Voltage acquisition device for battery module
By designing a fixing plate and probe structure on the battery module, the problems of low voltage acquisition efficiency and poor accuracy are solved, achieving high efficiency, stability and consistency in voltage acquisition, and improving the voltage acquisition efficiency and accuracy of the battery module.
Patent Information
- Application Number
- CN202521446651.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-10
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-07-10
AI Technical Summary
Existing battery modules suffer from low voltage acquisition efficiency, poor accuracy and consistency, and deviations exist in the contact position and angle between the probe and the electrode.
Design a voltage acquisition device for a battery module. The device adopts a fixed plate and probe structure. The fixed plate is provided with positioning holes and viewing holes. The probes are connected by elastic elements and can be connected to the electrodes one by one. The device is positioned and guided by the pressure relief valve and viewing holes to ensure accurate docking and stable contact between the probes and electrodes.
It improves the accuracy and consistency of voltage acquisition, enables batch voltage acquisition, and enhances the stability and ease of use of voltage acquisition.
Smart Images
Figure CN224682310U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to a voltage acquisition device for a battery module. Background Technology
[0002] Voltage acquisition is a crucial part of the battery module inspection process. Current voltage acquisition operations for battery modules typically involve sequentially contacting multiple electrodes on the battery module with probes to collect the electrode voltage point by point. This method is inefficient, and because the contact position and angle between the probe and the electrode vary each time, the contact quality between the probe and the electrode is inconsistent, which affects the accuracy and consistency of voltage acquisition. Utility Model Content
[0003] The main purpose of this invention is to propose a voltage acquisition device for battery modules, which aims to solve the technical problems of low efficiency, poor accuracy and consistency in the point-to-point voltage acquisition of battery modules in the prior art.
[0004] To achieve the above objectives, this utility model proposes a voltage acquisition device for a battery module. One surface of the battery module forms a lead-out surface, on which multiple electrodes and multiple pressure relief valves are disposed. The voltage acquisition device includes a fixing plate and multiple probes. The fixing plate is supported on the lead-out surface, with one side of the fixing plate facing the lead-out surface forming an abutment surface, and the side of the fixing plate facing away from the lead-out surface forming a mounting surface. The fixing plate has multiple positioning holes and multiple viewing holes. The wall of each positioning hole facing the mounting surface is chamfered. The number of positioning holes and electrodes is the same and they are arranged in a one-to-one correspondence. The number of viewing holes and pressure relief valves is the same and they are arranged in a one-to-one correspondence. Each pressure relief valve can pass through its corresponding viewing hole. Each probe is movably connected to the mounting surface and electrically connected to a acquisition line. The number of probes and electrodes is the same and they are arranged in a one-to-one correspondence. Each probe and its connected acquisition line can move relative to the fixing plate and pass through its corresponding positioning hole, so that the probe abuts against its corresponding electrode.
[0005] In one embodiment, each of the probes is connected to the mounting surface via an elastic element. The probe can be pushed to move toward the electrode and compress the elastic element, and the probe can also move away from the electrode under the elastic force of the elastic element until it is reset.
[0006] In one embodiment, the elastic element is a spring, which is connected between the mounting surface and the corresponding probe, and the spring is sleeved on the outside of the corresponding probe.
[0007] In one embodiment, the probe includes a needle tip and a needle cap, a spring is sleeved on the outside of the needle tip, and one end of the spring abuts against the needle cap. The side of the needle cap facing away from the needle tip is connected to the acquisition line.
[0008] In one embodiment, the positioning hole includes a positioning section and a guide section that are connected to each other. The positioning section is close to the abutment surface, and the guide section is close to the mounting surface. The connection between the positioning section and the guide section is of equal diameter. The hole wall of the guide section is radially inclined outward from the connection to the mounting surface, and the inclination angle of the hole wall of the guide section is greater than 45°.
[0009] In one embodiment, each of the viewing holes matches the shape of the pressure relief valve, and the viewing hole can be plugged into the corresponding pressure relief valve.
