High-voltage lithium battery

Abstract

The invention discloses a high-voltage lithium battery which comprises a battery box and a lithium battery body, and the lithium battery body is installed in the battery box. The lithium battery body comprises a plurality of lithium battery modules which are electrically connected with one another; the interior of the battery box is divided into a plurality of mounting cavities by partition plates, and the plurality of lithium battery modules are respectively mounted in the plurality of mounting cavities; the cooling device further comprises a heat dissipation assembly, the heat dissipation assembly comprises a conveying part, a liquid separation box and a plurality of liquid cooling mechanisms, and the conveying part is used for conveying cooling liquid into the liquid separation box and then conveying the cooling liquid into the liquid cooling mechanisms; and the plurality of liquid cooling mechanisms are respectively mounted in the mounting cavity and are used for cooling the lithium battery modules in the mounting cavity. The battery is divided into a plurality of lithium battery modules, the lithium battery modules are separated through the partition plates, when one lithium battery module abnormally heats, heat generated by the lithium battery module does not affect other battery cell modules under the action of the partition plates, and the safety performance of the battery can be improved to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a high-voltage lithium battery. Background Art

[0002] At present, the cooling of automotive power batteries is mainly carried out by setting a cooling plate at the bottom of the battery module, and removing the heat generated by the battery during operation from the bottom of the module through the flow of coolant in the cooling plate.

[0003] The battery cells inside the module are stacked and arranged, a cooling plate is set at the bottom of the module, a flow channel is designed in the cooling plate, and a cooling medium is passed through the flow channel. When in use, the heat conductive glue (pad) set between the bottom of the battery cell inside the module and the module shell, and between the module shell and the cooling plate is directly utilized to provide a heat dissipation path from the inside to the outside and from the top to the bottom for the battery. The circulating coolant is used to take away the transferred heat, thereby completing the heat dissipation.

[0004] However, since the existing power battery is designed to be installed as a whole in the battery box, the power battery is composed of multiple battery modules. When one of the battery modules is abnormally heated, the heat generated by the battery module will affect other battery modules, eventually causing the entire power battery to work abnormally. Summary of the invention

[0005] The problem to be solved by the present invention is to provide a high-voltage lithium battery, by dividing the battery into multiple lithium battery modules, and separating the lithium battery modules by partitions. When one of the lithium battery modules generates abnormal heat, the heat generated by the lithium battery module will not affect other battery modules under the action of the partition, thereby improving the safety performance of the battery to a certain extent.

[0006] The present invention provides a technical solution to solve the above problems: a high-voltage lithium battery, comprising a battery box and a lithium battery body, wherein the lithium battery body is installed in the battery box; the lithium battery body comprises a plurality of lithium battery modules, wherein the plurality of lithium battery modules are electrically connected to each other;

[0007] The interior of the battery box is divided into a plurality of installation cavities by a partition, and a plurality of the lithium battery modules are respectively installed in the plurality of installation cavities;

[0008] It also includes a heat dissipation component, which includes a conveying part, a liquid separation box and several liquid cooling mechanisms. The conveying part is used to transport the cooling liquid into the liquid separation box and then to the inside of the liquid cooling mechanism; several of the liquid cooling mechanisms are respectively installed in the installation cavity to dissipate heat for the lithium battery module in the installation cavity.

[0009] Preferably, the liquid cooling mechanism comprises a connecting pipe and two cooling plates, one end of the connecting pipe is connected to the liquid separation box, and the other end is connected to the two cooling plates.

[0010] Preferably, a plurality of flow channels for coolant to flow through are arranged in the cooling plate, and the side end surface of the cooling plate is in close contact with the side end surface of the lithium battery module.

[0011] Preferably, thermal conductive silicone grease is filled between the cooling plate and the lithium battery module.

[0012] Preferably, the liquid cooling mechanism further comprises a regulating member, and the regulating member is used to regulate the flow rate of the cooling liquid inside the liquid cooling mechanism.

[0013] Preferably, the regulating member can automatically adjust the flow rate of the cooling liquid inside the liquid cooling mechanism according to the temperature in the installation cavity.

[0014] Preferably, the adjusting member includes a gate plate, a mounting seat, an inductive adjustment ring and a connecting rod; the mounting seat is arranged on the connecting pipe, and the mounting seat is provided with a accommodating cavity for accommodating the gate plate and a movable hole cooperating with the connecting rod, one end of the connecting rod is connected to the gate plate, and the other end passes through the movable hole and extends out of the mounting seat, a limiting plate is provided at one end of the connecting rod located outside the mounting seat, the inductive adjustment ring is sleeved on the connecting rod and one end abuts against the mounting seat, and the other end abuts against the limiting plate.

[0015] Preferably, the adjusting member further comprises a spring, which is sleeved on the induction adjusting ring and has one end fixedly connected to the mounting seat and the other end fixedly connected to the limiting plate.

