Integrated busbar with cell valve opening detection function

Abstract

The utility model relates to the technical field of batteries, and discloses an integrated busbar with a battery cell valve opening detection function, which comprises a flexible circuit board arranged on a battery cell, an explosion-proof valve is arranged on the battery cell, a fusible metal wire is arranged on the flexible circuit board at the position of the explosion-proof valve, and the fusible metal wire is connected with a battery management system. The integrated busbar with the battery cell valve opening detection function can identify abnormity in the battery cell valve opening stage and send out signals in advance, thereby reserving more reaction time for safety protection.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to integrated busbar with battery cell valve opening detection function. BACKGROUND

[0002] Most of the existing batteries adopt flexible circuit board integrated busbar, which has the functions of voltage and temperature collection, but cannot determine and detect the valve opening state of the battery cell. When the battery cell valve opens, it cannot accurately locate the valve opening battery cell, and can only detect hydrogen and carbon monoxide through the detector in the battery pack to find out which battery pack has the battery cell valve opening, but the specific valve opening position of the battery cell cannot be determined.

[0003] In addition, not all battery cells have temperature detection, and the out-of-control state of the battery cell cannot be found.

[0004] Generally speaking, there is a certain time difference between the valve opening and the thermal runaway of the battery cell, about 20 minutes. If the abnormal valve opening of the battery cell can be detected during this period, appropriate measures can be taken in advance to avoid thermal runaway. INVENTION CONTENTS

[0005] The utility model aims at the above technical deficiency, provides a kind of integrated busbar with battery cell valve opening detection function, can identify exception in battery cell valve opening stage, and signal is sent in advance, reserve more reaction time for safety protection.

[0006] To achieve the above object, the integrated busbar with battery cell valve opening detection function designed by the utility model comprises a flexible circuit board arranged on a battery cell, an explosion-proof valve arranged on the battery cell, a fusible metal wire arranged on the flexible circuit board at the position of the explosion-proof valve, and the fusible metal wire is connected with a battery management system.

[0007] Preferably, the fusible metal wire is fused by the high-pressure and high-temperature gas sprayed by the explosion-proof valve of the battery cell when the battery cell valve opens.

[0008] Preferably, a fusible metal wire is arranged on the flexible circuit board at the position of each explosion-proof valve, and the fusible metal wires are connected in parallel.

[0009] Preferably, an explosion-proof valve avoiding hole is arranged on the flexible circuit board at the position of the explosion-proof valve, and the fusible metal wire is arranged on the explosion-proof valve avoiding hole.

[0010] Preferably, the flexible circuit board is etched at the position of the explosion-proof valve to form the fusible metal wire.

[0011] Preferably, the line width of the fusible metal wire is 0.2-0.25mm.

[0012] Preferably, the length of the fusible metal wire is 4-10mm.

[0013] Preferably, the fusible metal wire is spiral.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The abnormality can be identified in the valve opening stage of the battery cell, the signal is sent in advance, more reaction time is reserved for safety protection, and the safety of the system is improved.

[0016] 2. The position of the valve opening battery cell can be accurately identified. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model discloses an integrated busbar with battery cell valve opening detection function structure schematic view.

[0018] Figure 2 The utility model discloses a flexible circuit board structure schematic view. Figure 1 The utility model discloses a flexible circuit board structure schematic view.

[0019] Mark explanation:

[0020] 1-flexible circuit board, 2-fusible metal wire, 3-explosion-proof valve avoiding hole. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, and obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the range of protection of the utility model.

[0022] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it can not be understood as the limitation of the utility model. In addition, the terms "first", "second", "third" are only for the description purpose, and can not be understood as indicating or implying relative importance.

[0023] In the description of the utility model, it is necessary to explain, unless another explicit provision and limitation, the term "installation", "link", "connection" should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication.For the ordinary skill in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0024] Embodiment 1

[0025] As Figure 1 And Figure 2 As shown in a kind of integrated busbar with battery core valve opening detection function, including being arranged on flexible circuit board 1 of battery core, explosion-proof valve is arranged on battery core, and fusible metal wire 2 is arranged on flexible circuit board 1 in the position of explosion-proof valve, fusible metal wire 2 is connected with battery management system.When fusible metal wire 2 in battery core valve opening, high-pressure high-temperature gas spouted by explosion-proof valve of battery core is fused.

[0026] Embodiment 2

[0027] A kind of integrated busbar with battery core valve opening detection function, including being arranged on flexible circuit board 1 of battery core, explosion-proof valve is arranged on battery core, and fusible metal wire 2 is arranged on flexible circuit board 1 in the position of each explosion-proof valve, fusible metal wire 2 is connected with battery management system in parallel.When fusible metal wire 2 in battery core valve opening, high-pressure high-temperature gas spouted by explosion-proof valve of battery core is fused.

[0028] Embodiment 3

[0029] A kind of integrated busbar with battery core valve opening detection function, including being arranged on flexible circuit board 1 of battery core, explosion-proof valve is arranged on battery core, and fusible metal wire 2 is arranged on flexible circuit board 1 in the position of each explosion-proof valve, fusible metal wire 2 is connected with battery management system in parallel.When fusible metal wire 2 in battery core valve opening, high-pressure high-temperature gas spouted by explosion-proof valve of battery core is fused.

[0030] Wherein, explosion-proof valve avoidance hole 3 is arranged on flexible circuit board 1 in the position of explosion-proof valve, and fusible metal wire 2 is arranged on explosion-proof valve avoidance hole 3.

