Battery pack structure and energy storage device

Abstract

The battery pack structure comprises a mounting frame, a battery pack, a battery signal acquisition plate and at least two current collecting tabs. The mounting frame is used for being mounted on the inner side of the shell of an energy storage device, and a mounting space is formed between the mounting frame and the shell. The battery pack is arranged in the mounting space. The mounting frame is formed with at least two mounting portions. At least one current collecting tab is arranged on each mounting portion, and each current collecting tab contacts one same-potential electrode portion of the battery pack. The battery signal acquisition plate is mounted on the mounting frame, and the battery signal acquisition plate is in contact with and electrically connected with the at least two current collecting tabs, so that the electrical signals of each single battery can be acquired at one time through the battery signal acquisition plate. Therefore, the use of a wire harness in the energy storage device can be greatly reduced, and the influence of crosstalk interference on the acquisition accuracy of the battery signal acquisition plate is reduced.

Description

Technical Field

[0001] This disclosure relates to the technical field of new energy storage, and in particular to a battery pack structure and energy storage device. Background Technology

[0002] Traditional battery packs are typically assembled into a PACK using components such as end plates and upper and lower supports, and then encapsulated in a housing to form an energy storage device. This assembly process is complex, and the end plates and supports require additional space within the housing. To optimize energy storage devices, some manufacturers directly and securely mount the battery pack onto the housing, simplifying the process and improving space utilization. However, due to the reduction in the size of energy storage power supplies and the change in battery pack placement, battery signal acquisition devices used by users to monitor battery current and voltage require more wiring harnesses to electrically connect to the individual cells. With more wiring harnesses, they tend to cluster together, leading to crosstalk and interference between different harnesses, ultimately reducing the accuracy of the battery signal acquisition devices. Utility Model Content

[0003] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a battery pack structure and energy storage device with fewer wiring harnesses and higher battery signal acquisition accuracy.

[0004] The purpose of this disclosure is achieved through the following technical solution:

[0005] A battery pack structure, comprising:

[0006] The mounting frame is used to install inside the outer casing of the energy storage device, and an installation space is formed between the mounting frame and the outer casing;

[0007] A battery pack, wherein the battery pack is disposed within the installation space;

[0008] The battery pack structure also includes a battery signal acquisition board and at least two current collectors;

[0009] The mounting frame has at least two mounting portions; each mounting portion is provided with at least one current collector, and each current collector contacts an electrode portion of the battery pack at the same potential; the battery signal acquisition board is mounted on the mounting frame, and the battery signal acquisition board is in contact with and electrically connected to at least two current collectors to acquire the electrical signals of each corresponding individual cell in the battery pack.

[0010] In some embodiments, the battery signal acquisition board is welded to each of the current collectors located on the same side of the battery pack.

[0011] In some embodiments, the battery signal acquisition board has a pressure relief hole, which corresponds to the electrode setting of the individual battery cell.

[0012] In some embodiments, the battery signal acquisition board has welding through holes, which correspond to the welding positions of the current collector.

[0013] In some embodiments, the battery signal acquisition board is attached to the current collector and locked to the mounting portion.

[0014] In some embodiments, the mounting portion has a positioning post that passes through the current collector and the battery signal acquisition board in sequence.

[0015] In some embodiments, the current collector is fitted with a limiting solder pad, which is inclinedly disposed between the current collector and the battery signal acquisition board. The two ends of the limiting solder pad respectively engage with the battery signal acquisition board, and the current collector is welded to the battery signal acquisition board through the limiting solder pad.

[0016] In some embodiments, the battery pack structure further includes a BMS board mounted on the mounting frame, the BMS board being latched and electrically connected to the total positive electrode and the total negative electrode of the battery pack.

[0017] In some embodiments, the mounting frame has several ventilation windows, a ventilation gap is formed between the BMS board and the mounting frame, and each individual battery cell faces the ventilation gap through a corresponding ventilation window; and / or

[0018] The BMS board is equipped with a heat sink and a fan, with the air outlet of the fan facing the heat sink.

[0019] An energy storage device includes a housing and a battery pack structure according to any of the above embodiments; the mounting frame is installed on the inner side of the housing.

