Battery box and battery pack

Abstract

The utility model provides a battery box and a battery pack. The battery box comprises a box body and a cross beam, the box body comprises a box body beam; the cross beam is arranged in the box body and connected with the box body beam so as to divide the box body into a battery bin and an electrical bin, and the end part of the cross beam is hermetically connected with the box body beam. The utility model aims to solve the problems that a gap exists between a cross beam and a box body and the sealing performance is poor in the prior art.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to a battery box and battery pack. BACKGROUND

[0002] In the related art, the battery box is used as a structure for covering and installing a battery pack, in order to isolate the battery pack from the external environment, the battery box body is in a closed state, and the whole closed battery box body is used, the inside is separated into a battery part and an electrical part through a baffle and the like, in order to facilitate wire layout, the height of the baffle is usually less than the overall height of the battery box, so that a gap exists between the two cover plates and the baffle, and the sealing performance of the battery box is poor. SUMMARY

[0003] Embodiments of the utility model provide a battery box and a battery pack, and the utility model aims at solving the problem of poor sealing performance between the cross beam and the box body in the related art.

[0004] In a first aspect, embodiments of the utility model provide a battery box, which comprises:

[0005] A box body, the box body comprising a box beam;

[0006] A cross beam arranged in the box body and connected with the box beam to separate the box body into a battery compartment and an electrical compartment, and the end portion of the cross beam is sealingly connected with the box beam.

[0007] In an embodiment, the cross beam and the box beam are integrally formed by die casting or integrally formed by casting.

[0008] In an embodiment, the utility model further comprises:

[0009] A connecting piece arranged on the cross beam, and the end portion of the cross beam is connected to the box beam through the connecting piece;

[0010] A sealing piece abutting between the end portion of the cross beam and the box beam and used for sealingly connecting the end portion and the box beam.

[0011] In an embodiment, the connecting piece comprises a first portion and two second portions, the first portion is connected between the two second portions, the first portion is arranged on the cross beam, and the two second portions extend out of the end portion of the cross beam and are connected with the box beam.

[0012] In an embodiment, the cross beam comprises a body portion arranged between two end portions, the two end portions are connected with the box beam, and along the height direction of the box body, the height of the two end portions is lower than the height of the body portion.

[0013] In an embodiment, the height of the end portion is tapered in the direction in which the body portion points to the end portion.

[0014] In an embodiment, an angle between a side of the cross beam facing away from the bottom of the box and a side of the body portion facing away from the bottom of the box is alpha, 130°≤alpha≤140°.

[0015] In an embodiment, the body portion is provided with a plurality of through holes configured to pass through the cooling pipe and / or the connection wire harness.

[0016] In an embodiment, a plurality of sealing pads are further included, and the plurality of sealing pads are correspondingly arranged in the plurality of through holes.

[0017] In a second aspect, an embodiment of the utility model provides a battery pack, comprising a battery box, the battery box comprises:

[0018] The box comprises a box beam;

[0019] The cross beam is arranged in the box and connected with the box beam to divide the box into a battery compartment and an electrical compartment, and the end of the cross beam is sealingly connected with the box beam.

[0020] The embodiment of the utility model has the advantages of:

[0021] In the technical scheme of the utility model, the battery box is simple in structure and good in sealing, and can isolate the battery compartment and the electrical compartment from each other to avoid mutual interference; specifically, the cross beam is installed in the box and connected with the box beam to divide the box into the battery compartment and the electrical compartment, the battery compartment is used for installing batteries, and the electrical compartment is used for installing electrical components; the cross beam is sealingly connected with the box beam, can isolate the battery compartment and the electrical compartment, so that the battery compartment is a sealed chamber, the electrical compartment is a sealed chamber, and mutual interference between the two does not exist, thereby improving the safety of the battery box. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0023] Figure 1 It is a perspective view of the battery box provided by the embodiment of the utility model;

[0024] Figure 2 It is Figure 1 the structure schematic view of the cross beam and the connecting piece in the embodiment;

[0025] Figure 3 It is Figure 1 the front view of the cross beam in the embodiment;

