Battery module and battery system

Abstract

The utility model provides a battery module and a battery system, the battery module comprises a battery main body, the battery main body is provided with a temperature measuring panel, the temperature measuring panel is provided with temperature measuring points, one side of the temperature measuring panel back to the battery main body is movably connected with a plurality of temperature measuring buckles and a plurality of fixing buckles, the temperature measuring buckles are provided with first optical fiber holes and temperature measuring grooves, and the fixing buckles are provided with second optical fiber holes. The temperature measuring groove is connected with the first optical fiber hole and corresponds to the temperature measuring point in position, a second optical fiber hole and an open groove are formed in the fixing buckle, the open groove is connected with the second optical fiber hole, and the first optical fiber hole and the second optical fiber hole are both used for being connected with optical fibers. By arranging the temperature measuring buckle and the fixing buckle, the temperature measuring point position and the fixing point position of the optical fiber are separated, and the optical fiber is fixed by penetrating through the first optical fiber hole and the second optical fiber hole, so that the optical fiber is prevented from being extruded in the long-term use process, and the influence of stress generated by fixing on the signal of the optical fiber is avoided.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module and battery system. Background Technology

[0002] Lithium-ion batteries, with their advantages of high specific capacity, good rate performance, long cycle life and low cost, are now widely used in transportation vehicles such as drones and electric vehicles, as well as energy storage equipment such as energy storage stations and charging piles.

[0003] Currently, lithium-ion batteries are continuously developing towards higher energy density, larger size, and module integration. This leads to problems such as uneven distribution of internal state parameters within individual battery cells and significant differences in internal and external parameters between individual cells within a module. Traditional battery management relies solely on the battery's current and voltage signals and temperature information from a limited number of temperature measurement points within the module. This limited battery information results in insufficient management capabilities for the battery system. Therefore, distributed measurement of battery modules is crucial to improving the management capabilities of the battery system, with temperature measurement and management being paramount. During battery charging and discharging, the battery temperature rises significantly. Excessively high temperatures can affect the battery's electrochemical performance. If the battery is exposed to high temperatures for extended periods, it is prone to accelerated aging and may even lead to risk events such as thermal runaway.

[0004] Traditional thermocouple temperature measurement requires a separate thermocouple for each temperature measurement point, preventing multiplexing. Fiber optic sensors, however, allow for temperature detection at multiple points along a single fiber. However, existing methods for fixing fiber optic sensors are complex and have limitations. Embedding the fiber in the gaps of thermally conductive silicone or cushioning material only measures the temperature on the side of the battery, and the fiber is susceptible to compression during battery aging and expansion, leading to signal distortion. Using adhesive to fix the fiber results in poor reliability in applications with temperature variations and environmental corrosion. Furthermore, fibers are easily affected by external stress, and existing fixing methods can cause the signal at the measurement point to be influenced by force signals, making it difficult to decouple the temperature signal from the force signal. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a battery module and battery system, which aims to solve the problems in the prior art where fixing fiber optic sensors is difficult to decouple temperature and force signals, and the fixing methods are limited and the installation process is complicated.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0007] A battery module includes a battery body, a temperature measuring panel on the battery body, temperature measuring points on the temperature measuring panel, and a plurality of temperature measuring clips and a plurality of fixing clips movably connected to the side of the temperature measuring panel facing away from the battery body. The temperature measuring clips have a first optical fiber hole and a temperature measuring groove, both of which penetrate the clip. The temperature measuring groove connects to the side of the first optical fiber hole facing the temperature measuring panel and corresponds to the temperature measuring points. The fixing clips have a second optical fiber hole and an opening groove, both of which penetrate the clip. The opening groove connects to the side of the second optical fiber hole facing away from the temperature measuring panel. Both the first and second optical fiber holes are used to connect optical fibers.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: By setting the temperature measuring buckle and the fixing buckle, the temperature measuring point of the optical fiber is separated from the fixing point, and the optical fiber is fixed by passing through the first optical fiber hole and the second optical fiber hole, which avoids the optical fiber being squeezed during long-term use. If the volume of the battery body expands, it will not affect the signal of the optical fiber. The temperature measuring groove is connected to the first optical fiber hole, and the opening groove is connected to the second optical fiber hole, which helps to reduce the stress on the optical fiber. If the buckle undergoes thermal expansion or other deformation, the temperature measuring groove and the opening groove help to prevent the optical fiber from being squeezed by the buckle. The temperature measuring groove helps to conduct the temperature of the temperature measuring point to the optical fiber, making the temperature measurement more accurate. The installation method of fixing the temperature measuring buckle and the fixing buckle with the guide rail is relatively simple and flexible.

