CN217589065U

CN217589065U - Battery pack circuit breaking unit and battery pack

Info

Publication number: CN217589065U
Application number: CN202123174442.2U
Authority: CN
Inventors: 廖虎龙
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-10-14
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a battery package unit and battery package that opens circuit belongs to battery package and accessory technical field, for solving the low scheduling problem design of the current battery package unit production efficiency that opens circuit. The utility model discloses battery package open circuit unit includes: the shell comprises a first mounting cavity and at least one second mounting cavity, and a boss is arranged on the second mounting cavity; and the circuit breaking device is installed in the first installation cavity and/or the second installation cavity through the fixing buckle, and the top surface of the boss abuts against the bottom surface of the circuit breaking device in the second installation cavity. The utility model discloses battery package circuit-breaking unit and battery package use fixed buckle to replace the bolt nut among the prior art to connect, have reduced the use amount of bolt nut, have improved production efficiency, have reduced the holistic weight of battery package circuit-breaking unit, have improved space utilization, compact structure, the overall arrangement is pleasing to the eye, convenient later maintenance; the boss makes circuit breaker device more stable after the installation, has reduced the processing degree of difficulty of casing.

Description

Battery pack circuit breaking unit and battery pack

Technical Field

The utility model relates to a battery package and accessory technical field especially relate to a battery package open circuit unit and include the battery package of this battery package open circuit unit.

Background

A Battery Disconnect Unit (BDU) is a high voltage distribution box for controlling the current flow of the entire device. To achieve this function, the battery pack disconnection unit generally includes a housing, a resistor, and a relay.

In the existing battery pack circuit breaking unit, a nut is embedded on an injection molded shell, and a resistor is fixedly connected to the shell through a bolt. The drawbacks of this structure include: 1. a plurality of nuts are required to be embedded in the shell, so that the production efficiency of the shell is low, and the labor cost is high; 2. the use of a plurality of nuts and bolts increases the processing cost and the product weight; 3. the position of the embedded nut needs to be reserved on the shell, so that the space utilization rate is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery package unit that opens circuit that production efficiency is high.

Another object of the utility model is to provide a battery package that production efficiency is high.

To achieve the purpose, on one hand, the utility model adopts the following technical scheme:

a battery pack disconnect unit, comprising: the shell comprises a first mounting cavity and at least one second mounting cavity, and a boss is arranged on the second mounting cavity; and the circuit breaking device is installed in the first installation cavity and/or the second installation cavity through a fixing buckle, and the top surface of the boss abuts against the bottom surface of the circuit breaking device in the second installation cavity.

Particularly, the circuit breaking device in the first mounting cavity is a resistor, and a resistor fixing buckle capable of elastically deforming is arranged on the side wall of the first mounting cavity; when the resistor is positioned in the first mounting cavity, the resistor fixing buckle can be clamped and fixed with the resistor.

Especially, be provided with four altogether on the lateral wall of first installation cavity the fixed buckle of resistance, work as resistance is located when in the first installation cavity, four the fixed buckle of resistance is fixed from relative both sides joint respectively resistance.

Particularly, the circuit breaking devices arranged in the second mounting cavity are a main positive relay, a charging relay, a main negative relay and a pre-charging relay, and the main negative relay, the charging relay, the main positive relay and/or the pre-charging relay are detachably clamped on the shell through relay buckles respectively.

In particular, a disassembly through hole is formed in the bottom surface of the shell, and the disassembly through hole is aligned with the main negative relay, the charging relay or the main positive relay respectively.

Particularly, the battery pack circuit breaking unit further comprises a lower cover, the lower cover and the shell are enclosed to form a lower accommodating cavity, a flexible circuit board is arranged in the lower accommodating cavity, and the flexible circuit board is fixed on the lower cover through hot-melt plastic.

Particularly, the lower cover is provided with at least two mounting limit blocks, and all the mounting limit blocks are asymmetrically arranged relative to the center of the lower cover.

Particularly, the battery pack circuit breaking unit further comprises a copper bar, and the collection points on the copper bar are oppositely inserted into the flexible circuit board through riveting insertion sheets.

Particularly, a dismounting gap is formed in the side wall of the shell, and an installation guide groove is formed in the edge of the dismounting gap; the battery pack breaking unit further comprises a blocking plate which is arranged in the installation guide groove and can slide in the installation guide groove.

On the one hand, the utility model discloses a following technical scheme:

a battery pack comprises the battery pack circuit breaking unit.

The circuit breaker of the battery pack circuit breaking unit is arranged in the two installation cavities through the fixed buckle, replaces a bolt and a nut in the prior art to be connected, reduces the using amount of the bolt and the nut, improves the production efficiency, reduces the whole weight of the battery pack circuit breaking unit, improves the space utilization rate, and has compact structure, beautiful layout and convenient later maintenance; be provided with the boss on the second installation cavity, it is more stable after the device that opens circuit installs, reduced the processing degree of difficulty of casing.

The utility model discloses the structure of battery package includes foretell battery package open circuit unit, light in weight, and production efficiency is high, and compact structure space utilization is high.

