Temperature detection assembly, battery pack, electric equipment and vehicle

Abstract

The utility model relates to a temperature detection assembly, a battery pack, electric equipment and a vehicle. The temperature detection assembly comprises a detection unit; the detection unit is used for being connected with the connecting assembly to detect the temperature of the connecting assembly, and the connecting assembly is used for communicating the battery module with the distribution box. According to the technical scheme, the temperature of the joint of the battery module and the distribution box is monitored.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of temperature detection assemblies, in particular to a temperature detection assembly, a battery pack, an electrical equipment and a vehicle. BACKGROUND

[0002] At present, the new energy vehicle industry enters a rapid growth period, and the power battery, as one of the three core technologies in the new energy vehicle, directly determines the use performance of the new energy vehicle. The power battery drives the motor to work by generating current, thereby driving the new energy vehicle to travel. The current of the power battery is easy to cause high temperature in the path through which the current passes, thereby affecting the safety performance. CONTENT OF THE INVENTION

[0003] The present application provides a temperature detection assembly, a battery pack, an electrical equipment and a vehicle, which realizes temperature monitoring of the connection position of the battery module and the distribution box, so as to at least partially solve the above technical problems.

[0004] In order to achieve the above purpose, according to the first aspect of the present application, a temperature detection assembly is provided, comprising: a detection unit, the detection unit is used to be connected with a connection assembly to detect the temperature of the connection assembly, and the connection assembly is used to communicate the battery module and the distribution box.

[0005] Optionally, the temperature detection assembly comprises: a connecting line, one end of the connecting line is connected with an external assembly; and the detection unit, one end of the detection unit is configured as a detection unit, and the other end of the detection unit is connected with the other end of the connecting line to transmit the temperature signal of the connection assembly to the external assembly.

[0006] Optionally, the detection unit comprises: a detection piece, one end of the detection piece is connected with the connecting line, and the detection piece is used to convert the temperature into an electrical signal; and a heat conduction piece, one end of the heat conduction piece is connected with the connection assembly, and the other end of the heat conduction piece is connected with the other end of the detection piece to transmit the temperature of the connection assembly to the detection piece.

[0007] According to the second aspect of the present application, a battery pack is provided, comprising the above-mentioned temperature detection assembly.

[0008] Optionally, the heat conduction piece of the detection unit comprises a heat conduction part, a first fixing hole is arranged on the heat conduction part, a second fixing hole is arranged on the connection assembly, and the first fixing hole and the second fixing hole are used to pass through a fixing piece to fix the heat conduction part and the connection assembly.

[0009] Optionally, the temperature detection assembly comprises a limiting structure arranged on the heat conduction part, a groove is arranged on the connection assembly, and the limiting structure and the groove are limited to cooperate to limit the position of the heat conduction part.

[0010] Optionally, the connecting assembly comprises a terminal, one end of the terminal is used for connecting with an output end of the battery module; an adapter, one end of the adapter is electrically connected with one end of the terminal, and the heat-conducting part is connected with the terminal and / or the adapter to detect the temperature of the connecting assembly.

[0011] Optionally, the second fixing hole is arranged on the adapter.

[0012] Optionally, the limiting groove is arranged on the adapter.

[0013] Optionally, the connecting assembly comprises a positive connecting assembly and / or a negative connecting assembly.

[0014] Optionally, the negative connecting assembly is arranged apart from the positive connecting assembly, and the detection unit is connected with the positive connecting assembly and / or the negative connecting assembly to detect the temperature of the positive connecting assembly and / or the negative connecting assembly.

[0015] According to a third aspect of the present application, a temperature detection assembly is provided.

[0016] According to a fourth aspect of the present application, a vehicle is provided.

[0017] In the temperature detection assembly of the embodiments of the present application, the detection unit is connected with the connecting assembly to detect the temperature of the connecting assembly, and the connecting assembly is used for connecting the battery pack with the distribution box. Through the above technical solution, the temperature of the connecting assembly can be monitored by using the temperature detection assembly, the temperature of the connecting assembly can be known, and corresponding regulation and control can be made according to the temperature of the connecting assembly, so that the safety performance can be improved.

[0018] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0020] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings, wherein the same reference numerals in the following description represent the same parts.

[0021] Figure 1 is a partial structure schematic diagram of the temperature detection assembly provided in the exemplary embodiments of the present disclosure;

[0022] Figure 2 is Figure 1 is an enlarged schematic view of A in FIG. 1;

[0023] Figure 3 is a schematic view of a temperature rise simulation difference between the heat conduction member and the connecting portion;

[0024] Figure 4 is a schematic view of a partial structure of the adapter provided in the exemplary embodiment of the present disclosure.