[0026] Figure 4 It is Figure 3An enlarged schematic view at A.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] Reference Name Reference Name 100 Battery box 211 Electrical via 1 Box body 212 Water pipe via 11 Box body beam 22 End 12 Bottom plate 23 Body part 13 Battery compartment 3 Connector 14 Electrical compartment 31 First part 2 Cross beam 32 Second part 21 Via DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'up' and 'down' are generally used for indicating the up and down in the actual use or working state of the device, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0030] In the related art, the battery box is used for covering and installing the battery pack, in order to isolate the battery pack from the external environment, the battery box body is in a closed state, the overall closed battery box body is adopted, the box body is divided into a battery part and an electrical part by a baffle structure, in order to facilitate the layout of the wire, the height of the baffle is less than the overall height of the battery box, so that there is a gap between the two cover plates and the baffle, and the sealing property of the battery box is poor.

[0031] Therefore, the utility model provides a battery box 100, Figures 1 to 4 The structure schematic diagram of one embodiment of the battery box 100 provided by the utility model is simple in structure and good in sealing property, and the battery box 100 provided by the utility model will be described in detail in connection with the main drawings.

[0032] Please refer to Figure 1 One embodiment of the utility model provides a battery box 100, the battery box 100 includes a box body 1 and a cross beam 2, the box body 1 includes a box beam 11, the cross beam 2 is arranged in the box body 1 and is connected with the box beam 11, so as to divide the box body 1 into a battery compartment 13 and an electrical compartment 14, and the end 22 of the cross beam 2 is sealingly connected with the box beam 11.

[0033] The battery box 100 is simple in structure, good in sealing, and capable of isolating the battery compartment 13 and the electrical compartment 14 from each other to avoid mutual interference.

[0034] In the embodiment, the box body 1 comprises a bottom plate 12 and a box beam 11, the box beam 11 is arranged around the bottom plate 12, a containing cavity is formed between the box beam 11 and the bottom plate 12, and the cross beam 2 is arranged in the containing cavity to divide the containing cavity into the battery compartment 13 and the electrical compartment 14.

[0035] More specifically, the box beam 11 comprises a first beam body and a second beam body oppositely arranged along the length direction of the box body 1, and a third beam body and a fourth beam body oppositely arranged along the width direction of the box body 1, and the third beam body and the fourth beam body are connected between the first beam body and the second beam body.

[0036] In the embodiment, please continue to refer to Figure 1 The cross beam 2 is connected between the first beam body and the second beam body, and the cross beam 2 and the third beam body and the fourth beam body are arranged in parallel with each other to ensure the utilization rate of space.

[0037] It should be noted that the connection mode between the cross beam 2 and the box beam 11 is not limited, as long as the sealing connection can be achieved to separate the electrical compartment 14 and the battery compartment 13 and make them not communicate with each other.

[0038] In the present embodiment, after the batteries in the battery compartment 13 are arranged, glue needs to be injected into the battery compartment 13. On the one hand, the glue can play a buffering role to avoid damage to the batteries due to vibration and other reasons during transportation. On the other hand, the glue can separate the batteries from the outside world to avoid the pollution and damage of the batteries by dust and water vapor from the outside world. In addition, the glue can separate the batteries from each other to avoid the spread of heat when the batteries are out of control, and at the same time, the glue can also improve heat transfer, so that the heat generated by the batteries can be quickly transferred to the cooling device, improving the cooling efficiency.

[0039] The purpose of separating the battery compartment 13 and the electrical compartment 14 into independent spaces is to avoid the penetration of glue between the cross beam 2 and the box beam 11 when the glue is injected into the battery compartment 13, so as to avoid the penetration of glue in the battery compartment 13 into the electrical compartment 14, thereby avoiding the pollution of the electrical components in the electrical compartment 14.

[0040] In some embodiments, the installation position of the cross beam 2 is not limited and can be adjusted adaptively according to the number of batteries in the battery compartment 13 and the number of electrical components in the electrical compartment 14.

[0041] In some embodiments, the cross beam 2 and the box beam 11 are integrally formed by die casting. In some embodiments, the cross beam 2 and the box beam 11 are integrally formed by casting. Specifically, the integrally formed manner by die casting and the integrally formed manner by casting can be set according to the conventional setting in the art, which will not be described here. By the integrally formed manner, the gap between the cross beam 2 and the box 1 can be avoided, so as to avoid the penetration of glue from the battery compartment 13 to the electrical compartment 14 when the glue is injected, thereby avoiding the pollution of the electrical components in the electrical compartment 14.

