Copper bar structure for preventing short-circuit ignition of high-voltage copper bar of battery pack and battery pack

Abstract

According to the copper bar structure for preventing the battery pack high-voltage copper bar from short circuit and sparking and the battery pack, in the copper bar structure, a PVC insulating layer is arranged on a copper bar conductor, and a high-temperature-resistant insulating layer is arranged between the PVC insulating layer and the copper bar conductor and / or wraps the outer surface of the PVC insulating layer. The copper bar structure has better high temperature resistance and heat insulation performance, and lap joint of the copper bars and the box body is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field especially, relates to a copper bar structure and battery pack of preventing battery pack high voltage copper bar short circuit. BACKGROUND

[0002] In prior art, in order to prevent the short circuit of high voltage copper bar of battery pack and our box, we usually cover a layer of insulating layer to the high voltage copper bar of battery pack to prevent the short circuit of copper bar and box, and the insulating layer of high voltage copper bar of battery pack is generally PVC material, and its melting point temperature is 180 DEG C-200 DEG C.When thermal runaway occurs in single battery or battery module, the high temperature solid (isolation film, positive and negative pole piece), high temperature liquid (electrolyte) and high temperature gas (electrochemical reactant) generated by the explosion-proof valve of single battery cell are directly sprayed into the inside of battery pack, and then quickly diffuse to the inside of the whole battery pack, and the temperature of the thermal runaway battery cell or module also reaches (800 DEG C-1000 DEG C) because of thermal runaway.The insulating layer of high voltage copper bar close to the thermal runaway battery cell or module will melt due to high temperature, thereby causing the insulating failure of the insulating layer, and the copper bar and the box are short-circuited.Because the high temperature generated by short circuit can aggravate the heat spread of battery pack, and further cause greater harm to the whole vehicle and personnel.In order to prevent the short circuit of copper bar, a certain gap is generally designed between the copper bar and the box to prevent short circuit.However, the high temperature solid (such as positive and negative pole piece) generated by thermal runaway can drift to any position of the box at will, and the copper bar and the box still cannot be completely avoided.

[0003] The above information disclosed in the background section is only used to enhance the understanding of the background of the utility model, and therefore can contain information that is not prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a copper bar structure and battery pack for preventing the short circuit of high voltage copper bar of battery pack, which has better high temperature resistance and heat insulation performance, and avoids the lapping of copper bar and box.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] The copper bar structure for preventing the short circuit of high voltage copper bar of battery pack comprises,

[0007] Copper bar conductor,

[0008] PVC insulating layer, which is arranged on the copper bar conductor,

[0009] High temperature resistant insulating layer, which is arranged between the PVC insulating layer and the copper bar conductor, and / or covers the outer surface of the PVC insulating layer.

[0010] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein through holes are arranged at both ends of the copper bar conductor.

[0011] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the through holes are circular holes.

[0012] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the PVC insulation layer is wrapped around the copper bar conductor.

[0013] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the high-temperature-resistant insulation layer is wrapped around the copper bar conductor, the PVC insulation layer is wrapped around the high-temperature-resistant insulation layer, and the copper bar conductor, the high-temperature-resistant insulation layer and the PVC insulation layer form a concentric layer structure in sequence.

[0014] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the high-temperature-resistant insulation layer is a mica paper layer arranged between the PVC insulation layer and the copper bar conductor.

[0015] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the mica paper layer is a single-layer mica paper.

[0016] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the high-temperature-resistant insulation layer is a mica tape wrapped around the outer surface of the PVC insulation layer.

[0017] The copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack, wherein the copper bar joint is a symmetrical structure.

[0018] A battery pack comprises,

[0019] a box,

[0020] a battery module arranged in the box,

[0021] a plurality of the copper bar structures arranged around the battery module and connected to the battery module by bolts.

[0022] In the above technical solution, the copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack and the battery pack have the following beneficial effects: the copper bar structure for preventing high-voltage copper bar short circuit sparking of a battery pack wraps the high-voltage copper bar with a high-temperature-resistant insulation material, so that the insulation of the copper bar still exists when the battery pack is in thermal runaway, the copper bar and the box are prevented from being overlapped and short-circuited, the battery pack is prevented from being in more serious thermal runaway, and the safety of the whole vehicle and the passenger compartment is further ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings.

[0024] Figure 1 The structure diagram of the battery pack of the present application including the copper bar structure for preventing the short circuit of the high-voltage copper bar of the battery pack.

[0025] Figure 2 The structure diagram of the copper bar structure for preventing the short circuit of the high-voltage copper bar of the battery pack of the present application.

[0026] Figure 3 The front view schematic diagram of the copper bar structure for preventing the short circuit of the high-voltage copper bar of the battery pack of the present application.

[0027] Figure 4 The cross-sectional structure schematic diagram of A_A of the copper bar structure. Figure 3

[0028] Figure 5 The front view schematic diagram of the copper bar structure of another embodiment of the present application.