[0020] Compared with the prior art, this disclosure has at least the following advantages:

[0021] The aforementioned battery pack structure, by mounting current collectors on the mounting section, allows the current collectors to contact an electrode at the same potential within the battery pack. This enables the individual cells in the battery pack to be connected in series, parallel, or mixed connections. A battery signal acquisition board, mounted on the mounting frame, then contacts and is electrically connected to at least two current collectors, allowing for the simultaneous acquisition of the electrical signals of each individual cell in the battery pack. This significantly reduces the use of wiring harnesses in energy storage devices and minimizes the impact of crosstalk interference on the acquisition accuracy of the battery signal acquisition board. The electrical signal of each individual cell is either its voltage or current signal. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a battery pack structure installed in a housing according to an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 The enlarged view shown at point A in the middle;

[0025] Figure 3 for Figure 1 The diagram shows the battery pack structure and its casing in an explosion state.

[0026] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the battery pack structure mounted on the casing.

[0027] Figure label:

[0028] 100. Battery pack structure; 200. Casing;

[0029] 110. Mounting frame; 1110. Mounting section; 1111. Positioning post; 1101. Ventilation window;

[0030] 120. Battery pack; 1210. Single cell; 1211. Overall positive electrode; 1212. Overall negative electrode; 1213. Electrode section at the same potential;

[0031] 130. Battery signal acquisition board; 1301. Pressure relief hole; 1302. Welding through hole;

[0032] 140. Current collector; 1410. Positioning pad;

[0033] 150, BMS board; 1501, ventilation gap; 1510, first hardware terminal; 1520, second hardware terminal; 1530, hardware bracket;

[0034] 160. Heat sink;

[0035] 170. Heatsink fan;

[0036] 180. Cushioning and protective cotton. Detailed Implementation

[0037] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] 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 disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0041] Please see Figure 1 and Figure 2One embodiment of the battery pack structure 100 includes a mounting frame 110, a battery pack 120, a battery signal acquisition board 130, and at least two current collectors 140. The mounting frame 110 is used to install inside the housing 200 of the energy storage device, and an installation space is formed between the mounting frame 110 and the housing 200. The battery pack 120 is disposed in the installation space. The mounting frame 110 has at least two mounting portions 1110. At least one current collector 140 is disposed on each mounting portion 1110, and each current collector 140 contacts a same potential electrode portion 1213 of the battery pack 120. The battery signal acquisition board 130 is mounted on the mounting frame 110, and the battery signal acquisition board 130 contacts and is electrically connected to the at least two current collectors 140 to acquire the electrical signals of each corresponding individual battery cell 1210 in the battery pack 120.

[0042] It is understood that by mounting the current collector 140 on the mounting part 1110, the current collector 140 can contact an electrode part 1213 of the battery pack 120 at the same potential, thereby allowing the individual cells 1210 in the battery pack 120 to be connected in series, parallel, or mixed. Then, the battery signal acquisition board 130 mounted on the mounting frame 110 contacts and is electrically connected to at least two current collectors 140, thereby enabling the acquisition of the electrical signals of each corresponding individual cell 1210 in the battery pack 120 at once. This can greatly reduce the use of wiring harnesses in energy storage devices and reduce the impact of crosstalk interference on the acquisition accuracy of the battery signal acquisition board 130. The electrical signal of the individual cell 1210 is either the voltage signal or the current signal of the individual cell 1210.

[0043] It should be noted that the battery pack 120 has at least two individual cells 1210, and the same potential electrode portion 1213 in the battery pack 120 is composed of the electrode terminals with the same potential of the at least two individual cells 1210 in the battery pack 120. A current collector 140 is in contact with the electrode terminals with the same potential of the at least two individual cells 1210.

[0044] In one embodiment, the electrodes of each individual cell in the battery pack on the same side have the same polarity and form an electrode section with the same potential; the electrodes of each individual cell on the same side are in contact with the same current collector, so that the individual cells in the battery pack can be connected in parallel through two current collectors.

