation, such as Figure 2 and Figure 6 As shown, there are multiple connectors 3 and at least one opening channel 111. The number of connectors 3 is greater than the number of opening channels 111. Multiple connectors 3 pass through one opening channel 111 and are connected to the cell module 12 simultaneously. More preferably, all connectors 3 pass through one opening channel 111 and are connected to the cell module 12 simultaneously.

[0067] In this embodiment, multiple connectors 3 correspond to one opening channel 111, meaning that multiple connectors 3 pass through the same opening channel 111. For example, the number of connectors 3 can be four, and the number of opening channels 111 can be one, or the number of connectors 3 can be four, and the number of opening channels 111 can be two. This allows multiple connectors 3 to pass through one opening channel 111 simultaneously, thereby simplifying the structure of the housing 1 and reducing its manufacturing cost. It should be noted that in this embodiment, the number of seals 4 is the same as the number of opening channels 111, with one seal 4 surrounding one opening channel 111. This reduces the number of seals 4 required, thus facilitating the assembly between the seals 4 and the housing 1.

[0068] Regarding the structure of distribution box 2, as follows: Figure 3 , Figure 8 and Figure 9As shown, in some embodiments, the distribution box 2 includes a power distribution module 21 and a housing 22. The housing 22 has a power distribution cavity, and the power distribution module 21 is installed in the power distribution cavity. The housing 22 has a mounting groove 221 on its surface facing the box 1. The connector 3 is at least partially installed in the mounting groove 221.

[0069] It should be noted that, in this embodiment, the power distribution module 21 may include electronic components such as relays and fuses, and the power distribution cavity of the housing 22 may define an assembly space, in which electronic components such as relays and fuses may be installed. A mounting groove 221 is provided on the surface of the housing 22 facing the box 1, and at least a portion of the connector 3 may be installed in the mounting groove 221 by means of welding, bonding or bolting.

[0070] In some embodiments, the connector 3 can be bent into a first part and a second part. The first part extends along the second direction X toward the housing 1, and the second part is attached to the bottom of the mounting groove 221. In this way, the mounting area between the connector 3 and the housing 22 can be increased, and the connection strength between the connector 3 and the housing 22 can be improved.

[0071] Furthermore, the area of ​​the mounting groove 221 projected along the second direction X onto the plane formed by the first direction Z and the third direction Y is S1 square centimeters, and the area of ​​the opening channel 111 projected along the second direction X onto the plane formed by the first direction Z and the third direction Y is S2 square centimeters, where 0.8≤S1 / S2≤1.2.

[0072] In this embodiment, since the area of ​​the mounting groove 221 projected along the second direction X onto the plane formed by the first direction Z and the third direction Y is S1 square centimeters, and the area of ​​the opening channel 111 projected along the second direction X onto the plane formed by the first direction Z and the third direction Y is S2 square centimeters, where 0.8 ≤ S1 / S2 ≤ 1.2, interference with the connector 3 due to a small S1 can be avoided, while the strength of the housing 1 can be avoided due to a large S1. The projected area of ​​the opening channel 111 along the second direction X onto the plane formed by the first direction Z and the third direction Y can be the area of ​​the shape enclosed by the inner wall of the opening channel 111. Table 1 shows the relationship between the area change between S1 and S2 and the interference situation, and the relationship between the area change between S1 and S2 and the strength attenuation rate of the housing 1, when the area of ​​the cross-section of the plane formed by the connector 3 on the plane formed by the first direction Z and the third direction Y remains unchanged.

[0073] Table 1

[0074]

[0075] As can be seen from Table 1, when 0.8≤S1 / S2≤1.2, it is possible to avoid interference with the connector 3 due to a small S1, while also avoiding the impact on the strength of the box 1 due to a large S1.

[0076] Regarding the structure of seal 4, in some embodiments, such as Figure 3 As shown, the sealing element 4 includes a sealing ring 41 and a locking element 42. The sealing ring 41 is sandwiched between the enclosure 1 and the distribution box 2, and the locking element 42 connects the enclosure 1 and the distribution box 2. The locking element 42 is provided on at least one side of the sealing ring 41. The sealing ring 41 is arranged around the opening channel 111. The enclosure 1 and the distribution box 2 are connected by the locking element 42, and the sealing ring 41 abuts against the enclosure 1 and the distribution box 2.

