Battery pack circuit breaking unit and battery box

Abstract

The utility model discloses a battery pack circuit break unit and battery box, it relates to battery technical field, it includes base, upper cover, a plurality of electrical elements, a plurality of support structure and a plurality of first staple bolt, the upper cover and base are arranged opposite to each other to make the upper cover and base form the installation space, the plurality of first staple bolt passes through the upper cover or base, and the plurality of first staple bolt passes through the base. The first clamping nails are connected to the ends, facing the upper cover or the base, of the supporting structures, a plurality of first clamping nails are arranged on the same supporting structure, the shortest vertical distance between every two adjacent first clamping nails on the same supporting structure is D1, and D1 is larger than or equal to 2 and smaller than or equal to 12 mm. According to the battery pack circuit breaking unit and the battery box, the supporting structure and the upper cover are connected through the first clamping nails, so that the upper cover can be conveniently connected to the supporting structure, and the overall strength of the multiple first clamping nails is effectively improved by limiting the shortest vertical distance between every two adjacent first clamping nails on the same supporting structure; and the supporting structure is tightly connected with the upper cover.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a battery pack circuit breaking unit and battery box. BACKGROUND

[0002] The battery pack circuit breaking unit is a power distribution unit, which can be opened and closed according to the needs of the power system, so as to achieve the purpose of power distribution.

[0003] The battery pack circuit breaking unit is generally designed inside the battery pack and is also a kind of power distribution box. At present, with the higher endurance and lower cost requirements of electric vehicles, the power battery is the core component of the electric vehicle, and is the highest proportion of the cost and weight of the vehicle parts, and the demand for its high integration is imminent. As the core electric control component inside the power battery, the high integration of the battery pack circuit breaking unit can improve the cost advantage, space advantage and weight advantage of the power battery, and is particularly important for the high integration of the power battery.

[0004] The existing battery pack circuit breaking unit generally adopts the cooperation design of the upper cover and the base, wherein one of the upper cover and the base is provided with a side frame to enclose the periphery of the electrical element, so that the electrical element is completely wrapped inside the upper cover and the base. In this type of battery pack circuit breaking unit, the side frame occupies a certain space, which not only increases the cost and weight of the battery pack, but also restricts the integration development of the battery pack circuit breaking unit. Although removing the side frame can improve the installation area of the electrical element in the base, the fixing strength of the upper cover is difficult to guarantee due to the lack of support of the side frame, and the battery pack circuit breaking unit is also prone to deformation. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a battery pack circuit breaking unit and a battery box, which set a clamping structure in the base and the upper cover to connect and fix them, so as to solve the problem that the fixing strength of the upper cover is difficult to guarantee after removing the side frame of the existing battery pack circuit breaking unit.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A battery pack circuit breaking unit comprises:

[0008] a base;

[0009] an upper cover arranged opposite to the base, and the upper cover and the base have an installation space therebetween;

[0010] a plurality of electrical elements arranged in the installation space, and the electrical elements are connected by a conductive element;

[0011] a plurality of support structures arranged in the mounting space to connect the base and the upper cover; and

[0012] a plurality of first clamps, the plurality of first clamps penetrating the upper cover or the base, connected to one end of the support structure towards the upper cover or the base, and the same support structure has a plurality of first clamps, and the shortest vertical distance between two adjacent first clamps on the same support structure is D1, and D1 satisfies: 2≤D1≤12mm.

[0013] In some embodiments, the outer edge of the upper cover is arranged in a gap with the outer edge of the base, so that the circumferential side of the mounting space is open.

[0014] In some embodiments, taking the plane where the base is located as a reference plane, the total area of the projection of the plurality of support structures on the reference plane is S1, and the projection area of the upper cover on the reference plane is S2, S1 and S2 satisfy:

[0015]

[0016] In some embodiments, taking the plane where the base is located as a reference plane, and taking the normal direction of the reference plane as a first direction, one end of the support structure is arranged in one of the base and the upper cover, and the other end of the support structure extends to the other along the first direction to contact.

