Battery pack circuit breaker unit, battery pack and vehicle

Abstract

A battery pack circuit breaker unit, a battery pack, and a vehicle are disclosed. The battery pack circuit breaker unit includes: a base, a cover, and a support portion. At least a portion of the cover and the base enclose a cavity for accommodating the support portion. The base has a plurality of support pillars. The support portion has a first hole and a second hole corresponding to the support pillars. The first hole is precisely positioned with respect to the support pillars in both the length and width directions of the support portion. The second hole is coarsely positioned with respect to the support pillars in the length direction and precisely positioned with respect to the support pillars in the width direction. By setting the first and second holes with different positioning accuracies, the support portion can be quickly and accurately fixed to the base, improving efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle parts, specifically relating to a battery pack circuit breaker unit, a battery pack, and a vehicle. Background Technology

[0002] To further protect the power battery and prevent harm to personnel in the event of battery damage, a control box is typically installed on the power battery. Generally, the control box includes a Power Distribution Unit (PDU) and a Battery Disconnect Unit (BDU). The BDU is usually located inside the power battery and is controlled by an external control system to provide functions such as charge / discharge control and circuit overload protection.

[0003] However, in existing battery pack circuit breaker units, due to their overall long size and the need for precise positioning between multiple components, installation is often difficult and time-consuming, resulting in low manufacturing efficiency of the entire battery pack circuit breaker unit. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a battery pack circuit breaker unit, a battery pack, and a vehicle to solve the problem of low assembly efficiency of existing battery pack circuit breaker units.

[0005] To achieve the above objectives, a first aspect of this utility model provides a battery pack circuit breaker unit comprising: a base, a cover, and a support portion, wherein at least a portion of the cover and the base enclose a cavity for accommodating the support portion, wherein a plurality of supports are provided on the base; the support portion is provided with a first hole and a second hole corresponding to the supports, wherein the first hole is configured to be precisely positioned with respect to the supports in both the length and width directions of the support portion, and the second hole is configured to be coarsely positioned with respect to the supports in the length direction of the support portion and precisely positioned with respect to the supports in the width direction.

[0006] In one embodiment of this utility model, a third hole is also provided on the support portion, and the third hole is configured to be roughly positioned with the support column in both the length and width directions of the support portion.

[0007] In one embodiment of this utility model, the first hole and the second hole are located at both ends of a diagonal of the bracket portion, and the third hole is located on the other diagonal of the bracket portion.

[0008] In one embodiment of this utility model, the diameter of the support column is 10mm and the diameter of the third hole is 11mm.

[0009] In one embodiment of this utility model, the diameter of the support column is 10mm, the diameter of the first hole is 10.4mm, and the length of the second hole is 11mm and the width is 10.4mm.

[0010] In one embodiment of this utility model, the base includes a bottom surface and a first surface, a second surface, a third surface and a fourth surface sequentially disposed on the bottom surface. The first surface, the second surface, the third surface and the fourth surface surround the bottom surface to form a hollow shell structure. The cover is at least partially detachably fixed to the base to form the cavity. The height of the second surface is greater than the height of the fourth surface, and the heights of the first surface and the third surface are the same.

[0011] In one embodiment of this utility model, the first surface and the third surface are provided with grooves that can match the cover, wherein the number of grooves on the first surface and the number of grooves on the third surface are different, and / or the grooves on the first surface and the grooves on the third surface do not correspond to each other.

[0012] In one embodiment of this utility model, the height of the groove on the third surface near the second surface is higher than the height of the groove on the third surface near the fourth surface, so that the third surface presents a stepped structure on both sides of the groove; and / or, the heights of the edges on both sides of the groove on the first surface are different, so that the first surface presents a stepped structure.

[0013] As one embodiment of the present invention, the battery pack circuit breaker unit further includes a first contactor and a second contactor arranged adjacent to each other without interference. The first contactor and the second contactor are housed in the base and arranged without interference with the bracket portion. The first contactor and the second contactor each have two leads. The two leads of the first contactor are both located on the side facing the third surface, and the two leads of the second contactor are located on the side facing the first surface.