[0010] In one embodiment, a dust cover is installed on the mounting surface corresponding to each of the viewing holes, each dust cover is disposed outside the corresponding viewing hole, and each dust cover protrudes from the mounting surface in a direction away from the fixing plate; the dust cover is transparent.
[0011] In one embodiment, the fixing plate includes a collection part and two handles located on both sides of the collection part. The collection part is supported on the lead-out surface and matches the shape of the lead-out surface. Each of the positioning holes and each of the viewing holes are opened in the collection part. The handles are protruding in a direction away from the collection part.
[0012] In one embodiment, the fixing plate includes a fixing layer and a heat dissipation layer stacked together. The side of the heat dissipation layer facing away from the fixing layer forms the abutting surface, and the side of the fixing layer facing away from the heat dissipation layer forms the mounting surface. Each positioning hole and each viewing hole sequentially penetrates the fixing layer and the heat dissipation layer along the stacking direction of the fixing layer and the heat dissipation layer.
[0013] In one embodiment, the heat dissipation layer is a ceramic layer, and the fixing layer is a bakelite board layer.
[0014] The voltage acquisition device for a battery module proposed in this utility model utilizes multiple positioning holes and multiple viewing holes on a fixed plate. When the contact surface of the fixed plate abuts against the lead-out surface of the battery module, multiple pressure relief valves on the lead-out surface can be inserted into the multiple viewing holes one by one. The viewing holes allow for clearance of the pressure relief valves, and the cooperation between the multiple pressure relief valves and the multiple viewing holes achieves positioning of the fixed plate relative to the battery module, keeping the fixed plate fixed relative to the battery module. This ensures that the multiple positioning holes are aligned directly with the multiple electrodes on the lead-out surface, allowing multiple probes to pass through the multiple positioning holes and abut against the multiple electrodes. The contact position and angle of each probe with the electrode remain consistent, effectively improving the accuracy and consistency of voltage acquisition. By chamfering the end of the positioning hole facing the mounting surface, the probes are guided, facilitating their insertion into the positioning holes and making it easier to clamp the acquisition wire after voltage acquisition. By setting multiple probes on the mounting surface of the fixed plate, each probe corresponds to a different electrode, and the probes are connected to an external processing module via multiple acquisition lines. This enables batch voltage acquisition of multiple electrodes on the battery module, effectively improving the voltage acquisition efficiency of the battery module. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 A schematic diagram of the structure of a fixing plate for a voltage acquisition device of a battery module provided by this utility model; Figure 2 A partial structural side view of an embodiment of the voltage acquisition device for the battery module provided by this utility model.
[0017] Explanation of icon numbers: 10. Fixing plate; 11. Positioning hole; 111. Positioning section; 112. Guide section; 12. Viewing hole; 13. Abutment surface; 14. Mounting surface; 15. Acquisition unit; 16. Handle; 20. Probe; 21. Acquisition line; 22. Needle tip; 23. Needle cap; 30. Elastic element; 100. Battery module.
[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0020] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0021] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0022] Voltage acquisition is a crucial part of the battery module inspection process. Current voltage acquisition operations for battery modules typically involve sequentially contacting multiple electrodes on the battery module with a probe to collect the electrode voltage point by point. This method is inefficient, and because the contact position and angle between the probe and the electrode vary each time, the contact quality between the probe and the electrode is inconsistent, which affects the accuracy and consistency of voltage acquisition.