[0025] Explanation of Reference Signs:

[0026] positive electrode connecting assembly 10, positive electrode terminal 11, positive electrode adapter 12, negative electrode connecting assembly 20, negative electrode terminal 21, negative electrode adapter 22, temperature detection assembly 30, connecting wire 31, detection unit 32, detection member 33, heat conduction member 34, first heat conduction portion 341, second heat conduction portion 342, fixing member 40, first limiting block 50, second limiting block 60, connecting portion 70, press rivet nut 80. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0028] The power battery drives the motor to work by generating current, thereby driving the new energy vehicle to travel. The current of the power battery is easy to cause high temperature at the path through which the current passes, which affects the safety performance. At present, the safety performance of the vehicle is generally monitored by detecting the internal temperature of the battery module of the power battery.

[0029] The inventors of the present application found that the battery module and the distribution box of the battery pack are generally connected by bolts, which causes high temperature at the connection. Therefore, as shown in Figures 1 to 4 According to a first aspect of the present application, a temperature detection assembly is provided, comprising: a detection unit 32, the detection unit 32 is used to be connected with a connecting assembly to detect the temperature of the connecting assembly, and the connecting assembly is used to communicate the battery module and the distribution box.

[0030] Through the above technical solution, the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 is monitored by the temperature detection assembly 30, so that the user can know the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 in real time, and the running state of the battery pack is adjusted in time, which can improve the safety of the battery pack in use.

[0031] Optionally, the temperature detection assembly 30 comprises a connecting wire 31, one end of the connecting wire 31 is connected with the external assembly, and the other end of the connecting wire 31 is connected with the detection unit 32, so as to transmit the temperature signal of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 to the external assembly. Through the above structure, the detection unit 32 can detect the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 and convert it into an electrical signal, which is then transmitted to the external assembly through the connecting wire 31. In this way, the temperature of the electrical connection position can be monitored in real time, and once an abnormal temperature rise is found, an alarm can be sent immediately to avoid safety accidents such as fire or short circuit caused by overheating. Through continuous temperature monitoring, potential connection problems or overheating phenomena can be found in time, so that preventive measures can be taken to avoid faults.

[0032] Optionally, the detection unit 32 comprises a detection piece 33, one end of the detection piece 33 is connected with the connecting wire 31, and the detection piece 33 is used to convert the temperature into an electrical signal; a heat-conducting piece 34, one end of the heat-conducting piece 34 is connected with the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20, and the other end of the heat-conducting piece 34 is connected with the other end of the detection piece 33, so as to transmit the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 to the detection piece 33. In this application, the heat-conducting piece 34 is a temperature sensing probe. Optionally, the heat-conducting piece 34 can also be a heat-conducting silicone or heat-conducting cement, as long as it can meet the temperature detection requirements. In this application, the heat-conducting piece 34 is made of brass, which has high heat conductivity and good temperature sensing sensitivity. The detection piece 33 comprises a thermistor. The above structure is simple and easy to process, which not only meets the use requirements of the device, but also reduces the use cost of the device.

[0033] A thermistor is a temperature-sensitive protective element composed of semiconductor ceramic material, and its resistance value changes with temperature. The absolute value of the resistance temperature coefficient of a thermistor is usually 10-100 times larger than that of a metal, so it can detect small temperature changes, even 10^-6℃ temperature changes. This high sensitivity makes the thermistor have high precision and response speed in temperature measurement and control.

[0034] The operating temperature range of the thermistor is very wide, the normal temperature device is suitable for-55℃-315℃, the high temperature device is suitable for temperature higher than 315℃ (the highest can reach 2000℃ at present), and the low temperature device is suitable for-273℃-55℃. The wide range of operating temperature makes the thermistor suitable for temperature measurement and control under various extreme environmental conditions. At the same time, the thermistor is small in size and light in weight, which makes it very suitable for use in limited space, such as measuring the temperature of gaps, cavities and blood vessels in biological bodies which cannot be measured by other thermometers. And the resistance value of the thermistor can be selected arbitrarily between 0.1-100kΩ, which makes it very flexible in use and can be adjusted as needed.

[0035] According to a second aspect of the present application, a battery pack is provided, comprising the temperature detection assembly 30 described above.