[0042] In some embodiments, the box beam 11, the cross beam 2 and the bottom plate 12 are separately provided. Specifically, the box beam 11 is first welded to the bottom plate 12, and then the cross beam 2 is welded to the box beam 11. The specific type of the cross beam 2 and the box beam 11 is not limited and can be a solid beam or a hollow beam, which can be selected according to the actual situation. In the present embodiment, the box beam 11 is a solid beam, which has higher structural strength and can improve the overall structural strength of the battery box 100.

[0043] In some embodiments, the cross beam 2 and the box beam 11 are separately provided and connected by the connecting piece 3. Specifically, the connecting piece 3 is arranged on the cross beam 2 and fixedly connected with the cross beam 2, and the connecting piece 3 is also fixedly connected with the box beam 11, so that the cross beam 2 and the box beam 11 are fixedly connected. Further, in order to ensure the sealing, a sealing member is arranged between the box beam 11 and the cross beam 2. During installation, the sealing member is arranged between the box beam 11 and the cross beam 2, and the box beam 11 and the cross beam 2 press the sealing member, so that the sealing member is tightly abutted between the box beam 11 and the cross beam 2, thereby achieving the sealing effect.

[0044] Please refer to Figure 1 and Figure 2 The connecting piece 3 includes a first part 31 and two second parts 32, the first part 31 is connected between the two second parts 32, the first part 31 is arranged on the cross beam 2, a plurality of first mounting holes are formed on the first part 31, a plurality of first threaded holes corresponding to the plurality of first mounting holes are formed on the cross beam 2, the battery box 100 further includes a plurality of first bolts, each first bolt passes through the first mounting hole and is threadedly connected with the corresponding first threaded hole, so as to fix the first part 31 on the cross beam 2, further, in order to improve the sealing between the cross beam 2 and the box body 1, a sealing sheet can also be arranged between the first part 31 and the cross beam 2, the sealing sheet is extruded by the first part 31 and the cross beam 2, so as to fill between the first part 31 and the cross beam 2, thereby avoiding the gap between the first part 31 and the cross beam 2, and improving the sealing of the cross beam 2 and the box body 1.

[0045] Further, the battery box 100 further includes an upper cover, a plurality of second mounting holes corresponding to the plurality of first mounting holes are formed on the upper cover, during installation, the first part 31 is first placed on the cross beam 2, so that the first mounting hole corresponds to the first threaded hole, then the upper cover is arranged on the first part 31, so that the second mounting hole on the upper cover corresponds to the first mounting hole, and the first bolt passes through the second mounting hole, the first mounting hole and the first threaded hole in sequence. In some embodiments, in order to provide the sealing between the cross beam 2 and the upper cover, a sealing sheet is also arranged between the first part 31 and the upper cover, the sealing sheet is extruded by the first part 31 and the upper cover, so as to fill between the first part 31 and the upper cover, thereby avoiding the gap between the cross beam 2 and the upper cover, and improving the sealing of the battery box 100.

[0046] Please continue to refer to Figure 2 In some embodiments, the two second parts 32 are respectively connected at two ends of the first part 31, and the two second parts 32 extend out of the end portion 22 of the cross beam 2 and are connected with the box beam 11. Specifically, a third mounting hole is formed on each second part 32, a second threaded hole is formed on the box beam 11, and the battery box 100 further includes a second bolt, the second bolt passes through the second mounting hole and cooperates with the second threaded hole, so as to fix the cross beam 2 on the box beam 11.

[0047] It should be noted that, in order to ensure the stability of the connection, the first part 31 and the second part 32 are integrally formed.

[0048] In some embodiments, the battery box 100 further includes a sealing piece arranged between the cross beam 2 and the box beam 11, for filling the gap between the cross beam 2 and the box beam 11, avoiding the glue in the battery compartment 13 from penetrating into the electrical compartment 14 through the gap, and improving the sealing of the battery box 100.