[0016] Preferably, the induction adjustment ring is made of titanium alloy memory material, and the induction adjustment ring can automatically adjust the axial length according to the temperature.

[0017] Preferably, a sealing ring is provided at the position where the connecting rod cooperates with the movable hole.

[0018] Compared with the prior art, the advantages of the present invention are: the present invention divides the battery into multiple lithium battery modules, and the lithium battery modules are separated by partitions. When one of the lithium battery modules generates abnormal heat, the heat generated by the lithium battery module will not affect other battery modules under the action of the partition, thereby improving the safety performance of the battery to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 is a cross-sectional view of a battery box of the present invention;

[0022] Figure 3 It is a partial structural schematic diagram of the heat dissipation assembly of the present invention;

[0023] Figure 4 yes Figure 3 The enlarged schematic diagram of point A in the middle;

[0024] Figure 5 It is a cross-sectional view of the adjusting member of the present invention.

[0025] The attached drawings are marked with: 1. Battery box, 2. Connecting pipe, 3. Separation box, 4. Lithium battery module, 5. Cooling plate, 6. Flow channel, 7. Mounting seat, 8. Limiting plate, 9. Spring, 10. Gate, 11. Accommodating cavity, 12. Sealing ring, 13. Induction adjustment ring, 14. Connecting rod, 15. Mounting cavity, 16. Partition. DETAILED DESCRIPTION

[0026] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0027] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the definition of "first" and "second" features can explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise specified and limited, the terms "assemble", "connect", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can also be a mechanical connection; it can be directly connected, or it can be connected through an intermediate medium, or the two elements can be internally connected. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0031] It should also be understood that the terms used in this description of the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present invention. As used in the description of the embodiments of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms of "a", "an" and "the" are intended to include plural forms.

[0032] The specific embodiment of the present invention is shown in the accompanying drawings. A high-voltage lithium battery comprises a battery box 1 and a lithium battery body, wherein the lithium battery body is installed in the battery box 1; the lithium battery body comprises a plurality of lithium battery modules 4, and the plurality of lithium battery modules 4 are electrically connected to each other;

[0033] The interior of the battery box 1 is divided into a plurality of installation cavities 15 by a partition 16, and a plurality of the lithium battery modules 4 are respectively installed in the plurality of installation cavities 15;

[0034] It also includes a heat dissipation component, which includes a conveying part, a liquid separation box 3 and a plurality of liquid cooling mechanisms. The conveying part is used to transport the cooling liquid into the liquid separation box 3 and then to the inside of the liquid cooling mechanism; the plurality of liquid cooling mechanisms are respectively installed in the installation cavity 15 to dissipate heat for the lithium battery module 4 in the installation cavity 15.

[0035] Specifically, the liquid cooling mechanism includes a connecting pipe 2 and two cooling plates 5, one end of the connecting pipe 2 is connected to the liquid separation box 3, and the other end is connected to the two cooling plates 5; a plurality of flow channels 6 for the coolant to flow through are arranged in the cooling plate 5, and the side end surface of the cooling plate 5 is in close contact with the side end surface of the lithium battery module 4, wherein the coolant flows into the flow channel of the cooling plate through the connecting pipe, and the cooling plate conducts the heat generated by the lithium battery module to the coolant in the flow channel, and the heat is taken away by the coolant to achieve the effect of heat dissipation; in order to reduce the contact gap between the cooling plate and the lithium battery module and improve the cooling effect of the cooling plate, thermal conductive silicone grease is filled between the cooling plate 5 and the lithium battery module 4.

[0036] It should be noted that, as known to those skilled in the art, the power battery of a new energy vehicle is composed of a plurality of battery cells. When the temperature of one of the battery cell modules rises abnormally, the battery cell module cannot be cooled down in a targeted manner. Therefore, in this embodiment, the liquid cooling mechanism further includes an adjusting member, which is used to adjust the flow rate of the coolant inside the liquid cooling mechanism. The adjusting member can automatically adjust the flow rate of the coolant inside the liquid cooling mechanism according to the temperature in the installation cavity 15.

[0037] In this embodiment, specifically, the adjusting member includes a gate plate 10, a mounting seat 7, an inductive adjustment ring 13 and a connecting rod 14; the mounting seat 7 is arranged on the connecting pipe 2, and the mounting seat 7 is provided with a accommodating cavity 11 for accommodating the gate plate 10 and a movable hole cooperating with the connecting rod 14, one end of the connecting rod 14 is connected to the gate plate 10, and the other end passes through the movable hole and extends out of the mounting seat 7, a limiting plate 8 is provided at one end of the connecting rod 14 located outside the mounting seat 7, the inductive adjustment ring 13 is sleeved on the connecting rod 14 and one end abuts against the mounting seat 7, and the other end abuts against the limiting plate 8.