[0036] Optionally, the heat conduction piece 34 of the detection unit 32 comprises a heat conduction part, the heat conduction part is provided with a first fixing hole, the connecting assembly 10 is provided with a second fixing hole, and the first fixing hole and the second fixing hole are used for penetrating the fixing piece 40 to fix the heat conduction part and the connecting assembly 10.

[0037] Optionally, the temperature detection assembly 30 comprises a limiting structure arranged on the heat conduction part, and the connecting assembly 10 is provided with a groove, and the limiting structure is limitedly matched with the groove to limit the position of the heat conduction part.

[0038] In the present application, the heat conduction part comprises a first heat conduction part 341 and a second heat conduction part 342, the first fixing hole comprises a first connecting hole and a third connecting hole, and the second fixing hole comprises a second connecting hole and a fourth connecting hole.

[0039] In the present application, the limiting structure comprises a first limiting block 50 and a second limiting block 60, and the groove comprises a first limiting groove and a second limiting groove.

[0040] Optionally, the connecting assembly 10 comprises a terminal, one end of the terminal is used for connecting with the output end of the battery module, an adapter, one end of the adapter is electrically connected with one end of the terminal, and the heat conduction part is connected with the terminal and / or the adapter to detect the temperature of the connecting assembly 10. In this way, the user can know the temperature of the connecting assembly in real time, and the safety of the battery pack in use can be improved.

[0041] As shown in Figure 4 The press rivet nut 80 is press riveted with the adapter, and the press riveting connection is a way of tightly connecting the rivet and the adapter by using pressure. The material of the rivet and the adapter is plastically deformed by external pressure, so as to realize tight connection.

[0042] Optionally, the connecting assembly comprises a positive electrode connecting assembly 10 and / or a negative electrode connecting assembly 20.

[0043] Optionally, the positive electrode connecting assembly 10 is arranged in the battery pack, the negative electrode connecting assembly 20 is arranged in the battery pack and is spaced apart from the positive electrode connecting assembly 10, and the detection unit 32 is connected with the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 to detect the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20. In this way, the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 can be monitored by the temperature detection assembly, so that the user can know the temperature of the positive electrode connecting assembly 10 and / or the negative electrode connecting assembly 20 in real time, and the operation state of the battery pack can be adjusted in time, so that the safety of the battery pack during use can be improved.

[0044] Optionally, the heat conduction structure includes a first heat conduction part 341, the first heat conduction part 341 is provided with a first connecting hole, the positive electrode connecting assembly 10 is provided with a second connecting hole, and the first connecting hole and the second connecting hole are used to pass the fixing part 40 to fix the first heat conduction part 341 and the positive electrode connecting assembly 10. In the present application, the first connecting hole and the second connecting hole are threaded holes, the above structure is simple, and not only can meet the fixing requirement of the first heat conduction part 341 and the positive electrode connecting assembly 10, but also can reduce the production cost of the device.

[0045] Optionally, the heat conduction structure includes a second heat conduction part 342, the second heat conduction part 342 is provided with a third connecting hole, the negative electrode connecting assembly 20 is provided with a fourth connecting hole, and the third connecting hole and the fourth connecting hole are used to pass the fixing part 40 to fix the second heat conduction part 342 and the negative electrode connecting assembly 20. In the present application, the third connecting hole and the fourth connecting hole are threaded holes, the above structure is simple, and not only can meet the fixing requirement of the second heat conduction part 342 and the negative electrode connecting assembly 20, but also can reduce the production cost of the device.

[0046] In other embodiments of the present application, the first heat conduction part 341 and the positive electrode connecting assembly 10, and the second heat conduction part 342 and the negative electrode connecting assembly 20 can also be connected by adhesion or clamping.

[0047] Optionally, the limiting structure includes a first limiting block 50 arranged on the first heat conduction part 341, and a first limiting groove arranged on the positive electrode connecting assembly 10, the first limiting block 50 and the first limiting groove are limited to cooperate to limit the position of the first heat conduction part 341. In this way, the displacement of the first heat conduction part 341 relative to the positive electrode connecting assembly 10 can be prevented, so that the stability of the device during operation can be ensured.

[0048] Optionally, the limiting structure comprises a second limiting block 60 arranged on the second heat-conducting part 342, and a second limiting groove arranged on the negative electrode connecting assembly 20, the second limiting block 60 being in limiting cooperation with the second limiting groove to limit the position of the second heat-conducting part 342. In this way, the displacement of the second heat-conducting part 342 relative to the negative electrode connecting assembly 20 can be prevented, so as to ensure the stability of the device during operation.