[0014] In one embodiment of this utility model, a slot is provided on the cover, and a block is provided on the outer wall of the base that is detachably connected to the slot.

[0015] A second aspect of this utility model provides a battery pack, including a battery upper shell, a battery lower shell, battery modules, and a battery pack circuit breaker unit as described in the first aspect of this utility model. The battery pack circuit breaker unit and a plurality of battery modules are fixedly disposed within a battery cavity formed by the battery upper shell and the battery lower shell. The plurality of battery modules are electrically connected to the battery pack circuit breaker unit, and the battery pack circuit breaker unit is disposed on the front side of the battery modules.

[0016] A third aspect of this utility model provides a vehicle that includes the battery pack circuit breaker unit described in the first aspect of this utility model, or includes the battery pack described in the second aspect of this utility model.

[0017] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects: by setting first holes and second holes with different positioning accuracies, it is possible to quickly and accurately fix the bracket to the base, thereby improving efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an exploded view of a battery pack circuit breaker unit provided in a specific embodiment of this utility model;

[0020] Figure 2 This is a structural diagram of the support portion and base portion of the battery pack circuit breaker unit provided in a specific embodiment of this utility model;

[0021] Figure 3 This is a structural diagram of a battery pack circuit breaker unit provided in a specific embodiment of the present invention;

[0022] Figure 4 This is a structural diagram of the battery pack circuit breaker unit provided in a specific embodiment of the present invention from another perspective.

[0023] Explanation of reference numerals in the attached figures:

[0024] 100. Base; 110. Bottom surface; 111. First surface; 112. Second surface; 113. Third surface; 114. Fourth surface; 120. Groove; 130. First contactor; 131. First connecting copper busbar; 132. Second connecting copper busbar; 140. Second contactor; 141. Third connecting copper busbar; 142. Fourth connecting copper busbar; 150. Support; 320. Locking block;

[0025] 200. Cover; 210. Slot;

[0026] 300, bracket part; 310, fixing hole; 311, first hole; 312, second hole; 313, third hole. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustration and explanation of the present utility model, and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "up," "down," "left," "right," "front," and "back" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0028] It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of embodiments of this utility model. Furthermore, the descriptions of each embodiment in the following embodiments have their own emphasis; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0029] Please see Figure 1-4 The figure shows a battery pack circuit breaker unit, including a detachably fixed base 100, a cover 200, and a support 300. At least a portion of the cover 200 and the base 100 enclose a cavity, and the support 300 is accommodated within the cavity formed by the base 100 and the cover 200 and is detachably fixed to the base 100.

[0030] The base 100 is a hollow, open shell-like structure, including a bottom surface 110 and four surfaces 111, 112, 113, and 114 disposed on the bottom surface 110. These surfaces enclose one side of the bottom surface 110 to form an open cavity structure. The first surface 111 and the third surface 113 are positioned opposite each other, as are the second surface 112 and the fourth surface 114. The height of the second surface 112 is greater than the height of the fourth surface 114, while the heights of the first surface 111 and the third surface 113 are the same. This arrangement aims to minimize the size of the entire battery pack circuit breaker unit, thereby reducing space occupation and optimizing the overall space layout and use of the vehicle.

[0031] Furthermore, multiple protrusions are provided on the surfaces of the cover 200 corresponding to the first surface 111 and the third surface 113 of the base 100. Correspondingly, grooves 120 that match the cover 200 are provided at different positions on the first surface 111 and the third surface 113 of the base 100. This arrangement aims to improve the installation efficiency of the operator during the installation process and achieve a foolproof design. Preferably, the number of grooves 120 on the first surface 111 and the third surface 113 is different, thereby better preventing foolproof operation during installation. Correspondingly, the number of protrusions on the surfaces of the cover 200 corresponding to the first surface 111 and the third surface 113 of the base 100 is different.