[0045] In another embodiment, the polarities of the terminals of every two adjacent individual cells are different. Along the arrangement direction of the individual cells, the positive terminal of the middle cell is connected to the negative terminal of the preceding cell via a current collector, and the negative terminal of the middle cell is connected to the positive terminal of the following cell via another current collector, thereby connecting the individual cells in series along the arrangement direction via at least two current collectors. The positive terminal of the middle cell and the negative terminal of the preceding cell form a single-potential electrode section, and the negative terminal of the middle cell and the positive terminal of the following cell form another potential electrode section.

[0046] In other embodiments, at least two adjacent individual cells in the battery pack constitute a battery cell; the polarities of the electrodes on the same side of each individual cell in the same battery cell are all the same, forming an electrode facet; the polarities of the electrode faces on the same side of two adjacent battery cells are different, forming a common potential electrode portion. It can be understood that a common potential electrode portion of the battery pack contacts the same current collector, such that the electrodes on the same side of each individual cell in the same battery cell are connected in parallel through the same current collector, while the electrode faces on the same side of two adjacent battery cells are connected in series through the same current collector, so that the individual cells in the battery pack are interconnected.

[0047] Please see Figure 1 In some embodiments, the battery signal acquisition board 130 is welded to each current collector 140 located on the same side of the battery pack 120. It is understood that welding establishes a stable electrical connection between the battery signal acquisition board 130 and each current collector 140 located on the same side of the battery pack 120, thereby enabling the simultaneous acquisition of voltage or current signals from the same terminal of each individual battery cell 1210 in the battery pack 120 via a single battery signal acquisition board 130. As an example, in this embodiment, there are two battery signal acquisition boards 130, respectively disposed on opposite sides of the battery pack 120.

[0048] Please see Figure 1 In some embodiments, the battery signal acquisition board 130 is provided with a pressure relief hole 1301, which corresponds to the electrode setting of the individual battery 1210. It can be understood that since the pressure relief hole 1301 on the battery signal acquisition board 130 corresponds to the electrode setting of the individual battery 1210, when the individual battery 1210 experiences thermal runaway and generates gas, the gas can overflow through the corresponding pressure relief hole 1301, thus playing a role in pressure reduction and explosion prevention.

[0049] Please see Figure 1 and Figure 2In some embodiments, the battery signal acquisition board 130 has welding through holes 1302, which correspond to the welding positions of the current collector 140. It can be understood that since the welding through holes 1302 on the battery signal acquisition board 130 correspond to the welding positions of the current collector 140, when welding is required between the battery signal acquisition board 130 and the current collector 140, the welding head or welding laser can directly act on the welding positions of the current collector 140 through the welding through holes 1302, thereby improving the efficiency of the welding operation between the battery signal acquisition board 130 and the current collector 140. As an example only, in this embodiment, the welding method between the battery signal acquisition board 130 and the current collector 140 is laser welding.

[0050] Please see Figure 1 and Figure 2 In some embodiments, the battery signal acquisition board 130 is attached to the current collector 140 and locked to the mounting portion 1110. It is understood that because the battery signal acquisition board 130 is attached to the current collector 140, locking the battery signal acquisition board 130 to the mounting portion 1110 allows for a more stable attachment between the battery signal acquisition board 130 and the current collector 140, thereby making the acquisition of electrical signals from the individual battery cells 1210 by the battery signal acquisition board 130 more stable.

[0051] Please see Figure 1 and Figure 2 In some embodiments, a positioning post 1111 is formed on the mounting portion 1110, and the positioning post 1111 passes through the current collector 140 and the battery signal acquisition board 130 in sequence. It can be understood that by having the positioning post 1111 formed on the mounting portion 1110 pass through the current collector 140 and the battery signal acquisition board 130 in sequence, the welding positions on the current collector 140 and the battery signal acquisition board 130 can be aligned, ultimately improving the accuracy of subsequent welding processes. As an example only, in this embodiment, the positioning post 1111 passes through a first hole in the current collector 140 and a second hole in the battery signal acquisition board 130.