[0077] It should be noted that in this embodiment, the locking member 42 can be one or more of the following connecting members 3: snap-fit, bolt, or rivet. Thus, with the sealing ring 41 surrounding the opening channel 111, and the enclosure 1 and distribution box 2 connected by the locking member 42, and the sealing member 4 abutting between the enclosure 1 and distribution box 2, the locking member 42 can simultaneously lock the enclosure 1 and distribution box 2, reducing the gap between them. This compression of the sealing ring 41 ensures that there are no gaps between the sealing ring 41 and the enclosure 1, and between the sealing ring 41 and the distribution box, further improving the sealing performance.

[0078] In some embodiments, such as Figure 4 and Figure 5 As shown, the sealing element 4 includes a sealing ring 41. A limiting groove 1111 is also provided on the side of the housing 1 near the distribution box 2. The opening channel 111 passes through the bottom of the limiting groove 1111, and the sealing element 4 is embedded in the limiting groove 1111.

[0079] In this embodiment, since a limiting groove 1111 is also provided on the side of the box 1 near the distribution box 2, and the opening channel 111 penetrates the bottom of the limiting groove 1111, and the sealing element 4 is embedded in the limiting groove 1111, the limiting groove 1111 can provide space for the sealing ring 41 to be installed on the one hand, and the limiting groove 1111 can make the sealing ring 41 fit tightly against the hole wall of the opening channel 111, thereby further improving the sealing effect of the sealing element 4.

[0080] In some embodiments, such as Figure 10 and Figure 11 As shown, the seal 4 includes a sealing ring 41; the sealing ring 41 has a dimension of W1 mm ​​in the first direction Z, and the opening channel 111 has a dimension of W2 mm in the first direction Z, wherein 1 ≤ W1 / W2 ≤ 3. This ensures the sealing effect of the sealing ring 41 in the first direction Z.

[0081] In some embodiments, the sealing ring 41 has a dimension of L1 mm in the third direction Y, and the opening channel 111 has a dimension of L2 mm in the third direction Y, wherein 1 ≤ L1 / L2 ≤ 3. This ensures the sealing effect of the sealing ring 41 in the third direction Y.

[0082] It should be noted that by limiting the above two dimensions, while ensuring that the sealing ring 41 and the opening channel 111 are compatible (that is, ensuring that the area of ​​the orthographic projection of the sealing member 4 in the third direction Y and the first direction Z is greater than the area of ​​the orthographic projection of the opening channel 111 in the third direction Y and the first direction Z), the sealing effect of the sealing ring 41 is not reduced when the area of ​​the orthographic projection of the sealing member 4 in the third direction Y and the first direction Z is large.

[0083] In some embodiments, the distribution box 2 includes a power distribution module 21 and a housing 22; a connector 3 passes through the housing 22 and is electrically connected to the power distribution module 21. This ensures that the electrical signals sent by the power distribution module 21 are transmitted through the connector 3.

[0084] In some embodiments, such as Figure 8 and Figure 9 As shown, the outer casing 22 has a connecting channel 222 on the side facing the housing 1. The connector 3 passes through the connecting channel 222 and is electrically connected to the power distribution module 21. In this way, the connector 3 can be guided out through the connecting channel 222, which facilitates the electrical connection between the connector 3 and the battery cell module 12.

[0085] In some embodiments, the locking member 42 is arranged circumferentially around the outer side of the sealing ring 41. In this way, the force exerted by the locking member 42 on the housing 1 and the distribution box 2 is distributed around the sealing ring 41, thereby making the deformation of the sealing ring 41 more even and further ensuring the sealing performance of the sealing ring 41.

[0086] As can be seen from the above embodiments, in this embodiment of the present invention, since the housing 1 defines a receiving cavity, the battery cell module 12 is installed in the receiving cavity. The side wall of the housing 1 has an opening channel 111 communicating with the receiving cavity. The connector 3 is located on the side of the distribution box 2 facing the housing 1. The connector 3 passes through the opening channel 111 and connects the battery cell module 12 and the distribution box 2. Therefore, the connector 3 can directly pass through the housing 1 and electrically connect the battery cell module 12. Furthermore, since the sealing element 4 is located between the housing 1 and the distribution box 2, and is arranged around the opening channel 111 and the connector 3, the sealing element 4 can simultaneously seal the connector 3 and also seal the connection between the housing 1 and the distribution box 2, thereby meeting the sealing requirements of the battery pack. In summary, in this embodiment of the present invention, directly achieving a sealed connection between the housing 1 and the distribution box 2 not only ensures a sealing effect but also reduces the overall volume of the battery pack and helps reduce the manufacturing cost of the battery pack.