[0032] Furthermore, the grooves 120 on the first surface 111 and the grooves 120 on the third surface 113 do not correspond to each other. Preferably, the grooves 120 on the third surface 113 are disposed among the plurality of grooves 120 on the first surface 111. For example, in Figure 2 In this specific embodiment, two grooves 120 are provided on the first surface 111, and one groove 120 is provided on the third surface 113. The groove 120 on the third surface 113 is located between the two grooves 120 on the first surface 111. The advantage of this arrangement is that it can better prevent foolproof operation and also improve the component strength of the entire base 100, thereby increasing its resistance to external impacts.

[0033] Furthermore, the heights of the sides of the groove 120 on the third surface 113 are different. The height of the side of the groove 120 on the third surface 113 closer to the second surface 112 is higher than the height of the side of the groove 120 on the third surface 113 closer to the fourth surface 114, making the third surface 113 have a stepped structure on both sides of the groove 120. Similarly, the heights of the sides of the groove 120 on the first surface 111 are also different, making the first surface 111 have a stepped structure. When multiple grooves 120 are provided on the first surface 111, the height of the side length between the multiple grooves 120 can be the same as the height of the side closer to the second surface 112, or the same as the height of the side closer to the fourth surface 114, or somewhere in between. This utility model does not limit this.

[0034] Please continue reading. Figure 1-2The base 100 also includes a first contactor 130 and a second contactor 140 arranged without interference. The first contactor 130 and the second contactor 140 are detachably fixed on the bottom surface 110, and each of the first contactor 130 and the second contactor 140 has two leads. The first contactor 130 and the second contactor 140 are arranged adjacent to each other and do not interfere with each other. The two leads of the first contactor 130 are both located on the side facing the third surface 113, and the two leads of the second contactor 140 are located on the side facing the first surface 111.

[0035] The two leads of the first contactor 130 are electrically connected to other components through the first connecting copper busbar 141 and the second connecting copper busbar 142, respectively. The two leads of the second contactor 140 are electrically connected to other components through the third connecting copper busbar 141 and the fourth connecting copper busbar 142, respectively.

[0036] Please continue reading. Figure 1-2 The base 100 is provided with a plurality of supports 150 for fixing the support portion 300. The plurality of supports 150 are of the same size, for example in Figure 2 In this specific embodiment, the support column 150 is a cylindrical structure with a diameter of φ10mm. The support portion 300 is provided with fixing holes 310 that match each support column 150, so that the support portion 300 is positioned at a predetermined location. The fixing holes 310 include a first hole 311 and a second hole 312, which are generally located along the same diagonal direction of the support portion 300. Figure 2 In this specific embodiment, the support portion 300 is a generally rectangular structure, with the first hole 311 and the second hole 312 arranged along the diagonal. The first hole 311 is located on the support portion 300 near the intersection of the third surface 113 and the fourth surface 114, and the second hole 312 is located on the support portion 300 near the intersection of the first surface 111 and the second surface 112.

[0037] Furthermore, the first hole 311 is configured for precise positioning with the support column 150, and the second hole 312 is configured for coarse positioning with the support column 150. Precise positioning means that the size of the hole is equal to or slightly larger than the size of the support column 150 in the corresponding direction, achieving more accurate installation; coarse positioning means that the size of the hole is larger than the size of the support column 150 in the corresponding direction, allowing for greater installation space in the corresponding direction.