[0023] This utility model proposes a voltage acquisition device for a battery module. One surface of the battery module 100 forms a lead-out surface, on which multiple electrodes and multiple pressure relief valves are arranged. The voltage acquisition device includes a fixing plate 10 and multiple probes 20. The fixing plate 10 is supported on the lead-out surface, and the side of the fixing plate 10 facing the lead-out surface forms an abutment surface 13. The side of the fixing plate 10 away from the lead-out surface forms a mounting surface 14. The fixing plate 10 has multiple positioning holes 11 and multiple viewing holes 12. The wall of each positioning hole 11 facing the mounting surface 14 is chamfered. The mounting plate 10 has multiple positioning holes 11 and multiple electrodes of the same number and in one-to-one correspondence. Multiple viewing holes 12 and multiple pressure relief valves of the same number and in one-to-one correspondence are also provided. Each pressure relief valve can be inserted into the corresponding viewing hole 12. Each probe 20 is movably connected to the mounting surface 14 and each probe 20 is electrically connected to a data acquisition line 21. The multiple probes 20 and multiple electrodes of the same number and in one-to-one correspondence are also provided. Each probe 20 and the data acquisition line 21 connected to it can move relative to the fixing plate 10 and be inserted into the corresponding positioning hole 11 so that the probe 20 abuts against the corresponding electrode.
[0024] Please see Figure 1 The contact surface 13 of the fixing plate 10 faces the lead-out surface of the battery module 100, and the contact surface 13 can abut against the lead-out surface. When the contact surface 13 abuts against the lead-out surface, each pressure relief valve passes through the corresponding viewing hole 12, so that the fixing plate 10 remains fixed relative to the battery module 100, and each positioning hole 11 is aligned with the corresponding electrode. The probe 20 is connected to the mounting surface 14 of the fixing plate 10, so that the probe 20 does not affect the abutment fit between the contact surface 13 and the lead-out surface; multiple probes 20 are set for multiple electrodes, and each probe 20 can move relative to the fixing plate 10 towards the electrode, so that each probe 20 and the acquisition line 21 connected to it pass through the corresponding positioning hole 11 and abut against the corresponding electrode. Each probe 20 is connected to an external processing module through the acquisition line 21, and the external processing module can realize the simultaneous acquisition of voltage from multiple electrodes on the battery module 100. It should be noted that the external processing module and its voltage acquisition method with the battery module 100 both adopt existing technology.
[0025] The voltage acquisition device for the battery module proposed in this utility model has multiple positioning holes 11 and multiple viewing holes 12 on the fixed plate 10. When the contact surface 13 of the fixed plate 10 abuts against the lead-out surface of the battery module 100, multiple pressure relief valves on the lead-out surface can be inserted into the multiple viewing holes 12 one by one. The pressure relief valves are avoided by opening the viewing holes 12, and the positioning of the fixed plate 10 and the battery module 100 is achieved by the cooperation of multiple pressure relief valves and multiple viewing holes 12. The fixed plate 10 is kept fixed relative to the battery module 100, ensuring that the multiple positioning holes 11 can be set directly opposite to the multiple electrodes on the lead-out surface. Multiple probes 20 can be inserted into the multiple positioning holes 11 and abut against the multiple electrodes. The abutment position and angle of each probe 20 with the electrode are consistent, which effectively improves the accuracy and consistency of voltage acquisition. By chamfering the end of the positioning hole 11 facing the mounting surface 14, the probe 20 can be guided, facilitating its insertion into the positioning hole 11 and enabling the clamping of the acquisition line 21 after voltage acquisition. By setting multiple probes 20 on the mounting surface 14 of the fixing plate 10, each probe 20 corresponds to a different electrode, and these probes 20 are connected to an external processing module via multiple acquisition lines 21. This enables batch voltage acquisition from multiple electrodes on the battery module 100, effectively improving the voltage acquisition efficiency of the battery module 100.
[0026] In one embodiment, each probe 20 is connected to the mounting surface 14 via an elastic member 30. The probe 20 can move toward the electrode and compress the elastic member 30 when pushed, and the probe 20 can also move away from the electrode under the elastic force of the elastic member 30 until it is reset.