[0049] Please refer to Figure 3In some embodiments, the cross beam 2 comprises a body portion 23, the body portion 23 is arranged between two end portions 22, the two end portions 22 are connected with the box beam 11, and the height of the two end portions 22 is lower than the height of the body portion 23 along the height direction of the box 1. In the present embodiment, the height of the two end portions 22 is lower than the height of the body portion 23 in order to avoid the upper cover, so that the upper cover can cooperate with the box beam 11.

[0050] In some embodiments, please refer to Figure 3 and Figure 4 , the height of the end portion 22 is tapered in the direction of the body portion 23 pointing to the end portion 22. More specifically, the end portion 22 of the cross beam 2 is arranged obliquely, so that the upper end surface of the end portion 22 and the upper end surface of the body portion 23 form a structure similar to a "triangle", the triangle has stability and can improve the structural strength of the cross beam 2. At the same time, the end portion 22 of the cross beam 2 is arranged obliquely, so that the inclined surface can diffuse the force received by the cross beam 2 in different directions when the cross beam 2 is stressed, thereby avoiding damage to the cross beam 2 caused by the concentration of force.

[0051] Please continue to refer to Figure 4 , the included angle between the side of the cross beam 2 away from the bottom of the box 1 and the side of the body portion 23 away from the bottom of the box 1 is α, 130°≤α≤140°. It should be noted that when α is less than 130°, the height of the end portion 22 is too small, and when pouring glue into the battery compartment 13, the glue is easy to penetrate from the top of the end portion 22 of the cross beam 2 into the electrical compartment 14, thereby polluting the electrical components in the electrical compartment 14. When α is greater than 140°, the height of the end portion 22 is too high, which will interfere with the installation of the upper cover. Specifically, in the present embodiment, α can be 130°, 131°, 132°, 133°, 134°, 135°, 136°, 137°, 138°, 139°, 140° or other data not listed.

[0052] In some embodiments, please continue to refer to Figure 2 and Figure 3 , the body portion 23 is provided with a plurality of through holes 21, and the plurality of through holes 21 are configured to pass through the cooling pipe and / or the connection wire harness. Specifically, the plurality of through holes 21 comprise a plurality of electrical through holes 211 and a plurality of water pipe through holes 212, the plurality of electrical through holes 211 are configured to pass through the connection wire harness, and the plurality of water pipe through holes 212 are configured to pass through the cooling pipe. It should be noted that in order to ensure the safety of the battery box 100, the plurality of electrical through holes 211 and the plurality of water pipe through holes 212 are arranged separately, that is, the plurality of electrical through holes 211 are arranged together, and the plurality of water pipe through holes 212 are arranged together. Please continue to refer to Figure 3 , the plurality of electrical through holes 211 are arranged on one side of the plurality of water pipe through holes 212.

[0053] In some embodiments, the battery box 100 further comprises a plurality of sealing pads corresponding to the plurality of through holes 21. In order to avoid the glue in the battery compartment 13 penetrating into the electrical compartment 14 through the plurality of through holes 21, the sealing pads are arranged in the plurality of through holes 21 to achieve the sealing function.

[0054] In some embodiments, the plurality of water pipe through holes 212 are used for the cooling pipe to pass through. It should be noted that the size of the cooling pipe is usually fixed, and therefore the size of the water pipe through hole 212 can be set according to the size of the cooling pipe, so that the cooling pipe is in interference fit with the water pipe through hole 212. In this way, the stability of the connection of the cooling pipe can be ensured, and the glue in the battery compartment 13 can be prevented from penetrating into the electrical compartment 14 from the water pipe through hole 212.

[0055] The connection harness is mainly used to electrically connect the battery in the battery compartment 13 with the electrical components in the electrical compartment 14. The components connected by the connection harness are different, and the size of the connection harness is also different. Therefore, when the electrical through hole 211 is arranged, in order to meet the different connection harnesses, the size of the electrical through hole 211 is arranged to be larger, which can cause the glue in the battery compartment 13 to penetrate into the electrical compartment 14 from the electrical through hole 211. Therefore, after the connection harness passes through the electrical through hole 211, the sealing pad is installed in the electrical through hole 211 to block the electrical through hole 211, thereby preventing the glue in the battery compartment 13 from penetrating into the electrical compartment 14 from the electrical through hole 211.