[0038] Preferably, the first hole 311 is configured to be precisely positioned relative to the support column 150 in both the length and width directions of the bracket portion 300. That is, the diameter of the first hole 311 is equal to or slightly larger than the size of the support column 150, thereby allowing the first hole 311 to be fixed to the support column 150 within a set tolerance range. The second hole 312 is configured to be coarsely positioned relative to the support column 150 in the length direction and precisely positioned in the width direction. That is, the length dimension of the second hole 312 is larger than the size of the support column 150, while its width dimension is slightly larger than the size of the support column 150. The length direction of the second hole 312 is consistent with the length directions of the first surface 111 and the third surface 113. For example, in... Figure 2 In this specific embodiment, the first hole 311 is a circular hole with a diameter of φ10.4mm, which is slightly larger than the size of the support column 150, so that the first hole 311 can be well fitted onto the support column 150; the second hole 312 is an oval-shaped hole with a length of 11mm and a width of 10.4mm.

[0039] The purpose of this design is that, since the entire base 100 is a long and narrow rectangular structure, with its length much greater than its width, and the support portion 300 is also a long and narrow rectangular structure, if the size of the fixing holes 310 on the support portion 300 is slightly larger than the size of the support column 150, it will require operators to spend a considerable amount of time matching the support portion 300 and the base 100, thus significantly reducing the assembly efficiency of the entire battery pack circuit breaker unit. Furthermore, to ensure that the support portion 300 can match the base 100, the manufacturing precision requirements for the entire support portion 300 are high, directly increasing the manufacturing cost of the entire battery pack circuit breaker unit.

[0040] By setting the first hole 311 and the second hole 312, the size of the first hole 311 is slightly larger than the size of the support column 150, while the length direction of the second hole 312 is consistent with the length direction of the bracket part 300, and the length direction of the second hole 312 is larger than the size of the support column 150, while the width direction of the second hole 312 is slightly larger than the size of the support column 150. When the bracket part 300 needs to be installed on the base 100, the operator first fits the first hole 311 onto the corresponding support column 150, and then fits the second hole 312 onto the corresponding support column 150. Since the length dimension of the second hole 312 is larger than the dimension of the support column 150, the operator can quickly fix the bracket part 300 onto the cover part 200 without precise positioning. Furthermore, since the dimensions of the first hole 311 and the width dimension of the second hole 312 of the bracket part 300 are only slightly larger than the dimensions of the support column 150, the width limitation of the first hole 311 and the second hole 312 can ensure that the tolerance of the entire bracket part 300 fixed on the base 100 is within the set range, thus improving installation efficiency while maintaining installation accuracy.

[0041] Furthermore, the base 100 also includes a third hole 313, of which multiple third holes 313 are provided. Correspondingly, a matching support post 150 is provided on the base 100 at the position corresponding to the third hole 313. The third hole 313 is configured to be coarsely positioned with the support post 150 in both the length and width directions of the support portion 300. Preferably, the third hole 313 is provided on another diagonal line of the base 100 near the end. The dimensions of the third hole 313 in both the length and width directions are larger than the dimensions of the support post 150, thereby achieving better positioning of the support portion 300 and the base 100. More preferably, two third holes 313 are provided, respectively provided on another diagonal line of the base 100 near the end. Figure 2 In this specific embodiment, two third holes 313 are respectively located on the support portion 300 near the intersection of the first surface 111 and the fourth surface 114, and near the intersection of the second surface 112 and the third surface 113. Preferably, the diameter of the third hole 313 is 11 mm.

[0042] Therefore, by setting three holes of different sizes—the first hole 311, the second hole 312, and the third hole 313—it is possible to quickly and accurately fix the bracket part 300 onto the base 100, thereby improving efficiency.

[0043] Please continue reading. Figure 1-4The cover 200 is provided with a slot 210, and the outer wall of the base 100 is provided with a locking block 320 that matches the slot 210. The slot 210 can be locked onto the locking block 320, thereby realizing a detachable connection between the cover 200 and the base 100. Preferably, multiple slots 210 are provided, and the multiple slots 210 are located at positions corresponding to the locking blocks 320 on the outer walls of the first surface 111, the second surface 112, and the third surface 113 of the base 100, thereby realizing a detachable fixation between the cover 200 and the base 100.