[0027] Understandably, each probe 20 is connected to the mounting surface 14 via an elastic element 30. When an external force is applied to a probe 20, the probe 20 moves towards the electrode, while the elastic element 30 is compressed. When the external force disappears, driven by the elastic force of the elastic element 30 itself, the probe 20 moves away from the electrode until it returns to its initial position. The elastic element 30 allows the probe 20 to adapt to minor unevenness on the electrode surface through elastic deformation when it contacts the electrode to collect voltage, ensuring good electrical contact between the probe 20 and the electrode, thereby improving the stability and reliability of voltage acquisition. Furthermore, after voltage acquisition is completed, the probe 20 can automatically reset, facilitating subsequent voltage acquisition operations and improving the ease of use and efficiency of the acquisition device.
[0028] In one embodiment, the elastic element 30 is a spring, which is connected between the mounting surface 14 and the corresponding probe 20, and the spring is sleeved on the outside of the corresponding probe 20.
[0029] Furthermore, the elastic element 30 is a spring, which connects the mounting surface 14 and the corresponding probe 20, and is sleeved on the outside of the corresponding probe 20. When an external force is applied to the probe 20, the probe 20 moves axially toward the electrode. At this time, the spring is compressed, producing elastic deformation and storing elastic potential energy. When the external force is removed, the spring releases the elastic potential energy, and the resulting elastic force pushes the probe 20 axially away from the electrode until it returns to its initial position, completing the reset of the probe 20. By sleeved on the outside of the probe 20, the elastic force of the spring can be applied evenly to the probe 20, further enhancing the smoothness and accuracy of the probe 20's movement.
[0030] In one embodiment, the probe 20 includes a needle tip 22 and a needle cap 23. A spring is sleeved on the outside of the needle tip 22, and one end of the spring abuts against the needle cap 23. The side of the needle cap 23 facing away from the needle tip 22 is connected to the acquisition line 21.
[0031] Please see Figure 2 The probe 20 consists of a needle head 22 and a needle cap 23. A spring is sleeved on the outside of the needle head 22, with one end of the spring abutting against the needle cap 23. The diameter of the needle cap 23 is larger than the diameter of the spring, allowing the needle cap 23 to engage the spring between the needle cap 23 and the fixing plate 10. The spring sleeved on the outside of the needle head 22 provides guidance for the spring, maintaining its axial movement during compression and tension, effectively improving the spring's stability. When an external force is applied to the needle cap 23, the probe 20 moves axially towards the electrode, and the needle cap 23 compresses the spring, causing it to elastically deform and store elastic potential energy. When the external force is removed, the spring releases its elastic potential energy, and the resulting elastic force pushes the needle head 22 and the needle cap 23 axially away from the electrode until they are reset.
[0032] In one embodiment, the positioning hole 11 includes a positioning section 111 and a guide section 112 that are connected to each other. The positioning section 111 is close to the abutment surface 13, and the guide section 112 is close to the mounting surface 14. The connection between the positioning section 111 and the guide section 112 is set with equal diameter. The hole wall of the guide section 112 is inclined radially outward from the connection to the mounting surface 14, and the inclination angle of the hole wall of the guide section 112 is greater than 45°.
[0033] Please see Figure 2The positioning section 111 is located near the abutment surface 13 and is used to precisely position the probe 20, ensuring accurate alignment between the probe 20 and the electrode. The guide section 112 is located near the mounting surface 14, and the hole wall of the guide section 112 is radially inclined outward from the connection point to the mounting surface 14. This allows the probe 20 to smoothly enter the positioning section 111 along the inclined hole wall of the guide section 112 when inserted into the positioning hole 11. Even if there is a deviation in the insertion angle of the probe 20, it can still accurately enter the positioning section 111 through the guidance of the guide section 112, achieving precise docking with the electrode and effectively improving the stability and accuracy of probe 20 insertion. By tilting the hole wall of the guide section 112 at an angle greater than 45°, it can accommodate probes 20 at most angles, greatly improving the adaptability of the probe 20.
[0034] In one embodiment, each viewing hole 12 is shaped to match the pressure relief valve, and the viewing hole 12 can be inserted and engaged with the corresponding pressure relief valve.