[0052] Please see Figure 1 and Figure 2In some embodiments, a limiting solder tab 1410 is mounted on the current collector 140, and the limiting solder tab 1410 is inclinedly disposed between the current collector 140 and the battery signal acquisition board 130. The two ends of the limiting solder tab 1410 respectively engage with the battery signal acquisition board 130, and the current collector 140 is welded to the battery signal acquisition board 130 through the limiting solder tab 1410. It can be understood that because the limiting solder tab 1410 is kept inclined between the current collector 140 and the battery signal acquisition board 130, by having the two ends of the limiting solder tab 1410 engage with the battery signal acquisition board 130, the position of the battery signal acquisition board 130 can be limited by the limiting solder tab 1410, thereby reducing loosening of the battery signal acquisition board 130 during the welding operation. As an example only, in this embodiment, the end of the limiting solder tab 1410 forms a bent portion, and the battery signal acquisition board 130 has a strip-shaped hole, with each bent portion engaging with one strip-shaped hole.

[0053] Please see Figure 3 In some embodiments, the battery pack structure 100 further includes a BMS board 150, which is mounted on the mounting frame 110. The BMS board 150 is respectively locked to and electrically connected to the total positive electrode 1211 and the total negative electrode 1212 of the battery pack 120. It can be understood that because the BMS board 150 mounted on the mounting frame 110 is respectively locked to the total positive electrode 1211 and the total negative electrode 1212 of the battery pack 120, the battery pack 120 can be directly electrically connected to the BMS board 150, further reducing the use of wiring harnesses in the energy storage device and reducing the impact of crosstalk interference on the acquisition accuracy of the BMS board 150. As an example only, in this embodiment, the screws on the positive electrode 1211 of the battery pack 120 are threaded to the first hardware terminal 1510 on the BMS board 150, and the screws on the negative electrode 1212 of the battery pack 120 are threaded to the second hardware terminal 1520 on the BMS board 150. The BMS board 150 integrates an inverter.

[0054] Please see Figure 3 and Figure 4 In some embodiments, the mounting frame 110 has a plurality of ventilation windows 1101, and a ventilation gap 1501 is formed between the BMS board 150 and the mounting frame 110. Each individual battery cell 1210 is opposite to the ventilation gap 1501 through a corresponding ventilation window 1101. It can be understood that since each individual battery cell 1210 is opposite to the ventilation gap 1501 through a corresponding ventilation window 1101 on the mounting frame 110, heat on the surface of the individual battery cell 1210 can be diffused to the ventilation gap 1501 through the ventilation window 1101, thereby accelerating the heat dissipation of the individual battery cell 1210.

[0055] Please see Figure 1 and Figure 4 In some embodiments, a heat sink 160 and a cooling fan 170 are mounted on the BMS board 150, with the exhaust port of the cooling fan 170 facing the heat sink 160. It is understood that the heat sink 160 on the BMS board 150 increases the heat dissipation of the BMS board 150, and the exhaust port of the cooling fan 170 facing the heat sink 160 accelerates the heat dissipation of the heat sink 160. As an example only, in this embodiment, the cooling fan 170 is mounted on a hardware bracket 1530 on the BMS board 150.

[0056] Please see Figures 1 to 4 This disclosure also provides an energy storage device, including a housing 200 and a battery pack structure 100 of any of the above embodiments; a mounting frame 110 is mounted on the inner side of the housing 200. For illustrative purposes only, in this embodiment, the housing 200 is the bottom shell of the energy storage device. It is understood that, since the mounting frame 110 is mounted on the inner side of the housing 200, a honeycomb reinforcing rib network structure is formed on the inner sidewall of the housing 200. The battery pack 120 is disposed in the mounting space between the mounting frame 110 and the housing 200. A buffer protective cotton 180 or thermally conductive silicone is disposed between the battery pack 120 and the honeycomb reinforcing rib network structure. The buffer protective cotton 180 or thermally conductive silicone can protect the battery pack 120 and conduct heat, while the honeycomb reinforcing rib network structure can improve the impact resistance of the housing 200 and increase the heat dissipation space. The honeycomb reinforcing rib network structure improves the vibration resistance by 30%.