[0044] In addition, this utility model also provides a battery pack, including a battery upper shell, a battery lower shell, battery modules and the aforementioned battery pack circuit breaker unit. The battery pack circuit breaker unit and multiple battery modules are fixedly disposed in the battery cavity formed by the battery upper shell and the battery lower shell. The multiple battery modules are electrically connected to the battery pack circuit breaker unit, and the battery pack circuit breaker unit is disposed on the front side of the battery modules.

[0045] In addition, this utility model also provides a vehicle including the aforementioned battery pack circuit breaker unit, or the aforementioned battery pack.

[0046] 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.

[0047] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0048] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0049] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

Claims

1. A battery pack circuit breaker unit, characterized in that, include: A base, a cover, and a support portion, wherein at least a portion of the cover and the base enclose a cavity for accommodating the support portion, wherein a plurality of supports are provided on the base; and a first hole and a second hole corresponding to the supports are provided on the support portion. The first hole is configured to be precisely positioned with respect to the support column in both the length and width directions of the bracket portion, and the second hole is configured to be roughly positioned with respect to the support column in the length direction of the bracket portion and precisely positioned with respect to the support column in the width direction.

2. The battery pack circuit breaker unit according to claim 1, characterized in that, The support portion is also provided with a third hole, which is configured to be roughly positioned with the support column in both the length and width directions of the support portion. The first hole and the second hole are located at opposite ends of a diagonal line of the bracket portion, and the third hole is located on the other diagonal line of the bracket portion.

3. The battery pack circuit breaker unit according to claim 2, characterized in that, The diameter of the support column is 10mm, the diameter of the first hole is 10.4mm, the length dimension of the second hole is 11mm, the width dimension is 10.4mm, and the diameter of the third hole is 11mm.

4. The battery pack circuit breaker unit according to any one of claims 1-3, characterized in that, The base includes a bottom surface and a first surface, a second surface, a third surface, and a fourth surface sequentially disposed on the bottom surface. The first surface, the second surface, the third surface, and the fourth surface enclose a hollow, open shell-like structure on the bottom surface. The cover is at least partially detachably fixed to the base to form the cavity. The height of the second surface is greater than the height of the fourth surface, and the heights of the first surface and the third surface are the same.

5. The battery pack circuit breaker unit according to claim 4, characterized in that, The first surface and the third surface are provided with grooves that can match the cover portion, wherein The number of grooves on the first surface is different from the number of grooves on the third surface, and / or the grooves on the first surface and the grooves on the third surface do not correspond to each other.

6. The battery pack circuit breaker unit according to claim 5, characterized in that, The height of the groove on the third surface near the second surface is higher than the height of the groove on the third surface near the fourth surface, so that the third surface presents a stepped structure on both sides of the groove. And / or, the heights of the edges on both sides of the groove on the first surface are different, so that the first surface presents a stepped structure.

7. The battery pack circuit breaker unit according to claim 4, characterized in that, It also includes a first contactor and a second contactor arranged adjacent to each other without interference. The first contactor and the second contactor are housed in the base and arranged without interference with the support portion. The first contactor and the second contactor each have two leads. The two leads of the first contactor are both located on the side facing the third surface, and the two leads of the second contactor are located on the side facing the first surface.

8. The battery pack circuit breaker unit according to claim 4, characterized in that, The cover is provided with a slot, and the outer wall of the base is provided with a card block that can be detachably connected to the slot.

9. A battery pack, characterized in that, The battery pack includes an upper battery casing, a lower battery casing, a battery module, and a battery pack circuit breaker unit as described in any one of claims 1-8. The battery pack circuit breaker unit and a plurality of battery modules are fixedly disposed within the battery cavity formed by the upper battery casing and the lower battery casing. The plurality of battery modules are electrically connected to the battery pack circuit breaker unit, and the battery pack circuit breaker unit is disposed on the front side of the battery module.

10. A vehicle, characterized in that, It includes the battery pack circuit breaker unit as described in any one of claims 1-8, or the battery pack as described in claim 9.

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