[0017] In some embodiments, taking the plane where the base is located as a reference plane, and taking the normal direction of the reference plane as a first direction, the first clamp extends into the support structure along the first direction, and the length of the first clamp extending into the support structure is L1, the length of the support structure in the first direction is L2, and L1 and L2 satisfy:

[0018]

[0019] In some embodiments, the upper cover is provided with a recess, the upper cover is provided with a recess, the slot of the recess faces the base, and at least part of the electrical elements is accommodated in the recess.

[0020] In some embodiments, the number of recesses is a plurality, and at least part of the recesses extend to the outer edge of the upper cover.

[0021] Based on the above battery pack circuit breaking unit, the application also provides a battery box, which comprises:

[0022] a bottom plate;

[0023] at least four frame members arranged on the bottom plate and surrounding the bottom plate to form a receiving cavity;

[0024] at least one connecting beam arranged in the accommodating cavity to divide the accommodating cavity into at least two sub-cavities; and

[0025] any one of the foregoing battery pack circuit breaking units is mounted in one of the sub-cavities, wherein

[0026] the base is connected and fixed with the bottom plate, and the upper cover is connected and fixed with at least one of the frame members or the connecting beam.

[0027] In some embodiments, the projection area of the opening of the sub-cavity in which the battery pack circuit breaking unit is located on the reference plane is S3, and S2 and S3 satisfy:

[0028]

[0029] In some embodiments, the outer contour shape of the upper cover matches the opening shape of the sub-cavity in which the battery pack circuit breaking unit is located.

[0030] In some embodiments, the outer edge of the upper cover is provided with a flange portion, the flange portion is away from the mounting space in the direction from the base to the upper cover, and the flange portion is connected with the frame member.

[0031] In some embodiments, the outer edge of the upper cover is provided with a flange portion, the flange portion is away from the mounting space in the direction from the base to the upper cover, and the flange portion is connected with the frame member.

[0032] With the plane in which the base is located as a reference plane, and with the normal direction of the reference plane as a first direction, the direction perpendicular to the first direction is a second direction and a third direction, the flange portion is connected with the flange portion in the second direction, and the flange portion extends to the top of the connecting beam in the third direction and is connected and fixed with the connecting beam.

[0033] In some embodiments, the battery box further comprises a plurality of second clamps, the second clamps penetrate the flange portion, are connected to the connecting beam, and the shortest distance between two adjacent second clamps is D2, and D2 satisfies: 100≤D2≤200mm.

[0034] Compared with the prior art, the battery pack circuit breaking unit and the battery box implemented by the utility model have the beneficial effects that:

[0035] The battery pack circuit breaking unit and the battery box connect the support structure and the upper cover through the first rivet, so that the upper cover can be conveniently connected to the support structure, and by limiting the shortest vertical distance between the two adjacent first rivets on the same support structure, the fixing effect of the first rivet is avoided from being affected by the too large distance between the two adjacent first rivets, and the connection strength of the first rivet is avoided from being affected by the too small distance between the two adjacent first rivets, so that the overall strength of the plurality of first rivets is effectively improved, and the support structure and the upper cover are tightly connected.

[0036] Moreover, the battery pack circuit breaking unit and the battery box gap between the outer edge of the upper cover and the outer edge of the base, the circumferential side of the installation space is open, in this way, the base and the upper cover are not provided with the side wall for shielding the electrical element, the whole space of the base can be used for installing the electrical element, compared with the existing battery pack circuit breaking unit, the battery pack circuit breaking unit can save the original occupied space of the side wall, the volume of the battery pack circuit breaking unit is further reduced, which is beneficial to the integration of the battery pack product.

[0037] Moreover, the battery pack circuit breaking unit and the battery box gap between the outer edge of the upper cover and the outer edge of the base, the circumferential side of the installation space is open, in this way, the base and the upper cover are not provided with the side wall for shielding the electrical element, the whole space of the base can be used for installing the electrical element, compared with the existing battery pack circuit breaking unit, the battery pack circuit breaking unit can save the original occupied space of the side wall, the volume of the battery pack circuit breaking unit is further reduced, which is beneficial to the integration of the battery pack product.