[0049] In the present application, the terminals include a positive electrode terminal 11 and a negative electrode terminal 21, and the adapters include a positive electrode adapter 12 and a negative electrode adapter 22.

[0050] Optionally, the positive electrode connecting assembly 10 comprises the positive electrode terminal 11, one end of which is used to be connected with the positive electrode output end of the battery module; and the positive electrode adapter 12, one end of which is electrically connected with one end of the positive electrode terminal 11, and a heat-conducting part is connected with the positive electrode terminal 11 and / or the positive electrode adapter 12 to detect the temperature of the positive electrode connecting assembly 10. In the present application, the positive electrode adapter 12 comprises a copper bar, the electrical conductivity of which is 6 times higher than that of iron and 2 times higher than that of aluminum, so that the copper bar can efficiently transmit current and signals without losing too much electric energy. Meanwhile, the copper bar has a high heat-conducting coefficient, which is 3 times higher than that of iron and 2 times higher than that of aluminum. Therefore, the copper bar can effectively disperse and transmit heat, preventing the device from being damaged due to overheating.

[0051] Optionally, the second connecting hole is arranged on the positive electrode adapter 12. In this way, the risk of fatigue fracture of the connecting part due to the excessive bearing force between the positive electrode terminal 11 and the positive electrode adapter 12 can be prevented, and the hidden danger of the sharp rise in temperature of the copper bar due to the manufacturing and assembly tolerances of the copper bar can also be avoided.

[0052] Optionally, the first limiting groove is arranged on the positive electrode adapter 12. In this way, the first limiting groove can cooperate with the first limiting block 50 to realize the limiting function.

[0053] Optionally, the negative electrode connecting assembly 20 comprises the negative electrode terminal 21, one end of which is used to be connected with the negative electrode output end of the battery module; and the negative electrode adapter 22, one end of which is electrically connected with one end of the negative electrode terminal 21, and a heat-conducting part is connected with the negative electrode terminal 21 and / or the negative electrode adapter 22 to detect the temperature of the negative electrode connecting assembly 20. In the present application, the negative electrode adapter 22 comprises a copper bar, the electrical conductivity of which is 6 times higher than that of iron and 2 times higher than that of aluminum, so that the copper bar can efficiently transmit current and signals without losing too much electric energy. Meanwhile, the copper bar has a high heat-conducting coefficient, which is 3 times higher than that of iron and 2 times higher than that of aluminum. Therefore, the copper bar can effectively disperse and transmit heat, preventing the device from being damaged due to overheating.

[0054] In the present application, the negative electrode terminal 21 and the positive electrode terminal 11 are through-wall terminals.

[0055] Figure 3The connection part 70 in the battery pack is the connection between the positive terminal 11 and the positive adapter 12 or the connection between the negative terminal 21 and the negative adapter 22. The heat conduction member 34 is installed on the copper bar close to the connection part 70. Through thermal simulation, the temperature at the heat conduction member 34 is 70.5°C, the temperature at the connection part 70 is 70.8°C, and the temperature rise simulation difference between the heat conduction member 34 and the connection part 70 is only 0.3°C. Therefore, the temperature of the heat conduction member 34 can basically replace the temperature of the connection part 70.

[0056] In the present embodiment, when the connection part 70 is connected to fail and the temperature A monitored by the heat conduction member 34 is higher than the preset copper bar temperature B, i.e., A > B, the heat conduction member 34 sends a feedback signal to the battery management system, the battery management system outputs a high-temperature alarm information, and the contactor is controlled to be disconnected, so that the main circuit is in a disconnected state, thereby reducing the risk of internal short circuit of the distribution box caused by continuous temperature rise.

[0057] Optionally, the third connecting hole is arranged on the negative adapter 22. In this way, the risk of fatigue fracture of the connecting member caused by the connecting member between the negative terminal 21 and the negative adapter 22 exceeding the bearing force and the hidden danger of the temperature of the copper bar rising sharply caused by the manufacturing and assembly tolerance of the copper bar can be prevented.

[0058] Optionally, the second limiting groove is arranged on the negative adapter 22. In this way, the first limiting block 50 can be cooperated with the second limiting groove to realize the limiting function.

[0059] According to a third aspect of the present application, a kind of electric equipment is provided, comprising the battery pack described above.

[0060] According to a fourth aspect of the present application, a kind of vehicle is also provided, comprising the electric equipment described above.

