New energy battery pack high-voltage connecting bar

Abstract

The utility model discloses a high-voltage connecting bar of a new energy battery pack. The high-voltage connecting bar comprises a shell; the positive electrode connecting bar is mounted in the shell; the positive electrode connecting bar is connected with the module positive electrode and the insulator; the negative electrode connecting bar is mounted in the shell; the negative electrode connecting bar is connected with the shunt and the negative electrode; the copper-aluminum composite busbar is arranged in the shell; the copper-aluminum composite busbar comprises a middle section and an end section, the middle section is an aluminum bar, the end section is a copper bar, the middle section and the end section are welded, and the copper-aluminum composite busbar is light in weight, low in cost and small in contact internal resistance value.

Description

Technical Field

[0001] The utility model belongs to the technical field of power batteries, and particularly relates to a high-voltage connection row of a new energy battery pack. Background Art

[0002] In the process of implementing the present utility model, the inventor found that the prior art has at least the following problems:

[0003] At present, the new energy industry is developing rapidly. Under the guidance and support of policies, China has become the world's largest new energy vehicle market. The safety of electric vehicles is the most important requirement that everyone is concerned about. Among them, the power battery pack is the most concerned safety component on new energy vehicles. The busbar plays a role in connection and current transmission inside the power battery pack and is also one of the key components that most affect safety. At present, most of the busbars inside the power battery packs on the market are copper bars or aluminum bars. The copper bars have high weight and cost, and the aluminum bars have poor electrical conductivity and large contact internal resistance values.

[0004] CN202322503107 - Connection Row, Battery Pack and Vehicle discloses a connection row, a battery pack and a vehicle. The connection row includes a body, the body includes a first connection part, a buffer part and a second connection part. The first connection part and the second connection part are arranged at intervals along a first direction. The buffer part is located between the first connection part and the second connection part, and the buffer part is respectively connected to the first connection part and the second connection part; the buffer part includes a plurality of bending sections, and the bending sections are arranged and connected along the first direction, and it also cannot solve the above technical problems. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to provide a high-voltage connection row for a new energy battery pack, which is a busbar with a relatively light weight, a relatively low cost and a relatively small contact internal resistance value.

[0006] In order to solve the above technical problems, the technical solution adopted by the present utility model is: a high-voltage connection row for a new energy battery pack, having:

[0007] A housing;

[0008] A positive connection row, installed inside the housing; the positive connection row connects the module positive electrode and the insulator;

[0009] A negative connection row, installed inside the housing; the negative connection row connects the shunt and the negative electrode;

[0010] A copper-aluminum composite busbar, installed inside the housing; the copper-aluminum composite busbar includes a middle section and end sections. The middle section is an aluminum bar, the end sections are copper bars, and the middle section and the end sections are welded.

[0011] It also has a Z-shaped row, and the end section of the copper-aluminum composite busbar is connected to the Z-shaped row, and the Z-shaped row is connected to the relay and the tail fast charge and discharge interface.

[0012] It also has a U-shaped row, and the U-shaped row is connected to the insulator and the relay.

[0013] It also has a module connection small row, and the module connection small row is connected to the battery module.

[0014] It also has a module connection middle row, and the module connection middle row is connected to the battery module.

[0015] It also has a module connection long row, and the module connection long row is connected to the battery module.

[0016] One of the technical solutions in the above technical solutions has the following advantages or beneficial effects: it is a busbar with a lighter weight, lower cost, and smaller contact internal resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the high-voltage connection row of the new energy battery pack provided in the embodiment of the present invention;

[0018] Figure 2 For Figure 1 the schematic structural diagram of the high-voltage connection row of the new energy battery pack;

[0019] The markings in the above figures are all: 1, positive connection row; 2, module connection small row; 3, U-shaped row; 4, Z-shaped row; 5, negative connection row; 6, housing; 7, copper-aluminum composite busbar; 8, module connection middle row; 9, module connection long row. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] See Figures 1-2 , a high-voltage connection row of a new energy battery pack, having:

[0022] Housing 6; positive connection busbar 1, installed inside housing 6; positive connection busbar 1 connects the module positive electrode and the insulator; negative connection busbar 5, installed inside housing 6; negative connection busbar 5 connects the shunt and the negative electrode; copper-aluminum composite busbar 7, installed inside housing 6; copper-aluminum composite busbar 7 includes a middle section and an end section, the middle section is an aluminum bar, the end section is a copper bar, and the middle section and the end section are welded. Both copper and aluminum have good electrical conductivity, and the density of aluminum is 1 / 3 of that of copper. Forming a connecting piece with aluminum and copper can reduce costs, reduce the mass of mechanical components, and give play to their respective advantages. However, the surface of aluminum is extremely easy to oxidize, and the formed oxide film is very firm and has a large resistance. Mechanical connection is unreliable. Therefore, a welding method is used to achieve the connection to improve the comprehensive performance of copper and aluminum. For the copper-aluminum composite busbar, the connection part uses copper material to reduce the contact internal resistance, and the middle section uses aluminum material, reducing the overall cost and weight.