[0038] Moreover, the battery pack circuit breaking unit and the battery box gap between the outer edge of the upper cover and the outer edge of the base, the circumferential side of the installation space is open, in this way, the base and the upper cover are not provided with the side wall for shielding the electrical element, the whole space of the base can be used for installing the electrical element, compared with the existing battery pack circuit breaking unit, the battery pack circuit breaking unit can save the original occupied space of the side wall, the volume of the battery pack circuit breaking unit is further reduced, which is beneficial to the integration of the battery pack product. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a schematic view of the battery pack circuit breaking unit in the embodiment of the utility model;

[0040] Figure 2 is a partial cross-sectional view of the battery pack circuit breaking unit in the embodiment of the utility model;

[0041] Figure 3 is Figure 2 is an enlarged view of A in FIG.

[0042] Figure 4 is a schematic view of the upper cover in the embodiment of the utility model;

[0043] Figure 5 is a schematic view of the battery box in the embodiment of the utility model;

[0044] Figure 6 is Figure 5 is an enlarged view of B in FIG.

[0045] Figure 7 is Figure 6 is an enlarged view of C in figure

[0046] Figure 8 is a schematic view of the box body structure of the battery box in the embodiment of the utility model.

[0047] In the figure, 100, battery pack circuit breaking unit;200, battery box;

[0048] 1, base;2, upper cover;20, flanging portion;21, recess;210, slot;22, folding edge portion;3, mounting space;4, reference surface;5, support structure;6, bottom plate;7, frame member;8, connecting beam;9, containing cavity;90, sub-cavity;10, first clamping nail;11, second clamping nail. DETAILED DESCRIPTION

[0049] The specific embodiments of the utility model are described in further detail below in combination with the drawings and embodiments. The following embodiments are used to illustrate the utility model, but not to limit the scope of the utility model.

[0050] In the description of the utility model, it should be understood that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to another element or indirectly connected to the other element. The terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanical connection, or electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific situation.

[0051] In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "height", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like in the utility model is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0052] In the description of the utility model, it should be understood that, in the utility model, the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features.

[0053] Embodiment

[0054] Reference Figures 1-3 The utility model discloses a kind of battery pack circuit breaking units 100, including base 1 and upper cover 2, wherein, base 1 is oppositely arranged with upper cover 2, to form installation space 3 between base 1 and upper cover 2.

[0055] A plurality of support structures 5 and a plurality of electrical elements (not shown in the figure) are provided in the installation space 3, wherein the plurality of electrical elements are electrically connected by a conductive member (not shown in the figure). The plurality of support structures 5 connect the base 1 and the upper cover 2 in the installation space 3, and the support structure 5 is connected to the upper cover 2 by a plurality of first clamps 10. The plurality of first clamps 10 penetrate the upper cover 2 and are connected to one end of the support structure 5 facing the upper cover 2. Each support structure 5 has a plurality of first clamps 10, and the shortest vertical distance D1 between adjacent two first clamps 10 on the same support structure 5 is 2-12 mm.

[0056] According to the specification size of the support structure 5 itself and the number of first clamps 10 arranged on one support structure 5, the shortest vertical distance D1 between adjacent two first clamps 10 on the same support structure 5 can be 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, or 12 mm.

[0057] The battery pack circuit breaking unit 100 connects the support structure 5 and the upper cover 2 through the first clamping nail 10, so that the upper cover 2 can be conveniently connected to the support structure 5. It can be understood that if the shortest vertical distance D1 between the first clamping nails 10 on the same support structure 5 is too large, the fixing effect of the first clamping nail 10 will be poor. If only one first clamping nail 10 is used on one support structure 5, the first clamping nail 10 is easy to be damaged, which leads to the fixing failure of the support structure 5 and the upper cover 2. If the shortest vertical distance D1 between the first clamping nails 10 is too small, the installation of the first clamping nail 10 will be affected, and the mounting holes of the support structure 5 are too close, which leads to the decrease of the strength of the support structure 5. Therefore, by limiting the shortest vertical distance D1 between the adjacent two first clamping nails 10 on the same support structure 5, the fixing effect of the first clamping nail 10 can be avoided due to the too large distance between the adjacent two first clamping nails 10, and the connection strength of the first clamping nail 10 can be avoided due to the too small distance between the adjacent two first clamping nails 10. The overall strength of the plurality of first clamping nails 10 is effectively improved, and the support structure 5 and the upper cover 2 are closely connected.