[0035] Understandably, the shapes of the viewing holes 12 and the pressure relief valves are matched, allowing the pressure relief valves to be precisely inserted into the viewing holes 12, ensuring a tight fit between the two. When the contact surface 13 of the fixing plate 10 abuts against the lead-out surface of the battery module 100, the pressure relief valves can be smoothly inserted into the corresponding viewing holes 12, thereby achieving accurate positioning and fixation of the fixing plate 10 and the battery module 100.
[0036] In one embodiment, a dust cover is installed on the mounting surface 14 at the position corresponding to each viewing hole 12. Each dust cover covers the corresponding viewing hole 12 and is provided to protrude from the mounting surface 14 in a direction away from the fixing plate 10. The dust cover is transparent.
[0037] It can be explained that the dust cover can effectively prevent external dust, impurities or liquids from entering the viewing hole 12, thereby protecting the internal structure of the viewing hole 12. At the same time, the transparent dust cover design allows operators to directly observe the internal condition of the viewing hole 12 without removing the dust cover, which facilitates daily inspection and maintenance work and improves the maintainability and reliability of the device.
[0038] In one embodiment, the fixing plate 10 includes a collection part 15 and two handles 16 located on both sides of the collection part 15. The collection part 15 is supported on the lead-out surface and matches the shape of the lead-out surface. Each positioning hole 11 and each viewing hole 12 are opened in the collection part 15. The handles 16 are protruding in a direction away from the collection part 15.
[0039] Understandably, the shape of the acquisition unit 15 matches the shape of the lead-out surface, allowing the acquisition unit 15 to fit tightly against the lead-out surface of the battery module 100, ensuring the stability and reliability of the fixing plate 10 during voltage acquisition. The handle 16 protrudes outward from the lead-out surface, providing an attachment point for the operator to easily grasp the voltage acquisition device, thus facilitating its loading and unloading from the battery module 100.
[0040] In one embodiment, the fixing plate 10 includes a fixing layer and a heat dissipation layer stacked together. The side of the heat dissipation layer facing away from the fixing layer forms an abutment surface 13, and the side of the fixing layer facing away from the heat dissipation layer forms an mounting surface 14. Each positioning hole 11 and each viewing hole 12 passes through the fixing layer and the heat dissipation layer sequentially along the stacking direction of the fixing layer and the heat dissipation layer.
[0041] It should be noted that the heat dissipation layer forms the contact surface 13, which is used for direct contact with the lead-out surface. By setting the heat dissipation layer so that the contact surface 13 abuts against the lead-out surface, the heat dissipation layer can fit tightly against the lead-out surface, realizing heat conduction to the lead-out surface, which facilitates effective heat dissipation of the battery module 100 during voltage acquisition and maintains the stability of the voltage in the battery module 100. The fixing layer provides stable support for the fixing plate 10, ensuring the secure installation of the probe 20.
[0042] In one embodiment, the heat dissipation layer is a ceramic layer and the fixing layer is a bakelite board layer.
[0043] It can be noted that the ceramic layer is made of existing ceramic materials, giving it excellent thermal conductivity and good thermal stability. This effectively absorbs and quickly dissipates the heat generated by the battery module 100 during operation, preventing the mounting plate 10 from overheating and affecting its performance and lifespan. Furthermore, the ceramic layer possesses high mechanical strength and good insulation properties, providing excellent physical protection to ensure the stability and reliability of the mounting plate 10 during long-term use, preventing current interference during voltage acquisition, and guaranteeing the accuracy of the voltage acquisition data. The bakelite board layer is made of existing bakelite boards, giving it good insulation and machinability. This provides a stable mounting platform for the probe 20 and other related components, ensuring their electrical safety during voltage acquisition. The bakelite board layer also possesses a certain degree of mechanical strength and corrosion resistance, enabling it to adapt to various complex working environments and extending the service life of the mounting plate 10.