Drawings

Fig. 1 is an exploded view of a circuit breaking unit of a battery pack according to an embodiment of the present invention;

fig. 2 is a top view of the internal structure of a battery pack disconnection unit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a housing according to an embodiment of the present invention;

fig. 4 is a top view of the lower cover according to the embodiment of the present invention.

In the figure:

1. a first mounting cavity; 2. a second mounting cavity; 3. a resistance; 4. a flexible circuit board; 5. copper bars; 6. a baffle plate; 7. hall; 8. a fuse; 11. a housing; 12. an upper cover; 13. a lower cover; 31. a main positive relay; 32. a charging relay; 33. a main negative relay; 34. a pre-charging relay; 111. a resistor fixing buckle; 112. a boss; 113. disassembling the through hole; 114. installing a guide groove; 131. and installing a limiting block.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The present embodiment provides a battery pack disconnection unit and a battery pack including the same. As shown in fig. 1 to 3, the battery pack disconnection unit includes a housing 11 and an upper cover 12, wherein the housing 11 and the upper cover 12 are fixedly connected by a snap fastener and form an upper receiving cavity after being fastened. A first mounting cavity 1 and at least one second mounting cavity 2 are formed on the shell 11, and a boss 112 is arranged on the second mounting cavity 2; the circuit breaker is mounted in the first and/or second housing 1, 2 by means of a fixed snap, the top surface of the boss 112 abutting against the bottom surface of the circuit breaker located in the second housing 2. The contact area between the shell 11 and each circuit breaker can be reduced by arranging the boss 112, the stability of installation of each circuit breaker can be ensured as long as the flatness of the top surface of the boss 112 can be ensured, the interference between the circuit breaker and a buckle on the shell 11 is avoided, the processing difficulty is reduced, and the processing efficiency is improved.

The fixing buckle is used for replacing a bolt and a nut in the prior art for connection, so that the using amount of the bolt and the nut is reduced, the production efficiency is improved, the overall weight of the battery pack circuit breaking unit is reduced, the space utilization rate is improved, the structure is compact, the layout is attractive, and the later maintenance is facilitated; be provided with the boss on the second installation cavity, it is more stable after the device that opens circuit installs, reduced the processing degree of difficulty of casing.

The circuit breaking device in the first installation cavity 1 is a resistor 3, and a resistor fixing buckle 111 capable of elastically deforming is arranged on the side wall of the first installation cavity 1. When the resistor 3 is located in the first mounting cavity 1, the resistor fixing buckle 111 can be clamped to fix the resistor 3.

The resistor 3 is fixed by the resistor fixing buckle 111, a connecting structure using bolts and nuts in the prior art is replaced, the using amount of the bolts and nuts is reduced, the production efficiency is improved, the whole weight of the battery pack circuit-breaking unit is reduced, and the space utilization rate is improved.

The specific installation mode between the resistor fixing buckle 111 and the resistor 3 is not limited, preferably, four resistor fixing buckles 111 are arranged on the side wall of the first installation cavity 1 in total, and when the resistor 3 is located in the first installation cavity 1, the four resistor fixing buckles 111 clamp and fix the resistor 3 from two opposite sides respectively. During the installation, with the vertical resistance installation position of pressing into of resistance 3, four fixed buckles 111 of resistance reset after elastic deformation to catch on the top surface edge of resistance 3, the realization is fixed to the joint of resistance 3.

On the basis of the structure, the circuit breaking device arranged in the second mounting cavity 2 is a main positive relay 31, a charging relay 32, a main negative relay 33 and a pre-charging relay 34, the main positive relay 31, the charging relay 32, the main negative relay 33 and/or the pre-charging relay 34 are detachably clamped on the shell 11 through relay buckles (not shown) respectively, and the circuit breaking device is convenient to mount and reduces weight. The buckle preferably sets up respectively in main positive relay 31, charging relay 32, main negative relay 33 and the both sides limit department of pre-charging relay 34, and it is more firm to connect, and the dismouting is more convenient, and the overall arrangement is more reasonable.

On the basis of above-mentioned structure, battery package open Circuit unit still includes and passes through buckle fixed connection's lower cover 13 with casing 11, and lower cover 13 encloses with casing 11 and closes the chamber that holds down that forms, holds down to be provided with Flexible Circuit board 4 (Flexible Printed Circuit is called FPC for short) in the chamber, and Flexible Circuit board 4 passes through the hot melt plastic and fixes on lower cover 13. The flexible circuit board 4 is used for replacing a wire harness in the prior art, the assembly is simple, the production efficiency is high, the cost is reduced, and the later maintenance is facilitated.

On the basis of above-mentioned structure, the battery package unit that opens circuit still includes

copper bar

5, and 5 riveting inserted sheets of copper bar, collection point on the copper bar 5 are to inserting through inserted sheet and flexible circuit board 4, realize copper bar 5 and flexible circuit board 4's electrical connection, convenient assembly and dismantlement.

The connection mode between the copper bar 5 and the shell 11 is not limited, and preferably adopts a bolt fixing connection mode, so that the overall structure is more stable.