[0058] In the case that the battery pack circuit breaking unit 100 connects the base 1 and the upper cover 2 through the support structure 5, the support structure 5 can provide sufficient support strength for the base 1 and the upper cover 2. Therefore, the side wall structure of the upper cover 2 and the base 1 can be cancelled to simplify the structure of the upper cover 2 and the base 1, and provide more installation space 3 for the battery pack circuit breaking unit 100. Figures 1-3 As an example of the embodiment, the outer edge of the upper cover 2 is gap-set with the outer edge of the base 1, so that the peripheral side of the installation space 3 is open.

[0059] It should be noted that the gap-set of the outer edge of the upper cover 2 and the outer edge of the base 1 means that at least one of the upper cover 2 and the base 1 is not provided with a side wall structure. In this way, compared with the existing battery pack circuit breaking unit 100, the battery pack circuit breaking unit 100 can save the space of the side wall and improve the space utilization rate of the battery pack circuit breaking unit 100, which is beneficial to the integration of the battery pack product. Of course, due to the gap-set of the outer edge of the upper cover 2 and the outer edge of the base 1, the peripheral side of the installation space 3 is open. When the electrical element is assembled in the installation space 3, the peripheral side of the electrical element is exposed to the outside. However, when the battery pack circuit breaking unit 100 is assembled into the battery box 200, it can still close the electrical element by cooperating with the structure of the battery box 200, so that the electrical element is enclosed in the installation space 3.

[0060] When the support structure 5 is used as a connecting structure between the base 1 and the upper cover 2, since the support structure 5 is arranged in the mounting space 3, it will inevitably occupy a certain volume of the mounting space 3. In order to avoid the support structure 5 occupying too much volume and affecting the assembly of the electrical components, as an example of the present embodiment, the projection area of the support structure 5 on the reference surface 4 is S1, the projection area of the upper cover 2 on the reference surface 4 is S2, and S1 and S2 satisfy:

[0061]

[0062] Based on the assembly considerations, the electrical components themselves need to have a certain gap between adjacent electrical components. The support structure 5 can be arranged using these gaps. In this way, the battery pack circuit breaking unit 100 does not need to expand the occupied area of the base 1, and the support structure 5 can be arranged on the basis of the original base 1, so that the upper cover 2 and the base 1 are connected and fixed through the support structure 5, thereby forming a stable mounting space 3.

[0063] It can be understood that the shape of the support structure 5 is various, which can be arranged according to the space profile left by the electrical components. Of course, the support structure 5 can consider using a vertical arrangement as much as possible to ensure that the support structure 5 can better support the upper cover 2. Referring to Figure 2 , as an example of the present embodiment, the plane where the base 1 is located is taken as the reference surface 4, and the normal direction of the reference surface 4 is taken as the first direction. One end of the support structure 5 is arranged in one of the base 1 and the upper cover 2, and the other end of the support structure 5 extends to the other along the first direction to contact. The first clamping nail 10 is connected to the end of the support structure 5 and the base 1 or the upper cover 2 that contacts the end of the support structure 5, so that the two are connected and fixed. For example, if the support structure 5 is arranged in the upper cover 2, the end of the support structure 5 extends to the base 1 to contact. At this time, the first clamping nail 10 penetrates the base 1 and is connected to the end of the support structure 5 towards the base 1.

[0064] The support structure 5 can be arranged as a column structure, one end of the support structure 5 is formed in the base 1 or the upper cover 2, and the other end extends to the side where the other one is located until the other end contacts the upper cover 2 or the base 1. The number of support structures 5 can be configured according to the size of the upper cover 2 and the base 1. When the size of the upper cover 2 and the base 1 is large, the number of support structures 5 configured is correspondingly increased, and when the size of the upper cover 2 and the base 1 is small, the number of support structures 5 configured is correspondingly reduced.