[0044] The above description is merely an exemplary embodiment of the present utility model and does not limit the scope of protection of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present utility model.
Claims
1. A voltage acquisition device for a battery module, characterized in that, One surface of the battery module forms a lead-out surface, and multiple electrodes and multiple pressure relief valves are disposed on the lead-out surface. The voltage acquisition device includes: A fixing plate is provided, which is supported on the lead-out surface. The side of the fixing plate facing the lead-out surface forms an abutment surface, and the side of the fixing plate away from the lead-out surface forms a mounting surface. The fixing plate has multiple positioning holes and multiple viewing holes. The hole wall of each positioning hole facing the mounting surface is chamfered. The number of multiple positioning holes and multiple electrodes are the same and they are arranged in a one-to-one correspondence. The number of multiple viewing holes and multiple pressure relief valves are the same and they are arranged in a one-to-one correspondence. Each pressure relief valve can be inserted into the corresponding viewing hole. Multiple probes are provided, each probe being movably connected to the mounting surface and electrically connected to a data acquisition line. The number of probes and electrodes are the same and they are arranged in a one-to-one correspondence. Each probe and the data acquisition line connected to it can move relative to the fixing plate and pass through the corresponding positioning hole so that the probe abuts against the corresponding electrode.
2. The voltage acquisition device for the battery module as described in claim 1, characterized in that, Each of the probes is connected to the mounting surface via an elastic element. The probe can be pushed to move toward the electrode and compress the elastic element, and the probe can also move away from the electrode under the elastic force of the elastic element until it is reset.
3. The voltage acquisition device for the battery module as described in claim 2, characterized in that, The elastic element is a spring, which is connected between the mounting surface and the corresponding probe, and the spring is sleeved on the outside of the corresponding probe.
4. The voltage acquisition device for the battery module as described in claim 3, characterized in that, The probe includes a needle tip and a needle cap. The spring is sleeved on the outside of the needle tip, and one end of the spring abuts against the needle cap. The side of the needle cap facing away from the needle tip is connected to the acquisition line.
5. The voltage acquisition device for a battery module as described in claim 1, characterized in that, The positioning hole includes a positioning section and a guide section that are connected to each other. The positioning section is close to the abutment surface, and the guide section is close to the mounting surface. The connection between the positioning section and the guide section is set with equal diameter. The hole wall of the guide section is radially inclined outward from the connection to the mounting surface, and the inclination angle of the hole wall of the guide section is greater than 45°.
6. The voltage acquisition device for a battery module as described in any one of claims 1 to 5, characterized in that, Each of the aforementioned viewing holes is shaped to match the pressure relief valve, and the viewing hole can be inserted and engaged with the corresponding pressure relief valve.
7. The voltage acquisition device for a battery module as described in any one of claims 1 to 5, characterized in that, A dust cover is installed on the mounting surface corresponding to each of the viewing holes. Each dust cover covers the corresponding viewing hole and protrudes from the mounting surface away from the fixing plate. The dust cover is transparent.
8. The voltage acquisition device for a battery module as described in any one of claims 1 to 5, characterized in that, The fixing plate includes a collection part and two handles located on both sides of the collection part. The collection part is supported on the lead-out surface and matches the shape of the lead-out surface. Each of the positioning holes and each of the viewing holes are opened in the collection part. The handles are protruding in a direction away from the collection part.
9. The voltage acquisition device for a battery module as described in any one of claims 1 to 5, characterized in that, The fixing plate includes a fixing layer and a heat dissipation layer stacked together. The side of the heat dissipation layer facing away from the fixing layer forms the abutting surface, and the side of the fixing layer facing away from the heat dissipation layer forms the mounting surface. Each positioning hole and each viewing hole passes through the fixing layer and the heat dissipation layer sequentially along the stacking direction of the fixing layer and the heat dissipation layer.
10. The voltage acquisition device for a battery module as described in claim 9, characterized in that, The heat dissipation layer is a ceramic layer, and the fixing layer is a bakelite board layer.