[0038] The adjusting member further comprises a spring 9, which is sleeved on the induction adjusting ring 13 and fixedly connected to the mounting seat 7 at one end and fixedly connected to the limit plate 8 at the other end. Specifically, the induction adjusting ring 13 is made of titanium alloy memory material, and the induction adjusting ring 13 can automatically adjust the axial length according to the temperature.

[0039] In this embodiment, in order to improve the sealing performance between the connecting rod and the movable hole and prevent the coolant from leaking from the connection between the connecting rod and the movable hole, a sealing ring 12 is provided at the position where the connecting rod 14 cooperates with the movable hole.

[0040] In the above technical scheme, it should be noted that under normal conditions, the flow rate of the coolant entering the connecting pipe through the liquid separation box is consistent. When one of the lithium battery modules is abnormally heated, the heat generated by the lithium battery module reaches the deformation temperature of the induction adjustment ring, and the induction adjustment ring undergoes axial deformation, driving the connecting rod and the gate to move in the deformation direction of the induction adjustment ring, thereby increasing the opening of the connecting pipe and allowing more coolant to flow through, thereby improving the cooling capacity of the cooling mechanism in the installation cavity. In addition, since the induction adjustment ring 13 can automatically adjust the axial length according to the temperature, when the heat generation of the lithium battery module continues to increase, the length of the induction adjustment ring also continues to increase, and the opening of the connecting pipe also continues to increase, so that the present scheme can adjust the coolant flow rate according to the heat generation of the lithium battery module, and the coolant flow rate of the cooling mechanism in the remaining lithium battery modules remains unchanged (there is no need to increase the coolant flow rate of the entire power battery system like a traditional cooling device), saving energy and having a high degree of automation.

[0041] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A high-voltage lithium battery, comprising a battery box (1) and a lithium battery body, wherein the lithium battery body is installed in the battery box (1); characterized in that: The lithium battery body comprises a plurality of lithium battery modules (4), and the plurality of lithium battery modules (4) are electrically connected to each other; The interior of the battery box (1) is divided into a plurality of installation cavities (15) by a partition (16), and a plurality of the lithium battery modules (4) are respectively installed in the plurality of installation cavities (15); It also includes a heat dissipation component, which includes a conveying member, a liquid separation box (3) and a plurality of liquid cooling mechanisms. The conveying member is used to convey the cooling liquid into the liquid separation box (3) and then into the liquid cooling mechanism; the plurality of liquid cooling mechanisms are respectively installed in the installation cavity (15) to dissipate heat for the lithium battery module (4) in the installation cavity (15).

2. A high voltage lithium battery according to claim 1, characterized in that: The liquid cooling mechanism comprises a connecting pipe (2) and two cooling plates (5); one end of the connecting pipe (2) is connected to the liquid separation box (3), and the other end is connected to the two cooling plates (5).

3. A high voltage lithium battery according to claim 2, characterized in that: The cooling plate (5) is provided with a plurality of flow channels (6) for cooling liquid to flow through, and the side end surface of the cooling plate (5) is in close contact with the side end surface of the lithium battery module (4).

4. A high voltage lithium battery according to claim 3, characterized in that: Thermally conductive silicone grease is filled between the cooling plate (5) and the lithium battery module (4).

5. A high voltage lithium battery according to claim 3, characterized in that: The liquid cooling mechanism also includes a regulating member, which is used to regulate the flow rate of the cooling liquid inside the liquid cooling mechanism.

6. A high voltage lithium battery according to claim 5, characterized in that: The regulating member can automatically regulate the flow rate of the cooling liquid inside the liquid cooling mechanism according to the temperature inside the installation cavity (15).

7. A high voltage lithium battery according to claim 6, characterized in that: The adjusting member comprises a gate plate (10), a mounting seat (7), an inductive adjusting ring (13) and a connecting rod (14); the mounting seat (7) is arranged on the connecting pipe (2); the mounting seat (7) is provided with a receiving cavity (11) for receiving the gate plate (10) and a movable hole matched with the connecting rod (14); one end of the connecting rod (14) is connected with the gate plate (10), and the other end passes through the movable hole and extends out of the mounting seat (7); a limiting plate (8) is provided at one end of the connecting rod (14) located outside the mounting seat (7); the inductive adjusting ring (13) is sleeved on the connecting rod (14) and one end abuts against the mounting seat (7), and the other end abuts against the limiting plate (8).

8. A high voltage lithium battery according to claim 7, characterized in that: The adjusting member also includes a spring (9), which is sleeved on the induction adjusting ring (13) and has one end fixedly connected to the mounting seat (7) and the other end fixedly connected to the limiting plate (8).

9. A high voltage lithium battery according to claim 7 or 8, characterized in that: The induction adjustment ring (13) is made of a titanium alloy memory material, and the induction adjustment ring (13) can automatically adjust the axial length according to the temperature.

10. A high voltage lithium battery according to claim 7, characterized in that: A sealing ring (12) is provided at the position where the connecting rod (14) cooperates with the movable hole.

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