[0065] Generally, the support structure 5 is arranged on the base 1, so that the battery pack circuit breaking unit 100 is assembled into the battery box 200. At this time, the end of the support structure 5 extends to the upper cover 2 to contact. The first clamping nail 10 is provided in the upper cover 2 and the end of the support structure 5, so that the upper cover 2 and the support structure 5 are connected and fixed.

[0066] Of course, in order to ensure that the first clamping nail 10 is connected to the support structure 5 stably, the length of the first clamping nail 10 extending into the support structure 5 needs to be ensured. Referring to Figure 2 , as an example of the present embodiment, the plane where the base 1 is located is taken as the reference surface 4, and the normal direction of the reference surface 4 is taken as the first direction. The first clamping nail 10 extends into the support structure 5 along the first direction, and the length of the first clamping nail 10 extending into the support structure 5 is L1. The length of the support structure 5 in the first direction is L2. L1 and L2 satisfy:

[0067]

[0068] Referring to Figure 2 , 4 , as an example of the present embodiment, the upper cover 2 is provided with a groove 21, wherein the groove 21 has a groove opening 210 facing the base 1, and at least part of the electrical elements are accommodated in the groove 21 and in contact with the groove bottom of the groove 21. One end of these electrical elements is connected to the base 1, and the other end is connected to the upper cover 2. In this way, these electrical elements can also play a supporting role. The upper cover 2 can use these electrical elements as the fulcrum of support, further improve the support area between the base 1 and the upper cover 2, and will not expand the lateral area of the upper cover 2.

[0069] The upper cover 2 is generally supported by a plate member, and the outer edge thereof is a weak structure area and is prone to collapse and deformation. Therefore, the number of grooves 21 can be set to be multiple according to the specification of the upper cover 2, and at least part of the grooves 21 extend to the outer edge of the upper cover 2, thereby forming a support point at the outer edge of the upper cover 2 to prevent the edge of the upper cover 2 from collapsing.

[0070] Referring to Figures 5-8 , based on the above-mentioned battery pack circuit breaking unit 100, the present embodiment further provides a battery box 200, the box structure of which comprises a bottom plate 6, a frame member 7 and a connecting beam 8. The bottom plate 6 is configured as one of the end plates of the battery box 200. The number of frame members 7 is four, and the four frame members 7 are arranged on the bottom plate 6 to form an accommodating cavity 9 together with the bottom plate 6. The number of connecting beams 8 is one, and one connecting beam 8 is arranged in the accommodating cavity 9 to divide the accommodating cavity 9 into two sub-cavities 90.

[0071] The above-mentioned battery pack circuit breaking unit 100 is installed in one of the sub-cavities 90. The base 1 of the battery pack circuit breaking unit 100 is connected and fixed to the bottom plate 6, and the upper cover 2 of the battery pack circuit breaking unit 100 is connected and fixed to at least one of the frame members 7 or the connecting beam 8.

[0072] It can be understood that the number of frame members 7 and connecting beams 8 can be adjusted according to the specification of the battery box 200 to make the battery box 200 have the required sub-cavities 90.

[0073] Generally, the outer contour shape of the upper cover 2 matches the shape of the opening of the sub-cavity 90 where the battery pack circuit unit 100 is located, so that the upper cover 2 can cover the opening of the sub-cavity 90 where the battery pack circuit unit 100 is located, and the electrical components are enclosed in the sub-cavity 90. For example, when the opening shape of the sub-cavity 90 is approximately rectangular, the outer contour shape of the upper cover 2 is also approximately rectangular, and one of the side edges of the upper cover 2 can be connected and fixed with a connecting beam 8, thereby further improving the structural strength of the upper cover 2.