[0087] The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0088] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0089] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0090] The present invention has been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A battery pack having a first direction (Z), a second direction (X), and a third direction (Y) that intersect each other in pairs; Its features are, The battery pack includes: The enclosure (1) and the battery cell module (12) are provided. The enclosure (1) defines a receiving cavity, and the battery cell module (12) is installed in the receiving cavity. The enclosure (1) has an opening channel (111) communicating with the receiving cavity. The distribution box (2) is located on the side of the box body (1) away from the receiving cavity; A connector (3) is provided on the side of the distribution box (2) facing the box body (1). The connector (3) passes through the opening channel (111) and connects the battery cell module (12) and the distribution box (2). A sealing element (4) is disposed between the housing (1) and the distribution box (2), and the sealing element (4) is disposed around the opening channel (111) and the connector (3).

2. The battery pack according to claim 1, characterized in that, The number of the connectors (3) and the number of the opening channels (111) are both multiple and the same; One of the connectors (3) passes through one of the opening channels (111) and is connected to the cell module (12).

3. The battery pack according to claim 1, characterized in that, The number of connectors (3) is multiple, the number of opening channels (111) is at least one, and the number of connectors (3) is greater than the number of opening channels (111); Multiple connectors (3) are connected to the battery cell module (12) by passing through one of the opening channels (111) simultaneously.

4. The battery pack according to claim 1, characterized in that, The distribution box (2) includes a power distribution module (21) and an outer shell (22). The outer shell (22) has a power distribution cavity, and the power distribution module (21) is installed in the power distribution cavity. The outer shell (22) has a mounting groove (221) on its surface facing the box (1); The connector (3) is at least partially installed in the mounting slot (221).

5. The battery pack according to claim 4, characterized in that, The area of ​​the mounting groove (221) projected along the second direction (X) onto the plane formed by the first direction (Z) and the third direction (Y) is S1 square millimeters, and the area of ​​the opening channel (111) projected along the second direction (X) onto the plane formed by the first direction (Z) and the third direction (Y) is S2 square millimeters, wherein 0.8 ≤ S1 / S2 ≤ 1.

2.

6. The battery pack according to claim 4, characterized in that, The connector (3) is bent to form a first part and a second part. The first part extends along the second direction (X) toward the direction close to the housing (1), and the second part is attached to the bottom of the mounting groove (221).

7. The battery pack according to claim 1, characterized in that, The sealing element (4) includes a sealing ring (41) and a locking element (42); The locking member (42) is disposed on at least one side of the sealing ring (41), the sealing ring (41) is disposed around the opening channel (111), the enclosure (1) and the distribution box (2) are connected by the locking member (42), and the sealing ring (41) abuts against the enclosure (1) and the distribution box (2).

8. The battery pack according to claim 1, characterized in that, The box (1) is also provided with a limiting groove (1111) on the side near the distribution box (2), and the opening channel (111) penetrates the bottom of the limiting groove (1111); The sealing element (4) is fitted into the limiting groove (1111).

9. The battery pack according to claim 1, characterized in that, The sealing element (4) includes a sealing ring (41); The sealing ring (41) has a dimension of W1 mm ​​in the first direction (Z), and the opening channel (111) has a dimension of W2 mm in the first direction (Z), wherein 1 ≤ W1 / W2 ≤ 3.

10. The battery pack according to claim 1, characterized in that, The sealing ring (41) has a dimension of L1 mm in the third direction (Y), and the opening channel (111) has a dimension of L2 mm in the third direction (Y), wherein 1 ≤ L1 / L2 ≤ 3.

11. The battery pack according to claim 1, characterized in that, The distribution box (2) includes a power distribution module (21) and an outer casing (22), wherein the power distribution module (21) is disposed inside the outer casing (22); The connector (3) passes through the outer casing (22) and is electrically connected to the power distribution module (21).

12. The battery pack according to claim 1, characterized in that, The distribution box (2) includes a power distribution module (21) and an outer casing (22); The outer casing (22) has a connecting channel (222) on the side facing the box (1), and the connector (3) passes through the connecting channel (222) and is electrically connected to the power distribution module (21).

13. The battery pack according to claim 1, characterized in that, The sealing element (4) includes a sealing ring (41) and a locking element (42). The sealing ring (41) is sandwiched between the housing (1) and the distribution box (2). The locking element (42) connects the housing (1) and the distribution box (2) and is arranged circumferentially around the outer side of the sealing ring (41).

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