[0057] The aforementioned energy storage equipment achieves a better balance between lightweight and strength, not only realizing efficient use of materials but also higher space utilization and energy density. It integrates functions such as heat dissipation, electrical connection, wireless connectivity, and installation, reducing assembly steps, reducing connection structures by more than 30%, improving heat dissipation efficiency by more than 25%, reducing production costs, and improving structural stability.

[0058] Compared with the prior art, this disclosure has at least the following advantages:

[0059] The aforementioned battery pack structure 100, by mounting current collectors 140 on the mounting portion 1110, allows the current collectors 140 to contact an electrode portion 1213 of the battery pack 120 at the same potential, thereby enabling the individual cells 1210 in the battery pack 120 to be connected in series, parallel, or mixed. Then, a battery signal acquisition board 130 mounted on the mounting frame 110 contacts and is electrically connected to at least two current collectors 140, thus enabling the simultaneous acquisition of the electrical signals of each corresponding individual cell 1210 in the battery pack 120. This significantly reduces the use of wiring harnesses in energy storage devices and reduces the impact of crosstalk interference on the acquisition accuracy of the battery signal acquisition board 130. The electrical signal of the individual cell 1210 is either its voltage signal or current signal.

[0060] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the 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 disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A battery pack structure, comprising: Mounting frame (110) is used to install inside the housing (200) of the energy storage device, and an installation space is formed between the mounting frame (110) and the housing (200); A battery pack (120) is disposed within the mounting space; The battery pack structure is characterized in that it further includes a battery signal acquisition board (130) and at least two current collectors (140); The mounting frame (110) has at least two mounting portions (1110); each mounting portion (1110) is provided with at least one current collector (140), and each current collector (140) contacts a same potential electrode portion (1213) of the battery pack (120); the battery signal acquisition board (130) is mounted on the mounting frame (110), and the battery signal acquisition board (130) contacts and is electrically connected to at least two current collectors (140) to acquire the electrical signals of each corresponding single cell (1210) in the battery pack (120).

2. The battery pack structure according to claim 1, characterized in that, The battery signal acquisition board (130) is welded to each of the current collectors (140) located on the same side of the battery pack (120).

3. The battery pack structure according to claim 2, characterized in that, The battery signal acquisition board (130) is provided with a pressure relief hole (1301), which is set at the electrode of the single battery cell (1210).

4. The battery pack structure according to claim 2, characterized in that, The battery signal acquisition board (130) has a welding through hole (1302), which corresponds to the welding position of the current collector (140).

5. The battery pack structure according to claim 2, characterized in that, The battery signal acquisition board (130) is attached to the current collector (140) and locked to the mounting part (1110).

6. The battery pack structure according to claim 5, characterized in that, A positioning post (1111) is formed on the mounting part (1110), and the positioning post (1111) passes through the current collector (140) and the battery signal acquisition board (130) in sequence.

7. The battery pack structure according to claim 5, characterized in that, A limiting solder pad (1410) is mounted on the current collector (140), and the limiting solder pad (1410) is inclinedly disposed between the current collector (140) and the battery signal acquisition board (130); the two ends of the limiting solder pad (1410) respectively engage with the battery signal acquisition board (130), and the current collector (140) is welded to the battery signal acquisition board (130) through the limiting solder pad (1410).

8. The battery pack structure according to claim 1, characterized in that, The battery pack structure also includes a BMS board (150), which is mounted on the mounting frame (110). The BMS board (150) is locked and electrically connected to the total positive electrode (1211) and the total negative electrode (1212) of the battery pack (120).

9. The battery pack structure according to claim 8, characterized in that, The mounting frame (110) has a plurality of ventilation windows (1101), and a ventilation gap (1501) is formed between the BMS board (150) and the mounting frame (110). Each individual battery cell (1210) is opposite to the ventilation gap (1501) through a corresponding ventilation window (1101); and / or, The BMS board (150) is equipped with a heat sink (160) and a fan (170), with the air outlet of the fan (170) facing the heat sink (160).

10. An energy storage device, characterized in that, The device includes a housing (200) and a battery pack structure according to any one of claims 1 to 9; the mounting frame (110) is mounted on the inner side of the housing (200).

Images