[0074] The area of the upper cover 2 and the opening area of the corresponding sub-cavity 90 should reach a certain proportion, so as to ensure that the coverage area of the upper cover 2 can basically cover the opening of the corresponding sub-cavity 90. As an example of the present embodiment, the projected area of the opening of the sub-cavity 90 where the battery pack circuit unit 100 is located on the reference surface 4 is S3, and S2, S3 satisfy:

[0075]

[0076] By controlling the area of the upper cover 2, it can be ensured that the coverage area of the upper cover 2 can basically cover the opening of the corresponding sub-cavity 90, preventing foreign matter from entering the sub-cavity 90 where the battery pack circuit unit 100 is located, causing the battery pack circuit unit 100 to short circuit.

[0077] Reference Figure 4 , 6 -7, as an example of the present embodiment, the outer edge of the upper cover 2 can be provided with a flange portion 20 to strengthen the structural strength of the upper cover 2 itself and prevent the upper cover 2 from deforming. Moreover, the flange portion 20 is away from the mounting space 3 in the direction from the base 1 to the upper cover 2, which can avoid the flange portion 20 from invading the mounting space 3 and occupying the mounting position of the electrical components. The flange portion 20 can be in contact with the frame member 7, so as to ensure that the upper cover 2 can cover the opening of the corresponding sub-cavity 90.

[0078] Of course, the outer edge of the upper cover 2 is provided with a folded edge portion 22, which is arranged on the side of the upper cover 2 facing the connecting beam 8, so as to further improve the assembly strength of the upper cover 2. Reference Figures 6-7 , as an example of the present embodiment, taking the plane where the base 1 is located as the reference surface 4, and taking the normal direction of the reference surface 4 as the first direction, the direction orthogonal to the first direction is the second direction and the third direction, the folded edge portion 22 is connected with the flange portion 20 in the second direction, and the folded edge portion 22 extends to the top of the connecting beam 8 in the third direction and is connected and fixed with the connecting beam 8.

[0079] The folding part 22 and the connecting beam 8 can be connected and fixed by the second rivet 11 to ensure stable connection. As an example of the embodiment, the battery box 200 further comprises a plurality of second rivets 11, the second rivets 11 penetrate the folding part 22 and are connected to the connecting beam 8, and the shortest distance between adjacent two second rivets 11 is D2, and D2 satisfies: 100≤D2≤200mm, to ensure the connection strength of the second rivet 11.

[0080] In summary, the battery pack circuit breaking unit 100 and the battery box 200 provided by the embodiment of the utility model connect the support structure 5 and the upper cover 2 through the first rivet 10, so that the upper cover 2 can be conveniently connected to the support structure 5, and by limiting the shortest vertical distance between adjacent two first rivets 10 on the same support structure 5, the fixing effect of the first rivet 10 is avoided from being affected by the too large distance between the adjacent two first rivets 10, and meanwhile, the connection strength of the first rivet 10 is avoided from being affected by the too small distance between the adjacent two first rivets 10, so that the overall strength of the plurality of first rivets 10 is effectively improved, and the support structure 5 and the upper cover 2 are connected closely.

[0081] Furthermore, the battery pack circuit breaking unit 100 and the battery box 200 are characterized in that the outer edge of the upper cover 2 is arranged with a gap from the outer edge of the base 1, so that the circumferential side of the installation space 3 is open, and in this way, neither the base 1 nor the upper cover 2 is provided with a side wall for shielding electrical elements, and the entire space of the base 1 can be used for installing electrical elements, compared with the existing battery pack circuit breaking unit 100, the battery pack circuit breaking unit 100 can save the space of the side wall, so that the volume of the battery pack circuit breaking unit 100 is further reduced, which is conducive to the integration of the battery pack product.

[0082] Furthermore, the battery pack circuit breaking unit 100 and the battery box 200 are characterized in that the support structure 5 is arranged in the installation space 3, so that the circumferential side of the installation space 3 is open, and meanwhile, the upper cover 2 can have sufficient structural strength, and by controlling the area ratio of the support structure 5 and the upper cover 2, the support structure 5 is avoided from affecting the arrangement of electrical elements in the installation space 3.

[0083] Furthermore, the battery pack circuit breaking unit 100 and the battery box 200 are characterized in that the recess 21 is arranged at the upper cover 2, so that the recess 21 accommodates part of electrical elements and / or conductive members, so that the upper cover 2 can use these electrical elements and / or conductive members as support fulcrums, further improve the support area between the base 1 and the upper cover 2, and effectively prevent the outer edge of the upper cover 2 from collapsing.