[0023] It also has a Z-shaped busbar 4. The end section of the copper-aluminum composite busbar 7 is connected to the Z-shaped busbar 4, and the Z-shaped busbar 4 is connected to the relay and the tail fast charge and discharge interface. It also has a U-shaped busbar 3, and the U-shaped busbar 3 connects the insulator and the relay, playing the role of circuit connection.

[0024] It also has a module connection small busbar 2, and the module connection small busbar 2 connects the battery module. It also has a module connection middle busbar 8, and the module connection middle busbar 8 connects the battery module. It also has a module connection long busbar 9, and the module connection long busbar 9 connects the battery module, serving the purpose of connecting battery cells.

[0025] Advantages:

[0026] 1. Superior electrical conductivity: Copper is a good electrical conductive material, and aluminum has good thermal conductivity. The copper-aluminum composite busbar combines the advantages of the two metals, has good electrical conductivity, can effectively transmit electric energy, and reduce transmission losses.

[0027] 2. Lightweight: Compared with pure copper busbars, the copper-aluminum composite busbar has a lighter weight, making it more suitable for some occasions where light weight is required, such as the aerospace field, etc.

[0028] 3. Cost saving: Aluminum is a relatively inexpensive metal. Compared with pure copper busbars, the production cost of the copper-aluminum composite busbar is lower, which can save material costs, reduce production costs, and thus reduce the selling price of products.

[0029] 4. Strong antioxidant performance: The copper layer of the copper-aluminum composite busbar is in contact with the air, while the aluminum layer is wrapped inside, effectively reducing the oxidation of aluminum, thereby improving the antioxidant performance of the composite busbar and extending the service life.

[0030] 5. Good plasticity: The copper layer and the aluminum layer of the copper-aluminum composite busbar are firmly connected through a composite process, have good plasticity, and can be bent, cut, etc. according to needs, which is convenient for installation and use.

[0031] 6. Environmental protection: Modern production processes are adopted in the production of copper-aluminum composite busbars, reducing environmental pollution and meeting environmental protection requirements.

[0032] In summary, copper-aluminum composite busbars have many advantages such as excellent electrical conductivity, lightweight, cost savings, strong oxidation resistance, good plasticity, and environmental protection. Therefore, they have been widely used in the electrical field and other industries.

[0033] After adopting the above structure, it is a busbar with a lighter weight, lower cost, and smaller contact internal resistance.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "center", "both ends", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0035] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A new energy battery pack high voltage connection bar, characterized in that: have: case; A positive electrode connection bar is installed in the housing; the positive electrode connection bar connects the module positive electrode and the insulator; A negative electrode connection bar is installed in the housing; the negative electrode connection bar connects the shunt and the negative electrode; A copper-aluminum composite busbar is installed in the shell; the copper-aluminum composite busbar comprises a middle section and an end section, the middle section is an aluminum busbar, the end section is a copper busbar, and the middle section and the end section are welded.

2. The new energy battery pack high voltage connection bar according to claim 1, characterized in that: It also has a Z-shaped busbar, the end section of the copper-aluminum composite busbar is connected to the Z-shaped busbar, and the Z-shaped busbar is connected to the relay and the tail fast charging and discharging interface.

3. The new energy battery pack high voltage connection bar as claimed in claim 2, characterized in that: There is also a U-shaped bar connecting the insulators and the relays.

4. The new energy battery pack high voltage connection bar as claimed in claim 3, characterized in that: It also has a module connection row, and the module connection row is connected to the battery module.

5. The new energy battery pack high voltage connection bar as claimed in claim 4, characterized in that: It also has a module connection middle row, and the module connection middle row is connected to the battery module.

6. The new energy battery pack high voltage connection bar as claimed in claim 5, characterized in that: It also has a long row of module connections, and the long row of module connections connects the battery modules.

Images