[0009] Furthermore, the side of the temperature measuring panel facing away from the battery body is provided with several splines, and the end of the splines facing away from the temperature measuring panel is detachably connected to a guide rail. A spline hole is opened at the bottom of the guide rail, and the spline hole is adapted to the splines.

[0010] Furthermore, the spline includes a cylinder and a plurality of teeth connected to the sidewalls of the cylinder.

[0011] Furthermore, the guide rail includes a slide groove, which is parallel to the temperature measuring panel and communicates with the spline hole. Positioning grooves are formed on the opposite side walls of the slide groove, and the positioning grooves are adapted to the teeth.

[0012] Furthermore, the bottom of the temperature measuring buckle is connected to a first slider, and the bottom of the fixing buckle is connected to a second slider. Both the first slider and the second slider are adapted to the slide groove so that the guide rail can be movably connected to the temperature measuring buckle or the fixing buckle.

[0013] Furthermore, the central axes of both the first and second fiber optic holes are parallel to the temperature measuring panel.

[0014] Furthermore, the diameter of the first optical fiber hole is larger than the diameter of the optical fiber, and thermally conductive silicone grease is disposed inside the temperature measuring groove.

[0015] Furthermore, an elastic washer is provided inside the second optical fiber hole, and the elastic washer is used to make an interference fit with the optical fiber.

[0016] A battery system includes an optical fiber sensor, an optical fiber demodulator, and a battery module as described in the above technical solution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the battery module structure in an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the fixing mechanism in the battery module in this embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the fixing mechanism and temperature measuring buckle in the battery module of this utility model embodiment;

[0020] Figure 4 This is a schematic diagram of the structure of the temperature measuring buckle and fixing buckle in the battery module of this utility model embodiment;

[0021] Figure 5 This is a schematic diagram of the structure of several battery modules connected in an embodiment of this utility model;

[0022] Explanation of key component symbols:

[0023]

[0024]

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0027] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0029] Please see Figures 1 to 4 The battery module in this embodiment includes a battery body 100, a temperature measuring panel 110 on the battery body 100, temperature measuring points on the temperature measuring panel 110, a plurality of temperature measuring clips 300 and a plurality of fixing clips 400 movably connected to the side of the temperature measuring panel 110 facing away from the battery body 100, and a plurality of splines 210 on the side of the temperature measuring panel 110 facing away from the battery body 100, the end of the splines 210 facing away from the temperature measuring panel 110 being detachably connected to a guide rail. 220, a spline hole 222 is provided at the bottom of the guide rail 220, the spline hole 222 is adapted to the spline 210, the spline 210 includes a cylinder and a plurality of teeth 211 connected to the side wall of the cylinder, the guide rail 220 includes a sliding groove 221, the sliding groove 221 is parallel to the temperature measuring panel 110, the sliding groove 221 is connected to the spline hole 222, and positioning grooves 223 are provided on the opposite side walls of the sliding groove 221, the positioning grooves 223 are adapted to the teeth 211. Preferably, the battery body 100 is the body of a prismatic battery. The side or top end cap of the battery body 100 can be set as the temperature measuring panel 110. Specifically, in this embodiment, the top end cap is set as the temperature measuring panel 110. A self-locking device is also provided on the spline 210 so that the guide rail 220 is fixed by the self-locking device after it matches the spline 210. The temperature measuring point can be near the pole post 120 or on the surface of the temperature measuring panel 110, depending on the distributed temperature measurement requirements. The spline 210 includes the cylinder. Different teeth 211 on the spline 210 can be inserted into the spline hole 222 and the positioning groove 223. It can be understood that the installation direction between the guide rail 220 and the spline 210 can be adjusted by rotation. The slide groove 221 provides a certain sliding space. The installation process of the fiber optic sensor is relatively simple and flexible.