[0061] In the temperature detection assembly of the present application, the positive connection assembly 10 is arranged in the battery pack, the negative connection assembly 20 is arranged in the battery pack and is spaced apart from the positive connection assembly 10, and the temperature detection assembly 30 has a detection unit 32 connected to the positive connection assembly 10 and / or the negative connection assembly 20 to detect the temperature of the positive connection assembly 10 and / or the negative connection assembly 20. Through the above technical solution, the temperature of the positive connection assembly 10 and / or the negative connection assembly 20 is monitored by the temperature detection assembly 30, so that the user can know the temperature of the positive connection assembly 10 and / or the negative connection assembly 20 in real time, and the running state of the battery pack is adjusted in time, so that the safety of the battery pack during use can be improved.

[0062] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0063] The relative arrangement of components and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale of the various parts shown in the drawings. Techniques, methods, and apparatus known to those of ordinary skill are not discussed in detail because they would be understood that the techniques, methods, and apparatus are to be considered part of the specification. In all examples shown and discussed herein, any specific value is to be interpreted as illustrative only and not as a limitation. Thus, other examples of the example embodiments can have different values. It is noted that like numbers and letters on the figures identify like parts throughout the disclosure, thus, once an item is defined in one figure, it is not necessary to discuss it further in connection with other figures where it is shown.

[0064] In the description of the present application, it is to be understood that the orientation or positional relationships indicated by orientation words such as "front, back, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Without the opposite indication, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the present application. The orientation words "inner, outer" refer to the inner and outer relative to the contour of the components themselves.

[0065] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device described herein relative to the other device or structure is inverted, then a spatially relative term such as "above" can be interpreted as meaning "below" or "below" can be interpreted as meaning "above". The device can also be oriented in other ways (rotated at 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. The terms "first", "second", etc. as can be used herein do not have any specific meaning and are used only to distinguish one component from another.

[0066] In addition, it should be pointed out that the use of the terms "first", "second" and the like to define parts only facilitates the distinction of the corresponding parts, and the above terms have no special meaning unless otherwise stated, and therefore cannot be understood as limiting the scope of protection of the present application.

[0067] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A temperature detection component, characterized in that, include: A detection unit is used to connect to a connection assembly to detect the temperature of the connection assembly, which is used to connect the battery module to the power distribution box. The temperature detection component also includes: A connecting wire, one end of which is connected to an external component, and the other end of which is connected to the detection unit, so as to transmit the temperature signal of the connecting component to the external component; The detection unit includes: A detection element, one end of which is connected to the connecting line, is used to convert temperature into an electrical signal; A heat-conducting component, one end of which is connected to the connecting assembly, and the other end of which is connected to the other end of the detection component, so as to transfer the temperature of the connecting assembly to the detection component.

2. A battery pack, characterized in that, Includes the temperature detection component as described in claim 1.

3. The battery pack according to claim 2, characterized in that, The heat-conducting component of the detection unit includes a heat-conducting part, the heat-conducting part is provided with a first fixing hole, and the connecting component is provided with a second fixing hole. The first fixing hole and the second fixing hole are used to allow the fixing component to pass through, so as to fix the heat-conducting part to the connecting component.

4. The battery pack according to claim 3, characterized in that, The temperature detection component includes a limiting structure disposed on the heat-conducting part, and the connecting component is provided with a limiting groove. The limiting structure and the limiting groove cooperate to limit the position of the heat-conducting part.

5. The battery pack according to claim 4, characterized in that, The connection component includes: A terminal, one end of which is used to connect to the output terminal of the battery module; An adapter, one end of which is electrically connected to one end of the terminal, and a heat-conducting part connected to the terminal and / or the adapter to detect the temperature of the connection assembly.

6. The battery pack according to claim 5, characterized in that, The second fixing hole is provided on the adapter.

7. The battery pack according to claim 5, characterized in that, The limiting groove is provided on the adapter.

8. The battery pack according to any one of claims 3-7, characterized in that, The connection components include: a positive connection component and / or a negative connection component.

9. The battery pack according to claim 8, characterized in that, The negative electrode connection component is spaced apart from the positive electrode connection component, and the detection unit is connected to the positive electrode connection component and / or the negative electrode connection component to detect the temperature of the positive electrode connection component and / or the negative electrode connection component.

10. An electrical appliance, characterized in that, Includes the battery pack described in any one of claims 3-9.

11. A vehicle, characterized in that, Includes the battery pack as described in any one of claims 3-9, or the electrical equipment as described in claim 10.

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