[0084] The above description is only the preferred embodiment of the utility model, and it should be pointed out that for ordinary technical personnel in the technical field, some improvements and replacements can be made without departing from the technical principles of the utility model, and these improvements and replacements should also be regarded as the protection range of the utility model.

Claims

1. A battery pack circuit breaking unit, characterized by, The application relates to a battery pack circuit breaking unit, comprising: a base; an upper cover arranged opposite to the base, and having a mounting space between the base and the upper cover; a plurality of electrical elements arranged in the mounting space and connected by a conductive element; a plurality of support structures arranged in the mounting space to connect the base and the upper cover; and a plurality of first clamping nails penetrating the upper cover or the base, connected to one end of the support structure towards the upper cover or the base, and having a plurality of the first clamping nails on the same support structure, and the shortest vertical distance between two adjacent first clamping nails on the same support structure is D1, and D1 satisfies 2<=D1<=12mm. The outer edge of the upper cover is arranged in a gap with the outer edge of the base, so that the peripheral side of the mounting space is open.

2. The battery pack circuit breaking unit of claim 1, wherein, The total area of the support structures projected on the base plane is S1, and the projection area of the upper cover on the base plane is S2, and S1 and S2 satisfy:

3. The battery pack circuit breaking unit of claim 1, wherein, The one end of the support structure is arranged in one of the base and the upper cover, and the other end of the support structure extends to the other one along the first direction.

4. The battery pack circuit breaking unit of claim 3, wherein, The first clamping nail extends into the support structure along the first direction, and the length of the first clamping nail extending into the support structure is L1, and the length of the support structure in the first direction is L2, and L1 and L2 satisfy:

5. The battery pack circuit breaking unit of claim 1, wherein, The upper cover is provided with a groove, and the groove is arranged towards the base, and at least part of the electrical elements are arranged in the groove.

6. The battery pack circuit breaking unit of claim 1, wherein, The number of the grooves is plural, and at least part of the grooves extend to the outer edge of the upper cover.

7. The battery pack circuit breaking unit of claim 6, wherein, The application relates to a battery pack circuit breaking unit, comprising:

8. A battery box characterized by a base plate; at least four frame members arranged on the base plate and surrounding the base plate to form a containing cavity; at least one connecting beam arranged in the containing cavity to divide the containing cavity into at least two sub-cavities; and the battery pack circuit breaking unit of any one of claims 1-7 is arranged in one of the sub-cavities, wherein the base is fixedly connected with the base plate, and the upper cover is fixedly connected with the at least one connecting beam. The projection area of the opening of the sub-cavity where the battery pack circuit breaking unit is arranged on the base plane is S3, and S2 and S3 satisfy:

9. The battery pack of claim 8, wherein, The outer contour shape of the upper cover matches the opening shape of the sub-cavity where the battery pack circuit breaking unit is arranged.

10. The battery pack of claim 8, wherein, The outer edge of the upper cover is provided with a flanging part, the flanging part is away from the mounting space in the direction from the base to the upper cover, and the flanging part is connected with the frame member.

11. The battery pack of claim 8, wherein, The outer edge of the upper cover is provided with a flanging part, the flanging part is away from the mounting space in the direction from the base to the upper cover, and the flanging part is connected with the frame member, and the outer edge of the upper cover is provided with a folding part arranged on the side of the upper cover towards the connecting beam; and 12. The battery pack of claim 8, wherein, ​ The base is taken as a reference surface, and the normal direction of the reference surface is taken as a first direction, and the direction orthogonal to the first direction is taken as a second direction and a third direction. The folding edge part is connected to the folding edge part in the second direction, and extends to the top of the connecting beam in the third direction, and is connected and fixed to the connecting beam.

13. The battery pack of claim 12, wherein, The battery box further comprises a plurality of second clamps, the second clamps penetrating the folding edge part, being connected to the connecting beam, and the shortest distance between two adjacent second clamps being D2, and D2 satisfying: 100≤D2≤200mm.

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