[0030] The bottom of the temperature measuring buckle 300 is connected to a first slider 310, and the bottom of the fixing buckle 400 is connected to a second slider 410. Both the first slider 310 and the second slider 410 are adapted to the slide groove 221 so that the guide rail 220 can movably connect the temperature measuring buckle 300 or the fixing buckle 400. The temperature measuring buckle 300 has a first optical fiber hole 320 and a temperature measuring groove 330, both of which penetrate the temperature measuring buckle 300. The temperature measuring groove 330 connects to the side of the first optical fiber hole 320 facing the temperature measuring panel 110, and the temperature measuring groove 330 corresponds to the position of the temperature measuring point. The fixing buckle 400 has a second optical fiber hole. The second optical fiber hole 420 and the opening slot 430 both penetrate the fixing buckle 400. The opening slot 430 connects to the side of the second optical fiber hole 420 facing away from the temperature measuring panel 110. The first optical fiber hole 320 and the second optical fiber hole 420 are both used to connect optical fibers 500. The central axis of the first optical fiber hole 320 and the second optical fiber hole 420 is parallel to the temperature measuring panel 110. The diameter of the first optical fiber hole 320 is larger than the diameter of the optical fiber 500. Thermal conductive silicone grease 331 is provided in the temperature measuring slot 330. An elastic washer 421 is provided in the second optical fiber hole 420. The elastic washer 421 is used for interference fit with the optical fiber 500. Preferably, both the temperature-sensing buckle 300 and the fixing buckle 400 are made of metal, and both the first fiber optic hole 320 and the second fiber optic hole 420 are round holes. The size of the temperature-sensing groove 330 can be adjusted by bending the metal to accommodate fiber optic sensors of various sizes. The thermally conductive silicone grease 331 inside the temperature-sensing groove 330 is beneficial for heat conduction, and the metal material also has good heat conduction properties, resulting in better heat conduction between the temperature-sensing point and the temperature-sensing area on the fiber optic cable 500, leading to more accurate temperature measurement. Since the diameter of the first fiber optic hole 320 is larger than the diameter of the fiber optic cable 500, the fiber optic cable 500 and the temperature-sensing buckle 300 are loosely connected. This design avoids pressure on the temperature measurement point of the optical fiber 500 when the clip is used to fix it, thus preventing pressure from affecting the signal of the optical fiber 500 at the temperature measurement point. This achieves decoupling of the force signal and the signal generated by temperature measurement. The fixing of the optical fiber 500 is flexibly completed by the fixing clip 400. If the volume of the battery body 100 expands, the impact on the metal clip is small, thereby avoiding any impact on the signal of the optical fiber 500. The temperature measurement groove 330 is connected to the first optical fiber hole 320, and the opening groove 430 is connected to the second optical fiber hole 420, which helps to reduce stress on the optical fiber 500.

[0031] This utility model embodiment also provides a battery system, including an optical fiber sensor and an optical fiber demodulator. The battery system further includes the battery module as described in the above embodiment. Preferably, please refer to... Figure 5 The area near the positive and negative terminals of the battery is the key area for temperature measurement. After the fiber optic sensor of one battery is fixed, it is connected to the next battery in an S-shaped wiring pattern to complete the temperature measurement of different batteries in the battery system.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery module, characterized in that, The device includes a battery body, on which a temperature measuring panel is provided. Temperature measuring points are provided on the temperature measuring panel. Several temperature measuring clips and several fixing clips are movably connected to the side of the temperature measuring panel facing away from the battery body. A first optical fiber hole and a temperature measuring groove are provided on each temperature measuring clip, both penetrating the clip. The temperature measuring groove connects to the side of the first optical fiber hole facing the temperature measuring panel and corresponds to the position of the temperature measuring points. A second optical fiber hole and an opening groove are provided on each fixing clip, both penetrating the clip. The opening groove connects to the side of the second optical fiber hole facing away from the temperature measuring panel. Both the first and second optical fiber holes are used to connect optical fibers.

2. The battery module according to claim 1, characterized in that, The temperature measuring panel has several splines on the side facing away from the battery body. The end of the splines facing away from the temperature measuring panel is detachably connected to a guide rail. A spline hole is opened at the bottom of the guide rail, and the spline hole is adapted to the splines.

3. The battery module according to claim 2, characterized in that, The spline includes a cylinder and a plurality of teeth connected to the sidewalls of the cylinder.

4. The battery module according to claim 3, characterized in that, The guide rail includes a slide groove, which is parallel to the temperature measuring panel and communicates with the spline hole. Positioning grooves are formed on the two opposite side walls of the slide groove, and the positioning grooves are adapted to the teeth.

5. The battery module according to claim 4, characterized in that, The bottom of the temperature measuring buckle is connected to a first slider, and the bottom of the fixing buckle is connected to a second slider. Both the first slider and the second slider are adapted to the slide groove so that the guide rail can be movably connected to the temperature measuring buckle or the fixing buckle.

6. The battery module according to claim 1, characterized in that, The central axes of both the first and second fiber optic holes are parallel to the temperature measuring panel.

7. The battery module according to claim 1, characterized in that, The diameter of the first optical fiber hole is larger than the diameter of the optical fiber, and thermally conductive silicone grease is provided inside the temperature measuring groove.

8. The battery module according to claim 1, characterized in that, An elastic washer is provided inside the second optical fiber hole, and the elastic washer is used to make an interference fit with the optical fiber.

9. A battery system comprising an optical fiber sensor and an optical fiber demodulator, characterized in that, The battery system further includes the battery module as described in any one of claims 1 to 8.

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