[0056] In some embodiments, please refer to Figure 4 The second part 32 is formed with a total cavity, and the connecting piece 3 further comprises a plurality of partitions which are arranged in the total cavity to divide the total cavity into a plurality of sub-cavities. In this way, the strength of the second part 32 can be improved, and the plurality of sub-cavities can absorb the impact force. When the cross beam 2 is impacted or shocked, the plurality of sub-cavities can disperse the impact force received by the cross beam 2, so as to avoid the cross beam 2 from being bent and deformed and causing the battery in the battery compartment 13 to be squeezed, thereby improving the safety performance of the battery box 100.

[0057] Further, the first part 31 can be a solid structure or can be provided with a cavity, which can be selected according to actual conditions. When the first part 31 is provided with a cavity, the specific arrangement manner can refer to the second part 32, which will not be described herein.

[0058] The utility model further provides a battery pack, the battery pack includes battery box 100. The specific structure of battery box 100 refers to the above-mentioned embodiment, because the battery pack adopts all the technical solutions of the above-mentioned embodiments, at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described herein.

[0059] In addition, the utility model further provides a kind of electric equipment, the electric equipment includes above-mentioned battery pack.The specific structure of the battery pack refers to above-mentioned embodiment, since the utility model electric equipment has adopted all technical solutions of above-mentioned all embodiments, at least have all beneficial effects brought by the technical solutions of above-mentioned embodiment, here no longer one by one elaboration.

[0060] It can be understood that the electric device includes but is not limited to electric toys, power tools, electric cars, cars, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric plane toys, etc. Spacecraft can include airplanes, rockets, space shuttles and spaceships, etc. Cars can be fuel cars, gas cars and new energy cars.

[0061] The above embodiments of the utility model are described in detail, and the principle and implementation mode of the utility model are described by applying specific examples. The above embodiment is only used to help understand the method and core idea of the utility model. Meanwhile, for those skilled in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as a limitation of the utility model.

Claims

1. A battery box, characterized in that: include: A box body (1), the box body comprising a box body beam (11); A crossbeam (2) is provided in the box body (1) and connected to the box body beam (11) to separate the box body (1) into a battery compartment (13) and an electrical compartment (14); an end portion (22) of the crossbeam (2) is sealedly connected to the box body beam (11).

2. The battery box according to claim 1, characterized in that: The cross beam (2) and the box beam (11) are integrally formed by die-casting or casting.

3. The battery box according to claim 1, characterized in that: Also includes: A connecting member (3), the connecting member (3) being provided on the crossbeam (2), and the end portion (22) of the crossbeam (2) being connected to the box beam (11) via the connecting member (3); A sealing member is abutted between the end portion (22) of the cross beam (2) and the box beam (11) and is used for sealingly connecting the end portion (22) and the box beam (11).

4. The battery box according to claim 3, characterized in that: The connecting member (3) comprises a first portion (31) and two second portions (32), wherein the first portion (31) is connected between the two second portions (32), the first portion (31) is arranged on the crossbeam (2), and the two second portions (32) extend from the end portion (22) of the crossbeam (2) and are connected to the box beam (11).

5. The battery box according to any one of claims 1 to 4, characterized in that: The cross beam (2) includes a main body (23), the main body (23) is arranged between the two end portions (22), the two end portions (22) are connected to the box beam (11), and along the height direction of the box (1), the height of the two end portions (22) is lower than the height of the main body (23).

6. The battery box according to claim 5, characterized in that: In the direction from the main body (23) to the end (22), the height of the end (22) is gradually reduced.

7. The battery box according to claim 6, characterized in that: The angle between the side of the crossbeam (2) facing away from the bottom of the box body and the side of the main body (23) facing away from the bottom of the box body is α, and 130°≤α≤140°.

8. The battery box according to claim 5, characterized in that: The main body (23) is provided with a plurality of through holes (21), and the plurality of through holes (21) are configured to allow cooling pipes and / or connecting wire harnesses to pass through.

9. The battery box according to claim 8, characterized in that: It also includes a plurality of sealing pads, and the plurality of sealing pads are correspondingly arranged in the plurality of via holes (21).

10. A battery pack, characterized in that: Comprising a battery box as described in any one of claims 1-9.

Images