[0029] Figure 6 The cross-sectional structure schematic diagram of B_B of the copper bar structure. Figure 5

[0030] The marks in the drawings are: copper bar conductor 1, PVC insulation layer 2, high-temperature-resistant insulation layer 3, battery module 4, copper bar structure 5. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. ​​

[0033] It should be noted that like reference numerals and letters refer to like items throughout the several views, and once an item is defined in one view, it is not necessary to further define and explain it in the subsequent views.

[0034] In order to make the technical scheme of the utility model better understood by the person skilled in the art, the utility model will be further described in detail below in conjunction with the drawings.

[0035] As shown in the drawings, Figures 1-6 In one embodiment, the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack comprises,

[0036] A copper bar conductor 1,

[0037] A PVC insulation layer 2 is arranged on the copper bar conductor 1,

[0038] A high-temperature-resistant insulation layer 3 is arranged between the PVC insulation layer 2 and the copper bar conductor 1 and / or covers the outer surface of the PVC insulation layer 2.

[0039] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, through holes are arranged at both ends of the copper bar conductor 1.

[0040] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, the through holes are circular holes.

[0041] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, the PVC insulation layer 2 covers the copper bar conductor 1 in a surrounding manner.

[0042] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, the high-temperature-resistant insulation layer 3 covers the copper bar conductor 1, the PVC insulation layer 2 covers the high-temperature-resistant insulation layer 3, and the copper bar conductor 1, the high-temperature-resistant insulation layer 3 and the PVC insulation layer 2 form a concentric layer structure in sequence.

[0043] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, the high-temperature-resistant insulation layer 3 is a mica paper layer arranged between the PVC insulation layer 2 and the copper bar conductor 1.

[0044] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, the mica paper layer is a single-layer mica paper.

[0045] In the preferred embodiment of the copper bar structure for preventing short-circuit sparking of high-voltage copper bars of a battery pack, the high-temperature-resistant insulation layer 3 is a mica tape covering the outer surface of the PVC insulation layer 2.

[0046] In the preferred embodiment of the copper bar structure for preventing short circuit and sparking of the high-voltage copper bar of the battery pack, the copper bar junction is a symmetrical structure.

[0047] A battery pack comprises,

[0048] a box,

[0049] a battery module 4 arranged in the box,

[0050] a plurality of the copper bar structures 5 arranged around the battery module 4 and connected to the battery module 4 by bolts.

[0051] In one embodiment, the high-temperature-resistant insulation layer 3 can resist a temperature of at least 1000℃.

[0052] As shown in Figure 1 The copper bar structure 5 is arranged around the battery module 4 and connected to the battery module 4 by bolts. As shown in Figures 2-4 When the battery module 4 is in thermal runaway, high temperature is generated, and the high-temperature-resistant insulation layer 3 has the characteristic of high-temperature-resistant insulation, so the structure of the PVC insulation layer 2 is still intact, and more serious thermal runaway caused by short circuit and sparking of the copper bar can be avoided. Figures 5-6 As shown in When the battery module 4 is in thermal runaway, high temperature is generated, and the high-temperature-resistant insulation layer 3 has the characteristic of high-temperature-resistant insulation, so the structure of the PVC insulation layer 2 is still intact, and more serious thermal runaway caused by short circuit and sparking of the copper bar can be avoided.

[0053] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present application.

Claims

1. A copper bar structure for preventing short circuit sparking of a high-voltage copper bar of a battery pack, characterized by, It comprises, a copper bar conductor, a PVC insulation layer arranged on the copper bar conductor, a high-temperature-resistant insulation layer arranged between the PVC insulation layer and the copper bar conductor, and / or wrapped on the outer surface of the PVC insulation layer.

2. The copper bar structure of claim 1, wherein, The copper bar conductor is respectively provided with a through hole at both ends.

3. The copper bar structure of claim 2, wherein, The through hole is a circular hole.

4. The copper bar structure of claim 1, wherein, The PVC insulation layer is wrapped around the copper bar conductor.

5. The copper bar structure of claim 1, wherein, The high-temperature-resistant insulation layer is wrapped on the copper bar conductor, the PVC insulation layer is wrapped on the high-temperature-resistant insulation layer, and the copper bar conductor, the high-temperature-resistant insulation layer, and the PVC insulation layer form a concentric layer structure in sequence.

6. The copper bar structure of claim 1, wherein, The high-temperature-resistant insulation layer is a mica paper layer arranged between the PVC insulation layer and the copper bar conductor.

7. The copper bar structure of claim 6, wherein, The mica paper layer is a single-layer mica paper.

8. The copper bar structure of claim 1, wherein, The high-temperature-resistant insulation layer is a mica tape wrapped on the outer surface of the PVC insulation layer.

9. The copper bar structure of claim 1, wherein, The copper bar junction is a symmetrical structure.

10. A battery pack, characterized by, It comprises, a box body, a battery module arrayed in the box body, a plurality of copper bar structures according to any one of claims 1-9 arranged around the battery module and connected with the battery module through bolts.

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