[0031] Embodiment 4

[0032] An integrated busbar with battery cell valve opening detection function, comprising a flexible circuit board 1 arranged on a battery cell, wherein the battery cell is provided with an explosion-proof valve, and the flexible circuit board 1 is provided with a fusible metal wire 2 at the position of each explosion-proof valve, the fusible metal wires 2 are connected in parallel, and the fusible metal wires 2 are connected with a battery management system.

[0033] In the above embodiment, the flexible circuit board 1 is etched at the position of the explosion-proof valve to form the fusible metal wire 2, and the specific etching method is as follows: under certain conditions, the etching liquid is sprayed onto the surface of the copper foil, reacts with the area without protective agent, and reacts the unnecessary copper, and the processing precision can reach 0.01 mm.

[0034] In the above embodiment, the fusible metal wire 2 is a copper wire, the line width is 0.2-0.25 mm, and the line length is 4-10 mm, and the fusible metal wire 2 can also be spiral-shaped.

[0035] In the above embodiment, when one battery cell opens the valve, high-pressure and high-temperature gas is sprayed out, so that the fusible metal wire 2 at the corresponding position is fused, at this time, the battery management system can obtain the serial number of the fusible metal wire 2 that is fused, and further know the position of the battery cell that opens the valve, and the battery cell is processed before triggering thermal runaway.

[0036] The integrated busbar with battery cell valve opening detection function can identify the abnormality in the battery cell valve opening stage, sends the signal in advance, reserves more reaction time for safety protection, improves the safety of the system, and accurately identifies the position of the battery cell that opens the valve.

[0037] Here, it should be noted that the description of the above technical solutions is exemplary, and the present specification can be embodied in different forms, and should not be interpreted as being limited to the technical solutions described herein. On the contrary, providing these descriptions will make the present disclosure complete and complete, and will fully convey the scope disclosed in the present specification to those skilled in the art. In addition, the technical solutions of the present application are only limited by the scope of the claims.

[0038] The shapes, sizes, ratios, angles and numbers used to describe the aspects disclosed in the specification and claims are only examples, and therefore the specification and claims are not limited to the shown details. In the following description, when it is determined that the detailed description of the related known functions or configurations is unnecessary to obscure the focus of the specification and claims, the detailed description will be omitted.

[0039] In the case of using "including", "having" and "containing" described in the present specification, unless otherwise used, another part or other parts can also be present, and the term used can be singular but can also represent plural form.

[0040] It should be noted that although the terms "first", "second", "top", "bottom", "one side", "the other side", "one end", "the other end" and the like can appear and be used in the present description to describe various different components, these components and parts should not be limited by these terms. These terms are only used to distinguish one component and part from another component and part. For example, without departing from the scope of the present description, a first part can be referred to as a second part, and similarly, a second part can be referred to as a first part, and parts of the top and bottom can be reversed or switched with each other in certain cases; parts of one end and the other end can be the same or different from each other.

[0041] When describing positional relationships, for example, when the positional order is described as "on", "above", "below" and "next", unless the words or terms such as "just" or "directly" are used, in addition, it can include the case of not contacting or contacting between them. If it is mentioned that the first element is located "on" the second element, it does not mean that the first element must be located above the second element in the figure. The upper and lower parts of the components will change according to the change of the angle of observation and orientation. Therefore, in the drawings or in the actual structure, if the case where the first element is located "on" the second element is involved, it can include the case where the first element is located "below" the second element and the case where the first element is located "above" the second element. When describing the time relationship, unless "just" or "directly" is used, when "after", "subsequent", "subsequently" and "before" are described, the case of not continuous between steps can be included. The features of various embodiments of the present application can be partially or entirely combined or spliced with each other, and can be executed in various different configurations as can be fully understood by those skilled in the art. Embodiments of the present application can be executed independently of each other, or can be executed together in a mutually dependent relationship.

[0042] Finally, it should be noted that the above embodiments are only representative examples of the present application. Obviously, the present application is not limited to the above embodiments, but can have many variations. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments shall be considered to fall within the scope of protection of the present application.

Claims

1. An integrated busbar with a cell open valve detection function, comprising a flexible circuit board (1) provided on a cell, characterized in that: An explosion-proof valve is arranged on the battery cell, a fusible metal wire (2) is arranged on the flexible circuit board (1) at the position of the explosion-proof valve, and the fusible metal wire (2) is connected with the battery management system.

2. The integrated busbar with the battery cell open valve detection function according to claim 1, characterized in that: The fusible metal wire (2) is fused by the high-pressure and high-temperature gas sprayed by the explosion-proof valve of the battery cell when the valve of the battery cell is opened.

3. The integrated busbar with the battery cell open valve detection function according to claim 1, wherein: A fusible metal wire (2) is arranged on the flexible circuit board (1) at the position of each explosion-proof valve, and the fusible metal wires (2) are connected in parallel.

4. The integrated busbar with the battery cell open valve detection function according to claim 1, wherein: An explosion-proof valve avoiding hole (3) is arranged on the flexible circuit board (1) at the position of the explosion-proof valve, and the fusible metal wire (2) is arranged on the explosion-proof valve avoiding hole (3).

5. The integrated busbar with the battery cell open valve detection function according to claim 1, wherein: The flexible circuit board (1) is etched at the position of the explosion-proof valve to form the fusible metal wire (2).

6. The integrated busbar with the battery cell open valve detection function according to claim 1, wherein: The line width of the fusible metal wire (2) is 0.2-0.25 mm.

7. The integrated busbar with the battery cell open valve detection function according to claim 1, wherein: The line length of the fusible metal wire (2) is 4-10 mm.

8. The integrated busbar with the battery cell open valve detection function according to claim 1, wherein: The fusible metal wire (2) is in a spiral shape.

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