Considering that the connecting pieces need to be installed from the side surface in part of the structure (such as the copper bar 5 and the main and negative relays 33) in the battery pack breaking unit, the side wall of the shell 11 is provided with a dismounting notch, and the connecting pieces can stretch into the dismounting notch and be installed in place. In order to ensure the use safety of the whole battery pack circuit breaking unit, the baffle 6 is required to be used for thoroughly blocking the dismounting notch after the connecting piece is installed, and the baffle 6 has the function of insulation and separation. The edge of dismouting breach is preferred to be provided with installation guide slot 114, and baffle 6 can slide in installation guide slot 114, and the dismouting is more convenient, has improved machining efficiency.

On the basis of the above structure, the battery pack disconnection unit further includes a hall 7 and a fuse 8. The Hall 7 and the fuse 8 are respectively matched and fixed with embedded nuts on the shell 11 through bolts. The current carrying capacity of the circuit breaking unit of the battery pack is 150A/250A/300A, and the battery pack has the functions of current collection, voltage collection, short-circuit protection and pre-charging.

A removal through hole 113 is provided on the bottom surface of the housing 11. The shape and the size of the dismounting through hole 113 are not specifically limited, the dismounting through hole 113 is preferably a round hole with the diameter of 8, the dismounting through hole 113 is respectively aligned with the main positive relay 31, the charging relay 32 or the main negative relay 33, the dismounting relay can be jacked on the bottom surface of the relay only by using the thin rod to penetrate through the dismounting through hole 113, the relay can be jacked up by pushing the thin rod with force, and the dismounting relay is more convenient.

The lower cover 13 is generally rectangular, and it is difficult to determine which side is the upper side and which side is the lower side from the outer shape alone, and it cannot be attached to the housing 11 once it is turned upside down. In order to prevent the fool and improve the installation efficiency, as shown in fig. 4, at least two installation limiting blocks 131 are arranged on the lower cover 13, and all the installation limiting blocks 131 are asymmetrically arranged relative to the center of the lower cover 13. The upper and lower edges of the lower cover 13 can be quickly judged according to the positions of the two mounting limit blocks 131, the lower cover 13 cannot be turned upside down or dislocated with the shell 11, the positioning is accurate, and the mounting efficiency is high.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A battery pack disconnect unit, comprising:

the shell (11) comprises a first mounting cavity (1) and at least one second mounting cavity (2), and a boss (112) is arranged on the second mounting cavity (2); and the number of the first and second groups,

the circuit breaker is installed in the first installation cavity (1) and/or the second installation cavity (2) through a fixed buckle, and the top surface of the boss (112) abuts against the bottom surface of the circuit breaker located in the second installation cavity (2).

2. The battery pack disconnection unit according to claim 1, wherein the disconnection means in the first mounting cavity (1) is a resistor (3), and a resiliently deformable resistor fixing catch (111) is provided on a side wall of the first mounting cavity (1); when resistance (3) are located in first installation cavity (1), resistance fixing buckle (111) can the joint be fixed resistance (3).

3. The battery pack disconnection unit of claim 2, wherein a total of four resistor fixing clips (111) are disposed on a side wall of the first mounting cavity (1), and when the resistor (3) is located in the first mounting cavity (1), the four resistor fixing clips (111) respectively fix the resistor (3) from two opposite sides in a clamping manner.

4. The battery pack disconnection unit according to claim 1, wherein the disconnection means provided in the second mounting chamber (2) are a main positive relay (31), a charging relay (32), a main negative relay (33), and a pre-charging relay (34), and the main positive relay (31), the charging relay (32), the main negative relay (33), and/or the pre-charging relay (34) are detachably snapped onto the housing (11) by relay snaps, respectively.

5. The battery pack disconnection unit according to claim 4, wherein a removal through hole (113) is provided on a bottom surface of the housing (11), the removal through hole (113) being aligned with the main positive relay (31), the charging relay (32), or the main negative relay (33), respectively.

6. The battery pack disconnection unit according to any one of claims 1 to 5, further comprising a lower cover (13), wherein the lower cover (13) and the housing (11) enclose a lower accommodating cavity, a flexible circuit board (4) is disposed in the lower accommodating cavity, and the flexible circuit board (4) is fixed on the lower cover (13) through hot-melt plastic.

7. The battery pack disconnection unit according to claim 6, wherein the lower cover (13) is provided with at least two mounting stoppers (131), and all of the mounting stoppers (131) are asymmetrically arranged with respect to the center of the lower cover (13).

8. The battery pack circuit-breaking unit according to claim 6, further comprising a copper bar (5), wherein the collection point on the copper bar (5) is inserted into the flexible circuit board (4) by a riveting insertion sheet.

9. The battery pack circuit-breaking unit according to any one of claims 1 to 5, wherein a dismounting notch is formed on the side wall of the housing (11), and an installation guide groove (114) is arranged at the edge of the dismounting notch; the battery pack disconnection unit further comprises a baffle (6), wherein the baffle (6) is arranged in the installation guide groove (114) and can slide in the installation guide groove (114).

10. A battery pack comprising the battery pack disconnection unit according to any one of claims 1 to 9.